{"id":761,"date":"2024-12-08T10:27:10","date_gmt":"2024-12-08T02:27:10","guid":{"rendered":"http:\/\/www.chan.ink\/?p=761"},"modified":"2024-12-08T10:27:13","modified_gmt":"2024-12-08T02:27:13","slug":"%e3%80%90python%e3%80%91%e7%b1%bb%e5%92%8c%e5%ae%9e%e4%be%8b%e5%85%b3%e7%b3%bb%e7%9a%84%e9%83%a8%e5%88%86%e7%bb%86%e8%8a%82%e6%8e%a2%e7%b4%a2","status":"publish","type":"post","link":"http:\/\/www.chan.ink\/index.php\/2024\/12\/08\/%e3%80%90python%e3%80%91%e7%b1%bb%e5%92%8c%e5%ae%9e%e4%be%8b%e5%85%b3%e7%b3%bb%e7%9a%84%e9%83%a8%e5%88%86%e7%bb%86%e8%8a%82%e6%8e%a2%e7%b4%a2\/","title":{"rendered":"\u3010Python\u3011\u7c7b\u548c\u5b9e\u4f8b\u5173\u7cfb\u7684\u90e8\u5206\u7ec6\u8282\u63a2\u7d22"},"content":{"rendered":"\n
class IT(object):\n    def __init__(self):\n        self.counter = 0\n\n    def __iter__(self):\n        return self\n\n    def __next__(self):\n        self.counter += 1\n        if self.counter == 3:\n            raise StopIteration()\n        return self.counter\n\nfor item in obj3:  \n    print(item\n\n\u8fd9\u91cc\u8fed\u4ee3\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u56e0\u4e3a\u4e4b\u524d\u9047\u5230\u7684\u90fd\u662f\u8fed\u4ee3\u5217\u8868\uff0c\u5b57\u5178\u7b49\uff0c\u8fd9\u5f15\u8d77\u4e86\u6211\u7684\u597d\u5947\u3002\n\u8d77\u521d\uff0c\u6211\u4ee5\u4e3a\uff0c\u751f\u6210\u5b9e\u4f8b\u5c31\u662f\u7c7b\u4f3c\u4e8e\u590d\u5236\u7c7b\uff0c\u4e8e\u662f\u95ee\u4e86GPT\u5982\u4e0b\u7684\u95ee\u9898<\/code><\/pre>\n\n\n\n
1.\u8fd9\u4e2a\u5b9e\u4f8b\u7684\u5b9e\u9645\u4ee3\u7801\u7ed3\u6784\uff0c\u5e94\u8be5\u662f\u600e\u4e48\u6837\u7684\u5462\u3002<\/p>\n\n\n\n
2.\u6211\u8fd8\u4ee5\u4e3a\u751f\u6210\u7684\u5b9e\u4f8b\u65f6\u7c7b\u4f3c\u4e8e\u8fd9\u6837
class obj3():
def init<\/strong>(self):    
self.counter = 0<\/p>\n\n\n\n
def __iter__(self):\n    return self\n\ndef __next__(self):\n    self.counter += 1\n    if self.counter == 3:\n        raise StopIteration()\n    return self.counter&nbsp;<\/p>\n\n\n\n
\u4ee5\u4e0b\u662fGPT\u7684\u56de\u7b54<\/p>\n\n\n\n
\u4f60\u731c\u6d4b\u7684\u8fd9\u79cd\u751f\u6210\u5b9e\u4f8b\u65b9\u5f0f\uff0c\u4ece\u6982\u5ff5\u4e0a\u662f\u6b63\u786e\u7684\uff0c\u4f46\u5728\u5b9e\u9645\u4ee3\u7801\u6267\u884c\u4e2d\u5e76\u4e0d\u662f Python \u7684\u8fd0\u884c\u673a\u5236\u3002\u8ba9\u6211\u4eec\u8be6\u7ec6\u6bd4\u8f83\u548c\u8bf4\u660e\u4f60\u8ba4\u4e3a\u7684\u751f\u6210\u5b9e\u4f8b\u65b9\u5f0f\u4e0e Python \u5b9e\u9645\u7684\u884c\u4e3a\u3002<\/p>\n\n\n\n
\n\n\n\n
\u4f60\u8ba4\u4e3a\u7684\u65b9\u5f0f<\/strong><\/h3>\n\n\n\n
\u4f60\u731c\u6d4b\u5f53\u6267\u884c obj3 = IT()<\/code> \u65f6\uff0cPython \u4f1a\u81ea\u52a8\u5c06\u5b9e\u4f8b\u5316\u540e\u7684 obj3<\/code> \u62f7\u8d1d\u4e3a\u7c7b\u4f3c\u4ee5\u4e0b\u5f62\u5f0f\uff1a<\/p>\n\n\n\n
python\u590d\u5236\u4ee3\u7801class obj3():\n    def __init__(self):\n        self.counter = 0\n\n    def __iter__(self):\n        return self\n\n    def __next__(self):\n        self.counter += 1\n        if self.counter == 3:\n            raise StopIteration()\n        return self.counter\n<\/code><\/pre>\n\n\n\n
