使用xmltodict从python中的xml文件创建json文件

Question

I am trying to create a json file from an input xml file using xmltodict with the following code

import io, xmltodict, json
infile = io.open(filename_xml, 'r')
outfile = io.open(filename_json, 'w')
o = xmltodict.parse( infile.read() )
json.dump( o , outfile )

the last line get me the following error

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/__init__.py", line 182, in dump
    fp.write(chunk)
TypeError: must be unicode, not str

I guess I need to change the encoding. My initial xml file seems to be ascii. Any idea on how to make this work? Thanks

Answer 1

You can open the file in binary mode

outfile = io.open(filename_json, 'wb')

This will allow str as well.

Answer 2

unicode和str是版本3之前的Python中的两种不同类型的对象。您可以通过强制它将您的值转换为unicode对象（基本上也是一个字符串）：

my_var = unicode(my_str)