$ python
Python 2.4.1 (#1, May 16 2005, 15:19:29)
[GCC 4.0.0 20050512 (Red Hat 4.0.0-5)] on linux2
Type "help", "copyright", "credits" or "license" for
more information.
>>> import codecs
>>> codecs.lookup('ascii')
(<built-in function ascii_encode>, <built-in function
ascii_decode>, <class encodings.ascii.StreamReader at
0xb7f1302c>, <class encodings.ascii.StreamWriter at
0xb7f82fbc>)
>>> codecs.lookup('mbcs')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.4/encodings/__init__.py", line
96, in search_function
    globals(), locals(), _import_tail)
  File "/usr/lib/python2.4/encodings/mbcs.py", line 14,
in ?
    class Codec(codecs.Codec):
  File "/usr/lib/python2.4/encodings/mbcs.py", line 18,
in Codec
    encode = codecs.mbcs_encode
AttributeError: 'module' object has no attribute
'mbcs_encode'
>>> codecs.lookup('tactis')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
LookupError: unknown encoding: tactis