\u4ece\u903b\u8f91\u4e0a\uff0c\u8fd9\u786e\u5b9e\u662f\u5bf9\u5b9e\u4f8b\u884c\u4e3a\u7684\u7b49\u6548\u6a21\u62df\uff1a\u5b9e\u4f8b obj3<\/code> \u4f1a\u62e5\u6709\u7c7b\u7684\u6240\u6709\u65b9\u6cd5\u548c\u5c5e\u6027\uff0c\u5e76\u4e14\u8fd9\u4e9b\u65b9\u6cd5\u4f1a\u7ed1\u5b9a\u5230\u5b9e\u4f8b\u672c\u8eab\u3002\u8fd9\u770b\u8d77\u6765\u5c31\u50cf\u662f IT<\/code> \u7c7b\u88ab\u590d\u5236\u6210\u4e00\u4e2a\u65b0\u7684\u7c7b obj3<\/code>\u3002<\/p>\n\n\n\n
\u4f46\u5728 Python \u5b9e\u9645\u8fd0\u884c\u4e2d\uff0c\u8fd9\u79cd\u201c\u590d\u5236\u7c7b\u201d\u7684\u8fc7\u7a0b\u5e76\u4e0d\u5b58\u5728\u3002<\/p>\n\n\n\n
\n\n\n\n
Python \u5b9e\u9645\u7684\u884c\u4e3a<\/strong><\/h3>\n\n\n\n
Python \u7684\u5b9e\u9645\u673a\u5236\u66f4\u4e3a\u9ad8\u6548\u548c\u52a8\u6001\u3002\u5f53\u6267\u884c obj3 = IT()<\/code> \u65f6\uff0cPython \u4f1a\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fd0\u884c\uff1a<\/p>\n\n\n\n
    \n
  1. \u521b\u5efa\u5bf9\u8c61<\/strong>\n
      \n
    • Python \u8c03\u7528 IT.__new__()<\/code> \u521b\u5efa\u4e86\u4e00\u4e2a\u7a7a\u5bf9\u8c61\u3002<\/li>\n\n\n\n
    • \u7136\u540e\u8c03\u7528 IT.__init__()<\/code> \u65b9\u6cd5\u521d\u59cb\u5316\u8be5\u5bf9\u8c61\uff0c\u5c06 counter<\/code> \u5c5e\u6027\u8bbe\u7f6e\u4e3a 0<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • \u5bf9\u8c61\u7684\u7ed3\u6784<\/strong>\n
        \n
      • obj3<\/code> \u662f IT<\/code> \u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\u3002\u5b83\u672c\u8eab\u4e0d\u5305\u542b\u7c7b\u5b9a\u4e49\u4e2d\u7684\u65b9\u6cd5\uff08\u5982 __iter__<\/code> \u548c __next__<\/code>\uff09\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u5b58\u50a8\u5728\u7c7b IT<\/code> \u4e2d\u3002<\/li>\n\n\n\n
      • \u5f53\u4f60\u8bbf\u95ee obj3.__iter__<\/code> \u65f6\uff0cPython \u4f1a\u52a8\u6001\u5730\u4ece IT<\/code> \u7c7b\u4e2d\u67e5\u627e __iter__<\/code> \u65b9\u6cd5\uff0c\u5e76\u5c06\u5176\u7ed1\u5b9a\u5230 obj3<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
      • \u5b9e\u4f8b\u548c\u7c7b\u7684\u5173\u7cfb<\/strong>\n
          \n
        • obj3<\/code> \u672c\u8eab\u662f\u4e00\u4e2a\u7a7a\u58f3\uff08\u53ea\u5305\u542b\u52a8\u6001\u5c5e\u6027\uff0c\u5982 counter<\/code>\uff09\u3002<\/li>\n\n\n\n
        • \u7c7b\u7684\u5b9a\u4e49\uff08\u5305\u62ec\u65b9\u6cd5 __iter__<\/code> \u548c __next__<\/code>\uff09\u5b58\u50a8\u5728 IT<\/code> \u7c7b\u4e2d\uff0c\u5b9e\u4f8b\u4f1a\u901a\u8fc7\u7c7b\u52a8\u6001\u8bbf\u95ee\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
          \n\n\n\n
          \u5b9e\u4f8b\u548c\u7c7b\u7684\u5dee\u5f02<\/strong><\/h3>\n\n\n\n
          \u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4ee3\u7801\u9a8c\u8bc1\u5b9e\u4f8b\u548c\u7c7b\u7684\u5173\u7cfb\uff1a<\/p>\n\n\n\n
          \u9a8c\u8bc1\u65b9\u6cd5\u7ed1\u5b9a<\/strong><\/h4>\n\n\n\n
