Mercurial > babel > old > babel-test
annotate babel/dates.py @ 375:369300a7ebd3
Implement support for aliases in the CLDR data. Closes #68. Also, update to CLDR 1.6, and a much improved `dump_data` script.
author | cmlenz |
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date | Mon, 07 Jul 2008 14:49:16 +0000 |
parents | 6482dc682455 |
children | a7980c2e77a6 |
rev | line source |
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1 | 1 # -*- coding: utf-8 -*- |
2 # | |
3 # Copyright (C) 2007 Edgewall Software | |
4 # All rights reserved. | |
5 # | |
6 # This software is licensed as described in the file COPYING, which | |
7 # you should have received as part of this distribution. The terms | |
8 # are also available at http://babel.edgewall.org/wiki/License. | |
9 # | |
10 # This software consists of voluntary contributions made by many | |
11 # individuals. For the exact contribution history, see the revision | |
12 # history and logs, available at http://babel.edgewall.org/log/. | |
13 | |
14 """Locale dependent formatting and parsing of dates and times. | |
15 | |
16 The default locale for the functions in this module is determined by the | |
17 following environment variables, in that order: | |
18 | |
19 * ``LC_TIME``, | |
20 * ``LC_ALL``, and | |
21 * ``LANG`` | |
22 """ | |
23 | |
29 | 24 from datetime import date, datetime, time, timedelta, tzinfo |
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25 import re |
1 | 26 |
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27 from babel.core import default_locale, get_global, Locale |
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28 from babel.util import UTC |
1 | 29 |
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30 __all__ = ['format_date', 'format_datetime', 'format_time', |
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31 'get_timezone_name', 'parse_date', 'parse_datetime', 'parse_time'] |
1 | 32 __docformat__ = 'restructuredtext en' |
33 | |
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34 LC_TIME = default_locale('LC_TIME') |
1 | 35 |
33 | 36 # Aliases for use in scopes where the modules are shadowed by local variables |
37 date_ = date | |
38 datetime_ = datetime | |
39 time_ = time | |
40 | |
1 | 41 def get_period_names(locale=LC_TIME): |
42 """Return the names for day periods (AM/PM) used by the locale. | |
43 | |
44 >>> get_period_names(locale='en_US')['am'] | |
45 u'AM' | |
46 | |
47 :param locale: the `Locale` object, or a locale string | |
48 :return: the dictionary of period names | |
49 :rtype: `dict` | |
50 """ | |
51 return Locale.parse(locale).periods | |
52 | |
53 def get_day_names(width='wide', context='format', locale=LC_TIME): | |
54 """Return the day names used by the locale for the specified format. | |
55 | |
56 >>> get_day_names('wide', locale='en_US')[1] | |
15 | 57 u'Tuesday' |
1 | 58 >>> get_day_names('abbreviated', locale='es')[1] |
15 | 59 u'mar' |
1 | 60 >>> get_day_names('narrow', context='stand-alone', locale='de_DE')[1] |
15 | 61 u'D' |
1 | 62 |
63 :param width: the width to use, one of "wide", "abbreviated", or "narrow" | |
64 :param context: the context, either "format" or "stand-alone" | |
65 :param locale: the `Locale` object, or a locale string | |
66 :return: the dictionary of day names | |
67 :rtype: `dict` | |
68 """ | |
69 return Locale.parse(locale).days[context][width] | |
70 | |
71 def get_month_names(width='wide', context='format', locale=LC_TIME): | |
72 """Return the month names used by the locale for the specified format. | |
73 | |
74 >>> get_month_names('wide', locale='en_US')[1] | |
75 u'January' | |
76 >>> get_month_names('abbreviated', locale='es')[1] | |
77 u'ene' | |
78 >>> get_month_names('narrow', context='stand-alone', locale='de_DE')[1] | |
79 u'J' | |
80 | |
81 :param width: the width to use, one of "wide", "abbreviated", or "narrow" | |
82 :param context: the context, either "format" or "stand-alone" | |
83 :param locale: the `Locale` object, or a locale string | |
84 :return: the dictionary of month names | |
85 :rtype: `dict` | |
86 """ | |
87 return Locale.parse(locale).months[context][width] | |
88 | |
89 def get_quarter_names(width='wide', context='format', locale=LC_TIME): | |
90 """Return the quarter names used by the locale for the specified format. | |
91 | |
92 >>> get_quarter_names('wide', locale='en_US')[1] | |
93 u'1st quarter' | |
94 >>> get_quarter_names('abbreviated', locale='de_DE')[1] | |
95 u'Q1' | |
96 | |
97 :param width: the width to use, one of "wide", "abbreviated", or "narrow" | |
98 :param context: the context, either "format" or "stand-alone" | |
99 :param locale: the `Locale` object, or a locale string | |
100 :return: the dictionary of quarter names | |
101 :rtype: `dict` | |
102 """ | |
103 return Locale.parse(locale).quarters[context][width] | |
104 | |
105 def get_era_names(width='wide', locale=LC_TIME): | |
106 """Return the era names used by the locale for the specified format. | |
107 | |
108 >>> get_era_names('wide', locale='en_US')[1] | |
109 u'Anno Domini' | |
110 >>> get_era_names('abbreviated', locale='de_DE')[1] | |
111 u'n. Chr.' | |
112 | |
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113 :param width: the width to use, either "wide", "abbreviated", or "narrow" |
1 | 114 :param locale: the `Locale` object, or a locale string |
115 :return: the dictionary of era names | |
116 :rtype: `dict` | |
117 """ | |
118 return Locale.parse(locale).eras[width] | |
119 | |
120 def get_date_format(format='medium', locale=LC_TIME): | |
121 """Return the date formatting patterns used by the locale for the specified | |
122 format. | |
123 | |
124 >>> get_date_format(locale='en_US') | |
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125 <DateTimePattern u'MMM d, yyyy'> |
1 | 126 >>> get_date_format('full', locale='de_DE') |
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127 <DateTimePattern u'EEEE, d. MMMM yyyy'> |
1 | 128 |
129 :param format: the format to use, one of "full", "long", "medium", or | |
130 "short" | |
131 :param locale: the `Locale` object, or a locale string | |
132 :return: the date format pattern | |
33 | 133 :rtype: `DateTimePattern` |
1 | 134 """ |
135 return Locale.parse(locale).date_formats[format] | |
136 | |
33 | 137 def get_datetime_format(format='medium', locale=LC_TIME): |
138 """Return the datetime formatting patterns used by the locale for the | |
139 specified format. | |
140 | |
141 >>> get_datetime_format(locale='en_US') | |
142 u'{1} {0}' | |
143 | |
144 :param format: the format to use, one of "full", "long", "medium", or | |
145 "short" | |
146 :param locale: the `Locale` object, or a locale string | |
147 :return: the datetime format pattern | |
148 :rtype: `unicode` | |
149 """ | |
150 patterns = Locale.parse(locale).datetime_formats | |
151 if format not in patterns: | |
152 format = None | |
153 return patterns[format] | |
154 | |
1 | 155 def get_time_format(format='medium', locale=LC_TIME): |
156 """Return the time formatting patterns used by the locale for the specified | |
157 format. | |
158 | |
159 >>> get_time_format(locale='en_US') | |
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160 <DateTimePattern u'h:mm:ss a'> |
1 | 161 >>> get_time_format('full', locale='de_DE') |
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162 <DateTimePattern u'HH:mm:ss v'> |
1 | 163 |
164 :param format: the format to use, one of "full", "long", "medium", or | |
165 "short" | |
166 :param locale: the `Locale` object, or a locale string | |
167 :return: the time format pattern | |
33 | 168 :rtype: `DateTimePattern` |
1 | 169 """ |
170 return Locale.parse(locale).time_formats[format] | |
171 | |
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172 def get_timezone_gmt(datetime=None, width='long', locale=LC_TIME): |
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173 """Return the timezone associated with the given `datetime` object formatted |
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174 as string indicating the offset from GMT. |
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175 |
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176 >>> dt = datetime(2007, 4, 1, 15, 30) |
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177 >>> get_timezone_gmt(dt, locale='en') |
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178 u'GMT+00:00' |
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179 |
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180 >>> from pytz import timezone |
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181 >>> tz = timezone('America/Los_Angeles') |
