![\"\u5982\u4f55python\u5224\u65ad\u6808\u4e2d\u662f\u5426\u5b58\u5728\u67d0\u5143\u7d20\"](\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25082721\/bd88983f-f662-4b64-a158-47bb97c15245.webp\")
<\/p>\n<\/p>\n
\u8981\u5224\u65adPython\u6808\u4e2d\u662f\u5426\u5b58\u5728\u67d0\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 \u76f4\u63a5\u4f7f\u7528 \u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u591a\u79cd\u65b9\u6cd5\u6765\u5224\u65adPython\u6808\u4e2d\u662f\u5426\u5b58\u5728\u67d0\u5143\u7d20\uff0c\u5e76\u63a2\u8ba8\u6bcf\u79cd\u65b9\u6cd5\u7684\u4f18\u7f3a\u70b9\u3002<\/p>\n<\/p>\n \u4f7f\u7528 element = 3<\/p>\n if element in stack:<\/p>\n print(f"{element} is in the stack")<\/p>\n else:<\/p>\n print(f"{element} is not in the stack")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u904d\u5386\u6808\u662f\u4e00\u79cd\u8f83\u4e3a\u57fa\u7840\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u904d\u5386\u6808\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u6765\u5224\u65ad\u76ee\u6807\u5143\u7d20\u662f\u5426\u5b58\u5728\uff1a<\/p>\n<\/p>\n element = 3<\/p>\n found = False<\/p>\n for item in stack:<\/p>\n if item == element:<\/p>\n found = True<\/p>\n break<\/p>\n if found:<\/p>\n print(f"{element} is in the stack")<\/p>\n else:<\/p>\n print(f"{element} is not in the stack")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u5982\u679c\u6808\u662f\u7531\u67d0\u4e9b\u7279\u5b9a\u7684\u6570\u636e\u7ed3\u6784\uff08\u5982 stack = deque([1, 2, 3, 4, 5])<\/p>\n element = 3<\/p>\n if element in stack:<\/p>\n print(f"{element} is in the stack")<\/p>\n else:<\/p>\n print(f"{element} is not in the stack")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u9012\u5f52\u662f\u4e00\u79cd\u8f83\u4e3a\u590d\u6742\u4f46\u6709\u8da3\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u9012\u5f52\u8c03\u7528\u51fd\u6570\u6765\u5224\u65ad\u5143\u7d20\u662f\u5426\u5728\u6808\u4e2d\uff1a<\/p>\n<\/p>\n if not stack:<\/p>\n return False<\/p>\n if stack[-1] == element:<\/p>\n return True<\/p>\n return is_in_stack(stack[:-1], element)<\/p>\n stack = [1, 2, 3, 4, 5]<\/p>\n element = 3<\/p>\n if is_in_stack(stack, element):<\/p>\n print(f"{element} is in the stack")<\/p>\n else:<\/p>\n print(f"{element} is not in the stack")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u5982\u679c\u6808\u4e2d\u5143\u7d20\u552f\u4e00\uff0c\u53ef\u4ee5\u5c06\u6808\u8f6c\u6362\u4e3a\u96c6\u5408\uff08set\uff09\uff0c\u5229\u7528\u96c6\u5408\u7684\u67e5\u627e\u6548\u7387\uff08O(1)\uff09\u6765\u5224\u65ad\u5143\u7d20\u662f\u5426\u5b58\u5728\uff1a<\/p>\n<\/p>\n element = 3<\/p>\n stack_set = set(stack)<\/p>\n if element in stack_set:<\/p>\n print(f"{element} is in the stack")<\/p>\n else:<\/p>\n print(f"{element} is not in the stack")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u5982\u679c\u6808\u662f\u6709\u5e8f\u7684\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u6765\u63d0\u9ad8\u67e5\u627e\u6548\u7387\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(log n)\uff1a<\/p>\n<\/p>\n stack = [1, 2, 3, 4, 5]<\/p>\n element = 3<\/p>\n index = bisect.bisect_left(stack, element)<\/p>\n if index != len(stack) and stack[index] == element:<\/p>\n print(f"{element} is in the stack")<\/p>\n else:<\/p>\n print(f"{element} is not in the stack")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u5217\u8868\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u7b80\u6d01\u7684\u5199\u6cd5\uff0c\u53ef\u4ee5\u5728\u4e00\u884c\u4ee3\u7801\u4e2d\u5b8c\u6210\u5224\u65ad\uff1a<\/p>\n<\/p>\n element = 3<\/p>\n found = any(item == element for item in stack)<\/p>\n if found:<\/p>\n print(f"{element} is in the stack")<\/p>\n else:<\/p>\n print(f"{element} is not in the stack")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u751f\u6210\u5668\u8868\u8fbe\u5f0f\u4e0e\u5217\u8868\u63a8\u5bfc\u5f0f\u7c7b\u4f3c\uff0c\u4f46\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u5728\u5927\u6570\u636e\u91cf\u65f6\u66f4\u8282\u7701\u5185\u5b58\uff1a<\/p>\n<\/p>\n element = 3<\/p>\n found = any(item == element for item in stack)<\/p>\n if found:<\/p>\n print(f"{element} is in the stack")<\/p>\n else:<\/p>\n print(f"{element} is not in the stack")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u51fd\u6570\u5f0f\u7f16\u7a0b\u98ce\u683c\u53ef\u4ee5\u5229\u7528 element = 3<\/p>\n found = any(filter(lambda x: x == element, stack))<\/p>\n if found:<\/p>\n print(f"{element} is in the stack")<\/p>\n else:<\/p>\n print(f"{element} is not in the stack")<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f18\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u7f3a\u70b9\uff1a<\/strong><\/p>\n<\/p>\n \u5982\u679c\u7ecf\u5e38\u9700\u8981\u5224\u65ad\u6808\u4e2d\u662f\u5426\u5b58\u5728\u67d0\u5143\u7d20\uff0c\u53ef\u4ee5\u81ea\u5b9a\u4e49\u4e00\u4e2a\u6808\u7c7b\uff0c\u5185\u90e8\u5c01\u88c5\u5224\u65ad\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n def __init__(self):<\/p>\n self.items = []<\/p>\n def push(self, item):<\/p>\n self.items.append(item)<\/p>\n def pop(self):<\/p>\n return self.items.pop() if self.items else None<\/p>\nin<\/code>\u8fd0\u7b97\u7b26\u3001\u904d\u5386\u6808\u3001\u5728\u7279\u5b9a\u65b9\u6cd5\u4e2d\u8fdb\u884c\u5224\u65ad\u7b49\u65b9\u6cd5\uff0c\u6700\u5e38\u7528\u7684\u662f\u76f4\u63a5\u4f7f\u7528in<\/code>\u8fd0\u7b97\u7b26\uff0c\u56e0\u4e3a\u5b83\u65e2\u7b80\u6d01\u53c8\u9ad8\u6548\u3002<\/strong><\/p>\n<\/p>\nin<\/code>\u8fd0\u7b97\u7b26\u6765\u5224\u65ad\u6808\u4e2d\u662f\u5426\u5b58\u5728\u67d0\u5143\u7d20\u662f\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\u3002\u8fd9\u4e2a\u65b9\u6cd5\u975e\u5e38\u7b80\u6d01\uff0c\u53ea\u9700\u4e00\u884c\u4ee3\u7801\u5373\u53ef\u5b8c\u6210\u5224\u65ad\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u6808stack<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528element in stack<\/code>\u6765\u68c0\u67e5element<\/code>\u662f\u5426\u5728stack<\/code>\u4e2d\u3002\u5982\u679c\u6808\u4e2d\u5305\u542b\u8be5\u5143\u7d20\uff0c\u5219\u8fd4\u56deTrue<\/code>\uff0c\u5426\u5219\u8fd4\u56deFalse<\/code>\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u7b80\u6d01\uff0c\u800c\u4e14\u5728Python\u5185\u90e8\u8fdb\u884c\u4e86\u4f18\u5316\uff0c\u6548\u7387\u8f83\u9ad8\u3002<\/p>\n<\/p>\n\u4e00\u3001\u4f7f\u7528
in<\/code>\u8fd0\u7b97\u7b26<\/h3>\n<\/p>\nin<\/code>\u8fd0\u7b97\u7b26\u662f\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u3002\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u6808stack<\/code>\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5224\u65ad\u67d0\u5143\u7d20\u662f\u5426\u5728\u6808\u4e2d\uff1a<\/p>\n<\/p>\nstack = [1, 2, 3, 4, 5]<\/p>\n\n
\n
\u4e8c\u3001\u904d\u5386\u6808<\/h3>\n<\/p>\n
stack = [1, 2, 3, 4, 5]<\/p>\n\n
\n
\u4e09\u3001\u4f7f\u7528\u6808\u7279\u5b9a\u65b9\u6cd5<\/h3>\n<\/p>\n
deque<\/code>\uff09\u5b9e\u73b0\u7684\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u6570\u636e\u7ed3\u6784\u63d0\u4f9b\u7684\u7279\u5b9a\u65b9\u6cd5\u6765\u8fdb\u884c\u5224\u65ad\u3002\u4f8b\u5982\uff0c\u4f7f\u7528deque<\/code>\u5b9e\u73b0\u6808\uff1a<\/p>\n<\/p>\nfrom collections import deque<\/p>\n\n
\n
\u56db\u3001\u4f7f\u7528\u9012\u5f52<\/h3>\n<\/p>\n
def is_in_stack(stack, element):<\/p>\n\n
\n
\u4e94\u3001\u4f7f\u7528\u96c6\u5408\uff08set\uff09\u63d0\u9ad8\u67e5\u627e\u6548\u7387<\/h3>\n<\/p>\n
stack = [1, 2, 3, 4, 5]<\/p>\n\n
\n
\u516d\u3001\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\uff08\u9002\u7528\u4e8e\u6709\u5e8f\u6808\uff09<\/h3>\n<\/p>\n
import bisect<\/p>\n\n
\n
\u4e03\u3001\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f<\/h3>\n<\/p>\n
stack = [1, 2, 3, 4, 5]<\/p>\n\n
\n
\u516b\u3001\u4f7f\u7528\u751f\u6210\u5668\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n
stack = [1, 2, 3, 4, 5]<\/p>\n\n
\n
\u4e5d\u3001\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b<\/h3>\n<\/p>\n
filter<\/code>\u6216map<\/code>\u51fd\u6570\u6765\u5224\u65ad\u5143\u7d20\u662f\u5426\u5728\u6808\u4e2d\uff1a<\/p>\n<\/p>\nstack = [1, 2, 3, 4, 5]<\/p>\n\n
\n
\u5341\u3001\u4f7f\u7528\u81ea\u5b9a\u4e49\u6808\u7c7b<\/h3>\n<\/p>\n
class Stack:<\/p>\n