如何转换十六进制字符串“\x89PNG”在Python中纯文本 [英] How to convert hex string "\x89PNG" to plain text in python

问题描述

我有一个字符串\x89PNG，我想将它转换为纯文本。

I转介 http：// love- python.blogspot.in/2008/05/convert-hext-to-ascii-string-in-python.html
但是我发现它有点复杂。这可以用更简单的方式完成吗？

是纯文本。只需尝试打印即可：

 >>> s ='\x89PNG'
>>>打印s 
┴PNG
  

链接中的配方没有任何作用：

 >>> hex_string ='\x70f = l\x26hl = en\x26geocode = \x26q\x3c'
>>> ascii_string = reformat_content（hex_string）
>>> hex_string == ascii_string 
 True 
  

真正的十六进制明文编码解码是小菜一碟：

 >>> s.encode（'hex'）
'89504e47'
>>> '89504e47'.decode（'hex'）
'\x89PNG'
  

---

但是，您可能遇到像'\x70f = l\x26hl = en\x26geocode = \x26q\x3c''\'和'x'是不同的字符：

 >>> s ='\\x70f = l\\x26hl = en\\x26geocode = \\x26q\\\x3c'
>>>打印s 
 \x70f = l\x26hl = en\x26geocode = \x26q\x3c 
  

在这种情况下， string_escape 编码真的很有用：

 >>> print s.decode（'string_escape'）
 pf = 1& hl = en& geocode =& q< 
  

---

关于编码的更多信息 - http://docs.python.org/library/codecs.html#standard-encodings

I have a string "\x89PNG" which I want to convert to plain text.

I referred http://love-python.blogspot.in/2008/05/convert-hext-to-ascii-string-in-python.html But I found it a little complicated. Can this be done in a simpler way?

解决方案

\x89PNG is a plain text. Just try to print it:

>>> s = '\x89PNG'
>>> print s
┴PNG

The recipe in the link does nothing:

>>> hex_string = '\x70f=l\x26hl=en\x26geocode=\x26q\x3c'
>>> ascii_string = reformat_content(hex_string)
>>> hex_string == ascii_string
True

The real hex<->plaintext encoding\decoding is a piece of cake:

>>> s.encode('hex')
'89504e47'
>>> '89504e47'.decode('hex')
'\x89PNG'

---

However, you may have problems with strings like '\x70f=l\x26hl=en\x26geocode=\x26q\x3c', where '\' and 'x' are separate characters:

>>> s = '\\x70f=l\\x26hl=en\\x26geocode=\\x26q\\x3c'
>>> print s
\x70f=l\x26hl=en\x26geocode=\x26q\x3c

In this case string_escape encoding is really helpful:

>>> print s.decode('string_escape')
pf=l&hl=en&geocode=&q<

---

More about encodings - http://docs.python.org/library/codecs.html#standard-encodings

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