3     Standard Python encoding modules are stored in this package
6     Codec modules must have names corresponding to normalized encoding
20     * getaliases() -> sequence of encoding name strings to use as aliases
22     Alias names returned by getaliases() must be normalized encoding
43 def normalize_encoding(encoding):  argument
45     """ Normalize an encoding name.
52         Note that encoding names should be ASCII only.
55     if isinstance(encoding, bytes):
56         encoding = str(encoding, "ascii")
60     for c in encoding:
71 def search_function(encoding):  argument
74     entry = _cache.get(encoding, _unknown)
80     # First try to find an alias for the normalized encoding
85     norm_encoding = normalize_encoding(encoding)
118         _cache[encoding] = None
139     _cache[encoding] = entry
163     def _alias_mbcs(encoding):  argument
167             if encoding == ansi_code_page: