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                [toc] ## 編碼與亂碼 ### Python2編碼 內存中字符默認編碼是ASCI,默認文件編碼亦是ASCII; 讀到內存后py2解釋器不會進行編碼轉換; python 2中的unicode是一個單獨的類型,用u'路飛'來表示; python 2 str == bytes,bytes直接是按字符編碼存成的2進制格式在內存里. ### Python3編碼 內存中字符串都是unicode,默認文件編碼是utf-8; 讀到內存會被py3解釋器自動轉成unicode; bytes與str做了明確區分; 所有的unicode字符編碼后都會變成bytes格式. ### 解碼與編碼 Py3 自動把文件編碼轉為unicode是調用了decode(解碼) 和encode(編碼) 方法 UTF-8 --> decode 解碼 --> Unicode Unicode --> encode 編碼 --> GBK / UTF-8 ### 圖解 日本編碼一解碼(decode)-> unicode-編碼(encode)--> gbk ![編解碼圖解](http://static.zybuluo.com/agocan/02jb3tzxtlzp4rj5faxj4rs5/image_1c1mttu8ke1a1eju19cm191f1mhd4k.png) Python只要出現各種編碼問題,無非是哪里的編碼設置出錯了 ### 常見編碼錯誤的原因有: * Python解釋器的默認編碼 * Python源文件文件編碼 * Terminal使用的編碼 * 操作系統的語言設置
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