python base64codec codec base64 content transfer encoding this codec deencodes from bytes to bytes written by marcandre lemburg mallemburg com codec apis encodings module api codec apis encodings module api
import codecs
import base64



def base64_encode(input, errors='strict'):
    assert errors == 'strict'
    return (base64.encodebytes(input), len(input))

def base64_decode(input, errors='strict'):
    assert errors == 'strict'
    return (base64.decodebytes(input), len(input))

class Codec(codecs.Codec):
    def encode(self, input, errors='strict'):
        return base64_encode(input, errors)
    def decode(self, input, errors='strict'):
        return base64_decode(input, errors)

class IncrementalEncoder(codecs.IncrementalEncoder):
    def encode(self, input, final=False):
        assert self.errors == 'strict'
        return base64.encodebytes(input)

class IncrementalDecoder(codecs.IncrementalDecoder):
    def decode(self, input, final=False):
        assert self.errors == 'strict'
        return base64.decodebytes(input)

class StreamWriter(Codec, codecs.StreamWriter):
    charbuffertype = bytes

class StreamReader(Codec, codecs.StreamReader):
    charbuffertype = bytes



def getregentry():
    return codecs.CodecInfo(
        name='base64',
        encode=base64_encode,
        decode=base64_decode,
        incrementalencoder=IncrementalEncoder,
        incrementaldecoder=IncrementalDecoder,
        streamwriter=StreamWriter,
        streamreader=StreamReader,
        _is_text_encoding=False,
    )