1 """ List all available codec modules.

     2 

     3 (c) Copyright 2005, Marc-Andre Lemburg (mal@lemburg.com).

     4 

     5     Licensed to PSF under a Contributor Agreement.

     6 

     7 """

     8 

     9 import os, codecs, encodings

    10 

    11 _debug = 0

    12 

    13 def listcodecs(dir):

    14     names = []

    15     for filename in os.listdir(dir):

    16         if filename[-3:] != '.py':

    17             continue

    18         name = filename[:-3]

    19         # Check whether we've found a true codec

    20         try:

    21             codecs.lookup(name)

    22         except LookupError:

    23             # Codec not found

    24             continue

    25         except Exception, reason:

    26             # Probably an error from importing the codec; still it's

    27             # a valid code name

    28             if _debug:

    29                 print '* problem importing codec %r: %s' % \

    30                       (name, reason)

    31         names.append(name)

    32     return names

    33 

    34 

    35 if __name__ == '__main__':

    36     names = listcodecs(encodings.__path__[0])

    37     names.sort()

    38     print 'all_codecs = ['

    39     for name in names:

    40         print '    %r,' % name

    41     print ']'