{"id":1039722,"date":"2024-12-31T12:35:08","date_gmt":"2024-12-31T04:35:08","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1039722.html"},"modified":"2024-12-31T12:35:11","modified_gmt":"2024-12-31T04:35:11","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e9%87%8d%e5%a4%8d%e8%bf%90%e8%a1%8c%e6%9f%90%e6%ae%b5%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1039722.html","title":{"rendered":"python\u4e2d\u5982\u4f55\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801"},"content":{"rendered":"

\"python\u4e2d\u5982\u4f55\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801\"<\/p>\n

\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u6cd5\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801\uff0c\u5982for\u5faa\u73af\u3001while\u5faa\u73af\u3001\u51fd\u6570\u9012\u5f52\u3001\u4ee5\u53ca\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u7b49\u3002\u6700\u5e38\u89c1\u7684\u662f\u901a\u8fc7for\u5faa\u73af\u548cwhile\u5faa\u73af\u5b9e\u73b0\u3002<\/strong><\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528for\u5faa\u73af<\/h3>\n<\/p>\n

\u5728Python\u4e2d\uff0cfor\u5faa\u73af\u662f\u4e00\u4e2a\u5e38\u7528\u7684\u63a7\u5236\u6d41\u8bed\u53e5\uff0c\u7528\u4e8e\u904d\u5386\u5e8f\u5217\uff08\u5982\u5217\u8868\u3001\u5143\u7ec4\u6216\u5b57\u7b26\u4e32\uff09\u3002\u5b83\u4e5f\u53ef\u4ee5\u7528\u4e8e\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801\u6307\u5b9a\u7684\u6b21\u6570\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n

for i in range(5):<\/p>\n
    print("This is iteration number", i)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0crange(5)<\/code>\u751f\u6210\u4e86\u4e00\u4e2a\u4ece0\u52304\u7684\u5e8f\u5217\uff0cfor\u5faa\u73af\u5c06\u904d\u5386\u8fd9\u4e2a\u5e8f\u5217\u5e76\u5728\u6bcf\u6b21\u8fed\u4ee3\u4e2d\u8fd0\u884c\u5185\u90e8\u7684\u4ee3\u7801\u5757\u3002<\/p>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
for\u5faa\u73af\u7684\u4f18\u70b9\u662f\u975e\u5e38\u76f4\u89c2\uff0c\u9002\u5408\u7528\u4e8e\u5df2\u77e5\u6b21\u6570\u7684\u91cd\u590d\u64cd\u4f5c\u3002\u901a\u8fc7range()<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u63a7\u5236\u5faa\u73af\u7684\u6b21\u6570\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u7ed3\u5408\u6761\u4ef6\u8bed\u53e5\u5b9e\u73b0\u66f4\u590d\u6742\u7684\u903b\u8f91\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528while\u5faa\u73af<\/h3>\n<\/p>\n
while\u5faa\u73af\u4e5f\u662f\u4e00\u79cd\u5e38\u7528\u7684\u63a7\u5236\u6d41\u8bed\u53e5\uff0c\u5b83\u4f1a\u5728\u7ed9\u5b9a\u7684\u6761\u4ef6\u4e3aTrue\u65f6\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
count = 0<\/p>\n
while count < 5:<\/p>\n
    print("This is iteration number", count)<\/p>\n
    count += 1<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cwhile\u5faa\u73af\u4f1a\u5728count<\/code>\u53d8\u91cf\u5c0f\u4e8e5\u65f6\u91cd\u590d\u8fd0\u884c\u5185\u90e8\u7684\u4ee3\u7801\u5757\u3002<\/p>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
while\u5faa\u73af\u7684\u4f18\u52bf\u5728\u4e8e\u5b83\u53ef\u4ee5\u5904\u7406\u66f4\u590d\u6742\u7684\u6761\u4ef6\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u57fa\u4e8e\u8ba1\u6570\u5668\u3002\u5b83\u5728\u5904\u7406\u4e0d\u786e\u5b9a\u7684\u5faa\u73af\u6b21\u6570\u6216\u57fa\u4e8e\u52a8\u6001\u6761\u4ef6\u7684\u91cd\u590d\u64cd\u4f5c\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u51fd\u6570\u9012\u5f52<\/h3>\n<\/p>\n
