{"id":34,"date":"2021-01-19T08:23:00","date_gmt":"2021-01-19T08:23:00","guid":{"rendered":"https:\/\/tensor.agenthub.uk\/?p=34"},"modified":"2024-05-21T02:53:53","modified_gmt":"2024-05-21T02:53:53","slug":"python%e5%a4%9a%e8%bf%9b%e7%a8%8b%e5%85%b1%e4%ba%ab%e5%af%b9%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/tensorzen.blog\/?p=34","title":{"rendered":"Python\u591a\u8fdb\u7a0b\u95f4\u5171\u4eab\u5bf9\u8c61"},"content":{"rendered":"\n

\u5f00\u53d1\u5e76\u884c\u7a0b\u5e8f\u7684\u65f6\u5019\uff0c\u4f1a\u78b0\u5230\u5728\u4e0d\u540c\u8fdb\u7a0b\u8bbf\u95ee\u540c\u4e00\u4e2a\u5bf9\u8c61\u7684\u60c5\u51b5\uff0cpython\u4e0b\u9762\u6709\u4e2amultiprocessing.Manager\uff0c\u4f7f\u7528\u8fd9\u4e2a\u7c7b\uff0c\u53ef\u4ee5\u521b\u5efa\u5171\u4eab\u5bf9\u8c61(shared object)\uff0c\u5176\u4ed6\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u901a\u8fc7proxy\u8bbf\u95ee\u8fd9\u4e2a\u8fd9\u4e9b\u5171\u4eab\u5bf9\u8c61\u4e86\u3002<\/p>\n\n\n\n

\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5b9a\u4e49\u4e00\u4e2a\u5171\u4eab\u7684list\u5bf9\u8c61\uff0c\u6709\u4e24\u4e2a\u5199\u8fdb\u7a0b\u5165\uff0c\u4ed6\u4eec\u6bcf\u79d2\u5728\u8fd9\u4e2alist\u5199\u5165”PID:\u8fdb\u7a0bID, NUM:\u968f\u673a\u6570”\u8fd9\u6837\u7684\u5185\u5bb9\uff0c\u4e00\u4e2a\u8bfb\u53d6\u8fdb\u7a0b\u6bcf2\u79d2\u8bfb\u53d6\u8fd9\u4e2alist\u7684\u5185\u5bb9\uff1a<\/p>\n\n\n\n

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import<\/span> multiprocessing<\/span><\/span>\nimport<\/span> random<\/span><\/span>\nimport<\/span> time<\/span><\/span>\nimport<\/span> os<\/span><\/span>\n<\/span>\n# \u5199\u5165\u8fdb\u7a0b\u6267\u884c\u7684\u5185\u5bb9<\/span><\/span>\ndef<\/span> <\/span>writer<\/span>(<\/span>my_list<\/span>):<\/span><\/span>\n    pid <\/span>=<\/span> os<\/span>.<\/span>getpid<\/span>()<\/span><\/span>\n    <\/span>while<\/span> <\/span>True<\/span>:<\/span><\/span>\n        time<\/span>.<\/span>sleep<\/span>(<\/span>1<\/span>)<\/span><\/span>\n        my_list<\/span>.<\/span>append<\/span>(<\/span>'<\/span>PID:<\/span>{}<\/span>, NUM:<\/span>{}<\/span>'<\/span>.<\/span>format<\/span>(<\/span>pid<\/span>,<\/span> random<\/span>.<\/span>randint<\/span>(<\/span>0<\/span>,<\/span> <\/span>100<\/span>)))<\/span><\/span>\n<\/span>\n# \u8bfb\u53d6\u8fdb\u7a0b\u6267\u884c\u7684\u5185\u5bb9<\/span><\/span>\ndef<\/span> <\/span>reader<\/span>(<\/span>my_list<\/span>):<\/span><\/span>\n    <\/span>while<\/span> <\/span>True<\/span>:<\/span><\/span>\n        time<\/span>.<\/span>sleep<\/span>(<\/span>2<\/span>)<\/span><\/span>\n        <\/span>if<\/span> <\/span>len<\/span>(<\/span>my_list<\/span>)<\/span> <\/span>><\/span> <\/span>0<\/span>:<\/span><\/span>\n            <\/span>print<\/span>(<\/span>'<\/span>-----------------------------<\/span>'<\/span>)<\/span><\/span>\n            <\/span>print<\/span>(<\/span>'<\/span>\\n<\/span>'<\/span>.