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PythonµÄASCII, GB2312, Unicode , UTF-8
ASCII ÊÇÒ»ÖÖ×Ö·û¼¯,°üÀ¨´óСдµÄÓ¢ÎÄ×Öĸ¡¢Êý×Ö¡¢¿ØÖÆ×Ö·ûµÈ£¬ËüÓÃÒ»¸ö×Ö½Ú±íʾ£¬·¶Î§ÊÇ 0-127 Unicode·ÖΪUTF-8ºÍUTF-16¡£
UTF-8±ä³¤¶ÈµÄ£¬×î¶à 6 ¸ö×Ö½Ú£¬Ð¡ÓÚ 127 µÄ×Ö·ûÓÃÒ»¸ö×Ö½Ú±íʾ£¬Óë ASCII ×Ö·û¼¯µÄ½á¹ûÒ»Ñù£¬ASCII ±àÂëϵÄÓ¢ÓïÎı¾²»ÐèÒªÐ޸ľͿÉÒÔµ±×÷ UTF-8 ±àÂë½øÐд¦Àí¡£
Python ´Ó 2.2 ¿ªÊ¼Ö§³Ö Unicode £¬º¯Êý decode( char_set )¿ÉÒÔʵÏÖ ÆäËü±àÂëµ½ Unicode µÄת»»£¬º¯Êý encode( char_set )ʵÏÖ Unicode µ½ÆäËü±àÂ뷽ʽµÄת»»¡£
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("ÄãºÃ").decode( "GB2312")
½«µÃµ½
u'\u4f60\u597d'£¬
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(u'\u4f60\u597d').encode("UTF-8")
½«µÃµ½
'\xe4\xbd\xa0\xe5\xa5\xbd'
ËüÊÇ “ÄãºÃ”µÄUTF-8±àÂë½á¹û¡£
pythonÖÐʹÓà unicodeµÄ¹Ø¼ü£ºunicodeÊÇÒ»¸öÀ࣬º¯Êýunicode(str,"utf8")´Óutf8±àÂ루µ±È»Ò²¿ÉÒÔÊDZðµÄ±àÂ룩µÄ×Ö·û´®strÉú³É unicodeÀàµÄ¶ÔÏ󣬶øº¯Êýunc.encode("utf8")½«unicodeÀàµÄ¶ÔÏóuncת»»Îª£¨±àÂëΪ£©utf8±àÂ루µ±È»Ò²¿ÉÒÔÊDZðµÄ±àÂ룩µÄ×Ö·û´®¡£ÓÚÊÇ£¬±àдunicodeÏà¹Ø³ÌÐò£¬ÐèÒª×öµÄÊÂÇéÊÇ * »ñÈ¡Êý¾Ý£¨×Ö·û´®£©Ê±£¬ÓÃunicode(str, "utf8")Éú³Éunicode¶ÔÏó * ÔÚ³ÌÐòÖнöʹÓÃunicode¶ÔÏ󣬶ԳÌÐòÖгöÏÖµÄ×Ö·û´®³£Á¿¶¼ÒÔu"×Ö·û´®"µÄÐÎʽÊéд * Êä³öʱ£¬¿É½«unicode¶ÔÏóת»»ÎªÈÎÒâ±àÂëÊä³ö£¬Ê¹ÓÃstr.encode("some_encoding")
>>> unicode("ÄãºÃ", "utf8")
       u'\u4f60\u597d'
>>> x = _
>>> type(x)
>>> type("ÄãºÃ")
>>> x.encode("utf8")
       '\xe4\xbd\xa0\xe5\xa5\xbd'
>>> x.encode("gbk")
       '\xc4\xe3\xba\xc3'
>>> x.encode("gb2312")
       '\xc4\xe3\xba\xc3'
>>> print x
       ÄãºÃ
>>> print x.encode("utf8")
       ÄãºÃ
>>> print x.encode("gbk")
       ???
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