{"id":93851,"date":"2020-04-17T21:36:49","date_gmt":"2020-04-17T13:36:49","guid":{"rendered":"http:\/\/4563.org\/?p=93851"},"modified":"2020-04-17T21:36:49","modified_gmt":"2020-04-17T13:36:49","slug":"%e4%b8%80%e7%82%b9%e7%96%91%e9%97%ae","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=93851","title":{"rendered":"\u4e00\u70b9\u7591\u95ee"},"content":{"rendered":"
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\u4e00\u70b9\u7591\u95ee <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : iamdaguduizhang <\/span> <\/i> 25<\/span> <\/div>\n
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a = 'aaaa' print(id(a)) del a b = 'aaaa' print(id(b))  # \u4e3a\u4ec0\u4e48\u4e24\u6b21\u6253\u5370\u51fa\u7684\u5185\u5b58\u5730\u5740\u662f\u4e00\u6837\u7684,\u770b\u8d77\u6765 del a \u4e4b\u540e'aaaa'\u5e76\u6ca1\u6709\u88ab\u5783\u573e\u56de\u6536\uff0c\u5f15\u7528\u8ba1\u6570\u4e0d\u662f\u5177\u6709\u5b9e\u65f6\u6027\u5417\uff1f # \u5982\u679c\u662f\u5728\u4ea4\u4e92\u5f0f ipython \u4e0b\uff0c\u4e24\u6b21\u6253\u5370\u5012\u662f\u4e0d\u4e00\u6837\u7684\u3002emm \u770b\u4e86 py \u6587\u4ef6\u7684\u8fd0\u884c\u673a\u5236\u4e5f\u6ca1\u6709\u641e\u6e05\u695a\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u80fd\u662f\u8fd9\u4e2a\u8fd0\u884c\u673a\u5236\u770b\u7684\u4e0d\u662f\u5f88\u900f\u5f7b\uff0c\u6c42\u5927\u4f6c\u6307\u70b9\u3002 <\/code><\/pre>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (13<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : xcstream <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u2018aaaa\u2019\u662f\u5e38\u91cf\u4e86 \u56fa\u5b9a\u4f4f\u5185\u5b58\u5730\u5740                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : xcstream <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 ipython \u5728\u542f\u52a8\u540e\u6ca1\u6709’aaaa’ \u9700\u8981\u751f\u6210\u4e00\u4e2a\u65b0\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : TanLeDeDaNong <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5177\u4f53\u53ef\u4ee5\u67e5\u4e0b python \u7684\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u6709\u4e2a\u95ee\u9898\u601d\u8003\u4e00\u4e0b\uff1a1. python \u662f\u4e0d\u662f del \u4e4b\u540e\u9a6c\u4e0a\u5783\u573e\u56de\u6536\uff0c \u6211\u7406\u89e3\u7684\u5e76\u4e0d\u662f \uff0c\u662f\u6709\u5ef6\u65f6\u7684\u30022. \u4e3a\u4ec0\u4e48\u547d\u4ee4\u884c\u4f1a\u56de\u6536\uff0c\u4f60\u53ef\u4ee5\u5c1d\u8bd5 sleep \u4e00\u4e0b\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : xiri <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u53d1\u751f\u5b57\u7b26\u4e32\u9a7b\u7559\u4e86\uff0cCpython \u5728\u7f16\u8bd1\u4f18\u5316\u65f6\u4f1a\u5c1d\u8bd5\u91cd\u590d\u4f7f\u7528\u5df2\u7ecf\u5b58\u5728\u7684\u4e0d\u53ef\u53d8\u5bf9\u8c61\u800c\u4e0d\u662f\u6bcf\u6b21\u90fd\u521b\u5efa\u4e00\u4e2a\u65b0\u5bf9\u8c61\uff08\u5f53\u7136\uff0c\u8981\u6ee1\u8db3\u4e00\u5b9a\u7684\u6761\u4ef6\uff09                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : iamdaguduizhang <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @TanLeDeDaNong emm 1.\u5783\u573e\u56de\u6536\u4e0d\u662f\u4e00\u4e2a del \u90a3\u4e48\u7b80\u5355\u8bf6\u30022.\u548c sleep \u6ca1\u6709\u5173\u7cfb\u7684\u3002\u4f9d\u7136\u611f\u8c22                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : iamdaguduizhang <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @xiri \u4f60\u662f\u8bf4\u7c7b\u4f3c\u4e8e\u5c0f\u6574\u6570\u5bf9\u8c61\u6c60\u7684\u90a3\u4e2a\u561b\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : iamdaguduizhang <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @xcstream \u56fa\u5b9a\u4f4f\u5185\u5b58\u5730\u5740\uff1f \u6211\u5728 del \u524d\u6253\u5370\u4e86\u5f15\u7528\u8ba1\u6570\u53d1\u73b0\u662f 4 \u8bf6\uff0c                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : chenstack <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7684\u786e\u662f\u6709\u5b57\u7b26\u4e32\u9a7b\u7559\u4e86\uff0c\u4f46\u5373\u4f7f\u6ca1\u6709\u9a7b\u7559\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b id \u4e5f\u662f\u4e00\u6837\u7684
