{"id":995291,"date":"2024-12-27T09:03:41","date_gmt":"2024-12-27T01:03:41","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/995291.html"},"modified":"2024-12-27T09:03:45","modified_gmt":"2024-12-27T01:03:45","slug":"python-%e5%a6%82%e4%bd%95%e9%ab%98%e6%95%88%e5%9c%b0%e9%81%8d%e5%8e%86","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/995291.html","title":{"rendered":"python \u5982\u4f55\u9ad8\u6548\u5730\u904d\u5386"},"content":{"rendered":"

\"python<\/p>\n

\u5728Python\u4e2d\uff0c\u9ad8\u6548\u5730\u904d\u5386\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u751f\u6210\u5668\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u3001itertools\u6a21\u5757\u3001\u5e76\u884c\u5904\u7406\u3001\u4f18\u5316\u6570\u636e\u7ed3\u6784\u7b49\u65b9\u5f0f\u5b9e\u73b0<\/strong>\u3002\u5176\u4e2d\uff0c\u751f\u6210\u5668\u53ef\u4ee5\u8282\u7701\u5185\u5b58\uff0c\u5217\u8868\u63a8\u5bfc\u5f0f\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u6267\u884c\u901f\u5ea6\uff0citertools\u6a21\u5757\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u8fed\u4ee3\u5668\u5de5\u5177\uff0c\u5e76\u884c\u5904\u7406\u53ef\u4ee5\u52a0\u901f\u904d\u5386\u5927\u6570\u636e\u96c6\uff0c\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7ed3\u6784\u5219\u80fd\u663e\u8457\u63d0\u5347\u904d\u5386\u6548\u7387\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u5c55\u5f00\u5176\u4e2d\u4e00\u79cd\u65b9\u5f0f\u2014\u2014\u751f\u6210\u5668\u3002<\/p>\n<\/p>\n

\u751f\u6210\u5668\u662fPython\u4e2d\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684\u8fed\u4ee3\u5668\uff0c\u4f7f\u7528yield<\/code>\u5173\u952e\u5b57\u8fd4\u56de\u5143\u7d20\u3002\u5728\u904d\u5386\u5927\u6570\u636e\u96c6\u65f6\uff0c\u751f\u6210\u5668\u975e\u5e38\u6709\u7528\uff0c\u56e0\u4e3a\u5b83\u4eec\u4e0d\u4f1a\u4e00\u6b21\u6027\u5c06\u6240\u6709\u6570\u636e\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u800c\u662f\u9010\u4e2a\u751f\u6210\u6570\u636e\u3002\u8fd9\u4e0d\u4ec5\u8282\u7701\u4e86\u5185\u5b58\uff0c\u8fd8\u63d0\u9ad8\u4e86\u904d\u5386\u7684\u6548\u7387\u3002\u4f8b\u5982\uff0c\u5f53\u5904\u7406\u5927\u578b\u65e5\u5fd7\u6587\u4ef6\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u751f\u6210\u5668\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u5c06\u6574\u4e2a\u6587\u4ef6\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002\u8fd9\u6837\u4e0d\u4ec5\u964d\u4f4e\u4e86\u5185\u5b58\u5360\u7528\uff0c\u8fd8\u80fd\u66f4\u5feb\u5730\u54cd\u5e94\u6570\u636e\u53d8\u5316\u3002<\/p>\n<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8Python\u4e2d\u9ad8\u6548\u904d\u5386\u7684\u591a\u79cd\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u751f\u6210\u5668<\/strong><\/h2>\n

\u751f\u6210\u5668\u662fPython\u4e2d\u63d0\u9ad8\u904d\u5386\u6548\u7387\u7684\u91cd\u8981\u5de5\u5177\uff0c\u5c24\u5176\u5728\u5904\u7406\u5927\u6570\u636e\u96c6\u65f6\u3002<\/p>\n<\/p>\n

1.1 \u4ec0\u4e48\u662f\u751f\u6210\u5668<\/h2>\n<\/p>\n

\u751f\u6210\u5668\u662f\u5b9e\u73b0\u8fed\u4ee3\u5668\u534f\u8bae\u7684\u4e00\u79cd\u65b9\u5f0f\u3002\u5b83\u4eec\u4f7f\u7528yield<\/code>\u5173\u952e\u5b57\u8fd4\u56de\u4e00\u4e2a\u503c\uff0c\u5e76\u5728\u4e0b\u6b21\u8c03\u7528\u65f6\u4ece\u6682\u505c\u5904\u7ee7\u7eed\u6267\u884c\u3002\u4e0e\u666e\u901a\u51fd\u6570\u4e0d\u540c\uff0c\u751f\u6210\u5668\u53ef\u4ee5\u5728\u591a\u6b21\u8c03\u7528\u4e4b\u95f4\u4fdd\u7559\u5176\u6267\u884c\u72b6\u6001\u3002<\/p>\n<\/p>\n

