1¡µÎªÊ²Ã´ÏÂÃæÓï¾ä»á³ö´í£¿
  a>    a=*u*"ΪʲôÏÂÃæÓï¾ä»á³ö´í"
          b=a.encode('utf-8')
          c=b.encode('utf-16')
-----------------------------------------------------
  b>    a="ΪʲôÏÂÃæÓï¾ä»á³ö´í"
          b=a.encode('utf-8')

2¡µÎªÊ²Ã´bµÄÀàÐÍÊÇ"str"£¬bÔÚת»»¹ý³ÌÖÐÊDz»ÊǶªµôÁËËûµÄÀàÐÍ£¿»òÕß˵"utf-8"ÊÇÈçºÎ·´Ó³³öÀ´µÄ£¿
   a=u"bµÄÀàÐÍ"
   b=a.encode('utf-8')
   print type(b)
½á¹ûÊÇ£ºstr

3¡µÈçºÎµÃµ½Ä¬ÈϱàÂëÀàÐÍ£¿

4¡µencodeÓëdecodeµ½µ×ÊÇÒÔ˭ΪĿ±ê±àÂëµÄ£¿£¿


ÏÈллÀ²¡£
-------------- 下一部分 --------------
Ò»¸öHTML¸½¼þ±»ÒƳý...
URL: http://python.cn/pipermail/python-chinese/attachments/20071028/ce8cfe90/attachment-0001.htm 

在07-10-28，??? ?? <clfff.peter在gmail.com> 写道：
>
> 1〉为什么下面语句会出错？
>   a>    a=u"为什么下面语句会出错"
>           b=a.encode('utf-8')
>           c=b.encode('utf-16')
b 已经是普通字符串了.
> -----------------------------------------------------
>   b>    a="为什么下面语句会出错"
>           b=a.encode('utf-8')
a 不是unicode 字符串.
>
> 2〉为什么b的类型是"str"，b在转换过程中是不是丢掉了他的类型？或者说"utf-8"是如何反映出来的？
>    a=u"b的类型"
>    b=a.encode('utf-8')
>    print type(b)
> 结果是：str
>
b 是按utf-8 编码的普通字符串.
>

>
> 3〉如何得到默认编码类型？

sys.getdefaultencoding()
这个是python 的默认编码.

>
> 4〉encode与decode到底是以谁为目标编码的？？
     encode 是把 unicode 字符串, 转换成对应编码的字符串.
     decode 是相反.
>
> 先谢谢啦。
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to python-chinese-request在lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request在lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>



-- 
Tao Fei (陶飞)
My Blog: blog.filia.cn
My Summer Of Code Blog: filiasoc.blogspot.com

µ«ÊÇ£¬ÏÂÃæÓï¾ä£º

a="ΪʲôÏÂÃæÓï¾ä»á³ö´í"
a.decode('utf-16')
a.decode('utf-8')  #ΪʲôֻÓÐÕâÒ»Ðлá³ö´í£¿
a.decode('big5')
a.decode('gb2312')

»¹ÓУ¬Äã˵£º
    encode ÊÇ°Ñ unicode ×Ö·û´®, ת»»³É¶ÔÓ¦±àÂëµÄ×Ö·û´®.
    decode ÊÇÏà·´.
µ«ÊÇstrºÍunicode¶¼ÓÐdecodeºÍencodeѽ