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182 >>> dt = datetime(2007, 4, 1, 15, 30, tzinfo=tz) |
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183 >>> get_timezone_gmt(dt, locale='en') |
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184 u'GMT-08:00' |
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185 >>> get_timezone_gmt(dt, 'short', locale='en') |
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186 u'-0800' |
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187 |
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188 The long format depends on the locale, for example in France the acronym |
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189 UTC string is used instead of GMT: |
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190 |
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191 >>> get_timezone_gmt(dt, 'long', locale='fr_FR') |
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192 u'UTC-08:00' |
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193 |
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194 :param datetime: the ``datetime`` object; if `None`, the current date and |
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195 time in UTC is used |
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196 :param width: either "long" or "short" |
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197 :param locale: the `Locale` object, or a locale string |
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198 :return: the GMT offset representation of the timezone |
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199 :rtype: `unicode` |
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200 :since: version 0.9 |
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201 """ |
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202 if datetime is None: |
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203 datetime = datetime_.utcnow() |
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204 elif isinstance(datetime, (int, long)): |
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205 datetime = datetime_.utcfromtimestamp(datetime).time() |
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206 if datetime.tzinfo is None: |
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207 datetime = datetime.replace(tzinfo=UTC) |
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208 locale = Locale.parse(locale) |
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209 |
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210 offset = datetime.utcoffset() |
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211 seconds = offset.days * 24 * 60 * 60 + offset.seconds |
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212 hours, seconds = divmod(seconds, 3600) |
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213 if width == 'short': |
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214 pattern = u'%+03d%02d' |
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215 else: |
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216 pattern = locale.zone_formats['gmt'] % '%+03d:%02d' |
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217 return pattern % (hours, seconds // 60) |
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218 |
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219 def get_timezone_location(dt_or_tzinfo=None, locale=LC_TIME): |
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220 """Return a representation of the given timezone using "location format". |
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221 |
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222 The result depends on both the local display name of the country and the |
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223 city assocaited with the time zone: |
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224 |
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225 >>> from pytz import timezone |
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226 >>> tz = timezone('America/St_Johns') |
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227 >>> get_timezone_location(tz, locale='de_DE') |
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228 u"Kanada (St. John's)" |
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229 >>> tz = timezone('America/Mexico_City') |
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230 >>> get_timezone_location(tz, locale='de_DE') |
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231 u'Mexiko (Mexiko-Stadt)' |
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232 |
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233 If the timezone is associated with a country that uses only a single |
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234 timezone, just the localized country name is returned: |
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235 |
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236 >>> tz = timezone('Europe/Berlin') |
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237 >>> get_timezone_name(tz, locale='de_DE') |
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238 u'Deutschland' |
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239 |
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240 :param dt_or_tzinfo: the ``datetime`` or ``tzinfo`` object that determines |
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241 the timezone; if `None`, the current date and time in |
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242 UTC is assumed |
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243 :param locale: the `Locale` object, or a locale string |
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244 :return: the localized timezone name using location format |
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245 :rtype: `unicode` |
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246 :since: version 0.9 |
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247 """ |
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248 if dt_or_tzinfo is None or isinstance(dt_or_tzinfo, (int, long)): |
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249 dt = None |
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250 tzinfo = UTC |
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251 elif isinstance(dt_or_tzinfo, (datetime, time)): |
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252 dt = dt_or_tzinfo |
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253 if dt.tzinfo is not None: |
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254 tzinfo = dt.tzinfo |
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255 else: |
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256 tzinfo = UTC |
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257 else: |
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258 dt = None |
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259 tzinfo = dt_or_tzinfo |
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260 locale = Locale.parse(locale) |
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261 |
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262 if hasattr(tzinfo, 'zone'): |
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263 zone = tzinfo.zone |
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264 else: |
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265 zone = tzinfo.tzname(dt or datetime.utcnow()) |
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266 |
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267 # Get the canonical time-zone code |
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268 zone = get_global('zone_aliases').get(zone, zone) |
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269 |
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270 info = locale.time_zones.get(zone, {}) |
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271 |
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272 # Otherwise, if there is only one timezone for the country, return the |
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273 # localized country name |
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274 region_format = locale.zone_formats['region'] |
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275 territory = get_global('zone_territories').get(zone) |
254
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276 if territory not in locale.territories: |
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277 territory = 'ZZ' # invalid/unknown |
233
