{"id":4974,"date":"2021-01-19T18:53:35","date_gmt":"2021-01-19T10:53:35","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=4974"},"modified":"2021-01-19T18:53:35","modified_gmt":"2021-01-19T10:53:35","slug":"python%e5%8d%8f%e7%a8%8b%e4%b9%8bgevent","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/4974","title":{"rendered":"Python\u534f\u7a0b\u4e4bGevent"},"content":{"rendered":"

\u539f\u6587\u5730\u5740<\/a><\/p>\n

<\/div>\n
\n
\n

\u534f\u7a0b\uff0c\u53c8\u79f0\u5fae\u7ebf\u7a0b\uff0c\u5373\u4e3a\u8f7b\u91cf\u7ea7\u7684\u7ebf\u7a0b\u3002
\npython\u4e2d\u5b9e\u73b0\u534f\u7a0b\u662f\u57fa\u4e8eGevent\u6a21\u5757\uff0cGevent\u6a21\u5757\u5185\u90e8\u5c01\u88c5\u4e86greenlet\u6a21\u5757\uff1bgreenlet\u6a21\u5757\u5b9e\u73b0\u4e86\u5728\u5355\u7ebf\u7a0b\u4e2d\u5207\u6362\u72b6\u6001\uff0cGevent\u6a21\u5757\u5728\u6b64\u4e4b\u4e0a\u8fd8\u5b9e\u73b0\u4e86\u9047\u5230I\/O\u64cd\u4f5c\u81ea\u52a8\u5207\u6362\uff0c\u4f7f\u7a0b\u5e8f\u8fd0\u884c\u66f4\u5feb\uff1b\u4f46\u662fGevent\u53ea\u5728\u9047\u5230\u81ea\u5df1\u8ba4\u8bc6\u7684I\/O\u64cd\u4f5c\u65f6\u5207\u6362\uff0c\u6240\u4ee5\u9700\u8981\u4f7f\u7528Gevent\u5305\u7684\u4e00\u4e2a\u6a21\u5757\uff1a\u7334\u5b50\u8865\u4e01\uff0c\u4f7f\u7528\u4e86\u8fd9\u4e2a\u8865\u4e01\uff0cGevent\u4f1a\u76f4\u63a5\u4fee\u6539\u5728\u5b83\u4e4b\u540e\u5bfc\u5165\u7684\u6a21\u5757\u4e2d\u7684I\/O\u64cd\u4f5c\uff0c\u4f7f\u5176\u53ef\u4ee5\u8ba9Gevent\u8bc6\u522b\uff0c\u4ece\u800c\u5f00\u542f\u534f\u7a0b\u3002
\nGreenlet\u4e0eGevent\u6a21\u5757\u90fd\u662fpython\u7684\u7b2c\u4e09\u65b9\u6a21\u5757\uff0c\u9700\u5b89\u88c5\u4f7f\u7528\u3002<\/p>\n

1\u3001Greenlet<\/h1>\n

\u4e3b\u8981\u65b9\u6cd5\uff1a<\/h3>\n

g = greenlet(run=None, parent=None)\uff1a\u5b9e\u4f8b\u5316\u4e00\u4e2agreenlet\u5bf9\u8c61
\ng.parent:\u6bcf\u4e00\u4e2a\u534f\u7a0b\u90fd\u6709\u4e00\u4e2a\u7236\u534f\u7a0b,\u5f53\u524d\u534f\u7a0b\u7ed3\u675f\u540e\u4f1a\u56de\u5230\u7236\u534f\u7a0b\u4e2d\u6267\u884c,\u8be5\u5c5e\u6027\u9ed8\u8ba4\u662f\u521b\u5efa\u8be5\u534f\u7a0b\u7684\u534f\u7a0b
\ng.run: \u8be5\u5c5e\u6027\u662f\u534f\u7a0b\u5b9e\u9645\u8fd0\u884c\u7684\u4ee3\u7801. run\u65b9\u6cd5\u7ed3\u675f\u4e86,\u90a3\u4e48\u8be5\u534f\u7a0b\u4e5f\u5c31\u7ed3\u675f\u4e86
\ng.switch(*args, **kwargs): \u5207\u6362\u5230g\u534f\u7a0b
\ng.throw(): \u5207\u6362\u5230g\u534f\u7a0b,\u63a5\u7740\u629b\u51fa\u4e00\u4e2a\u5f02\u5e38<\/p>\n