ÔÚ07-10-28£¬Tao Fei <filia.tao在gmail.com> дµÀ£º
>
> ÔÚ07-10-28£¬??? ?? <clfff.peter在gmail.com> дµÀ£º
> >
> > 1¡µÎªÊ²Ã´ÏÂÃæÓï¾ä»á³ö´í£¿
> >   a>    a=u"ΪʲôÏÂÃæÓï¾ä»á³ö´í"
> >           b=a.encode('utf-8')
> >           c=b.encode('utf-16')
> b ÒѾ­ÊÇÆÕͨ×Ö·û´®ÁË.
> > -----------------------------------------------------
> >   b>    a="ΪʲôÏÂÃæÓï¾ä»á³ö´í"
> >           b=a.encode('utf-8')
> a ²»ÊÇunicode ×Ö·û´®.
> >
> > 2¡µÎªÊ²Ã´bµÄÀàÐÍÊÇ"str"£¬bÔÚת»»¹ý³ÌÖÐÊDz»ÊǶªµôÁËËûµÄÀàÐÍ£¿»òÕß˵"utf-8"ÊÇÈçºÎ·´Ó³³öÀ´µÄ£¿
> >    a=u"bµÄÀàÐÍ"
> >    b=a.encode('utf-8')
> >    print type(b)
> > ½á¹ûÊÇ£ºstr
> >
> b ÊÇ°´utf-8 ±àÂëµÄÆÕͨ×Ö·û´®.
> >
>
> >
> > 3¡µÈçºÎµÃµ½Ä¬ÈϱàÂëÀàÐÍ£¿
>
> sys.getdefaultencoding()
> Õâ¸öÊÇpython µÄĬÈϱàÂë.
>
> >
> > 4¡µencodeÓëdecodeµ½µ×ÊÇÒÔ˭ΪĿ±ê±àÂëµÄ£¿£¿
>     encode ÊÇ°Ñ unicode ×Ö·û´®, ת»»³É¶ÔÓ¦±àÂëµÄ×Ö·û´®.
>     decode ÊÇÏà·´.
> >
> > ÏÈллÀ²¡£
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese在lists.python.cn
> > Subscribe: send subscribe to python-chinese-request在lists.python.cn
> > Unsubscribe: send unsubscribe to  python-chinese-request在lists.python.cn
> > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> >
>
>
>
> --
> Tao Fei (ÌÕ·É)
> My Blog: blog.filia.cn
> My Summer Of Code Blog: filiasoc.blogspot.com
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to python-chinese-request在lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request在lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
-------------- 下一部分 --------------
Ò»¸öHTML¸½¼þ±»ÒƳý...
URL: http://python.cn/pipermail/python-chinese/attachments/20071029/bd85b992/attachment.html 

可能你的文字里包含了些特殊字符吧。加个参数a.decode('utf-8','ignore') 对无法转换的字符进行忽略。
在 07-10-29，??? ??<clfff.peter在gmail.com> 写道：
> 但是，下面语句：
>
> a="为什么下面语句会出错"
> a.decode('utf-16')
> a.decode('utf-8')  #为什么只有这一行会出错？
> a.decode('big5')
> a.decode('gb2312')
>
> 还有，你说：
>     encode 是把 unicode 字符串, 转换成对应编码的字符串.
>     decode 是相反.
> 但是str和unicode都有decode和encode呀


-- 
Blog http://vicalloy.spaces.live.com/
My googlepage http://vicalloy.googlepages.com/
OldPhoto http://www.lzpian.com/

ÇëÎÊÏ£º
a="ΪʲôÏÂÃæÓï¾ä»á³ö´í"
a.decode('gb2312')   #ÕâÒ»¾äµ½µ××öÁËʲô£¿
u'\u4e3a\u4ec0\u4e48\u4e0b\u9762\u8bed\u53e5\u4f1a\u51fa\u9519'     #ÕâÊǽá¹û
ÊÇ´Ógbkתµ½gb2312Âð£¿
µ«Êǽá¹ûÖÐΪʲôÒÔu´òÍ·£¬¶øÇÒÿ¸ö¶¼ÒÔ'\u'´òÍ·£¬ÄܽâÊÍÏÂΪʲôÂ𣿻òÕßÕâ´ú±íʲô£¿



ÔÚ07-10-29£¬vicalloy <zbirder在gmail.com> дµÀ£º
>
> ¿ÉÄÜÄãµÄÎÄ×ÖÀï°üº¬ÁËЩÌØÊâ×Ö·û°É¡£¼Ó¸ö²ÎÊýa.decode('utf-8','ignore') ¶ÔÎÞ·¨×ª»»µÄ×Ö·û½øÐкöÂÔ¡£
> ÔÚ 07-10-29£¬??? ??<clfff.peter在gmail.com> дµÀ£º
> > µ«ÊÇ£¬ÏÂÃæÓï¾ä£º
> >
> > a="ΪʲôÏÂÃæÓï¾ä»á³ö´í"
> > a.decode('utf-16')
> > a.decode('utf-8')  #ΪʲôֻÓÐÕâÒ»Ðлá³ö´í£¿
> > a.decode('big5')
> > a.decode('gb2312')
> >
> > »¹ÓУ¬Äã˵£º
> >     encode ÊÇ°Ñ unicode ×Ö·û´®, ת»»³É¶ÔÓ¦±àÂëµÄ×Ö·û´®.
> >     decode ÊÇÏà·´.
> > µ«ÊÇstrºÍunicode¶¼ÓÐdecodeºÍencodeѽ
>
>
> --
> Blog http://vicalloy.spaces.live.com/
> My googlepage http://vicalloy.googlepages.com/
> OldPhoto http://www.lzpian.com/
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to python-chinese-request在lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request在lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
-------------- 下一部分 --------------
Ò»¸öHTML¸½¼þ±»ÒƳý...
URL: http://python.cn/pipermail/python-chinese/attachments/20071029/597dbfc3/attachment.htm 

