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
9import os, codecs, encodings
10
11_debug = 0
12
13def 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 as 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
35if __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(']')
42