python语法:如何通过value找key

方法一:

raw_dict={'domain_id': '$domain_id', 'enabled': '$enabled', 'name': '$username'}

key_list = list(filter(lambda k: raw_dict.get(k) == "$domain_id", raw_dict.keys()))
print(key_list) # ['enabled', 'name']

方法二:

newdict = dict(zip(raw_dict.values(),raw_dict.keys())) #字典的反转,但是如果两个key的value一样,反转后,只会保留一个key
print(newdict)

解决问题:

接口定义的queryparm一共有3个,但是这三个参数不是非必填,测试用例需要验证分别传入这每一个参数时的返回结果,所以需要api调用时对queryparm进行移除,移除没有传入的parm

    def removeParm(self,srcInterParm,parms):
        #去除无用的parm
        pattern = re.compile(r'\$(.*?)\'')
        parmlist =re.findall(pattern,str(srcInterParm))#获取到所有$parm变量名
        noexistParm = []
        for value in parmlist:#验证parm是否在传参中包含
            if not parms.keys().__contains__(value):
                noexistParm.extend(list(filter(lambda k: srcInterParm.get(k) == '$'+value, srcInterParm.keys())))
        for key in noexistParm:
            srcInterParm.pop(key)
        return srcInterParm

    print(t.removeParm({'domain_id': '$domain_id', 'enabled': '$enabled', 'name': '$username'},{}))
#打印结果为{}

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