json recursive queries

main body:

class json_search():
    '''递归查询依赖key'''
    def search_key(self,data,key):
        self.data = data
        self.key_value = []
        if self.data_json(data) != False:
            self.search(self.data,key)
            return  self.key_value
        else:
            return False

    def data_json(self,data):
        ''' 入参判断'''
        '''json是str子类'''
        if isinstance(data,str):
            try:
                self.data=json.loads(data,encoding='utf-8')
            except ValueError :
                print("value error input")
                return False
        elif isinstance(data,dict):
            return self.data
        else:
            return False

    def search(self,data,key):
        for i in data:
            if i == key:
                self.key_value.append(data[i])
            elif isinstance(data[i],dict):
                self.key_value.append(data[i].get(key))
            elif isinstance(data[i],list):
                for j in data[i]:
                    self.search(j,key)
        return self.key_value　

示例：
search_json=json_search()

Data = { 
    "API3 / getbanneradvertver2": [ 
        { "10016": "token error"}, 
        { "1006": "User name error"}, 
        { "1006": "password"}, 
        { "1000": " success "} 
    ], 
    " API3 / beta4 ": [ 
        {" 1006 ":" successful landing "}, 
        {" 1006 ":" username error "}, 
        {" 1006 ":" wrong password "} 
    ], 
    " API3 / getcourseintro ": [ 
        {" 1006 ":" error token "}, 
        {" 1006 ": 2022}, 
        {" 10001 ":" user name error "}, 
        {" 10002 ": [{" 100092 ":" 9 "}]
         }
    ],
    "/api3/getads":[
      {"1000":"成功"}
    ]
}
if __name__ == "__main__":
    print(search_json.search_key(data,"1000"))