 gbkÖ»²»¹ýÊDZÈgb2312  ·¶Î§´ó£¬ºÃÏñÒ²°üÀ¨·±ÌåÖÐÎÄ¡£

  a.decode('gb2312')     ÊÇ˵˵£¬aÊÇÓÃgb2312±àÂëµÄ£¬ÏÖÔÚÒª°ÑËü±äΪunicode




faitherQ
2007-10-29



·¢¼þÈË£º ??? ??
·¢ËÍʱ¼ä£º 2007-10-29 14:35:43
ÊÕ¼þÈË£º python-chinese在lists.python.cn
³­ËÍ£º 
Ö÷Ì⣺ Re: [python-chinese]Çë½Ì¼¸¸öÎÊÌâ¡£

ÇëÎÊÏ£º
a="ΪʲôÏÂÃæÓï¾ä»á³ö´í"
a.decode('gb2312')   #ÕâÒ»¾äµ½µ××öÁËʲô£¿
u'\u4e3a\u4ec0\u4e48\u4e0b\u9762\u8bed\u53e5\u4f1a\u51fa\u9519'     #ÕâÊǽá¹û
ÊÇ´Ógbkתµ½gb2312Âð£¿
µ«Êǽá¹ûÖÐΪʲôÒÔu´òÍ·£¬¶øÇÒÿ¸ö¶¼ÒÔ'\u'´òÍ·£¬ÄܽâÊÍÏÂΪʲôÂ𣿻òÕßÕâ´ú±íʲô£¿


 
ÔÚ07-10-29£¬vicalloy <zbirder在gmail.com> дµÀ£º 
¿ÉÄÜÄãµÄÎÄ×ÖÀï°üº¬ÁËЩÌØÊâ×Ö·û°É¡£¼Ó¸ö²ÎÊýa.decode('utf-8','ignore') ¶ÔÎÞ·¨×ª»»µÄ×Ö·û½øÐкöÂÔ¡£
ÔÚ 07-10-29£¬??? ??< clfff.peter在gmail.com> дµÀ£º
> µ«ÊÇ£¬ÏÂÃæÓï¾ä£º
>
> a="ΪʲôÏÂÃæÓï¾ä»á³ö´í"
> a.decode('utf-16')
> a.decode('utf-8')  #ΪʲôֻÓÐÕâÒ»Ðлá³ö´í£¿
> a.decode('big5')
> a.decode ('gb2312')
>
> »¹ÓУ¬Äã˵£º
>     encode ÊÇ°Ñ unicode ×Ö·û´®, ת»»³É¶ÔÓ¦±àÂëµÄ×Ö·û´®.
>     decode ÊÇÏà·´.
> µ«ÊÇstrºÍunicode¶¼ÓÐdecodeºÍencodeѽ


--
Blog http://vicalloy.spaces.live.com/ 
My googlepage http://vicalloy.googlepages.com/
OldPhoto http://www.lzpian.com/
_______________________________________________ 
python-chinese
Post: send python-chinese在lists.python.cn
Subscribe: send subscribe to python-chinese-request在lists.python.cn 
Unsubscribe: send unsubscribe to  python-chinese-request在lists.python.cn
Detail Info: http://python.cn/mailman/listinfo/python-chinese 
-------------- 下一部分 --------------
Ò»¸öHTML¸½¼þ±»ÒƳý...
URL: http://python.cn/pipermail/python-chinese/attachments/20071029/31f1920d/attachment-0001.html 

看了一下文档.
Unicode strings are stored internally as sequences of codepoints (to
be precise as Py_UNICODE arrays).  ...........................
Once a Unicode object is used outside of CPU and memory, CPU
endianness and how these arrays are stored as bytes become an issue.
Transforming a unicode object into a sequence of bytes is called
encoding and recreating the unicode object from the sequence of bytes
is known as decoding.