1.2 \u751f\u6210\u5668\u7684\u4f18\u70b9<\/h2>\n<\/p>\n

\u751f\u6210\u5668\u7684\u6700\u5927\u4f18\u52bf\u5728\u4e8e\u5b83\u4eec\u662f\u60f0\u6027\u6c42\u503c\u7684\uff0c\u5373\u5b83\u4eec\u4ec5\u5728\u9700\u8981\u65f6\u751f\u6210\u503c\u3002\u8fd9\u79cd\u7279\u6027\u4f7f\u5f97\u751f\u6210\u5668\u975e\u5e38\u9002\u5408\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\uff0c\u56e0\u4e3a\u4e0d\u5fc5\u5c06\u6574\u4e2a\u6570\u636e\u96c6\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002<\/p>\n<\/p>\n

1.3 \u751f\u6210\u5668\u7684\u4f7f\u7528<\/h2>\n<\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u751f\u6210\u5668\u51fd\u6570\u793a\u4f8b\uff1a<\/p>\n<\/p>\n

def count_up_to(max):<\/p>\n
    count = 1<\/p>\n
    while count <= max:<\/p>\n
        yield count<\/p>\n
        count += 1<\/p>\n
counter = count_up_to(5)<\/p>\n
for num in counter:<\/p>\n
    print(num)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0ccount_up_to<\/code>\u51fd\u6570\u662f\u4e00\u4e2a\u751f\u6210\u5668\uff0c\u5b83\u4f9d\u6b21\u751f\u6210\u4ece1\u5230max<\/code>\u7684\u6570\u5b57\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u5217\u8868\u63a8\u5bfc\u5f0f<\/strong><\/h2>\n
\u5217\u8868\u63a8\u5bfc\u5f0f\u662fPython\u4e2d\u5feb\u901f\u521b\u5efa\u5217\u8868\u7684\u7b80\u6d01\u65b9\u6cd5\uff0c\u80fd\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6548\u7387\u3002<\/p>\n<\/p>\n
2.1 \u4ec0\u4e48\u662f\u5217\u8868\u63a8\u5bfc\u5f0f<\/h2>\n<\/p>\n
\u5217\u8868\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u4ece\u73b0\u6709\u5217\u8868\u751f\u6210\u65b0\u5217\u8868\u7684\u8bed\u6cd5\u7ed3\u6784\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u660e\u7684\u65b9\u5f0f\u6765\u521b\u5efa\u5217\u8868\uff0c\u901a\u5e38\u6bd4\u4f7f\u7528for<\/code>\u5faa\u73af\u66f4\u5feb\u3002<\/p>\n<\/p>\n
2.2 \u5217\u8868\u63a8\u5bfc\u5f0f\u7684\u4f18\u70b9<\/h2>\n<\/p>\n
\u5217\u8868\u63a8\u5bfc\u5f0f\u4e0d\u4ec5\u80fd\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\uff0c\u8fd8\u80fd\u63d0\u9ad8\u6267\u884c\u901f\u5ea6\uff0c\u56e0\u4e3a\u5b83\u5728\u5e95\u5c42\u4ee5C\u8bed\u8a00\u5b9e\u73b0\uff0c\u6267\u884c\u6548\u7387\u66f4\u9ad8\u3002<\/p>\n<\/p>\n
2.3 \u5217\u8868\u63a8\u5bfc\u5f0f\u7684\u4f7f\u7528<\/h2>\n<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
squares = [x2 for x in range(10)]<\/p>\n
print(squares)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be5\u793a\u4f8b\u751f\u6210\u4e86\u4e00\u4e2a\u5305\u542b0\u52309\u7684\u5e73\u65b9\u6570\u7684\u5217\u8868\u3002<\/p>\n<\/p>\n
\u4e09\u3001itertools\u6a21\u5757<\/strong><\/h2>\n
itertools\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u7ec4\u7528\u4e8e\u9ad8\u6548\u904d\u5386\u7684\u51fd\u6570\u548c\u5de5\u5177\u3002<\/p>\n<\/p>\n
3.1 itertools\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<\/p>\n
itertools<\/code>\u6a21\u5757\u5305\u542b\u8bb8\u591a\u9ad8\u6548\u7684\u8fed\u4ee3\u5668\u751f\u6210\u51fd\u6570\uff0c\u5982count<\/code>\u3001cycle<\/code>\u3001repeat<\/code>\u7b49\u3002\u8fd9\u4e9b\u5de5\u5177\u53ef\u7528\u4e8e\u521b\u5efa\u590d\u6742\u7684\u8fed\u4ee3\u903b\u8f91\u3002<\/p>\n<\/p>\n
3.2 itertools\u7684\u4f18\u70b9<\/h2>\n<\/p>\n