<\/span>join<\/span>(<\/span>my_list<\/span>))<\/span><\/span>\n<\/span>\n<\/span>\nif<\/span> __name__ <\/span>==<\/span> <\/span>'<\/span>__main__<\/span>'<\/span>:<\/span><\/span>\n    <\/span>with<\/span> multiprocessing<\/span>.<\/span>Manager<\/span>()<\/span> <\/span>as<\/span> manager<\/span>:<\/span> <\/span># \u521b\u5efamanager\u5bf9\u8c61<\/span><\/span>\n        my_list <\/span>=<\/span> manager<\/span>.<\/span>list<\/span>()<\/span> <\/span># \u5171\u4eab\u5bf9\u8c61my_list<\/span><\/span>\n        wp1 <\/span>=<\/span> multiprocessing<\/span>.<\/span>Process<\/span>(<\/span>target<\/span>=<\/span>writer<\/span>,<\/span> <\/span>args<\/span>=<\/span>(<\/span>my_list<\/span>,<\/span> <\/span>))<\/span><\/span>\n        wp2 <\/span>=<\/span> multiprocessing<\/span>.<\/span>Process<\/span>(<\/span>target<\/span>=<\/span>writer<\/span>,<\/span> <\/span>args<\/span>=<\/span>(<\/span>my_list<\/span>,<\/span> <\/span>))<\/span><\/span>\n        wp1<\/span>.<\/span>start<\/span>()<\/span><\/span>\n        wp2<\/span>.<\/span>start<\/span>()<\/span><\/span>\n<\/span>\n        rp <\/span>=<\/span> multiprocessing<\/span>.<\/span>Process<\/span>(<\/span>target<\/span>=<\/span>reader<\/span>,<\/span> <\/span>args<\/span>=<\/span>(<\/span>my_list<\/span>,<\/span> <\/span>))<\/span><\/span>\n        rp<\/span>.<\/span>start<\/span>()<\/span><\/span>\n<\/span>\n        wp1<\/span>.<\/span>join<\/span>()<\/span><\/span>\n        wp2<\/span>.<\/span>join<\/span>()<\/span><\/span>\n        rp<\/span>.<\/span>join<\/span>()<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4ee3\u7801\u6bd4\u8f83\u7b80\u5355\uff0c\u4e0d\u5e9f\u8bdd\u4e86\u3002<\/p>\n\n\n\n
Manager\u5b9a\u4e49\u5728multiprocessing.managers.py\u6587\u4ef6\u4e0b\u9762\uff0c\u4ece\u6587\u4ef6\u91cc\u770b\uff0cManger()\u6307\u5411\u7684\u5176\u5b9e\u662fSyncManager<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
SyncManager\u7ee7\u627f\u81eaBaseManager\uff0c\u540e\u9762\u5b9a\u4e49\u81ea\u5df1\u7684manager\u8fd8\u4f1a\u7528\u5230BaseManager\u8fd9\u4e2a\u7c7b\u3002<\/p>\n\n\n\n
SyncManager\u7684\u5185\u5bb9:<\/p>\n\n\n\n
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class<\/span> <\/span>SyncManager<\/span>(<\/span>BaseManager<\/span>):<\/span><\/span>\n    <\/span>'''<\/span><\/span>\n    Subclass of `BaseManager` which supports a number of shared object types.<\/span><\/span>\n<\/span>\n    The types registered are those intended for the synchronization<\/span><\/span>\n    of threads, plus `dict`, `list` and `Namespace`.<\/span><\/span>\n<\/span>\n    The `multiprocessing.Manager()` function creates started instances of<\/span><\/span>\n    this class.<\/span><\/span>\n    <\/span>'''<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u4e0d\u662f\u6211\u61d2\uff0c\u662f\u5b83\u786e\u5b9e\u4ec0\u4e48\u90fd\u6ca1\u6709\uff5e\u771f\u7684\u5c31\u53ea\u7ee7\u627f\u4e86BaseManager\uff0cSyncManager\u4e3b\u8981\u5e72\u7684\u6d3b\u662f\u8c03\u7528register\u6765\u6ce8\u518c\u4e00\u4e9b\u53ef\u4ee5\u901a\u8fc7proxy\u8bbf\u95ee\u7684\u5bf9\u8c61\uff0c\u6bd4\u5982\u4e0a\u9762\u6211\u4eec\u7528\u5230\u7684list\u5bf9\u8c61\uff0cmanagers.py\u6587\u4ef6\u91cc\u662f\u8fd9\u4e48\u6ce8\u518clist\u5bf9\u8c61\u7684\uff1a<\/p>\n\n\n\n
