The bz2 codec isn't supported any more. I've also commented out several codecs which were removed in the past.

Lib/encodings/aliases.py

@@ -33,9 +33,9 @@ aliases = {
     'us'                 : 'ascii',
     'us_ascii'           : 'ascii',
 
-    # base64_codec codec
+    ## base64_codec codec
-    'base64'             : 'base64_codec',
+    #'base64'             : 'base64_codec',
-    'base_64'            : 'base64_codec',
+    #'base_64'            : 'base64_codec',
 
     # big5 codec
     'big5_tw'            : 'big5',
@@ -45,8 +45,8 @@ aliases = {
     'big5_hkscs'         : 'big5hkscs',
     'hkscs'              : 'big5hkscs',
 
-    # bz2_codec codec
+    ## bz2_codec codec
-    'bz2'                : 'bz2_codec',
+    #'bz2'                : 'bz2_codec',
 
     # cp037 codec
     '037'                : 'cp037',
@@ -243,8 +243,8 @@ aliases = {
     'cp936'              : 'gbk',
     'ms936'              : 'gbk',
 
-    # hex_codec codec
+    ## hex_codec codec
-    'hex'                : 'hex_codec',
+    #'hex'                : 'hex_codec',
 
     # hp_roman8 codec
     'roman8'             : 'hp_roman8',
@@ -444,13 +444,13 @@ aliases = {
     'cp154'              : 'ptcp154',
     'cyrillic-asian'     : 'ptcp154',
 
-    # quopri_codec codec
+    ## quopri_codec codec
-    'quopri'             : 'quopri_codec',
+    #'quopri'             : 'quopri_codec',
-    'quoted_printable'   : 'quopri_codec',
+    #'quoted_printable'   : 'quopri_codec',
-    'quotedprintable'    : 'quopri_codec',
+    #'quotedprintable'    : 'quopri_codec',
 
-    # rot_13 codec
+    ## rot_13 codec
-    'rot13'              : 'rot_13',
+    #'rot13'              : 'rot_13',
 
     # shift_jis codec
     'csshiftjis'         : 'shift_jis',
@@ -512,11 +512,11 @@ aliases = {
     'utf8_ucs2'          : 'utf_8',
     'utf8_ucs4'          : 'utf_8',
 
-    # uu_codec codec
+    ## uu_codec codec
-    'uu'                 : 'uu_codec',
+    #'uu'                 : 'uu_codec',
 
-    # zlib_codec codec
+    ## zlib_codec codec
-    'zip'                : 'zlib_codec',
+    #'zip'                : 'zlib_codec',
-    'zlib'               : 'zlib_codec',
+    #'zlib'               : 'zlib_codec',
 
 }

Lib/encodings/bz2_codec.py

@@ -1,102 +0,0 @@
-""" Python 'bz2_codec' Codec - bz2 compression encoding
-
-    Unlike most of the other codecs which target Unicode, this codec
-    will return Python string objects for both encode and decode.
-
-    Adapted by Raymond Hettinger from zlib_codec.py which was written
-    by Marc-Andre Lemburg (mal@lemburg.com).
-
-"""
-import codecs
-import bz2 # this codec needs the optional bz2 module !
-
-### Codec APIs
-
-def bz2_encode(input,errors='strict'):
-
-    """ Encodes the object input and returns a tuple (output
-        object, length consumed).
-
-        errors defines the error handling to apply. It defaults to
-        'strict' handling which is the only currently supported
-        error handling for this codec.
-
-    """
-    assert errors == 'strict'
-    output = bz2.compress(input)
-    return (output, len(input))
-
-def bz2_decode(input,errors='strict'):
-
-    """ Decodes the object input and returns a tuple (output
-        object, length consumed).
-
-        input must be an object which provides the bf_getreadbuf
-        buffer slot. Python strings, buffer objects and memory
-        mapped files are examples of objects providing this slot.
-
-        errors defines the error handling to apply. It defaults to
-        'strict' handling which is the only currently supported
-        error handling for this codec.
-
-    """
-    assert errors == 'strict'
-    output = bz2.decompress(input)
-    return (output, len(input))
-
-class Codec(codecs.Codec):
-
-    def encode(self, input, errors='strict'):
-        return bz2_encode(input, errors)
-    def decode(self, input, errors='strict'):
-        return bz2_decode(input, errors)
-
-class IncrementalEncoder(codecs.IncrementalEncoder):
-    def __init__(self, errors='strict'):
-        assert errors == 'strict'
-        self.errors = errors
-        self.compressobj = bz2.BZ2Compressor()
-
-    def encode(self, input, final=False):
-        if final:
-            c = self.compressobj.compress(input)
-            return c + self.compressobj.flush()
-        else:
-            return self.compressobj.compress(input)
-
-    def reset(self):
-        self.compressobj = bz2.BZ2Compressor()
-
-class IncrementalDecoder(codecs.IncrementalDecoder):
-    def __init__(self, errors='strict'):
-        assert errors == 'strict'
-        self.errors = errors
-        self.decompressobj = bz2.BZ2Decompressor()
-
-    def decode(self, input, final=False):
-        try:
-            return self.decompressobj.decompress(input)
-        except EOFError:
-            return ''
-
-    def reset(self):
-        self.decompressobj = bz2.BZ2Decompressor()
-
-class StreamWriter(Codec,codecs.StreamWriter):
-    pass
-
-class StreamReader(Codec,codecs.StreamReader):
-    pass
-
-### encodings module API
-
-def getregentry():
-    return codecs.CodecInfo(
-        name="bz2",
-        encode=bz2_encode,
-        decode=bz2_decode,
-        incrementalencoder=IncrementalEncoder,
-        incrementaldecoder=IncrementalDecoder,
-        streamwriter=StreamWriter,
-        streamreader=StreamReader,
-    )