我的代码中有以下几行
outs = codecs.getwriter('utf-8')(sys.stdout)
# dJSON contains JSON message with non-ASCII chars
outs.write(json.dumps(dJSON,encoding='utf-8', ensure_ascii=False, indent=indent_val))
我收到以下异常：
outs.write(json.dumps(dJSON,encoding='utf-8', ensure_ascii=False, indent=indent_val))
File "/usr/lib/python2.7/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/usr/lib/python2.7/json/encoder.py", line 204, in encode
return ''.join(chunks)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 27: ordinal not in range(128)
我通过指定encoding='utf-8' in the json.dumps声明，我避免出现此类问题。为什么我仍然收到错误？
我的猜测是dJSON对象不包含纯 unicode，但它包含 unicode 和已编码为的字符串的混合utf-8例如这失败了
>>> d = {u'name':u'पाइथन'.encode('utf-8')}
>>> json.dumps(d, encoding='utf-8', ensure_ascii=False)
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 238, in dumps
**kw).encode(obj)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/encoder.py", line 204, in encode
return ''.join(chunks)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe0 in position 1: ordinal not in range(128)
但这是有效的（一切都是unicode）
>>> d = {u'name':u'पाइथन'}
>>> json.dumps(d, encoding='utf-8', ensure_ascii=False)
u'{"name": "\u092a\u093e\u0907\u0925\u0928"}
虽然这也有效（所有字符串）
>>> d = {'name':u'पाइथन'.encode('utf-8')}
>>> json.dumps(d, encoding='utf-8', ensure_ascii=False)
'{"name": "\xe0\xa4\xaa\xe0\xa4\xbe\xe0\xa4\x87\xe0\xa4\xa5\xe0\xa4\xa8"}'
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