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SyncManager<\/span>.<\/span>register<\/span>(<\/span>'<\/span>list<\/span>'<\/span>,<\/span> <\/span>list<\/span>,<\/span> ListProxy<\/span>)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
register\u662fBaseManager\u7684\u7c7b\u65b9\u6cd5\uff0c\u957f\u8fd9\u6837\uff1a<\/p>\n\n\n\n
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@<\/span>classmethod<\/span><\/span>\ndef<\/span> <\/span>register<\/span>(<\/span>cls<\/span>,<\/span> <\/span>typeid<\/span>,<\/span> <\/span>callable<\/span>=None<\/span>,<\/span> <\/span>proxytype<\/span>=None<\/span>,<\/span> <\/span>exposed<\/span>=None<\/span>,<\/span><\/span>\n             <\/span>method_to_typeid<\/span>=None<\/span>,<\/span> <\/span>create_method<\/span>=True<\/span>):<\/span><\/span>\n    <\/span>'''<\/span><\/span>\n    Register a typeid with the manager type<\/span><\/span>\n    <\/span>'''<\/span><\/span>\n    <\/span>if<\/span> <\/span>'<\/span>_registry<\/span>'<\/span> <\/span>not<\/span> <\/span>in<\/span> <\/span>cls<\/span>.<\/span>__dict__<\/span>:<\/span><\/span>\n        <\/span>cls<\/span>.<\/span>_registry <\/span>=<\/span> <\/span>cls<\/span>.<\/span>_registry<\/span>.<\/span>copy<\/span>()<\/span><\/span>\n<\/span>\n    <\/span>if<\/span> proxytype <\/span>is<\/span> <\/span>None<\/span>:<\/span><\/span>\n        proxytype <\/span>=<\/span> AutoProxy<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
BaseManager\u7c7b\u7684_registry\u91cc\u9762\u4fdd\u5b58\u4e86\u6240\u6709\u6ce8\u518c\u8fc7\u7684\u7c7b\u578b\uff0c\u770b\u4e0b\u9762\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u5982\u679cproxytype\u662f\u7a7a\u7684\u8bdd\uff0c\u4f1a\u8c03\u7528AutoProxy\u3002<\/p>\n\n\n\n
\u4e0a\u9762\u626f\u4e86\u8fd9\u4e48\u591a\uff0c\u5982\u679c\u6211\u4eec\u60f3\u5171\u4eab\u4e00\u4e2a\u81ea\u5df1\u7684\u5b9a\u4e49\u7684\u7c7b\uff0c\u600e\u4e48\u505a\uff1f\u4eff\u7167SyncManger\u7684\u5199\u6cd5\u5c31\u53ef\u4ee5\u4e86\uff0c\u5b98\u65b9\u4f8b\u5b50\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n
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from<\/span> multiprocessing<\/span>.<\/span>managers <\/span>import<\/span> BaseManager<\/span><\/span>\n<\/span>\nclass<\/span> <\/span>MathsClass<\/span>:<\/span><\/span>\n    <\/span>def<\/span> <\/span>add<\/span>(<\/span>self<\/span>,<\/span> <\/span>x<\/span>,<\/span> <\/span>y<\/span>):<\/span><\/span>\n        <\/span>return<\/span> x <\/span>+<\/span> y<\/span><\/span>\n    <\/span>def<\/span> <\/span>mul<\/span>(<\/span>self<\/span>,<\/span> <\/span>x<\/span>,<\/span> <\/span>y<\/span>):<\/span><\/span>\n        <\/span>return<\/span> x <\/span>*<\/span> y<\/span><\/span>\n<\/span>\nclass<\/span> <\/span>MyManager<\/span>(<\/span>BaseManager<\/span>):<\/span><\/span>\n    <\/span>pass<\/span><\/span>\n<\/span>\nMyManager<\/span>.