--- gettext.py.orig	2007-02-07 16:32:42.000000000 -0800
+++ gettext.py	2007-02-07 16:48:43.000000000 -0800
@@ -418,8 +418,12 @@
 
 
 # Locate a .mo file using the gettext strategy
-def find(domain, localedir=None, languages=None, all=0):
+def find(domain, localedir=None, languages=None, all=0, exists=None):
     # Get some reasonable defaults for arguments that were not supplied
+    #
+    # "exists" is a callback that takes a mofile and returns True if it
+    # actually exists.  You only need to pass something if your
+    # translation catalogs don't exist in the filesystem like normal.
     if localedir is None:
         localedir = _default_localedir
     if languages is None:
@@ -431,6 +435,8 @@
                 break
         if 'C' not in languages:
             languages.append('C')
+    if exists is None:
+        exists = os.path.exists
     # now normalize and expand the languages
     nelangs = []
     for lang in languages:
@@ -446,7 +452,7 @@
         if lang == 'C':
             break
         mofile = os.path.join(localedir, lang, 'LC_MESSAGES', '%s.mo' % domain)
-        if os.path.exists(mofile):
+        if exists(mofile):
             if all:
                 result.append(mofile)
             else:
@@ -454,7 +460,6 @@
     return result
 
 
-
 # a mapping between absolute .mo file path and Translation object
 _translations = {}