--- a/genshi/core.py
+++ b/genshi/core.py
@@ -316,6 +316,12 @@
                 return True
 
     def __getslice__(self, i, j):
+        """Return a slice of the attributes list.
+        
+        >>> attrs = Attrs([('href', '#'), ('title', 'Foo')])
+        >>> attrs[1:]
+        Attrs([('title', 'Foo')])
+        """
         return Attrs(tuple.__getslice__(self, i, j))
 
     def __or__(self, attrs):

--- a/genshi/filters/tests/__init__.py
+++ b/genshi/filters/tests/__init__.py
@@ -11,7 +11,6 @@
 # individuals. For the exact contribution history, see the revision
 # history and logs, available at http://genshi.edgewall.org/log/.
 
-import doctest
 import unittest
 
 def suite():

--- a/genshi/path.py
+++ b/genshi/path.py
@@ -39,6 +39,7 @@
 """
 
 from math import ceil, floor
+import operator
 import re
 
 from genshi.core import Stream, Attrs, Namespace, QName
@@ -771,7 +772,7 @@
         string2 = as_string(self.string2(kind, data, pos, namespaces, variables))
         return re.search(string2, string1, self.flags)
     def _map_flags(self, flags):
-        return reduce(lambda a, b: a | b,
+        return reduce(operator.or_,
                       [self.flag_map[flag] for flag in flags], re.U)
     def __repr__(self):
         return 'contains(%r, %r)' % (self.string1, self.string2)