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📄 ascii.py(1.22 KB)
📄 base64_codec.py(1.5 KB)
📄 big5.py(1019 B)
📄 big5hkscs.py(1.01 KB)
📄 bz2_codec.py(2.2 KB)
📄 charmap.py(2.04 KB)
📄 cp037.pyc(3.31 KB)
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📄 cp1026.pyc(3.31 KB)
📄 cp1125.py(33.79 KB)
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📄 cp932.py(1023 B)
📄 cp949.py(1023 B)
📄 cp950.py(1023 B)
📄 euc_jis_2004.py(1.03 KB)
📄 euc_jisx0213.py(1.03 KB)
📄 euc_jp.py(1 KB)
📄 euc_kr.py(1 KB)
📄 gb18030.py(1.01 KB)
📄 gb2312.py(1 KB)
📄 gbk.py(1015 B)
📄 hex_codec.py(1.47 KB)
📄 hp_roman8.pyc(3.5 KB)
📄 hz.py(1011 B)
📄 idna.py(8.88 KB)
📄 iso2022_jp.py(1.03 KB)
📄 iso2022_jp_1.py(1.04 KB)
📄 iso2022_jp_2.py(1.04 KB)
📄 iso2022_jp_2004.py(1.05 KB)
📄 iso2022_jp_3.py(1.04 KB)
📄 iso2022_jp_ext.py(1.04 KB)
📄 iso2022_kr.py(1.03 KB)
📄 iso8859_1.pyc(3.31 KB)
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📄 iso8859_8.pyc(3.34 KB)
📄 iso8859_9.pyc(3.31 KB)
📄 johab.py(1023 B)
📄 koi8_r.pyc(3.36 KB)
📄 koi8_t.py(12.88 KB)
📄 koi8_u.pyc(3.34 KB)
📄 kz1048.pyc(3.32 KB)
📄 latin_1.py(1.23 KB)
📄 mac_arabic.pyc(13.45 KB)
📄 mac_croatian.pyc(3.35 KB)
📄 mac_cyrillic.pyc(3.34 KB)
📄 mac_farsi.pyc(3.29 KB)
📄 mac_greek.pyc(3.33 KB)
📄 mac_iceland.pyc(3.34 KB)
📄 mac_latin2.pyc(3.48 KB)
📄 mac_roman.pyc(3.34 KB)
📄 mac_romanian.pyc(3.35 KB)
📄 mac_turkish.pyc(3.35 KB)
📄 mbcs.py(1.18 KB)
📄 oem.py(1019 B)
📄 palmos.py(13.2 KB)
📄 ptcp154.pyc(3.42 KB)
📄 punycode.py(6.72 KB)
📄 quopri_codec.py(1.49 KB)
📄 raw_unicode_escape.py(1.3 KB)
📄 rot_13.py(2.39 KB)
📄 shift_jis.py(1.01 KB)
📄 shift_jis_2004.py(1.03 KB)
📄 shift_jisx0213.py(1.03 KB)
📄 tis_620.pyc(3.39 KB)
📄 undefined.py(1.27 KB)
📄 unicode_escape.py(1.27 KB)
📄 utf_16.py(5.11 KB)
📄 utf_16_be.py(1.01 KB)
📄 utf_16_le.py(1.01 KB)
📄 utf_32.py(5.01 KB)
📄 utf_32_be.py(930 B)
📄 utf_32_le.py(930 B)
📄 utf_7.py(946 B)
📄 utf_8.py(1005 B)
📄 utf_8_sig.py(4.04 KB)
📄 uu_codec.py(2.78 KB)
📄 zlib_codec.py(2.15 KB)

Editing: utf_8_sig.py

""" Python 'utf-8-sig' Codec
This work similar to UTF-8 with the following changes:

* On encoding/writing a UTF-8 encoded BOM will be prepended/written as the
  first three bytes.

* On decoding/reading if the first three bytes are a UTF-8 encoded BOM, these
  bytes will be skipped.
"""
import codecs

### Codec APIs

def encode(input, errors='strict'):
    return (codecs.BOM_UTF8 + codecs.utf_8_encode(input, errors)[0],
            len(input))

def decode(input, errors='strict'):
    prefix = 0
    if input[:3] == codecs.BOM_UTF8:
        input = input[3:]
        prefix = 3
    (output, consumed) = codecs.utf_8_decode(input, errors, True)
    return (output, consumed+prefix)

class IncrementalEncoder(codecs.IncrementalEncoder):
    def __init__(self, errors='strict'):
        codecs.IncrementalEncoder.__init__(self, errors)
        self.first = 1

def encode(self, input, final=False):
        if self.first:
            self.first = 0
            return codecs.BOM_UTF8 + \
                   codecs.utf_8_encode(input, self.errors)[0]
        else:
            return codecs.utf_8_encode(input, self.errors)[0]

def reset(self):
        codecs.IncrementalEncoder.reset(self)
        self.first = 1

def getstate(self):
        return self.first

def setstate(self, state):
        self.first = state

class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
    def __init__(self, errors='strict'):
        codecs.BufferedIncrementalDecoder.__init__(self, errors)
        self.first = 1

def _buffer_decode(self, input, errors, final):
        if self.first:
            if len(input) < 3:
                if codecs.BOM_UTF8.startswith(input):
                    # not enough data to decide if this really is a BOM
                    # => try again on the next call
                    return ("", 0)
                else:
                    self.first = 0
            else:
                self.first = 0
                if input[:3] == codecs.BOM_UTF8:
                    (output, consumed) = \
                       codecs.utf_8_decode(input[3:], errors, final)
                    return (output, consumed+3)
        return codecs.utf_8_decode(input, errors, final)

def reset(self):
        codecs.BufferedIncrementalDecoder.reset(self)
        self.first = 1

def getstate(self):
        state = codecs.BufferedIncrementalDecoder.getstate(self)
        # state[1] must be 0 here, as it isn't passed along to the caller
        return (state[0], self.first)

def setstate(self, state):
        # state[1] will be ignored by BufferedIncrementalDecoder.setstate()
        codecs.BufferedIncrementalDecoder.setstate(self, state)
        self.first = state[1]

class StreamWriter(codecs.StreamWriter):
    def reset(self):
        codecs.StreamWriter.reset(self)
        try:
            del self.encode
        except AttributeError:
            pass

def encode(self, input, errors='strict'):
        self.encode = codecs.utf_8_encode
        return encode(input, errors)

class StreamReader(codecs.StreamReader):
    def reset(self):
        codecs.StreamReader.reset(self)
        try:
            del self.decode
        except AttributeError:
            pass

def decode(self, input, errors='strict'):
        if len(input) < 3:
            if codecs.BOM_UTF8.startswith(input):
                # not enough data to decide if this is a BOM
                # => try again on the next call
                return ("", 0)
        elif input[:3] == codecs.BOM_UTF8:
            self.decode = codecs.utf_8_decode
            (output, consumed) = codecs.utf_8_decode(input[3:],errors)
            return (output, consumed+3)
        # (else) no BOM present
        self.decode = codecs.utf_8_decode
        return codecs.utf_8_decode(input, errors)

### encodings module API

def getregentry():
    return codecs.CodecInfo(
        name='utf-8-sig',
        encode=encode,
        decode=decode,
        incrementalencoder=IncrementalEncoder,
        incrementaldecoder=IncrementalDecoder,
        streamreader=StreamReader,
        streamwriter=StreamWriter,
    )

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Editing: utf_8_sig.py

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