    a = object()
    print(id(a))
    del a
    b = object()
    print(id(b))                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : xiri <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @iamdaguduizhang \u4f60\u53ef\u4ee5\u6253\u5370\u4e00\u4e0b”aaaa”\u7684\u5f15\u7528\u8ba1\u6570\uff0ca \u53d8\u91cf\u88ab\u5220\u6389\u4e86\uff0c\u4f46\u662f”aaaa”\u8fd9\u4e2a\u5e38\u91cf\u6ca1\u6709\u54e6
    import sys
    a = “aaaa”
    print(sys.getrefcount(“aaaa”))
    del a
    print(sys.getrefcount(“aaaa”))
    b = “aaaa”
    c = “aaaa”
    print(sys.getrefcount(“aaaa”))<\/p>\n
    \u4f60\u53ef\u4ee5\u8bd5\u4e00\u4e0b\u4e0a\u9762\u7684\u4ee3\u7801\uff0c\u8f93\u51fa\u662f 4 \u30013 \u30015\uff0cdel a \u4e4b\u540e”aaaa”\u7684\u5f15\u7528\u51cf\u4e86 1\uff0c\u4f46\u662f\u5e76\u6ca1\u6709\u88ab\u5220\u6389\uff0c\u5982\u679c\u6253\u5370\u4e00\u4e0b a\uff0cb\uff0cc \u7684 id \u4f1a\u53d1\u73b0\u90fd\u662f\u4e00\u6837\u7684\uff0c\u4ed6\u4eec\u90fd\u6307\u5411\u5185\u5b58\u4e2d\u540c\u4e00\u4e2a\u5b57\u7b26\u4e32\u5bf9\u8c61\u3002\u53ef\u4ee5\u770b\u4e00\u4e0b\u4e0b\u9762\u8fd9\u4e2a\u8bf4\u660e\uff0c\u8fd9\u662f Cpython \u7684\u4e00\u79cd\u7f16\u8bd1\u4f18\u5316
    https:\/\/github.com\/leisurelicht\/wtfpython-cn#-strings-can-be-tricky-sometimes%E5%BE%AE%E5%A6%99%E7%9A%84%E5%AD%97%E7%AC%A6%E4%B8%B2-                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : pompeii <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 >>> import gc
    >>> a = ‘aaa’
    >>> id(a)
    77627920L
    >>> del a
    >>> gc.collect()
    0
    >>> b = ‘aaa’
    >>> id(b)
    77629040L<\/p>\n
    \u6240\u4ee5\u5783\u573e\u56de\u6536\u5e94\u8be5\u4e0d\u662f\u5b9e\u65f6\u7684                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : iamdaguduizhang <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @xiri \u6069\u6069\uff0c\u611f\u8c22\u3002\u6211\u660e\u767d\u4f60\u8bf4\u7684\u5b57\u7b26\u4e32\u9a7b\u7559\u4e86\u3002 \u770b\u8d77\u6765\u73b0\u5728\u6211\u7684\u7591\u95ee\u53d8\u6210\u4e86\u7b2c\u4e00\u6b21\u6253\u5370\u5f15\u7528\u8ba1\u6570\u7684\u503c\u4e0d\u662f ipython \u91cc\u7684 1 \uff1f \u6240\u4ee5 del \u4e4b\u540e\u8fd8\u662f\u5b57\u7b26\u4e32\u6ca1\u6709\u88ab\u56de\u6536\uff0c\u7136\u540e\u5c31\u51fa\u73b0\u4e86\u5b57\u7b26\u4e32\u9a7b\u7559\u8bf6                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : iamdaguduizhang <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @pompeii emm,\u611f\u89c9\u4e0d\u80fd\u901a\u8fc7 \u4ea4\u4e92\u5f0f\u6709\u65f6\u95f4\u95f4\u9694\u6765\u8bc1\u660e\u5783\u573e\u56de\u6536\u4e0d\u662f\u5b9e\u65f6\u7684\u8bf6\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : iamdaguduizhang <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @chenstack \u611f\u8c22~                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u4e00\u70b9\u7591\u95ee \u8cc7\u6df1\u5927\u4f6c : iamda…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/93851"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=93851"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/93851\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=93851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=93851"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=93851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}