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278 territory_name = locale.territories[territory] |
254
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279 if territory and len(get_global('territory_zones').get(territory, [])) == 1: |
233
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280 return region_format % (territory_name) |
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281 |
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282 # Otherwise, include the city in the output |
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283 fallback_format = locale.zone_formats['fallback'] |
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284 if 'city' in info: |
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285 city_name = info['city'] |
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286 else: |
345
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287 metazone = get_global('meta_zones').get(zone) |
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288 metazone_info = locale.meta_zones.get(metazone, {}) |
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289 if 'city' in metazone_info: |
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290 city_name = metainfo['city'] |
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291 elif '/' in zone: |
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292 city_name = zone.split('/', 1)[1].replace('_', ' ') |
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293 else: |
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294 city_name = zone.replace('_', ' ') |
233
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295 |
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296 return region_format % (fallback_format % { |
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297 '0': city_name, |
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298 '1': territory_name |
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299 }) |
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300 |
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301 def get_timezone_name(dt_or_tzinfo=None, width='long', uncommon=False, |
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302 locale=LC_TIME): |
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303 r"""Return the localized display name for the given timezone. The timezone |
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304 may be specified using a ``datetime`` or `tzinfo` object. |
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305 |
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306 >>> from pytz import timezone |
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307 >>> dt = time(15, 30, tzinfo=timezone('America/Los_Angeles')) |
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308 >>> get_timezone_name(dt, locale='en_US') |
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309 u'Pacific Standard Time' |
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310 >>> get_timezone_name(dt, width='short', locale='en_US') |
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311 u'PST' |
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312 |
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313 If this function gets passed only a `tzinfo` object and no concrete |
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314 `datetime`, the returned display name is indenpendent of daylight savings |
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315 time. This can be used for example for selecting timezones, or to set the |
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316 time of events that recur across DST changes: |
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317 |
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318 >>> tz = timezone('America/Los_Angeles') |
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319 >>> get_timezone_name(tz, locale='en_US') |
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320 u'Pacific Time' |
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321 >>> get_timezone_name(tz, 'short', locale='en_US') |
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322 u'PT' |
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323 |
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324 If no localized display name for the timezone is available, and the timezone |
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325 is associated with a country that uses only a single timezone, the name of |
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326 that country is returned, formatted according to the locale: |
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327 |
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328 >>> tz = timezone('Europe/Berlin') |
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329 >>> get_timezone_name(tz, locale='de_DE') |
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330 u'Deutschland' |
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331 >>> get_timezone_name(tz, locale='pt_BR') |
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332 u'Hor\xe1rio Alemanha' |
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333 |
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334 On the other hand, if the country uses multiple timezones, the city is also |
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335 included in the representation: |
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336 |
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337 >>> tz = timezone('America/St_Johns') |
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338 >>> get_timezone_name(tz, locale='de_DE') |
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339 u"Kanada (St. John's)" |
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340 |
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341 The `uncommon` parameter can be set to `True` to enable the use of timezone |
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342 representations that are not commonly used by the requested locale. For |
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343 example, while in frensh the central europian timezone is usually |
323 | 344 abbreviated as "HEC", in Canadian French, this abbreviation is not in |
345 common use, so a generic name would be chosen by default: | |
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346 |
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347 >>> tz = timezone('Europe/Paris') |
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348 >>> get_timezone_name(tz, 'short', locale='fr_CA') |
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349 u'France' |
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350 >>> get_timezone_name(tz, 'short', uncommon=True, locale='fr_CA') |
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351 u'HEC' |
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352 |
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353 :param dt_or_tzinfo: the ``datetime`` or ``tzinfo`` object that determines |
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354 the timezone; if a ``tzinfo`` object is used, the |
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355 resulting display name will be generic, i.e. |
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356 independent of daylight savings time; if `None`, the |
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357 current date in UTC is assumed |
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358 :param width: either "long" or "short" |
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359 :param uncommon: whether even uncommon timezone abbreviations should be used |
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360 :param locale: the `Locale` object, or a locale string |
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361 :return: the timezone display name |
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362 :rtype: `unicode` |
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363 :since: version 0.9 |
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364 :see: `LDML Appendix J: Time Zone Display Names |
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365 <http://www.unicode.org/reports/tr35/#Time_Zone_Fallback>`_ |
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366 """ |
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367 if dt_or_tzinfo is None or isinstance(dt_or_tzinfo, (int, long)): |
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368 dt = None |
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369 tzinfo = UTC |
