UnicodeEncodeError:'ascii'编解码器不能在位置0编码字符'u'\xef':序号不在范围内(128) [英] UnicodeEncodeError: 'ascii' codec can't encode character u'\xef' in position 0: ordinal not in range(128)

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问题描述

我想解析我的XML文档。所以我已经存储了我的XML文档,如下所示:

  class XMLdocs(db.Expando):
id = db.IntegerProperty ()
name = db.StringProperty()
content = db.BlobProperty()

现在我的下面是我的代码



pre $ parser = make_parser()
curHandler = BasketBallHandler()
)parser.setContentHandler(curHandler)
for XMLdocs.all():
parser.parse(StringIO.StringIO(q.content))

我得到的错误

 'ascii'codec can ''在位置0中编码字符u'\xef':序号不在范围内(128)
追踪(最近调用最后一个):
文件/ base / python_runtime / python_lib / versions / 1 / google / appengine / ext / webapp / __ init__.py,第517行,在__call__
handler.post(* groups)
文件/base/data/home/apps/parsepython/1.348669006354245654/mapreduce/ base_handler.py,第59行,后
self。 handle()
文件/base/data/home/apps/parsepython/1.348669006354245654/mapreduce/handlers.py,第168行,处理
scan_aborted = not self.process_entity(entity,ctx)
文件/base/data/home/apps/parsepython/1.348669006354245654/mapreduce/handlers.py,第233行,在process_entity
处理程序(实体)
文件/ base / data / home /apps/parsepython/1.348669006354245654/parseXML.py,第71行,正在处理
parser.parse(StringIO.StringIO(q.content))
文件/ base / python_runtime / python_dist / lib / python2 .5 / xml / sax / expatreader.py,第107行,解析
xmlreader.IncrementalParser.parse(self,source)
文件/base/python_runtime/python_dist/lib/python2.5/ xml / sax / xmlreader.py,第123行,解析
self.feed(buffer)
文件/base/python_runtime/python_dist/lib/python2.5/xml/sax/expatreader.py ,第207行,在feed
self._parser.Parse(data,isFinal)
文件/base/data/home/apps/parsepython/1.348669006354245654 /parseXML.py,第136行,以字符为单位
打印ch
UnicodeEncodeError:'ascii'编解码器无法在位置0编码字符u'\xef':序号不在范围内(128)


解决方案

看起来您正在创建一个UTF-8字节顺序标记(BOM)。尝试使用这个带有BOM的unicode字符串提取出来:

  import codecs 

content = unicode(q。 content.strip(codecs.BOM_UTF8),'utf-8')
parser.parse(StringIO.StringIO(content))

我使用 strip 而不是 lstrip ,因为在您的情况下,您有多次出现物料清单,可能是由于连接的文件内容。


I want to parse my XML document. So I have stored my XML document as below

class XMLdocs(db.Expando):  
   id = db.IntegerProperty()    
   name=db.StringProperty()  
   content=db.BlobProperty()  

Now my below is my code

parser = make_parser()     
curHandler = BasketBallHandler()  
parser.setContentHandler(curHandler)  
for q in XMLdocs.all():  
        parser.parse(StringIO.StringIO(q.content))

I am getting below error

'ascii' codec can't encode character u'\xef' in position 0: ordinal not in range(128)
Traceback (most recent call last):  
  File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/__init__.py", line 517, in __call__
    handler.post(*groups)   
  File "/base/data/home/apps/parsepython/1.348669006354245654/mapreduce/base_handler.py", line 59, in post
    self.handle()   
  File "/base/data/home/apps/parsepython/1.348669006354245654/mapreduce/handlers.py", line 168, in handle
    scan_aborted = not self.process_entity(entity, ctx)   
  File "/base/data/home/apps/parsepython/1.348669006354245654/mapreduce/handlers.py", line 233, in process_entity
    handler(entity)   
  File "/base/data/home/apps/parsepython/1.348669006354245654/parseXML.py", line 71, in process
    parser.parse(StringIO.StringIO(q.content))   
  File "/base/python_runtime/python_dist/lib/python2.5/xml/sax/expatreader.py", line 107, in parse
    xmlreader.IncrementalParser.parse(self, source)   
  File "/base/python_runtime/python_dist/lib/python2.5/xml/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)  
  File "/base/python_runtime/python_dist/lib/python2.5/xml/sax/expatreader.py", line 207, in feed
    self._parser.Parse(data, isFinal)   
  File "/base/data/home/apps/parsepython/1.348669006354245654/parseXML.py", line 136, in characters   
    print ch   
UnicodeEncodeError: 'ascii' codec can't encode character u'\xef' in position 0: ordinal not in range(128)   

解决方案

It seems you are hitting a UTF-8 byte order mark (BOM). Try using this unicode string with BOM extracted out:

import codecs

content = unicode(q.content.strip(codecs.BOM_UTF8), 'utf-8')
parser.parse(StringIO.StringIO(content))

I used strip instead of lstrip because in your case you had multiple occurences of BOM, possibly due to concatenated file contents.

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