{"id":1138484,"date":"2025-01-08T22:00:21","date_gmt":"2025-01-08T14:00:21","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1138484.html"},"modified":"2025-01-08T22:00:24","modified_gmt":"2025-01-08T14:00:24","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8python%e4%b8%ad%e5%86%99%e4%b8%80%e4%b8%aa%e6%ad%bb%e5%be%aa%e7%8e%af%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1138484.html","title":{"rendered":"\u5982\u4f55\u5728python\u4e2d\u5199\u4e00\u4e2a\u6b7b\u5faa\u73af\u8bed\u53e5"},"content":{"rendered":"

\"\u5982\u4f55\u5728python\u4e2d\u5199\u4e00\u4e2a\u6b7b\u5faa\u73af\u8bed\u53e5\"<\/p>\n

\u5728 Python \u4e2d\u5199\u4e00\u4e2a\u6b7b\u5faa\u73af\u8bed\u53e5\u6709\u51e0\u4e2a\u5e38\u89c1\u7684\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528 while \u5faa\u73af\u3001for \u5faa\u73af\u4ee5\u53ca\u6761\u4ef6\u5224\u65ad\u7b49\u3002\u5e38\u89c1\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528 while True \u5faa\u73af\u3001for \u5faa\u73af\u4e0e itertools \u6a21\u5757\u3002\u4ee5\u4e0b\u5c06\u8be6\u7ec6\u63cf\u8ff0\u5982\u4f55\u4f7f\u7528 while \u5faa\u73af\u6765\u7f16\u5199\u6b7b\u5faa\u73af\uff0c\u5e76\u4ecb\u7ecd\u5176\u4ed6\u65b9\u6cd5\u3002<\/strong><\/p>\n<\/p>\n

\u4e00\u3001while True \u5faa\u73af<\/h3>\n<\/p>\n

while True<\/code> \u662f\u5728 Python \u4e2d\u7f16\u5199\u6b7b\u5faa\u73af\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u8fd9\u79cd\u5faa\u73af\u4f1a\u4e00\u76f4\u8fd0\u884c\uff0c\u76f4\u5230\u5185\u90e8\u51fa\u73b0 break<\/code> \u8bed\u53e5\u6216\u7a0b\u5e8f\u88ab\u5f3a\u5236\u7ec8\u6b62\u3002<\/p>\n<\/p>\n

\u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n<\/p>\n

while True:<\/p>\n
    print("This is a dead loop")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cwhile True<\/code> \u8868\u793a\u5faa\u73af\u6761\u4ef6\u6c38\u8fdc\u4e3a\u771f\uff0c\u56e0\u6b64\u5faa\u73af\u4f1a\u65e0\u9650\u6267\u884c\u3002\u6bcf\u6b21\u5faa\u73af\u4e2d\uff0c\u7a0b\u5e8f\u90fd\u4f1a\u6253\u5370\u51fa "This is a dead loop"\u3002\u8981\u4e2d\u65ad\u8fd9\u4e2a\u5faa\u73af\uff0c\u901a\u5e38\u9700\u8981\u67d0\u79cd\u6761\u4ef6\u5224\u65ad\u548c break<\/code> \u8bed\u53e5\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
count = 0<\/p>\n
while True:<\/p>\n
    print("This is a dead loop")<\/p>\n
    count += 1<\/p>\n
    if count >= 10:<\/p>\n
        break<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u5faa\u73af\u4f1a\u5728 count<\/code> \u53d8\u91cf\u8fbe\u5230 10 \u65f6\u4e2d\u65ad\u3002<\/p>\n<\/p>\n
\u4e8c\u3001for \u5faa\u73af\u4e0e itertools \u6a21\u5757<\/h3>\n<\/p>\n
\u4f7f\u7528 for<\/code> \u5faa\u73af\u7ed3\u5408 itertools<\/code> \u6a21\u5757\u4e2d\u7684 count<\/code> \u51fd\u6570\uff0c\u53ef\u4ee5\u5b9e\u73b0\u7c7b\u4f3c\u7684\u6548\u679c\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n<\/p>\n
import itertools<\/p>\n
for _ in itertools.count():<\/p>\n
    print("This is a dead loop")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
