无法隐式地将'bytes'对象转换为str

Question

In [458]: type(obj_xml)
Out[458]: builtins.bytes

In [459]: with codecs.open( xmlOutFile, "+ab", "utf-8" ) as f:
   .....:     f.write(obj_xml)
   .....:

错误我正在点击

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-459-61a3d9d572a6> in <module>()
      1 with codecs.open( xmlOutFile, "+ab", "utf-8" ) as f:
----> 2     f.write(obj_xml)
      3

C:\Python3\lib\codecs.py in write(self, data)
    698     def write(self, data):
    699
--> 700         return self.writer.write(data)
    701
    702     def writelines(self, list):

C:\Python3\lib\codecs.py in write(self, object)
    354         """ Writes the object's contents encoded to self.stream.
    355         """
--> 356         data, consumed = self.encode(object, self.errors)
    357         self.stream.write(data)
    358

TypeError：无法隐式地将'bytes'对象转换为str 我如何将obj_xml的内容写入文件？

Answer 1

codecs.open接受Unicode字符串并在写入时将其编码为字节。你已经有了一个bytes对象，所以只需要以二进制模式打开文件文件并编写对象：

with open(xmlOutFile,'+ab') as f:
     f.write(obj_xml)