python - UnicodeEncodeError : 'ascii' codec can't encode character u'\xef' in position 0: ordinal not in range(128)

Question

我想解析我的 XML 文档。所以我将我的 XML 文档存储如下

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

现在我的下面是我的代码

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

我遇到了错误

'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)   

Answer 1

此问题的实际最佳答案取决于您的环境，特别是您的终端期望的编码。

最快的单行解决方案是将您打印的所有内容编码为您的终端几乎可以肯定接受的 ASCII，同时丢弃您无法打印的字符:

print ch #fails
print ch.encode('ascii', 'ignore')

更好的解决方案是将终端的编码更改为 utf-8，并在打印前将所有内容编码为 utf-8。您应该养成每次打印或读取字符串时考虑 unicode 编码的习惯。