256 | 370 elif isinstance(dt_or_tzinfo, (datetime, time)): |
233
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371 dt = dt_or_tzinfo |
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372 if dt.tzinfo is not None: |
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373 tzinfo = dt.tzinfo |
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374 else: |
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375 tzinfo = UTC |
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376 else: |
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377 dt = None |
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378 tzinfo = dt_or_tzinfo |
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379 locale = Locale.parse(locale) |
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380 |
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381 if hasattr(tzinfo, 'zone'): |
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382 zone = tzinfo.zone |
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383 else: |
348
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384 zone = tzinfo.tzname(dt) |
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385 |
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386 # Get the canonical time-zone code |
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387 zone = get_global('zone_aliases').get(zone, zone) |
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388 |
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389 info = locale.time_zones.get(zone, {}) |
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390 # Try explicitly translated zone names first |
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391 if width in info: |
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392 if dt is None: |
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393 field = 'generic' |
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394 else: |
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395 dst = tzinfo.dst(dt) |
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396 if dst is None: |
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397 field = 'generic' |
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398 elif dst == 0: |
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399 field = 'standard' |
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400 else: |
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401 field = 'daylight' |
233
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402 if field in info[width]: |
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403 return info[width][field] |
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404 |
345
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405 metazone = get_global('meta_zones').get(zone) |
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406 if metazone: |
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407 metazone_info = locale.meta_zones.get(metazone, {}) |
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408 if width in metazone_info and (uncommon or metazone_info.get('common')): |
233
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409 if dt is None: |
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410 field = 'generic' |
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411 else: |
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412 field = tzinfo.dst(dt) and 'daylight' or 'standard' |
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413 if field in metazone_info[width]: |
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414 return metazone_info[width][field] |
233
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415 |
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416 # If we have a concrete datetime, we assume that the result can't be |
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417 # independent of daylight savings time, so we return the GMT offset |
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418 if dt is not None: |
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419 return get_timezone_gmt(dt, width=width, locale=locale) |
233
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420 |
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421 return get_timezone_location(dt_or_tzinfo, locale=locale) |
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422 |
33 | 423 def format_date(date=None, format='medium', locale=LC_TIME): |
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424 """Return a date formatted according to the given pattern. |
1 | 425 |
426 >>> d = date(2007, 04, 01) | |
427 >>> format_date(d, locale='en_US') | |
428 u'Apr 1, 2007' | |
429 >>> format_date(d, format='full', locale='de_DE') | |
430 u'Sonntag, 1. April 2007' | |
431 | |
16 | 432 If you don't want to use the locale default formats, you can specify a |
433 custom date pattern: | |
434 | |
29 | 435 >>> format_date(d, "EEE, MMM d, ''yy", locale='en') |
16 | 436 u"Sun, Apr 1, '07" |
437 | |
33 | 438 :param date: the ``date`` or ``datetime`` object; if `None`, the current |
439 date is used | |
16 | 440 :param format: one of "full", "long", "medium", or "short", or a custom |
441 date/time pattern | |
19
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442 :param locale: a `Locale` object or a locale identifier |
1 | 443 :rtype: `unicode` |
19
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444 |
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445 :note: If the pattern contains time fields, an `AttributeError` will be |
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446 raised when trying to apply the formatting. This is also true if |
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447 the value of ``date`` parameter is actually a ``datetime`` object, |
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448 as this function automatically converts that to a ``date``. |
1 | 449 """ |
33 | 450 if date is None: |
451 date = date_.today() | |
452 elif isinstance(date, datetime): | |
18
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453 date = date.date() |
34 | 454 |
1 | 455 locale = Locale.parse(locale) |
456 if format in ('full', 'long', 'medium', 'short'): | |
457 format = get_date_format(format, locale=locale) | |
458 pattern = parse_pattern(format) | |
459 return parse_pattern(format).apply(date, locale) | |
460 | |
34 | 461 def format_datetime(datetime=None, format='medium', tzinfo=None, |
462 locale=LC_TIME): | |
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463 """Return a date formatted according to the given pattern. |
1 | 464 |
33 | 465 >>> dt = datetime(2007, 04, 01, 15, 30) |
466 >>> format_datetime(dt, locale='en_US') | |
467 u'Apr 1, 2007 3:30:00 PM' | |
468 | |
34 | 469 For any pattern requiring the display of the time-zone, the third-party |
470 ``pytz`` package is needed to explicitly specify the time-zone: | |
471 | |
472 >>> from pytz import timezone | |
233
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473 >>> format_datetime(dt, 'full', tzinfo=timezone('Europe/Paris'), |
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474 ... locale='fr_FR') |
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475 u'dimanche 1 avril 2007 17:30:00 HEC' |
34 | 476 >>> format_datetime(dt, "yyyy.MM.dd G 'at' HH:mm:ss zzz", |
477 ... tzinfo=timezone('US/Eastern'), locale='en') | |
478 u'2007.04.01 AD at 11:30:00 EDT' | |
479 | |
33 | 480 :param datetime: the `datetime` object; if `None`, the current date and |
481 time is used | |
16 | 482 :param format: one of "full", "long", "medium", or "short", or a custom |
483 date/time pattern | |
29 | 484 :param tzinfo: the timezone to apply to the time for display |
19
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485 :param locale: a `Locale` object or a locale identifier |
1 | 486 :rtype: `unicode` |
487 """ | |
33 | 488 if datetime is None: |
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489 datetime = datetime_.utcnow() |
34 | 490 elif isinstance(datetime, (int, long)): |
348
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491 datetime = datetime.utcfromtimestamp(datetime) |
34 | 492 elif isinstance(datetime, time): |
493 datetime = datetime_.combine(date.today(), datetime) | |
494 if datetime.tzinfo is None: | |
495 datetime = datetime.replace(tzinfo=UTC) | |
496 if tzinfo is not None: | |
497 datetime = datetime.astimezone(tzinfo) | |
101
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498 if hasattr(tzinfo, 'normalize'): # pytz |
34 | 499 datetime = tzinfo.normalize(datetime) |
500 | |
