使用Stack Python进行括号检查

class Stack:
    def __init__(self):
        self.stack = []

    def push(self, item):
        self.stack.append(item)

    def pop(self):
        if not self.is_empty():
            return self.stack.pop()
        else:
            return None

    def is_empty(self):
        return len(self.stack) == 0

    def peek(self):
        if not self.is_empty():
            return self.stack[-1]
        else:
            return None

def is_valid_parentheses(s):
    stack = Stack()
    parentheses_map = {')': '(', ']': '[', '}': '{'}

    for char in s:
        if char in parentheses_map.values():
            stack.push(char)
        elif char in parentheses_map.keys():
            if stack.is_empty() or parentheses_map[char] != stack.pop():
                return False

    return stack.is_empty()

# 测试括号检查函数
print(is_valid_parentheses("([])"))  # True
print(is_valid_parentheses("([)]"))  # False