          python\u590d\u5236\u4ee3\u7801class IT:\n    def __init__(self):\n        self.counter = 0\n\n    def __iter__(self):\n        return self\n\n    def __next__(self):\n        self.counter += 1\n        if self.counter == 3:\n            raise StopIteration()\n        return self.counter\n\n# \u521b\u5efa\u5b9e\u4f8b\nobj3 = IT()\n\n# \u9a8c\u8bc1\u5b9e\u4f8b\u7684\u65b9\u6cd5\u662f\u5426\u6765\u81ea\u7c7b\nprint(obj3.__iter__)  # \u8f93\u51fa: <bound method IT.__iter__ of <__main__.IT object at 0x7f7b2c...>>\nprint(obj3.__next__)  # \u8f93\u51fa: <bound method IT.__next__ of <__main__.IT object at 0x7f7b2c...>>\n\n# \u9a8c\u8bc1\u7c7b\u7684\u65b9\u6cd5\nprint(IT.__iter__)    # \u8f93\u51fa: <function IT.__iter__ at 0x7f7b2c...>\nprint(IT.__next__)    # \u8f93\u51fa: <function IT.__next__ at 0x7f7b2c...>\n<\/code><\/pre>\n\n\n\n
            \n
          • \u5b9e\u4f8b\u7ed1\u5b9a\u65b9\u6cd5<\/strong>\uff1a\n
              \n
            • obj3.__iter__<\/code> \u662f\u4ece\u7c7b\u4e2d\u52a8\u6001\u7ed1\u5b9a\u7684\u65b9\u6cd5\u3002<\/li>\n\n\n\n
            • \u8fd9\u610f\u5473\u7740\u65b9\u6cd5\u672c\u8eab\u5b58\u50a8\u5728\u7c7b IT<\/code> \u4e2d\uff0c\u4f46\u5f53\u901a\u8fc7 obj3<\/code> \u8c03\u7528\u65f6\uff0cPython \u4f1a\u5c06\u5b9e\u4f8b obj3<\/code> \u4f5c\u4e3a self<\/code> \u53c2\u6570\u4f20\u9012\u7ed9\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
            • \u7c7b\u7684\u5b9a\u4e49<\/strong>\uff1a\n
                \n
              • \u65b9\u6cd5 __iter__<\/code> \u548c __next__<\/code> \u662f\u7c7b IT<\/code> \u7684\u4e00\u90e8\u5206\uff0c\u4e0d\u4f1a\u88ab\u590d\u5236\u5230\u6bcf\u4e2a\u5b9e\u4f8b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
                \n\n\n\n
                \u5b9e\u4f8b\u5316\u548c\u7c7b\u7684\u5173\u7cfb<\/strong><\/h3>\n\n\n\n
                \u901a\u8fc7 dir(obj3)<\/code> \u548c dir(IT)<\/code> \u53ef\u4ee5\u76f4\u89c2\u5730\u770b\u51fa\u7c7b\u548c\u5b9e\u4f8b\u7684\u5dee\u5f02\u3002<\/p>\n\n\n\n
                \u67e5\u770b\u5b9e\u4f8b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5<\/strong><\/h4>\n\n\n\n
                python\u590d\u5236\u4ee3\u7801obj3 = IT()\nprint(dir(obj3))\n<\/code><\/pre>\n\n\n\n
                \u8f93\u51fa\u5185\u5bb9\uff08\u7b80\u5316\uff09\uff1a<\/p>\n\n\n\n
                css\u590d\u5236\u4ee3\u7801['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__',  '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__',  '__init__', '__iter__', '__le__', '__lt__', '__module__', '__ne__',  '__next__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__',  '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'counter']\n<\/code><\/pre>\n\n\n\n
                  \n
                • counter<\/code> \u662f\u5b9e\u4f8b\u7684\u52a8\u6001\u5c5e\u6027\u3002<\/li>\n\n\n\n
                • \u65b9\u6cd5\uff08\u5982 __iter__<\/code>, __next__<\/code>\uff09\u662f\u4ece\u7c7b IT<\/code> \u52a8\u6001\u67e5\u627e\u5e76\u7ed1\u5b9a\u7684\u3002<\/li>\n<\/ul>\n\n\n\n
                  \u67e5\u770b\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5<\/strong><\/h4>\n\n\n\n
                  python\u590d\u5236\u4ee3\u7801print(dir(IT))\n<\/code><\/pre>\n\n\n\n
                  \u8f93\u51fa\u5185\u5bb9\uff08\u7b80\u5316\uff09\uff1a<\/p>\n\n\n\n
                  css\u590d\u5236\u4ee3\u7801['__class__', '__delattr__', '__dict__', '__doc__', '__eq__', '__format__',  '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__iter__',  '__le__', '__lt__', '__module__', '__ne__', '__next__', '__reduce__',  '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__',  '__subclasshook__', '__weakref__']\n<\/code><\/pre>\n\n\n\n