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501 locale = Locale.parse(locale) |
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502 if format in ('full', 'long', 'medium', 'short'): |
33 | 503 return get_datetime_format(format, locale=locale) \ |
34 | 504 .replace('{0}', format_time(datetime, format, tzinfo=None, |
33 | 505 locale=locale)) \ |
506 .replace('{1}', format_date(datetime, format, locale=locale)) | |
507 else: | |
508 return parse_pattern(format).apply(datetime, locale) | |
1 | 509 |
34 | 510 def format_time(time=None, format='medium', tzinfo=None, locale=LC_TIME): |
101
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511 """Return a time formatted according to the given pattern. |
1 | 512 |
513 >>> t = time(15, 30) | |
514 >>> format_time(t, locale='en_US') | |
515 u'3:30:00 PM' | |
516 >>> format_time(t, format='short', locale='de_DE') | |
517 u'15:30' | |
518 | |
16 | 519 If you don't want to use the locale default formats, you can specify a |
520 custom time pattern: | |
521 | |
522 >>> format_time(t, "hh 'o''clock' a", locale='en') | |
523 u"03 o'clock PM" | |
524 | |
29 | 525 For any pattern requiring the display of the time-zone, the third-party |
526 ``pytz`` package is needed to explicitly specify the time-zone: | |
527 | |
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528 >>> from pytz import timezone |
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529 >>> t = datetime(2007, 4, 1, 15, 30) |
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530 >>> tzinfo = timezone('Europe/Paris') |
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531 >>> t = tzinfo.localize(t) |
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532 >>> format_time(t, format='full', tzinfo=tzinfo, locale='fr_FR') |
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533 u'15:30:00 HEC' |
34 | 534 >>> format_time(t, "hh 'o''clock' a, zzzz", tzinfo=timezone('US/Eastern'), |
535 ... locale='en') | |
348
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536 u"09 o'clock AM, Eastern Daylight Time" |
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537 |
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538 As that example shows, when this function gets passed a |
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539 ``datetime.datetime`` value, the actual time in the formatted string is |
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540 adjusted to the timezone specified by the `tzinfo` parameter. If the |
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541 ``datetime`` is "naive" (i.e. it has no associated timezone information), |
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542 it is assumed to be in UTC. |
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543 |
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544 These timezone calculations are **not** performed if the value is of type |
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545 ``datetime.time``, as without date information there's no way to determine |
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546 what a given time would translate to in a different timezone without |
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547 information about whether daylight savings time is in effect or not. This |
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548 means that time values are left as-is, and the value of the `tzinfo` |
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549 parameter is only used to display the timezone name if needed: |
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550 |
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551 >>> t = time(15, 30) |
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552 >>> format_time(t, format='full', tzinfo=timezone('Europe/Paris'), |
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553 ... locale='fr_FR') |
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554 u'15:30:00 HEC' |
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555 >>> format_time(t, format='full', tzinfo=timezone('US/Eastern'), |
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556 ... locale='en_US') |
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557 u'3:30:00 PM ET' |
29 | 558 |
33 | 559 :param time: the ``time`` or ``datetime`` object; if `None`, the current |
348
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560 time in UTC is used |
16 | 561 :param format: one of "full", "long", "medium", or "short", or a custom |
562 date/time pattern | |
29 | 563 :param tzinfo: the time-zone to apply to the time for display |
19
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564 :param locale: a `Locale` object or a locale identifier |
1 | 565 :rtype: `unicode` |
19
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566 |
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567 :note: If the pattern contains date fields, an `AttributeError` will be |
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568 raised when trying to apply the formatting. This is also true if |
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569 the value of ``time`` parameter is actually a ``datetime`` object, |
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570 as this function automatically converts that to a ``time``. |
1 | 571 """ |
33 | 572 if time is None: |
348
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573 time = datetime.utcnow() |
33 | 574 elif isinstance(time, (int, long)): |
348
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575 time = datetime.utcfromtimestamp(time) |
29 | 576 if time.tzinfo is None: |
34 | 577 time = time.replace(tzinfo=UTC) |
348
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578 if isinstance(time, datetime): |
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579 if tzinfo is not None: |
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580 time = time.astimezone(tzinfo) |
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581 if hasattr(tzinfo, 'localize'): # pytz |
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582 time = tzinfo.normalize(time) |
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583 time = time.timetz() |
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584 elif tzinfo is not None: |
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585 time = time.replace(tzinfo=tzinfo) |
34 | 586 |
1 | 587 locale = Locale.parse(locale) |
588 if format in ('full', 'long', 'medium', 'short'): | |
589 format = get_time_format(format, locale=locale) | |
590 return parse_pattern(format).apply(time, locale) | |
591 | |
592 def parse_date(string, locale=LC_TIME): | |
38
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593 """Parse a date from a string. |
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594 |
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595 This function uses the date format for the locale as a hint to determine |
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596 the order in which the date fields appear in the string. |
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|
597 |
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598 >>> parse_date('4/1/04', locale='en_US') |
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599 datetime.date(2004, 4, 1) |
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diff
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|
600 >>> parse_date('01.04.2004', locale='de_DE') |
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34
diff
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601 datetime.date(2004, 4, 1) |
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cmlenz
parents:
34
diff
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|
602 |
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parents:
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diff
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|
603 :param string: the string containing the date |
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diff
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|
604 :param locale: a `Locale` object or a locale identifier |
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34
diff
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|
605 :return: the parsed date |
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parents:
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diff
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|
606 :rtype: `date` |
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Started implementation of datetime parsing, using a very basic approach for now.
