class Solution:
    def isValid(self, s: str) -> bool:
        my_dict = {"(":")",")":"(","{":"}","}":"{","[":"]","]":"["}
        s_list = list(s)
        a_list = [] 
        for i in s_list:
            if my_dict.get(i) in s_list:
                a_list.append(i)
        print(s_list,a_list,len(s_list),len(a_list),end = "\n",sep = "     ")
        if len(s_list) == len(a_list):
            return 'true'
        else:
            return 'false'