itertools.count()<\/code> \u4f1a\u751f\u6210\u4e00\u4e2a\u65e0\u9650\u5e8f\u5217\uff0cfor<\/code> \u5faa\u73af\u4f1a\u4e00\u76f4\u8fed\u4ee3\u8fd9\u4e2a\u5e8f\u5217\uff0c\u56e0\u6b64\u5f62\u6210\u4e86\u4e00\u4e2a\u6b7b\u5faa\u73af\u3002\u8fd9\u4e2a\u65b9\u6cd5\u7684\u4f18\u70b9\u5728\u4e8e\u5b83\u5229\u7528\u4e86 Python \u6807\u51c6\u5e93\u4e2d\u7684\u5de5\u5177\uff0c\u4ee3\u7801\u66f4\u5177\u53ef\u8bfb\u6027\u3002<\/p>\n<\/p>\n
\u8981\u4e2d\u65ad\u8fd9\u4e2a\u5faa\u73af\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 break<\/code> \u8bed\u53e5\uff1a<\/p>\n<\/p>\n
import itertools<\/p>\n
count = 0<\/p>\n
for _ in itertools.count():<\/p>\n
    print("This is a dead loop")<\/p>\n
    count += 1<\/p>\n
    if count >= 10:<\/p>\n
        break<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u5faa\u73af\u4f1a\u5728 count<\/code> \u53d8\u91cf\u8fbe\u5230 10 \u65f6\u4e2d\u65ad\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u6761\u4ef6\u5224\u65ad\u4e0e\u9012\u5f52<\/h3>\n<\/p>\n
\u867d\u7136\u4e0d\u5e38\u89c1\uff0c\u4f46\u4f7f\u7528\u6761\u4ef6\u5224\u65ad\u548c\u9012\u5f52\u4e5f\u53ef\u4ee5\u5b9e\u73b0\u6b7b\u5faa\u73af\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/h4>\n<\/p>\n
def dead_loop():<\/p>\n
    print("This is a dead loop")<\/p>\n
    dead_loop()<\/p>\n
dead_loop()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u51fd\u6570 dead_loop<\/code> \u8c03\u7528\u81ea\u8eab\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u65e0\u9650\u9012\u5f52\u3002\u867d\u7136\u8fd9\u662f\u5b9e\u73b0\u6b7b\u5faa\u73af\u7684\u4e00\u79cd\u65b9\u6cd5\uff0c\u4f46\u4e0d\u5efa\u8bae\u4f7f\u7528\uff0c\u56e0\u4e3a\u65e0\u9650\u9012\u5f52\u4f1a\u5bfc\u81f4\u6808\u6ea2\u51fa\u9519\u8bef\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528\u7ebf\u7a0b\u548c\u5f02\u6b65\u65b9\u6cd5<\/h3>\n<\/p>\n
\u5728\u591a\u7ebf\u7a0b\u6216\u5f02\u6b65\u7f16\u7a0b\u4e2d\uff0c\u6709\u65f6\u9700\u8981\u5728\u540e\u53f0\u6267\u884c\u4e00\u4e2a\u6b7b\u5faa\u73af\u3002\u53ef\u4ee5\u4f7f\u7528 threading<\/code> \u6a21\u5757\u6216 asyncio<\/code> \u6a21\u5757\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff08\u4f7f\u7528 threading\uff09\uff1a<\/h4>\n<\/p>\n
import threading<\/p>\n
import time<\/p>\n
def dead_loop():<\/p>\n
    while True:<\/p>\n
        print("This is a dead loop")<\/p>\n
        time.sleep(1)<\/p>\n
thread = threading.Thread(target=dead_loop)<\/p>\n
thread.start()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cdead_loop<\/code> \u51fd\u6570\u88ab\u4f5c\u4e3a\u4e00\u4e2a\u7ebf\u7a0b\u5728\u540e\u53f0\u6267\u884c\u3002\u4e3b\u7ebf\u7a0b\u53ef\u4ee5\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u4efb\u52a1\uff0c\u800c\u6b7b\u5faa\u73af\u5219\u5728\u540e\u53f0\u8fd0\u884c\u3002\u8fd9\u79cd\u65b9\u6cd5\u5728\u9700\u8981\u5e76\u884c\u5904\u7406\u4efb\u52a1\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff08\u4f7f\u7528 asyncio\uff09\uff1a<\/h4>\n<\/p>\n
import asyncio<\/p>\n
async def dead_loop():<\/p>\n
    while True:<\/p>\n
        print("This is a dead loop")<\/p>\n
        awAI<\/a>t asyncio.sleep(1)<\/p>\n
loop = asyncio.get_event_loop()<\/p>\n