cmlenz
parents:
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607 """ |
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parents:
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diff
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|
608 # TODO: try ISO format first? |
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609 format = get_date_format(locale=locale).pattern.lower() |
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610 year_idx = format.index('y') |
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611 month_idx = format.index('m') |
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612 if month_idx < 0: |
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613 month_idx = format.index('l') |
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614 day_idx = format.index('d') |
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615 |
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616 indexes = [(year_idx, 'Y'), (month_idx, 'M'), (day_idx, 'D')] |
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617 indexes.sort() |
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618 indexes = dict([(item[1], idx) for idx, item in enumerate(indexes)]) |
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619 |
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diff
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620 # FIXME: this currently only supports numbers, but should also support month |
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621 # names, both in the requested locale, and english |
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622 |
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|
623 numbers = re.findall('(\d+)', string) |
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diff
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624 year = numbers[indexes['Y']] |
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parents:
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diff
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|
625 if len(year) == 2: |
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|
626 year = 2000 + int(year) |
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627 else: |
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628 year = int(year) |
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629 month = int(numbers[indexes['M']]) |
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630 day = int(numbers[indexes['D']]) |
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631 if month > 12: |
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632 month, day = day, month |
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633 return date(year, month, day) |
1 | 634 |
635 def parse_datetime(string, locale=LC_TIME): | |
46 | 636 """Parse a date and time from a string. |
637 | |
638 This function uses the date and time formats for the locale as a hint to | |
639 determine the order in which the time fields appear in the string. | |
640 | |
641 :param string: the string containing the date and time | |
642 :param locale: a `Locale` object or a locale identifier | |
643 :return: the parsed date/time | |
644 :rtype: `datetime` | |
645 """ | |
1 | 646 raise NotImplementedError |
647 | |
648 def parse_time(string, locale=LC_TIME): | |
46 | 649 """Parse a time from a string. |
38
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650 |
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diff
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|
651 This function uses the time format for the locale as a hint to determine |
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652 the order in which the time fields appear in the string. |
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|
653 |
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diff
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|
654 >>> parse_time('15:30:00', locale='en_US') |
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655 datetime.time(15, 30) |
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diff
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|
656 |
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cmlenz
parents:
34
diff
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|
657 :param string: the string containing the time |
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658 :param locale: a `Locale` object or a locale identifier |
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diff
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659 :return: the parsed time |
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|
660 :rtype: `time` |
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parents:
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diff
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|
661 """ |
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diff
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|
662 # TODO: try ISO format first? |
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|
663 format = get_time_format(locale=locale).pattern.lower() |
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|
664 hour_idx = format.index('h') |
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34
diff
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|
665 if hour_idx < 0: |
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diff
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|
666 hour_idx = format.index('k') |
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diff
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|
667 min_idx = format.index('m') |
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diff
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|
668 sec_idx = format.index('s') |
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diff
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|
669 |
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670 indexes = [(hour_idx, 'H'), (min_idx, 'M'), (sec_idx, 'S')] |
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671 indexes.sort() |
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672 indexes = dict([(item[1], idx) for idx, item in enumerate(indexes)]) |
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|
673 |
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cmlenz
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34
diff
changeset
|
674 # FIXME: support 12 hour clock, and 0-based hour specification |
46 | 675 # and seconds should be optional, maybe minutes too |
676 # oh, and time-zones, of course | |
38
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34
diff
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|
677 |
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diff
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|
678 numbers = re.findall('(\d+)', string) |
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|
679 hour = int(numbers[indexes['H']]) |
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diff
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|
680 minute = int(numbers[indexes['M']]) |
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Started implementation of datetime parsing, using a very basic approach for now.
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|
681 second = int(numbers[indexes['S']]) |
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|
682 return time(hour, minute, second) |
1 | 683 |
684 | |
12
a2c54ef107c2
* Removed pkg_resources/setuptools requirement from various places.
cmlenz
parents:
8
diff
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|
685 class DateTimePattern(object): |
1 | 686 |
687 def __init__(self, pattern, format): | |
688 self.pattern = pattern | |
689 self.format = format | |
690 | |
691 def __repr__(self): | |
692 return '<%s %r>' % (type(self).__name__, self.pattern) | |
693 | |
694 def __unicode__(self): | |
695 return self.pattern | |
696 | |
697 def __mod__(self, other): | |
698 assert type(other) is DateTimeFormat | |
699 return self.format % other | |
700 | |
701 def apply(self, datetime, locale): | |
702 return self % DateTimeFormat(datetime, locale) | |
703 | |
704 | |
705 class DateTimeFormat(object): | |
706 | |
707 def __init__(self, value, locale): | |
708 assert isinstance(value, (date, datetime, time)) | |
29 | 709 if isinstance(value, (datetime, time)) and value.tzinfo is None: |
710 value = value.replace(tzinfo=UTC) | |
1 | 711 self.value = value |
712 self.locale = Locale.parse(locale) | |
713 | |
714 def __getitem__(self, name): | |
15 | 715 char = name[0] |
716 num = len(name) | |
717 if char == 'G': | |
718 return self.format_era(char, num) | |
215
d37628e752c4
Dummy/stub implementation for week-in-year and week-in-month date format fields. Also, treat extended year the same as the regular year field, not even ICU seems to handle it specially.
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diff
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|
719 elif char in ('y', 'Y', 'u'): |
15 | 720 return self.format_year(char, num) |
721 elif char in ('Q', 'q'): | |
722 return self.format_quarter(char, num) | |
723 elif char in ('M', 'L'): | |
724 return self.format_month(char, num) | |
215
d37628e752c4
Dummy/stub implementation for week-in-year and week-in-month date format fields. Also, treat extended year the same as the regular year field, not even ICU seems to handle it specially.
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|
725 elif char in ('w', 'W'): |
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Dummy/stub implementation for week-in-year and week-in-month date format fields. Also, treat extended year the same as the regular year field, not even ICU seems to handle it specially.
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726 return self.format_week(char, num) |
15 | 727 elif char == 'd': |
728 return self.format(self.value.day, num) | |
221
898b9450f274
Implement day-of-year date format field. Closes #49.
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217
diff
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|
729 elif char == 'D': |
898b9450f274
Implement day-of-year date format field. Closes #49.
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217
diff
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|
730 return self.format_day_of_year(num) |
241
9fedbb6f9871
Implement day-of-week-in-month field in date formatting. Closes #50.
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240
diff
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|
731 elif char == 'F': |
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Implement day-of-week-in-month field in date formatting. Closes #50.
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diff
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732 return self.format_day_of_week_in_month() |
15 | 733 elif char in ('E', 'e', 'c'): |
734 return self.format_weekday(char, num) | |
735 elif char == 'a': | |
736 return self.format_period(char) | |
737 elif char == 'h': | |
273 | 738 if self.value.hour % 12 == 0: |
739 return self.format(12, num) | |
740 else: | |
741 return self.format(self.value.hour % 12, num) | |
15 | 742 elif char == 'H': |
743 return self.format(self.value.hour, num) | |
18
77a68f88f6bc
Started documentation for date formatting, plus some code tweaks in that area.
cmlenz
parents:
16
diff
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|
744 elif char == 'K': |
273 | 745 return self.format(self.value.hour % 12, num) |
18
77a68f88f6bc
Started documentation for date formatting, plus some code tweaks in that area.
cmlenz
parents:
16
diff
changeset
|
746 elif char == 'k': |
273 | 747 if self.value.hour == 0: |
748 return self.format(24, num) | |
749 else: | |
274 | 750 return self.format(self.value.hour, num) |
15 | 751 elif char == 'm': |
752 return self.format(self.value.minute, num) | |
753 elif char == 's': | |
754 return self.format(self.value.second, num) | |
216
1f3c3924b1b5
Support for fractional seconds field in date formatting. Closes #47.
