python解释xml文件遇到不合法字符,如何解决?

zuiwei

python2.6，我用minidom解析一个xmlString。一开始不成功，报错:
>>>xmldoc=minidom.parseString(xmlstring)
UnicodeEncodeError: 'ascii' codec can't encode characters in position... ...

我上网查了一下，发现说是python自身的设置问题，于是修改了
C:\Python26\Lib\site.py
把下面这个函数的
def setencoding():
    """Set the string encoding used by the Unicode implementation.  The
    default is 'ascii', but if you're willing to experiment, you can
    change this."""
    encoding = "ascii" # Default value set by _PyUnicode_Init()
    if 0:
        # Enable to support locale aware default string encodings.
        import locale
        loc = locale.getdefaultlocale()
        if loc[1]:
            encoding = loc[1]

... ...里面第一个if 0改成了if 1
然后这个错误没有了，但是在处理xml的过程中，又遇到另一个问题:
Traceback (most recent call last):
  File "d:\my.py", line 50, in <module>
    xmldoc=minidom.parseString(xmlstring)
  File "C:\Python26\lib\xml\dom\minidom.py", line 1928, in parseString
    return expatbuilder.parseString(string)
  File "C:\Python26\lib\xml\dom\expatbuilder.py", line 940, in parseString
    return builder.parseString(string)
  File "C:\Python26\lib\xml\dom\expatbuilder.py", line 223, in parseString
    parser.Parse(string, True)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 43926-43928: ordinal not in range(12

这到底是什么错误?

bikong0411

先encode

zuiwei

自己顶一下!

zuiwei

bikong0411 发表于 2012-04-11 16:34
先encode

能展开的说一下么? 先encode然后立刻decode? 能不能简单的写两句代码呢?
谢谢！

zuiwei

我在修改了site.py文件以后，在python shell下面测试，发现结果是这样的:

1. 
   
2. >>> c=u'\u0e42'
   
3. >>> c
   
4. u'\u0e42'
   
5. >>> print c
   
6. โ
   
7. >>> from xml.dom import minidom
   
8. >>> xmlstring="<tag>"
   
9. >>> xmlstring+=c
   
10. >>> xmlstring+="</tag>"
    
11. >>> xmlstring
    
12. u'<tag>\u0e42</tag>'
    
13. >>> minidom.parseString(xmlstring)
    

复制代码

Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    minidom.parseString(xmlstring)
  File "C:\Python26\lib\xml\dom\minidom.py", line 1928, in parseString
    return expatbuilder.parseString(string)
  File "C:\Python26\lib\xml\dom\expatbuilder.py", line 940, in parseString
    return builder.parseString(string)
  File "C:\Python26\lib\xml\dom\expatbuilder.py", line 223, in parseString
    parser.Parse(string, True)
  File "C:\Python26\lib\encodings\cp1252.py", line 12, in encode
    return codecs.charmap_encode(input,errors,encoding_table)
UnicodeEncodeError: 'charmap' codec can't encode character u'\u0e42' in position 5: character maps to <undefined>

如果不修改python的site.py，那么错误就是这样:
UnicodeEncodeError: 'ascii' codec can't encode characters in position... .

bikong0411

回复 4# zuiwei


    你可以encode成utf8解析出来之后，在encode成原来的编码

zuiwei

我测试了用elementTree也不行，报类似的错误:

1. 
   
2. >>> from xml.etree import ElementTree
   
3. >>> ElementTree
   
4. <module 'xml.etree.ElementTree' from 'C:\Python26\lib\xml\etree\ElementTree.pyc'>
   
5. >>> ElementTree.parseString(xmlstring)
   

复制代码

Traceback (most recent call last):
  File "<pyshell#17>", line 1, in <module>
    ElementTree.parseString(xmlstring)
AttributeError: 'module' object has no attribute 'parseString'

zuiwei

bikong0411 发表于 2012-04-11 17:23
回复 4# zuiwei

怎么才能encode成员来的编码呢? 如何判断原来的编码是什么?