\u9012\u5f52\u662f\u4e00\u79cd\u7f16\u7a0b\u6280\u672f\uff0c\u5176\u4e2d\u4e00\u4e2a\u51fd\u6570\u4f1a\u8c03\u7528\u81ea\u8eab\u6765\u5b8c\u6210\u67d0\u9879\u4efb\u52a1\u3002\u867d\u7136\u9012\u5f52\u53ef\u4ee5\u7528\u4e8e\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801\uff0c\u4f46\u9700\u8981\u8c28\u614e\u4f7f\u7528\uff0c\u4ee5\u907f\u514d\u65e0\u9650\u9012\u5f52\u548c\u6808\u6ea2\u51fa\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
def recursive_function(count):<\/p>\n
    if count < 5:<\/p>\n
        print("This is iteration number", count)<\/p>\n
        recursive_function(count + 1)<\/p>\n
recursive_function(0)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0crecursive_function<\/code>\u51fd\u6570\u4f1a\u8c03\u7528\u81ea\u8eab\uff0c\u76f4\u5230count<\/code>\u53d8\u91cf\u8fbe\u52305\u3002<\/p>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u9012\u5f52\u7684\u4f18\u70b9\u662f\u4ee3\u7801\u7ed3\u6784\u7b80\u6d01\uff0c\u9002\u5408\u7528\u4e8e\u81ea\u7136\u9012\u5f52\u7684\u95ee\u9898\uff08\u5982\u6811\u904d\u5386\u3001\u5206\u6cbb\u7b97\u6cd5\u7b49\uff09\u3002\u7136\u800c\uff0c\u9012\u5f52\u51fd\u6570\u9700\u8981\u5c0f\u5fc3\u5904\u7406\u57fa\u51c6\u60c5\u51b5\u4ee5\u9632\u6b62\u65e0\u9650\u9012\u5f52\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93<\/h3>\n<\/p>\n
\u6709\u65f6\uff0c\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u53ef\u4ee5\u7b80\u5316\u91cd\u590d\u8fd0\u884c\u4ee3\u7801\u7684\u4efb\u52a1\u3002\u4f8b\u5982\uff0c\u4f7f\u7528itertools<\/code>\u5e93\u4e2d\u7684repeat<\/code>\u51fd\u6570\uff1a<\/p>\n<\/p>\n
import itertools<\/p>\n
for _ in itertools.repeat(None, 5):<\/p>\n
    print("This is a repeated statement")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0citertools.repeat<\/code>\u751f\u6210\u4e86\u4e00\u4e2a\u91cd\u590d\u7684\u5e8f\u5217\uff0cfor\u5faa\u73af\u904d\u5386\u8be5\u5e8f\u5217\u5e76\u8fd0\u884c\u5185\u90e8\u4ee3\u7801\u5757\u3002<\/p>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u7b2c\u4e09\u65b9\u5e93\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u529f\u80fd\u548c\u7075\u6d3b\u6027\uff0c\u9002\u5408\u7528\u4e8e\u66f4\u590d\u6742\u7684\u91cd\u590d\u64cd\u4f5c\u6216\u9700\u8981\u989d\u5916\u529f\u80fd\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u5d4c\u5957\u5faa\u73af<\/h3>\n<\/p>\n
\u5d4c\u5957\u5faa\u73af\u662f\u6307\u5728\u4e00\u4e2a\u5faa\u73af\u5185\u90e8\u518d\u5305\u542b\u4e00\u4e2a\u5faa\u73af\u3002\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u91cd\u590d\u8fd0\u884c\u591a\u5c42\u6b21\u4ee3\u7801\u7684\u60c5\u51b5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
for i in range(3):<\/p>\n
    for j in range(2):<\/p>\n
        print(f"Outer loop iteration {i}, Inner loop iteration {j}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u5916\u5c42\u5faa\u73af\u8fd0\u884c3\u6b21\uff0c\u6bcf\u6b21\u5916\u5c42\u5faa\u73af\u90fd\u4f1a\u89e6\u53d1\u5185\u5c42\u5faa\u73af\u8fd0\u884c2\u6b21\u3002<\/p>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u5d4c\u5957\u5faa\u73af\u9002\u7528\u4e8e\u591a\u7ef4\u5ea6\u7684\u91cd\u590d\u64cd\u4f5c\uff0c\u5e38\u7528\u4e8e\u5904\u7406\u591a\u7ef4\u6570\u7ec4\u6216\u5d4c\u5957\u6570\u636e\u7ed3\u6784\u3002\u7136\u800c\uff0c\u5d4c\u5957\u5faa\u73af\u4f1a\u589e\u52a0\u4ee3\u7801\u7684\u590d\u6742\u6027\u548c\u8fd0\u884c\u65f6\u95f4\uff0c\u56e0\u6b64\u9700\u8981\u8c28\u614e\u4f7f\u7528\u3002<\/p>\n<\/p>\n
