python json.dumps() json.dump()的区别

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先看代码实例

In [1]: a = {‘a‘: ‘abc‘, ‘b‘: "bcd"}

In [2]: 

In [2]: import json

In [3]: print json.dumps(a)
{"a": "abc", "b": "bcd"}

In [4]: print json.dump(a)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-4-68d925ef8846> in <module>()
----> 1 print json.dump(a)

TypeError: dump() takes at least 2 arguments (1 given)

dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, cls=None, indent=None, separators=None, encoding=‘utf-8‘, default=None, sort_keys=False, **kw)
Serialize ``obj`` to a JSON formatted ``str``.

dump(obj, fp, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, cls=None, indent=None, separators=None, encoding=‘utf-8‘, default=None, sort_keys=False, **kw)
Serialize ``obj`` as a JSON formatted stream to ``fp`` (a
``.write()``-supporting file-like object).

简单说就是dump给的是一个类似于文件指针的东西（并不是真的指针），可以与文件操作结合，而dumps直接给的是str

实际中dump很少用。 

python json.dumps() json.dump()的区别

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原文地址：http://www.cnblogs.com/wswang/p/5411826.html