解决datetime.datetime is not JSON serializable

#解决datetime.datetime is not JSON serializable
class JsonDateEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, datetime):
            return obj.strftime('%Y-%m-%d %H:%M:%S')
        elif isinstance(obj, date):
            return obj.strftime("%Y-%m-%d")
        else:
            return json.JSONEncoder.default(self, obj)

allcontent = {xxx}
print(json.dumps({'status': 200, 'data': allcontent}, cls=JsonDateEncoder)