python3支持的encoding

 'ascii',
 'big5',
 'big5hkscs',
 'cp037',
 'cp273',
 'cp424',
 'cp437',
 'cp500',
 'cp720',
 'cp737',
 'cp775',
 'cp850',
 'cp852',
 'cp855',
 'cp856',
 'cp857',
 'cp858',
 'cp860',
 'cp861',
 'cp862',
 'cp863',
 'cp864',
 'cp865',
 'cp866',
 'cp869',
 'cp874',
 'cp875',
 'cp932',
 'cp949',
 'cp950',
 'cp1006',
 'cp1026',
 'cp1125',
 'cp1140',
 'cp1250',
 'cp1251',
 'cp1252',
 'cp1253',
 'cp1254',
 'cp1255',
 'cp1256',
 'cp1257',
 'cp1258',
 'cp65001',
 'euc_jp',
 'euc_jis_2004',
 'euc_jisx0213',
 'euc_kr',
 'gb2312',
 'gbk',
 'gb18030',
 'hz',
 'iso2022_jp',
 'iso2022_jp_1',
 'iso2022_jp_2',
 'iso2022_jp_2004',
 'iso2022_jp_3',
 'iso2022_jp_ext',
 'iso2022_kr',
 'latin_1',
 'iso8859_2',
 'iso8859_3',
 'iso8859_4',
 'iso8859_5',
 'iso8859_6',
 'iso8859_7',
 'iso8859_8',
 'iso8859_9',
 'iso8859_10',
 'iso8859_11',
 'iso8859_13',
 'iso8859_14',
 'iso8859_15',
 'iso8859_16',
 'johab',
 'koi8_r',
 'koi8_t',
 'koi8_u',
 'kz1048',
 'mac_cyrillic',
 'mac_greek',
 'mac_iceland',
 'mac_latin2',
 'mac_roman',
 'mac_turkish',
 'ptcp154',
 'shift_jis',
 'shift_jis_2004',
 'shift_jisx0213',
 'utf_32',
 'utf_32_be',
 'utf_32_le',
 'utf_16',
 'utf_16_be',
 'utf_16_le',
 'utf_7',
 'utf_8',
 'utf_8_sig'