itertools<\/code>\u6a21\u5757\u7684\u4f18\u70b9\u5728\u4e8e\u5b83\u80fd\u591f\u751f\u6210\u65e0\u9650\u5e8f\u5217\uff0c\u7ec4\u5408\u3001\u6392\u5217\u6570\u636e\uff0c\u5e76\u4ee5\u5185\u5b58\u53cb\u597d\u7684\u65b9\u5f0f\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u3002<\/p>\n<\/p>\n
3.3 itertools\u7684\u4f7f\u7528<\/h2>\n<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528itertools<\/code>\u6a21\u5757\u751f\u6210\u7b1b\u5361\u5c14\u79ef\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
import itertools<\/p>\n
colors = ['red', 'green', 'blue']<\/p>\n
sizes = ['S', 'M', 'L']<\/p>\n
for tshirt in itertools.product(colors, sizes):<\/p>\n
    print(tshirt)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6b64\u793a\u4f8b\u751f\u6210\u4e86\u989c\u8272\u548c\u5c3a\u5bf8\u7684\u6240\u6709\u53ef\u80fd\u7ec4\u5408\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5e76\u884c\u5904\u7406<\/strong><\/h2>\n
\u5728\u5904\u7406\u5927\u6570\u636e\u96c6\u65f6\uff0c\u5e76\u884c\u5904\u7406\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u904d\u5386\u6548\u7387\u3002<\/p>\n<\/p>\n
4.1 \u5e76\u884c\u5904\u7406\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<\/p>\n
\u5e76\u884c\u5904\u7406\u901a\u8fc7\u540c\u65f6\u6267\u884c\u591a\u4e2a\u64cd\u4f5c\u6765\u52a0\u901f\u5904\u7406\u8fc7\u7a0b\u3002Python\u4e2d\u5e38\u7528\u7684\u5e76\u884c\u5904\u7406\u5e93\u5305\u62ecmultiprocessing<\/code>\u548cconcurrent.futures<\/code>\u3002<\/p>\n<\/p>\n
4.2 \u5e76\u884c\u5904\u7406\u7684\u4f18\u70b9<\/h2>\n<\/p>\n
\u901a\u8fc7\u5e76\u884c\u5904\u7406\uff0c\u53ef\u4ee5\u5145\u5206\u5229\u7528\u591a\u6838CPU\u7684\u6027\u80fd\uff0c\u4ece\u800c\u52a0\u901f\u6570\u636e\u7684\u904d\u5386\u548c\u5904\u7406\u3002<\/p>\n<\/p>\n
4.3 \u5e76\u884c\u5904\u7406\u7684\u4f7f\u7528<\/h2>\n<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528concurrent.futures<\/code>\u6a21\u5757\u8fdb\u884c\u5e76\u884c\u5904\u7406\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
from concurrent.futures import ThreadPoolExecutor<\/p>\n
def process_data(data):<\/p>\n
    return data * 2<\/p>\n
data_list = [1, 2, 3, 4, 5]<\/p>\n
with ThreadPoolExecutor() as executor:<\/p>\n
    results = list(executor.map(process_data, data_list))<\/p>\n
print(results)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6b64\u793a\u4f8b\u5c06\u6570\u636e\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u4e58\u4ee52\uff0c\u5e76\u4f7f\u7528\u7ebf\u7a0b\u6c60\u52a0\u901f\u5904\u7406\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u4f18\u5316\u6570\u636e\u7ed3\u6784<\/strong><\/h2>\n
\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7ed3\u6784\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u904d\u5386\u6548\u7387\u3002<\/p>\n<\/p>\n
5.1 \u6570\u636e\u7ed3\u6784\u7684\u91cd\u8981\u6027<\/h2>\n<\/p>\n
\u4e0d\u540c\u7684\u6570\u636e\u7ed3\u6784\u5728\u5b58\u50a8\u548c\u68c0\u7d22\u6570\u636e\u65f6\u6548\u7387\u4e0d\u540c\u3002\u9009\u62e9\u6b63\u786e\u7684\u6570\u636e\u7ed3\u6784\u53ef\u4ee5\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u64cd\u4f5c\uff0c\u63d0\u9ad8\u904d\u5386\u6548\u7387\u3002<\/p>\n<\/p>\n
5.2 \u5e38\u7528\u6570\u636e\u7ed3\u6784\u53ca\u5176\u4f18\u70b9<\/h2>\n<\/p>\n