在 07-10-29，??? ??<clfff.peter在gmail.com> 写道：
> 请问下：
> a="为什么下面语句会出错"
> a.decode('gb2312')   #这一句到底做了什么？
a 本身是几个 gb2312 编码的字符串 . 也就是上面所说的 the sequence of bytes .
len(a) = 20 , 是按字节保存的.
> u'\u4e3a\u4ec0\u4e48\u4e0b\u9762\u8bed\u53e5\u4f1a\u51fa\u9519'
这个是一个unicode 对象. 是一个 Py_UNICODE arrays.
你可以尝试len(a.decode('gb2312')) = 10
>     #这是结果
> 是从gbk转到gb2312吗？
> 但是结果中为什么以u打头，而且每个都以'\u'打头，能解释下为什么吗？或者这代表什么？
>
>
>
> 在07-10-29，vicalloy <zbirder在gmail.com> 写道：
> > 可能你的文字里包含了些特殊字符吧。加个参数a.decode('utf-8','ignore') 对无法转换的字符进行忽略。
> > 在 07-10-29，??? ??< clfff.peter在gmail.com> 写道：
> > > 但是，下面语句：
> > >
> > > a="为什么下面语句会出错"
> > > a.decode('utf-16')
> > > a.decode('utf-8')  #为什么只有这一行会出错？
> > > a.decode('big5')
> > > a.decode ('gb2312')
> > >
> > > 还有，你说：
> > >     encode 是把 unicode 字符串, 转换成对应编码的字符串.
> > >     decode 是相反.
> > > 但是str和unicode都有decode和encode呀
> >
> >
> > --
> > Blog http://vicalloy.spaces.live.com/
> > My googlepage http://vicalloy.googlepages.com/
> > OldPhoto http://www.lzpian.com/
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese在lists.python.cn
> > Subscribe: send subscribe to
> python-chinese-request在lists.python.cn
> > Unsubscribe: send unsubscribe to
> python-chinese-request在lists.python.cn
> > Detail Info:
> http://python.cn/mailman/listinfo/python-chinese
>
>
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to
> python-chinese-request在lists.python.cn
> Unsubscribe: send unsubscribe to
> python-chinese-request在lists.python.cn
> Detail Info:
> http://python.cn/mailman/listinfo/python-chinese
>


-- 
Tao Fei (陶飞)
My Blog: blog.filia.cn
My Summer Of Code Blog: filiasoc.blogspot.com

在07-10-29，??? ?? <clfff.peter at gmail.com> 写道：
>
> 请问下：
> a="为什么下面语句会出错"
> a.decode('gb2312')   #这一句到底做了什么？
>

 把a当作gb2312进行解码

u'\u4e3a\u4ec0\u4e48\u4e0b\u9762\u8bed\u53e5\u4f1a\u51fa\u9519'     #这是结果
> 是从gbk转到gb2312吗？
>

不是。是从gb2312到unicode

但是结果中为什么以u打头，而且每个都以'\u'打头，能解释下为什么吗？或者这代表什么？
>
> \u代表 unicode
>

1  str            是指带有编码的字符串
2  unicode  是指不带有编码的字符串

这两个概念的相互转换是这样进行的：
str ------>   unicode --------> str
   decode             encode
   解码                    编码


在07-10-29，vicalloy <zbirder at gmail.com> 写道：
> >
> > 可能你的文字里包含了些特殊字符吧。加个参数a.decode('utf-8','ignore') 对无法转换的字符进行忽略。
> > 在 07-10-29，??? ??< clfff.peter at gmail.com> 写道：
> > > 但是，下面语句：
> > >
> > > a="为什么下面语句会出错"
> > > a.decode('utf-16')
> > > a.decode('utf-8')  #为什么只有这一行会出错？
> > > a.decode('big5')
> > > a.decode ('gb2312')
> > >
> > > 还有，你说：
> > >     encode 是把 unicode 字符串, 转换成对应编码的字符串.
> > >     decode 是相反.
> > > 但是str和unicode都有decode和encode呀
> >
> >
> > --
> > Blog http://vicalloy.spaces.live.com/
> > My googlepage http://vicalloy.googlepages.com/
> > OldPhoto http://www.lzpian.com/
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese at lists.python.cn
> > Subscribe: send subscribe to python-chinese-request at lists.python.cn
> > Unsubscribe: send unsubscribe to  python-chinese-request at lists.python.cn
> > Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
>
>
> _______________________________________________
> python-chinese
> Post: send python-chinese at lists.python.cn
> Subscribe: send subscribe to python-chinese-request at lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request at lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>



-- 
wayne
http://blog.csdn.net/wayne92
Kingsoft(Zhuhai)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://python.cn/pipermail/python-chinese/attachments/20071029/d1aaa3df/attachment.htm 