\u793a\u4f8b\uff1a<\/h3>\n
from<\/span> greenlet import<\/span> greenlet\r\n\r\ndef<\/span> work<\/span>()<\/span>:<\/span>\r\n    print(\"1\"<\/span>)\r\n    g2.switch() # \u5207\u6362\u5230g2\u534f\u7a0b<\/span>\r\n    print(\"3\"<\/span>)\r\n    g2.switch()\r\n\r\ndef<\/span> work2<\/span>()<\/span>:<\/span>\r\n    print(\"2\"<\/span>)\r\n    g1.switch()\r\n    print(\"4\"<\/span>)\r\n\r\ng1 = greenlet(work)  # \u521b\u5efa\u4e00\u4e2agreenlet\u5b9e\u4f8b<\/span>\r\ng2 = greenlet(work2)\r\ng1.switch() # \u5207\u6362\u5230g1\u534f\u7a0b<\/span><\/code><\/pre>\n
\u7ed3\u679c\uff1a<\/h3>\n
1
\n2
\n3
\n4<\/p>\n
2\u3001Gevent<\/h1>\n
\u793a\u4f8b1\uff1a<\/h3>\n
from<\/span> gevent import<\/span> monkey\r\nmonkey.patch_all()      # monkey\u8865\u4e01\u4f1a\u5c06\u5728\u5b83\u4e4b\u540e\u5bfc\u5165\u7684\u6a21\u5757\u7684IO\u64cd\u4f5c\u6253\u5305\uff0c\u4f7fgevent\u8ba4\u8bc6\u4ed6\u4eec<\/span>\r\nimport<\/span> gevent\r\n\r\ndef<\/span> work1<\/span>()<\/span>:<\/span>\r\n    print(\"1\"<\/span>)\r\n    gevent.sleep(1<\/span>)\r\n    print(\"3\"<\/span>)\r\n\r\ndef<\/span> work2<\/span>()<\/span>:<\/span>\r\n    print(\"2\"<\/span>)\r\n    gevent.sleep(1<\/span>)\r\n    print(\"4\"<\/span>)\r\n\r\ng1 = gevent.spawn(work1)\r\ng2 = gevent.spawn(work2)\r\n\r\n# g1.join()<\/span>\r\n# g2.join()<\/span>\r\n\r\ngevent.joinall([g1,g2])<\/code><\/pre>\n
\u793a\u4f8b2\uff1a\u722c\u53d6\u7f51\u9875<\/h3>\n
from<\/span> gevent import<\/span> monkey;monkey.patch_all()\r\nimport<\/span> gevent\r\nimport<\/span> requests\r\n\r\ndef<\/span> get_url<\/span>(url)<\/span>:<\/span>\r\n    res = requests.get(url)\r\n    print(url,res.status_code,len(res.text))\r\n\r\nurl_l = [\r\n    'http:\/\/www.baidu.com'<\/span>,\r\n    'http:\/\/www.google.com'<\/span>,\r\n    'https:\/\/zh.wikipedia.org\/wiki\/Wikipedia:%E9%A6%96%E9%A1%B5'<\/span>,\r\n    'https:\/\/www.youtube.com\/?app=desktop'<\/span>,\r\n    'https:\/\/www.facebook.com\/'<\/span>,\r\n    'http:\/\/www.python.org'<\/span>,\r\n    'http:\/\/www.cnblogs.com'<\/span>\r\n]\r\ng_l = []\r\nfor<\/span> i in<\/span> url_l:\r\n    g_l.append(gevent.spawn(get_url,i))\r\ngevent.joinall(g_l)<\/code><\/pre>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u539f\u6587\u5730\u5740 \u534f\u7a0b\uff0c\u53c8\u79f0\u5fae\u7ebf\u7a0b\uff0c\u5373\u4e3a\u8f7b\u91cf\u7ea7\u7684<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-4974","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/4974","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=4974"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/4974\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=4974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=4974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=4974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}