loop.run_until_complete(dead_loop())<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u4f7f\u7528\u4e86 Python \u7684\u5f02\u6b65\u7f16\u7a0b\u5e93 asyncio<\/code>\u3002dead_loop<\/code> \u51fd\u6570\u662f\u4e00\u4e2a\u5f02\u6b65\u51fd\u6570\uff0c\u5b83\u5728\u6bcf\u6b21\u5faa\u73af\u4e2d\u6682\u505c 1 \u79d2\u3002\u8fd9\u79cd\u65b9\u6cd5\u5728\u5904\u7406 I\/O \u7ed1\u5b9a\u4efb\u52a1\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u6ce8\u610f\u4e8b\u9879<\/h3>\n<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6b7b\u5faa\u73af\u901a\u5e38\u7528\u4e8e\u9700\u8981\u6301\u7eed\u8fd0\u884c\u7684\u540e\u53f0\u4efb\u52a1\u6216\u670d\u52a1\uff0c\u4f8b\u5982\u670d\u52a1\u5668\u3001\u76d1\u63a7\u7a0b\u5e8f\u7b49\u3002\u7136\u800c\uff0c\u7f16\u5199\u6b7b\u5faa\u73af\u65f6\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<\/p>\n
    \n
  1. \n
    \u8d44\u6e90\u6d88\u8017<\/strong>\uff1a\u6b7b\u5faa\u73af\u4f1a\u6301\u7eed\u5360\u7528 CPU \u548c\u5185\u5b58\u8d44\u6e90\u3002\u786e\u4fdd\u5728\u5faa\u73af\u4e2d\u9002\u5f53\u5730\u4f7f\u7528 sleep<\/code> \u7b49\u65b9\u6cd5\u6765\u964d\u4f4e\u8d44\u6e90\u6d88\u8017\u3002<\/p>\n<\/p>\n<\/li>\n
  2. \n
    \u6761\u4ef6\u4e2d\u65ad<\/strong>\uff1a\u786e\u4fdd\u6709\u5408\u9002\u7684\u6761\u4ef6\u6765\u4e2d\u65ad\u6b7b\u5faa\u73af\uff0c\u4ee5\u907f\u514d\u7a0b\u5e8f\u65e0\u6cd5\u6b63\u5e38\u7ec8\u6b62\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u4fe1\u53f7\u5904\u7406\u6216\u6761\u4ef6\u53d8\u91cf\u6765\u63a7\u5236\u5faa\u73af\u7684\u4e2d\u65ad\u3002<\/p>\n<\/p>\n<\/li>\n
  3. \n
    \u5f02\u5e38\u5904\u7406<\/strong>\uff1a\u5728\u6b7b\u5faa\u73af\u4e2d\u52a0\u5165\u5f02\u5e38\u5904\u7406\u4ee3\u7801\uff0c\u786e\u4fdd\u5728\u51fa\u73b0\u5f02\u5e38\u65f6\u7a0b\u5e8f\u80fd\u591f\u6062\u590d\u6216\u5b89\u5168\u7ec8\u6b62\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
    \u793a\u4f8b\u4ee3\u7801\uff08\u7ed3\u5408\u4ee5\u4e0a\u6ce8\u610f\u4e8b\u9879\uff09\uff1a<\/h4>\n<\/p>\n
    import time<\/p>\n
    import signal<\/p>\n
    import threading<\/p>\n
    stop_thread = False<\/p>\n
    def signal_handler(signum, frame):<\/p>\n
        global stop_thread<\/p>\n
        stop_thread = True<\/p>\n
    signal.signal(signal.SIGINT, signal_handler)<\/p>\n
    def dead_loop():<\/p>\n
        while not stop_thread:<\/p>\n
            try:<\/p>\n
                print("This is a dead loop")<\/p>\n
                time.sleep(1)<\/p>\n
            except Exception as e:<\/p>\n
                print(f"An error occurred: {e}")<\/p>\n
                break<\/p>\n
    thread = threading.Thread(target=dead_loop)<\/p>\n
    thread.start()<\/p>\n
    thread.join()<\/p>\n
    print("Loop terminated")<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u4f7f\u7528\u4e86\u4fe1\u53f7\u5904\u7406\u6765\u4e2d\u65ad\u6b7b\u5faa\u73af\uff0c\u5e76\u52a0\u5165\u4e86\u5f02\u5e38\u5904\u7406\u4ee3\u7801\u6765\u6355\u83b7\u548c\u5904\u7406\u53ef\u80fd\u7684\u5f02\u5e38\u3002<\/p>\n<\/p>\n
    \u603b\u7ed3<\/h3>\n<\/p>\n
    \u5728 Python \u4e2d\u7f16\u5199\u6b7b\u5faa\u73af\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528 while True<\/code> \u5faa\u73af\u3001for<\/code> \u5faa\u73af\u7ed3\u5408 itertools<\/code> \u6a21\u5757\u3001\u9012\u5f52\u3001\u4ee5\u53ca\u591a\u7ebf\u7a0b\u548c\u5f02\u6b65\u65b9\u6cd5\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u9002\u7528\u7684\u573a\u666f\u548c\u4f18\u7f3a\u70b9\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9700\u8981\u6ce8\u610f\u8d44\u6e90\u6d88\u8017\u3001\u6761\u4ef6\u4e2d\u65ad\u548c\u5f02\u5e38\u5904\u7406\uff0c\u4ee5\u786e\u4fdd\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