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215
diff
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|
755 elif char == 'S': |
217 | 756 return self.format_frac_seconds(num) |
757 elif char == 'A': | |
758 return self.format_milliseconds_in_day(num) | |
233
bc22f5aef216
Upgraded to CLDR 1.5 and improved timezone formatting.
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parents:
221
diff
changeset
|
759 elif char in ('z', 'Z', 'v', 'V'): |
29 | 760 return self.format_timezone(char, num) |
1 | 761 else: |
15 | 762 raise KeyError('Unsupported date/time field %r' % char) |
1 | 763 |
15 | 764 def format_era(self, char, num): |
1 | 765 width = {3: 'abbreviated', 4: 'wide', 5: 'narrow'}[max(3, num)] |
766 era = int(self.value.year >= 0) | |
767 return get_era_names(width, self.locale)[era] | |
768 | |
15 | 769 def format_year(self, char, num): |
242
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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770 value = self.value.year |
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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241
diff
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|
771 if char.isupper(): |
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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diff
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|
772 week = self.get_week_number(self.get_day_of_year()) |
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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241
diff
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|
773 if week == 0: |
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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241
diff
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|
774 value -= 1 |
1 | 775 year = self.format(value, num) |
776 if num == 2: | |
777 year = year[-2:] | |
778 return year | |
779 | |
15 | 780 def format_month(self, char, num): |
1 | 781 if num <= 2: |
782 return ('%%0%dd' % num) % self.value.month | |
783 width = {3: 'abbreviated', 4: 'wide', 5: 'narrow'}[num] | |
344
4cba69c7d4bf
Fix for incorrect month context lookup in date formatting. Closes #75. Thanks to Andrew Stromnov for reporting the problem and providing a patch.
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parents:
325
diff
changeset
|
784 context = {'M': 'format', 'L': 'stand-alone'}[char] |
1 | 785 return get_month_names(width, context, self.locale)[self.value.month] |
786 | |
215
d37628e752c4
Dummy/stub implementation for week-in-year and week-in-month date format fields. Also, treat extended year the same as the regular year field, not even ICU seems to handle it specially.
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diff
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|
787 def format_week(self, char, num): |
239 | 788 if char.islower(): # week of year |
242
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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diff
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|
789 day_of_year = self.get_day_of_year() |
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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241
diff
changeset
|
790 week = self.get_week_number(day_of_year) |
240 | 791 if week == 0: |
242
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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241
diff
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|
792 date = self.value - timedelta(days=day_of_year) |
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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241
diff
changeset
|
793 week = self.get_week_number(self.get_day_of_year(date), |
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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241
diff
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|
794 date.weekday()) |
240 | 795 return self.format(week, num) |
239 | 796 else: # week of month |
240 | 797 week = self.get_week_number(self.value.day) |
798 if week == 0: | |
242
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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241
diff
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|
799 date = self.value - timedelta(days=self.value.day) |
059b74719f6b
Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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diff
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|
800 week = self.get_week_number(date.day, date.weekday()) |
240 | 801 pass |
802 return '%d' % week | |
215
d37628e752c4
Dummy/stub implementation for week-in-year and week-in-month date format fields. Also, treat extended year the same as the regular year field, not even ICU seems to handle it specially.
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803 |
15 | 804 def format_weekday(self, char, num): |
805 if num < 3: | |
806 if char.islower(): | |
807 value = 7 - self.locale.first_week_day + self.value.weekday() | |
808 return self.format(value % 7 + 1, num) | |
809 num = 3 | |
810 weekday = self.value.weekday() | |
811 width = {3: 'abbreviated', 4: 'wide', 5: 'narrow'}[num] | |
812 context = {3: 'format', 4: 'format', 5: 'stand-alone'}[num] | |
1 | 813 return get_day_names(width, context, self.locale)[weekday] |
814 | |
221
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Implement day-of-year date format field. Closes #49.
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815 def format_day_of_year(self, num): |
239 | 816 return self.format(self.get_day_of_year(), num) |
221
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817 |
241
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Implement day-of-week-in-month field in date formatting. Closes #50.
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818 def format_day_of_week_in_month(self): |
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819 return '%d' % ((self.value.day - 1) / 7 + 1) |
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820 |
15 | 821 def format_period(self, char): |
273 | 822 period = {0: 'am', 1: 'pm'}[int(self.value.hour >= 12)] |
1 | 823 return get_period_names(locale=self.locale)[period] |
824 | |
217 | 825 def format_frac_seconds(self, num): |
216
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Support for fractional seconds field in date formatting. Closes #47.
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826 value = str(self.value.microsecond) |
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Support for fractional seconds field in date formatting. Closes #47.
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827 return self.format(round(float('.%s' % value), num) * 10**num, num) |
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Support for fractional seconds field in date formatting. Closes #47.
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828 |
217 | 829 def format_milliseconds_in_day(self, num): |
830 msecs = self.value.microsecond // 1000 + self.value.second * 1000 + \ | |
831 self.value.minute * 60000 + self.value.hour * 3600000 | |
832 return self.format(msecs, num) | |
833 | |
29 | 834 def format_timezone(self, char, num): |
233
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835 width = {3: 'short', 4: 'long'}[max(3, num)] |
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836 if char == 'z': |
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837 return get_timezone_name(self.value, width, locale=self.locale) |
29 | 838 elif char == 'Z': |
247
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`get_timezone_gmt()` wasn't getting the locale passed in all cases, which led to test errors when the default locale wasn't configured via environment variables.
