题解 | 有效括号序列

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param s string字符串 
# @return bool布尔型
#
import re

class Solution:
    def isValid(self , s: str) -> bool:
        # write code here
        table = {"(": ")", "[":"]", "{":"}", ")":"(", "]":"[", "}":"{"}
        pool = []
        for i in s:
            if i in ["[", "(", "{"]:
                pool.append(i)
            if i in ["]", ")", "}"]:
                if len(pool) == 0:
                    return False
                if table[i] == pool[-1]:
                    pool.pop()
        if len(pool) == 0:
            return True
        else:
            return False