json.py 文件源码

def default(self, obj):
        if (isinstance(obj, datetime.datetime) or
            isinstance(obj, datetime.date) or
            isinstance(obj, datetime.time)):
            return int(dateformat.format(obj, 'U'))

        try:
            return super(PootleJSONEncoder, self).default(obj)
        except TypeError:
            return force_unicode(obj)