\u516d\u3001\u5b9a\u65f6\u5668\u5b9e\u73b0\u91cd\u590d\u8fd0\u884c<\/h3>\n<\/p>\n
\u6709\u65f6\u9700\u8981\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u5185\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801\uff0c\u53ef\u4ee5\u4f7f\u7528time<\/code>\u6a21\u5757\u6216threading<\/code>\u6a21\u5757\u4e2d\u7684\u5b9a\u65f6\u5668\u6765\u5b9e\u73b0\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import time<\/p>\n
def repeated_function():<\/p>\n
    while True:<\/p>\n
        print("This function runs every 2 seconds")<\/p>\n
        time.sleep(2)<\/p>\n
repeated_function()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0ctime.sleep(2)<\/code>\u4f7f\u7a0b\u5e8f\u6682\u505c2\u79d2\uff0c\u7136\u540e\u7ee7\u7eed\u8fd0\u884c\uff0c\u8fd9\u6837\u53ef\u4ee5\u5b9e\u73b0\u6bcf\u96942\u79d2\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801\u3002<\/p>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u5b9a\u65f6\u5668\u9002\u7528\u4e8e\u5468\u671f\u6027\u4efb\u52a1\uff0c\u5982\u5b9a\u65f6\u68c0\u67e5\u3001\u5b9a\u65f6\u66f4\u65b0\u7b49\u3002\u4f7f\u7528\u5b9a\u65f6\u5668\u9700\u8981\u6ce8\u610f\u7cfb\u7edf\u8d44\u6e90\u7684\u6d88\u8017\u548c\u7cbe\u786e\u5ea6\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u4f7f\u7528\u591a\u7ebf\u7a0b\u6216\u591a\u8fdb\u7a0b<\/h3>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u4f7f\u7528\u591a\u7ebf\u7a0b\u6216\u591a\u8fdb\u7a0b\u6765\u5b9e\u73b0\u5e76\u53d1\u7684\u91cd\u590d\u8fd0\u884c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528threading<\/code>\u6a21\u5757\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import threading<\/p>\n
def thread_function():<\/p>\n
    for i in range(5):<\/p>\n
        print("This is a thread running iteration", i)<\/p>\n
thread = threading.Thread(target=thread_function)<\/p>\n
thread.start()<\/p>\n
thread.join()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cthreading.Thread<\/code>\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7ebf\u7a0b\uff0c\u5e76\u5728\u8be5\u7ebf\u7a0b\u4e2d\u8fd0\u884c\u6307\u5b9a\u7684\u51fd\u6570\u3002<\/p>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u591a\u7ebf\u7a0b\u548c\u591a\u8fdb\u7a0b\u9002\u7528\u4e8e\u9700\u8981\u5e76\u53d1\u8fd0\u884c\u7684\u4efb\u52a1\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u54cd\u5e94\u901f\u5ea6\u3002\u7136\u800c\uff0c\u4f7f\u7528\u591a\u7ebf\u7a0b\u6216\u591a\u8fdb\u7a0b\u9700\u8981\u5904\u7406\u7ebf\u7a0b\u540c\u6b65\u3001\u8d44\u6e90\u5171\u4eab\u7b49\u95ee\u9898\u3002<\/p>\n<\/p>\n
\u516b\u3001\u4f7f\u7528\u751f\u6210\u5668<\/h3>\n<\/p>\n
\u751f\u6210\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u8fed\u4ee3\u5668\uff0c\u53ef\u4ee5\u7528\u4e8e\u9010\u6b65\u751f\u6210\u5e8f\u5217\u4e2d\u7684\u503c\uff0c\u4ece\u800c\u5b9e\u73b0\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
def generator_function():<\/p>\n
    for i in range(5):<\/p>\n
