python中json自定义dump类型

path_python_json_dumps_datetime_etc.py

#!/usr/bin/env python
# coding: u8

import datetime
import json

_dumps = json.dumps


def dumps(obj, *args, **kwargs):

    def default(obj):
        _is = lambda type: isinstance(obj, type)
        if _is(datetime.datetime):
            return obj.strftime('%Y-%m-%d %H:%M:%S')
        if _is(datetime.date):
            return obj.strftime('%Y-%m-%d')

    kwargs['default'] = default
    return _dumps(obj, *args, **kwargs)

json.dumps = dumps


def main():
    print json.dumps(datetime.date.today())
    print json.dumps(datetime.datetime.now())


if __name__ == "__main__":
    main()