def get_argument_ex(self, str):
    from utils import json2dict
    str2dict = json2dict(self.request.body)
    return (str2dict[str] if (str in str2dict.keys()) else False)
def get_argument_ex(self, str):
    from utils import json2dict
    str2dict = json2dict(self.request.body)
    return (str2dict[str] if (str in str2dict.keys()) else False)