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839 return get_timezone_gmt(self.value, width, locale=self.locale) |
233
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840 elif char == 'v': |
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841 return get_timezone_name(self.value.tzinfo, width, |
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842 locale=self.locale) |
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843 elif char == 'V': |
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844 if num == 1: |
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845 return get_timezone_name(self.value.tzinfo, width, |
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846 uncommon=True, locale=self.locale) |
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847 return get_timezone_location(self.value.tzinfo, locale=self.locale) |
29 | 848 |
1 | 849 def format(self, value, length): |
850 return ('%%0%dd' % length) % value | |
851 | |
242
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Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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852 def get_day_of_year(self, date=None): |
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853 if date is None: |
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854 date = self.value |
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Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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855 return (date - date_(date.year, 1, 1)).days + 1 |
239 | 856 |
242
059b74719f6b
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857 def get_week_number(self, day_of_period, day_of_week=None): |
239 | 858 """Return the number of the week of a day within a period. This may be |
859 the week number in a year or the week number in a month. | |
860 | |
861 Usually this will return a value equal to or greater than 1, but if the | |
862 first week of the period is so short that it actually counts as the last | |
863 week of the previous period, this function will return 0. | |
864 | |
865 >>> format = DateTimeFormat(date(2006, 1, 8), Locale.parse('de_DE')) | |
866 >>> format.get_week_number(6) | |
867 1 | |
868 | |
869 >>> format = DateTimeFormat(date(2006, 1, 8), Locale.parse('en_US')) | |
870 >>> format.get_week_number(6) | |
871 2 | |
872 | |
873 :param day_of_period: the number of the day in the period (usually | |
874 either the day of month or the day of year) | |
242
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875 :param day_of_week: the week day; if ommitted, the week day of the |
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Finish implementation of day-of-year and day-of-month for now, and fix implementation of year-of-week-of-year field. Closes #46. I suspect there are still cases not entirely covered by this implementation, but those can be filed as separate tickets.
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876 current date is assumed |
239 | 877 """ |
242
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878 if day_of_week is None: |
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879 day_of_week = self.value.weekday() |
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880 first_day = (day_of_week - self.locale.first_week_day - |
239 | 881 day_of_period + 1) % 7 |
882 if first_day < 0: | |
883 first_day += 7 | |
884 week_number = (day_of_period + first_day - 1) / 7 | |
885 if 7 - first_day >= self.locale.min_week_days: | |
886 week_number += 1 | |
887 return week_number | |
888 | |
1 | 889 |
890 PATTERN_CHARS = { | |
15 | 891 'G': [1, 2, 3, 4, 5], # era |
892 'y': None, 'Y': None, 'u': None, # year | |
893 'Q': [1, 2, 3, 4], 'q': [1, 2, 3, 4], # quarter | |
894 'M': [1, 2, 3, 4, 5], 'L': [1, 2, 3, 4, 5], # month | |
895 'w': [1, 2], 'W': [1], # week | |
896 'd': [1, 2], 'D': [1, 2, 3], 'F': [1], 'g': None, # day | |
897 'E': [1, 2, 3, 4, 5], 'e': [1, 2, 3, 4, 5], 'c': [1, 3, 4, 5], # week day | |
898 'a': [1], # period | |
899 'h': [1, 2], 'H': [1, 2], 'K': [1, 2], 'k': [1, 2], # hour | |
900 'm': [1, 2], # minute | |
901 's': [1, 2], 'S': None, 'A': None, # second | |
233
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902 'z': [1, 2, 3, 4], 'Z': [1, 2, 3, 4], 'v': [1, 4], 'V': [1, 4] # zone |
1 | 903 } |
904 | |
905 def parse_pattern(pattern): | |
906 """Parse date, time, and datetime format patterns. | |
907 | |
908 >>> parse_pattern("MMMMd").format | |
909 u'%(MMMM)s%(d)s' | |
910 >>> parse_pattern("MMM d, yyyy").format | |
911 u'%(MMM)s %(d)s, %(yyyy)s' | |
16 | 912 |
913 Pattern can contain literal strings in single quotes: | |
914 | |
1 | 915 >>> parse_pattern("H:mm' Uhr 'z").format |
916 u'%(H)s:%(mm)s Uhr %(z)s' | |
917 | |
16 | 918 An actual single quote can be used by using two adjacent single quote |
919 characters: | |
920 | |
921 >>> parse_pattern("hh' o''clock'").format | |
922 u"%(hh)s o'clock" | |
923 | |
1 | 924 :param pattern: the formatting pattern to parse |
925 """ | |
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926 if type(pattern) is DateTimePattern: |
1 | 927 return pattern |
928 | |
929 result = [] | |
930 quotebuf = None | |
931 charbuf = [] | |
932 fieldchar = [''] | |
933 fieldnum = [0] | |
934 | |
935 def append_chars(): | |
936 result.append(''.join(charbuf).replace('%', '%%')) | |
937 del charbuf[:] | |
938 | |
939 def append_field(): | |
940 limit = PATTERN_CHARS[fieldchar[0]] | |
15 | 941 if limit and fieldnum[0] not in limit: |
1 | 942 raise ValueError('Invalid length for field: %r' |
943 % (fieldchar[0] * fieldnum[0])) | |
944 result.append('%%(%s)s' % (fieldchar[0] * fieldnum[0])) | |
945 fieldchar[0] = '' | |
946 fieldnum[0] = 0 | |
947 | |
16 | 948 for idx, char in enumerate(pattern.replace("''", '\0')): |
1 | 949 if quotebuf is None: |
950 if char == "'": # quote started | |
951 if fieldchar[0]: | |
952 append_field() | |
953 elif charbuf: | |
954 append_chars() | |
955 quotebuf = [] | |
956 elif char in PATTERN_CHARS: | |
957 if charbuf: | |
958 append_chars() | |
959 if char == fieldchar[0]: | |
960 fieldnum[0] += 1 | |
961 else: | |
962 if fieldchar[0]: | |
963 append_field() | |
964 fieldchar[0] = char | |
965 fieldnum[0] = 1 | |
966 else: | |
967 if fieldchar[0]: | |
968 append_field() | |
969 charbuf.append(char) | |
970 | |
971 elif quotebuf is not None: | |
16 | 972 if char == "'": # end of quote |
1 | 973 charbuf.extend(quotebuf) |
974 quotebuf = None | |
975 else: # inside quote | |
976 quotebuf.append(char) | |
977 | |
978 if fieldchar[0]: | |
979 append_field() | |
980 elif charbuf: | |
981 append_chars() | |
982 | |
16 | 983 return DateTimePattern(pattern, u''.join(result).replace('\0', "'")) |