                    \n
                  • \u7c7b\u4e2d\u5305\u542b __iter__<\/code> \u548c __next__<\/code> \u65b9\u6cd5\u7684\u5b9a\u4e49\u3002<\/li>\n<\/ul>\n\n\n\n
                    \n\n\n\n
                    \u603b\u7ed3\uff1a\u4e3a\u4ec0\u4e48\u5b9e\u4f8b\u4e0d\u662f\u751f\u6210\u4e00\u4e2a\u72ec\u7acb\u7684\u7c7b\uff1f<\/strong><\/h3>\n\n\n\n
                      \n
                    1. \u9ad8\u6548\u6027<\/strong>\uff1a\n
                        \n
                      • Python \u4e0d\u4f1a\u590d\u5236\u7c7b\u7684\u5b9a\u4e49\uff0c\u800c\u662f\u8ba9\u5b9e\u4f8b\u901a\u8fc7\u7c7b\u52a8\u6001\u67e5\u627e\u65b9\u6cd5\uff0c\u8fd9\u6837\u53ef\u4ee5\u8282\u7701\u5185\u5b58\u5e76\u63d0\u9ad8\u6548\u7387\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                      • \u52a8\u6001\u7ed1\u5b9a<\/strong>\uff1a\n
                          \n
                        • \u65b9\u6cd5\u5728\u7c7b\u4e2d\u5b9a\u4e49\uff0c\u5f53\u5b9e\u4f8b\u8c03\u7528\u65b9\u6cd5\u65f6\uff0cPython \u4f1a\u5c06\u5b9e\u4f8b\u672c\u8eab\u7ed1\u5b9a\u4e3a self<\/code>\uff0c\u5b9e\u73b0\u52a8\u6001\u884c\u4e3a\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                        • \u5b9e\u4f8b\u7684\u7ed3\u6784<\/strong>\uff1a\n
                            \n
                          • \u5b9e\u4f8b\u53ea\u5305\u542b\u52a8\u6001\u5c5e\u6027\uff08\u5982 counter<\/code>\uff09\u3002<\/li>\n\n\n\n
                          • \u65b9\u6cd5\u5b58\u50a8\u5728\u7c7b\u4e2d\uff0c\u5b9e\u4f8b\u901a\u8fc7\u7c7b\u52a8\u6001\u8bbf\u95ee\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
                            \n\n\n\n
                            \u4f60\u7684\u731c\u6d4b\u867d\u7136\u903b\u8f91\u6b63\u786e\uff0c\u4f46\u5b9e\u9645\u5b9e\u73b0\u4e2d\uff0cPython \u7684\u5bf9\u8c61\u6a21\u578b\u66f4\u52a0\u52a8\u6001\u548c\u9ad8\u6548\u3002\u5982\u679c\u8fd8\u6709\u7591\u95ee\uff0c\u6211\u4eec\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63a2\u8ba8\uff01<\/p>\n\n\n\n
                            <\/p>\n","protected":false},"excerpt":{"rendered":"
                            1.\u8fd9\u4e2a\u5b9e\u4f8b\u7684\u5b9e\u9645\u4ee3\u7801\u7ed3\u6784\uff0c\u5e94\u8be5\u662f\u600e\u4e48\u6837\u7684\u5462\u3002 2.\u6211\u8fd8\u4ee5\u4e3a\u751f\u6210\u7684\u5b9e\u4f8b\u65f6\u7c7b\u4f3c\u4e8e\u8fd9\u6837class obj3():d […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-761","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts\/761","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/comments?post=761"}],"version-history":[{"count":1,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts\/761\/revisions"}],"predecessor-version":[{"id":762,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts\/761\/revisions\/762"}],"wp:attachment":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/media?parent=761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/categories?post=761"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/tags?post=761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}