{"id":204200,"date":"2025-05-29T09:47:43","date_gmt":"2025-05-29T01:47:43","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204200\/"},"modified":"2025-05-29T09:47:43","modified_gmt":"2025-05-29T01:47:43","slug":"python-%e5%a4%9a%e8%bf%9b%e7%a8%8b%e4%b8%ad%e4%bd%bf%e7%94%a8-for-%e5%be%aa%e7%8e%af-join-%e8%bf%9b%e7%a8%8b%ef%bc%8c%e4%bc%9a%e6%8f%90%e5%89%8d%e6%89%93%e5%8d%b0%e5%ae%8c%e6%88%90%e4%bf%a1%e6%81%af","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204200\/","title":{"rendered":"Python \u591a\u8fdb\u7a0b\u4e2d\u4f7f\u7528 for \u5faa\u73af join \u8fdb\u7a0b\uff0c\u4f1a\u63d0\u524d\u6253\u5370\u5b8c\u6210\u4fe1\u606f\u5417\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Python \u591a\u8fdb\u7a0b\u4e2d\u4f7f\u7528 for \u5faa\u73af join \u8fdb\u7a0b\uff0c\u4f1a\u63d0\u524d\u6253\u5370\u5b8c\u6210\u4fe1\u606f\u5417\uff1f<\/h1>\n

\u5728\u6587\u7ae0\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300aPython \u591a\u8fdb\u7a0b\u4e2d\u4f7f\u7528 for \u5faa\u73af join \u8fdb\u7a0b\uff0c\u4f1a\u63d0\u524d\u6253\u5370\u5b8c\u6210\u4fe1\u606f\u5417\uff1f\u300b\uff0c\u804a\u804a\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n

<\/p>\n

python\u591a\u8fdb\u7a0b\u4e2d\u901a\u8fc7for\u5faa\u73afjoin\u53ef\u80fd\u5f15\u53d1\u7684\u95ee\u9898<\/strong><\/p>\n

\u95ee\u9898\u63cf\u8ff0\uff1a<\/strong><\/p>\n

\u5728\u4f7f\u7528python\u7684\u591a\u8fdb\u7a0b\u6a21\u5757\u65f6\uff0c\u5f00\u53d1\u8005\u53ef\u80fd\u4f1a\u901a\u8fc7for\u5faa\u73af\u6765\u9010\u4e2ajoin\u8fdb\u7a0b\u3002\u5f53\u5faa\u73af\u5230\u67d0\u4e2a\u8fdb\u7a0b\u65f6\uff0c\u5982\u679c\u8be5\u8fdb\u7a0b\u5df2\u6267\u884c\u5b8c\u6bd5\uff0c\u90a3\u4e48\u662f\u5426\u4f1a\u51fa\u73b0\u4e3b\u8fdb\u7a0b\u63d0\u524d\u6253\u5370\u5b8c\u6210\u4fe1\u606f\u7684\u60c5\u51b5\uff1f<\/p>\n

\u4f8b\u5982\uff0c\u4e0b\u8ff0\u4ee3\u7801\u4f1a\u521b\u5efa10\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u5e76\u5728for\u5faa\u73af\u4e2djoin\u5b83\u4eec\uff1a<\/p>\n

import os\nfrom multiprocessing import process\n\ndef func(num):\n    print('in func', num, os.getpid(), os.getppid())\n\nif __name__ == '__main__':\n    print('in main', os.getpid(), os.getppid())\n    p_l = []\n    for i in range(10):\n        p = process(target=func, args=(i,))\n        p.start()\n        p_l.append(p)\n    print(p_l)\n    for p in p_l:\n        p.join()\n    print('\u4e3b\u8fdb\u7a0b \u7684 \u4ee3\u7801\u6267\u884c\u7ed3\u675f\u4e86')<\/pre>\n
\u5206\u6790\uff1a<\/strong><\/p>\n
\u5728\u8be5\u4ee3\u7801\u4e2d\uff0cjoin()\u51fd\u6570\u4f1a\u963b\u585e\u4e3b\u8fdb\u7a0b\uff0c\u76f4\u5230\u5bf9\u5e94\u7684\u5b50\u8fdb\u7a0b\u6267\u884c\u5b8c\u6bd5\u3002\u56e0\u6b64\uff0c\u5982\u679c\u5faa\u73af\u5230\u4e00\u4e2a\u5df2\u5b8c\u6210\u7684\u8fdb\u7a0b\uff0c\u90a3\u4e48\u4e3b\u8fdb\u7a0b\u4e0d\u4f1a\u63d0\u524d\u6253\u5370\u5b8c\u6210\u4fe1\u606f\u3002<\/p>\n
\u672c\u4f8b\u8f93\u51fa\u4e2d\uff0c\u53ef\u4ee5\u770b\u5230\u4e3b\u8fdb\u7a0b\u5728\u6240\u6709\u5b50\u8fdb\u7a0bjoin\u5b8c\u6bd5\u540e\u624d\u6253\u5370\u4e86\u5b8c\u6210\u4fe1\u606f\uff1a<\/p>\n
in main 10388 1160\n[<Process(Process-1, started)>, <Process(Process-2, started)>, <Process(Process-3, started)>, <Process(Process-4, started)>, <Process(Process-5, started)>, <Process(Process-6, started)>, <Process(Process-7, started)>, <Process(Process-8, started)>, <Process(Process-9, started)>, <Process(Process-10, started)>]\nin func 1 5836 10388\nin func 0 12936 10388\nin func 2 12856 10388\nin func 4 13448 10388\nin func 5 12516 10388\nin func 3 5048 10388\nin func 6 6664 10388\nin func 7 12916 10388\nin func 8 12172 10388\nin func 9 6824 10388\n\u4e3b\u8fdb\u7a0b \u7684 \u4ee3\u7801\u6267\u884c\u7ed3\u675f\u4e86<\/pre>\n
\u56e0\u6b64\uff0c\u5728\u672c\u4f8b\u4e2d\uff0c\u5373\u4f7f\u5faa\u73af\u5230\u5df2\u5b8c\u6210\u7684\u5b50\u8fdb\u7a0b\uff0c\u4e3b\u8fdb\u7a0b\u4e5f\u4e0d\u4f1a\u63d0\u524d\u6253\u5370\u5b8c\u6210\u4fe1\u606f\u3002\u8fd9\u662f\u56e0\u4e3ajoin()\u51fd\u6570\u963b\u585e\u4e86\u4e3b\u8fdb\u7a0b\uff0c\u786e\u4fdd\u6240\u6709\u5b50\u8fdb\u7a0b\u90fd\u6267\u884c\u5b8c\u6bd5\u540e\u518d\u7ee7\u7eed\u6267\u884c\u3002<\/p>\n
\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300aPython \u591a\u8fdb\u7a0b\u4e2d\u4f7f\u7528 for \u5faa\u73af join \u8fdb\u7a0b\uff0c\u4f1a\u63d0\u524d\u6253\u5370\u5b8c\u6210\u4fe1\u606f\u5417\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Python \u591a\u8fdb\u7a0b\u4e2d\u4f7f\u7528 fo...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-204200","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204200","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=204200"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204200\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204200"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204200"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}