        yield i<\/p>\n
gen = generator_function()<\/p>\n
for value in gen:<\/p>\n
    print("This is iteration number", value)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cgenerator_function<\/code>\u901a\u8fc7yield<\/code>\u5173\u952e\u5b57\u9010\u6b65\u751f\u6210\u503c\uff0cfor\u5faa\u73af\u904d\u5386\u751f\u6210\u5668\u5e76\u8fd0\u884c\u5185\u90e8\u4ee3\u7801\u5757\u3002<\/p>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/h4>\n<\/p>\n
\u751f\u6210\u5668\u7684\u4f18\u70b9\u662f\u5185\u5b58\u6548\u7387\u9ad8\u3001\u4ee3\u7801\u7b80\u6d01\uff0c\u9002\u5408\u7528\u4e8e\u5904\u7406\u5927\u91cf\u6570\u636e\u6216\u9700\u8981\u52a8\u6001\u751f\u6210\u6570\u636e\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e5d\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u901a\u8fc7\u4e0a\u8ff0\u65b9\u6cd5\uff0c\u60a8\u53ef\u4ee5\u5728Python\u4e2d\u5b9e\u73b0\u91cd\u590d\u8fd0\u884c\u67d0\u6bb5\u4ee3\u7801\u7684\u9700\u6c42\u3002\u9009\u62e9\u9002\u5408\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u548c\u9700\u6c42\u3002for\u5faa\u73af\u9002\u7528\u4e8e\u5df2\u77e5\u6b21\u6570\u7684\u91cd\u590d\u64cd\u4f5c\uff0cwhile\u5faa\u73af\u9002\u7528\u4e8e\u57fa\u4e8e\u6761\u4ef6\u7684\u91cd\u590d\u64cd\u4f5c\uff0c\u9012\u5f52\u9002\u7528\u4e8e\u81ea\u7136\u9012\u5f52\u7684\u95ee\u9898\uff0c\u7b2c\u4e09\u65b9\u5e93\u548c\u5b9a\u65f6\u5668\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u529f\u80fd\u548c\u7075\u6d3b\u6027\uff0c\u591a\u7ebf\u7a0b\u548c\u591a\u8fdb\u7a0b\u9002\u7528\u4e8e\u5e76\u53d1\u4efb\u52a1\uff0c\u751f\u6210\u5668\u9002\u7528\u4e8e\u5185\u5b58\u6548\u7387\u9ad8\u7684\u573a\u666f\u3002<\/strong><\/p>\n<\/p>\n
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\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u6709\u6548\u5730\u91cd\u590d\u6267\u884c\u4ee3\u7801\u5757\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u91cd\u590d\u6267\u884c\u4ee3\u7801\u5757\u53ef\u4ee5\u901a\u8fc7\u5faa\u73af\u7ed3\u6784\u5b9e\u73b0\u3002\u5e38\u89c1\u7684\u5faa\u73af\u6709for<\/code>\u5faa\u73af\u548cwhile<\/code>\u5faa\u73af\u3002\u4f7f\u7528for<\/code>\u5faa\u73af\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u4e00\u4e2a\u8303\u56f4\u6216\u5e8f\u5217\uff0c\u4ee3\u7801\u5757\u5c06\u5728\u6bcf\u6b21\u8fed\u4ee3\u4e2d\u6267\u884c\u3002\u800cwhile<\/code>\u5faa\u73af\u5219\u4f1a\u5728\u6761\u4ef6\u4e3a\u771f\u65f6\u6301\u7eed\u6267\u884c\u4ee3\u7801\u5757\u3002\u9009\u62e9\u54ea\u79cd\u5faa\u73af\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u9700\u6c42\u548c\u6761\u4ef6\u3002<\/p>\n
\u5728Python\u4e2d\u5982\u4f55\u8bbe\u7f6e\u91cd\u590d\u6b21\u6570\uff1f<\/strong>
\u82e5\u5e0c\u671b\u4ee3\u7801\u5757\u6267\u884c\u7279\u5b9a\u6b21\u6570\uff0c\u4f7f\u7528for<\/code>\u5faa\u73af\u662f\u8f83\u4e3a\u7b80\u4fbf\u7684\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528range()<\/code>\u51fd\u6570\u6765\u6307\u5b9a\u5faa\u73af\u7684\u6b21\u6570\uff0c\u5982for i in range(5):<\/code>\u5c06\u4ee3\u7801\u5757\u6267\u884c5\u6b21\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u8ba1\u6570\u5668\u53d8\u91cf\u548cwhile<\/code>\u5faa\u73af\u6765\u5b9e\u73b0\u76f8\u540c\u7684\u6548\u679c\u3002<\/p>\n
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