лл´ó¼Ò£¬ÓÐЩÃ÷°×ÁË¡£^____^

ÔÚ07-10-29£¬Wayne <moonbingbing在gmail.com> дµÀ£º
>
>
>
> ÔÚ07-10-29£¬??? ?? <clfff.peter在gmail.com> дµÀ£º
> >
> > ÇëÎÊÏ£º
> > a="ΪʲôÏÂÃæÓï¾ä»á³ö´í"
> > a.decode('gb2312')   #ÕâÒ»¾äµ½µ××öÁËʲô£¿
> >
>
>  °Ñaµ±×÷gb2312½øÐнâÂë
>
>  u'\u4e3a\u4ec0\u4e48\u4e0b\u9762\u8bed\u53e5\u4f1a\u51fa\u9519'     #ÕâÊǽá¹û
> > ÊÇ´Ógbkתµ½gb2312Âð£¿
> >
>
> ²»ÊÇ¡£ÊÇ´Ógb2312µ½unicode
>
>
>  µ«Êǽá¹ûÖÐΪʲôÒÔu´òÍ·£¬¶øÇÒÿ¸ö¶¼ÒÔ'\u'´òÍ·£¬ÄܽâÊÍÏÂΪʲôÂ𣿻òÕßÕâ´ú±íʲô£¿
> >
> > \u´ú±í unicode
> >
>
> 1  str            ÊÇÖ¸´øÓбàÂëµÄ×Ö·û´®
> 2  unicode  ÊÇÖ¸²»´øÓбàÂëµÄ×Ö·û´®
>
> ÕâÁ½¸ö¸ÅÄîµÄÏ໥ת»»ÊÇÕâÑù½øÐеģº
> str ------>   unicode --------> str
>    decode             encode
>    ½âÂë                    ±àÂë
>
>
>  ÔÚ07-10-29£¬vicalloy <zbirder在gmail.com> дµÀ£º
> > >
> > > ¿ÉÄÜÄãµÄÎÄ×ÖÀï°üº¬ÁËЩÌØÊâ×Ö·û°É¡£¼Ó¸ö²ÎÊýa.decode('utf-8','ignore') ¶ÔÎÞ·¨×ª»»µÄ×Ö·û½øÐкöÂÔ¡£
> > > ÔÚ 07-10-29£¬??? ??< clfff.peter在gmail.com> дµÀ£º
> > > > µ«ÊÇ£¬ÏÂÃæÓï¾ä£º
> > > >
> > > > a="ΪʲôÏÂÃæÓï¾ä»á³ö´í"
> > > > a.decode('utf-16')
> > > > a.decode('utf-8')  #ΪʲôֻÓÐÕâÒ»Ðлá³ö´í£¿
> > > > a.decode('big5')
> > > > a.decode ('gb2312')
> > > >
> > > > »¹ÓУ¬Äã˵£º
> > > >     encode ÊÇ°Ñ unicode ×Ö·û´®, ת»»³É¶ÔÓ¦±àÂëµÄ×Ö·û´®.
> > > >     decode ÊÇÏà·´.
> > > > µ«ÊÇstrºÍunicode¶¼ÓÐdecodeºÍencodeѽ
> > >
> > >
> > > --
> > > Blog http://vicalloy.spaces.live.com/
> > > My googlepage http://vicalloy.googlepages.com/
> > > OldPhoto http://www.lzpian.com/
> > > _______________________________________________
> > > python-chinese
> > > Post: send python-chinese在lists.python.cn
> > > Subscribe: send subscribe to python-chinese-request在lists.python.cn
> > > Unsubscribe: send unsubscribe to
> > > python-chinese-request在lists.python.cn
> > > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> >
> >
> >
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese在lists.python.cn
> > Subscribe: send subscribe to python-chinese-request在lists.python.cn
> > Unsubscribe: send unsubscribe to
> > python-chinese-request在lists.python.cn
> > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> >
>
>
>
> --
> wayne
> http://blog.csdn.net/wayne92
> Kingsoft(Zhuhai)
> _______________________________________________
> python-chinese
> Post: send python-chinese在lists.python.cn
> Subscribe: send subscribe to python-chinese-request在lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request在lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
-------------- 下一部分 --------------
Ò»¸öHTML¸½¼þ±»ÒƳý...
URL: http://python.cn/pipermail/python-chinese/attachments/20071029/45e26dcf/attachment-0001.html