# HG changeset patch
# User palgarvio
# Date 1229994779 0
# Node ID e24e6a4d351285088136678ecc3182531f5503fc
# Parent  fb926f48efbaf40789acf826ed80dc27c9505769
Use a more explicit error message if no option or argument(command) is passed to `pybabel`. Fixes #81.

diff --git a/babel/messages/frontend.py b/babel/messages/frontend.py
--- a/babel/messages/frontend.py
+++ b/babel/messages/frontend.py
@@ -648,7 +648,8 @@
             return 0
 
         if not args:
-            self.parser.error('incorrect number of arguments')
+            self.parser.error('no valid command or option passed. '
+                              'Try the -h/--help option for more information.')
 
         cmdname = args[0]
         if cmdname not in self.commands:
diff --git a/babel/messages/tests/frontend.py b/babel/messages/tests/frontend.py
--- a/babel/messages/tests/frontend.py
+++ b/babel/messages/tests/frontend.py
@@ -529,7 +529,7 @@
             self.assertEqual("""\
 usage: pybabel command [options] [args]
 
-pybabel: error: incorrect number of arguments
+pybabel: error: no valid command or option passed. try the -h/--help option for more information.
 """, sys.stderr.getvalue().lower())
 
     def test_help(self):