<\/span>register<\/span>(<\/span>'<\/span>Maths<\/span>'<\/span>,<\/span> MathsClass<\/span>)<\/span><\/span>\n<\/span>\nif<\/span> __name__ <\/span>==<\/span> <\/span>'<\/span>__main__<\/span>'<\/span>:<\/span><\/span>\n    <\/span>with<\/span> <\/span>MyManager<\/span>()<\/span> <\/span>as<\/span> manager<\/span>:<\/span><\/span>\n        maths <\/span>=<\/span> manager<\/span>.<\/span>Maths<\/span>()<\/span><\/span>\n        <\/span>print<\/span>(<\/span>maths<\/span>.<\/span>add<\/span>(<\/span>4<\/span>,<\/span> <\/span>3<\/span>))<\/span>         <\/span># prints 7<\/span><\/span>\n        <\/span>print<\/span>(<\/span>maths<\/span>.<\/span>mul<\/span>(<\/span>7<\/span>,<\/span> <\/span>8<\/span>))<\/span>         <\/span># prints 56<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\u5e94\u8be5\u8fd8\u662f\u86ee\u7b80\u5355\u7684\uff0c\u5982\u679c\u60f3\u5728\u81ea\u5df1\u7684manager\u7c7b\u91cc\u9762\u6ce8\u518clist\uff0c\u53ef\u4ee5\u4eff\u7167SyncManager\u7684\u5199\u6cd5,MyManager.register(‘list’, list, ListProxy)\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Python\u901a\u8fc7multiprocessing.Manager\u5b9e\u73b0\u591a\u8fdb\u7a0b\u95f4\u7684\u5bf9\u8c61\u5171\u4eab\u3002\u901a\u8fc7\u7ee7\u627fmanagers.BaseManager\u8fd8\u53ef\u4ee5\u81ea\u5b9a\u4e49\u5171\u4eab\u5bf9\u8c61\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[8,9],"class_list":["post-34","post","type-post","status-publish","format-standard","hentry","category-coding","tag-parallelism","tag-python"],"_links":{"self":[{"href":"https:\/\/tensorzen.blog\/index.php?rest_route=\/wp\/v2\/posts\/34","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tensorzen.blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tensorzen.blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tensorzen.blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tensorzen.blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=34"}],"version-history":[{"count":2,"href":"https:\/\/tensorzen.blog\/index.php?rest_route=\/wp\/v2\/posts\/34\/revisions"}],"predecessor-version":[{"id":503,"href":"https:\/\/tensorzen.blog\/index.php?rest_route=\/wp\/v2\/posts\/34\/revisions\/503"}],"wp:attachment":[{"href":"https:\/\/tensorzen.blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=34"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tensorzen.blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=34"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tensorzen.blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=34"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}