     \u5982\u4f55\u5728Python\u4e2d\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u6b7b\u5faa\u73af\uff1f<\/strong>
    \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528while<\/code>\u8bed\u53e5\u6765\u521b\u5efa\u4e00\u4e2a\u6b7b\u5faa\u73af\u3002\u53ea\u9700\u5c06\u6761\u4ef6\u8bbe\u7f6e\u4e3aTrue<\/code>\uff0c\u5faa\u73af\u5c06\u4e0d\u65ad\u6267\u884c\u3002\u4f8b\u5982\uff1a  <\/p>\n
    while True:\n    print("\u8fd9\u662f\u4e00\u4e2a\u6b7b\u5faa\u73af")\n<\/code><\/pre>\n
    \u8fd9\u6bb5\u4ee3\u7801\u4f1a\u6301\u7eed\u6253\u5370\u201c\u8fd9\u662f\u4e00\u4e2a\u6b7b\u5faa\u73af\u201d\u76f4\u5230\u7a0b\u5e8f\u88ab\u5f3a\u5236\u7ec8\u6b62\u3002<\/p>\n
    \u6b7b\u5faa\u73af\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u6709\u4ec0\u4e48\u7528\u5904\uff1f<\/strong>
    \u6b7b\u5faa\u73af\u5e38\u7528\u4e8e\u9700\u8981\u6301\u7eed\u8fd0\u884c\u7684\u7a0b\u5e8f\uff0c\u6bd4\u5982\u670d\u52a1\u5668\u76d1\u542c\u3001\u6e38\u620f\u4e3b\u5faa\u73af\u6216\u6301\u7eed\u8bfb\u53d6\u4f20\u611f\u5668\u6570\u636e\u7684\u573a\u666f\u3002\u5728\u8fd9\u4e9b\u60c5\u51b5\u4e0b\uff0c\u7a0b\u5e8f\u9700\u8981\u6301\u7eed\u6267\u884c\u67d0\u4e9b\u64cd\u4f5c\uff0c\u76f4\u5230\u5916\u90e8\u6761\u4ef6\u89e6\u53d1\u9000\u51fa\u3002<\/p>\n
    \u5982\u4f55\u5b89\u5168\u5730\u9000\u51fa\u4e00\u4e2a\u6b7b\u5faa\u73af\uff1f<\/strong>
    \u4e3a\u4e86\u5b89\u5168\u9000\u51fa\u6b7b\u5faa\u73af\uff0c\u53ef\u4ee5\u5728\u5faa\u73af\u5185\u90e8\u8bbe\u7f6e\u7279\u5b9a\u7684\u6761\u4ef6\u6765\u6253\u7834\u5faa\u73af\u3002\u4f8b\u5982\uff0c\u4f7f\u7528break<\/code>\u8bed\u53e5\u914d\u5408\u7528\u6237\u8f93\u5165\u6216\u7279\u5b9a\u4e8b\u4ef6\u89e6\u53d1\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
    while True:\n    user_input = input("\u8f93\u5165 'exit' \u9000\u51fa\u5faa\u73af\uff1a")\n    if user_input.lower() == 'exit':\n        break\n<\/code><\/pre>\n
    \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u7528\u6237\u8f93\u5165\u201cexit\u201d\u5c06\u5bfc\u81f4\u5faa\u73af\u7ec8\u6b62\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728 Python \u4e2d\u5199\u4e00\u4e2a\u6b7b\u5faa\u73af\u8bed\u53e5\u6709\u51e0\u4e2a\u5e38\u89c1\u7684\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528 while \u5faa\u73af\u3001for \u5faa\u73af\u4ee5\u53ca\u6761\u4ef6\u5224\u65ad\u7b49\u3002 […]","protected":false},"author":3,"featured_media":1138492,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1138484"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1138484"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1138484\/revisions"}],"predecessor-version":[{"id":1138495,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1138484\/revisions\/1138495"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1138492"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1138484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1138484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1138484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}