python接口测试断言返回值json格式和数据类型

def isJson(jsonstr):
    try:
        json.loads(jsonstr.text)
        return True
    except Exception as e:
        return False

def checktype(responsejson):
    """
    传入json并返回json数据类型
    :param responsejson:
    :return: 返回返回值参数及类型
    """
    typelist = ['int', 'str', 'list', 'bool', 'NoneType', "float"]
    #遍历返回结果的键值对
    for itemkey, itemvalue in responsejson.items(): 
        itemtype = str(type(itemvalue))
        if itemtype in typelist:
            itemvalue = itemtype
            responsejson[itemkey] = itemvalue
        elif itemtype == 'dict':
            itemvalue = itemvalue
            checktype(itemvalue)
            responsejson[itemkey] = itemvalue
    return responsejson