{"id":178568,"date":"2024-05-08T19:53:34","date_gmt":"2024-05-08T11:53:34","guid":{"rendered":""},"modified":"2024-05-08T19:53:45","modified_gmt":"2024-05-08T11:53:45","slug":"python%e4%b8%ad-__init__%e7%9a%84%e9%80%9a%e4%bf%97%e8%a7%a3%e9%87%8a%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/178568.html","title":{"rendered":"Python\u4e2d __init__\u7684\u901a\u4fd7\u89e3\u91ca\u662f\u4ec0\u4e48"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27063016\/a766ed07-ebea-40b3-a37b-1a68b1e38406.webp\" alt=\"Python\u4e2d __init__\u7684\u901a\u4fd7\u89e3\u91ca\u662f\u4ec0\u4e48\" \/><\/p>\n<p><p><strong>Python \u4e2d <code>__init__<\/code> \u901a\u4fd7\u89e3\u91ca\u662f\u5bf9\u8c61\u6784\u9020\u5668\u6216\u521d\u59cb\u5316\u65b9\u6cd5<\/strong>\uff0c\u5b83\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u65b9\u6cd5\uff0c\u7528\u4e8e\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u72b6\u6001\u3002\u901a\u8fc7\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u4e3a\u5bf9\u8c61\u8bbe\u7f6e\u6240\u9700\u5c5e\u6027\u7684\u521d\u59cb\u503c\u6216\u6267\u884c\u5bf9\u8c61\u521b\u5efa\u65f6\u5fc5\u8981\u7684\u64cd\u4f5c\u3002<strong><code>__init__<\/code> \u7684\u5b58\u5728\u4fdd\u8bc1\u4e86\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u80fd\u591f\u81ea\u52a8\u6267\u884c\u7279\u5b9a\u7684\u4ee3\u7801<\/strong>\uff0c\u8fd9\u5bf9\u4e8e\u7a0b\u5e8f\u7684\u7075\u6d3b\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n<p><p>\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/p>\n<p>\u5f53\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u7c7b\u7684\u5b9e\u4f8b\u65f6\uff0cPython\u4f1a\u81ea\u52a8\u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\u3002<code>__init__<\/code> \u65b9\u6cd5\u901a\u5e38\u4f1a\u5305\u62ec\u81f3\u5c11\u4e00\u4e2a\u53c2\u6570\uff0c\u5373 <code>self<\/code>\uff0c\u5b83\u662f\u4e00\u4e2a\u6307\u5411\u5b9e\u4f8b\u672c\u8eab\u7684\u5f15\u7528\uff0c\u8fd9\u6837\u6211\u4eec\u53ef\u4ee5\u5728\u65b9\u6cd5\u4e2d\u8bbe\u7f6e\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u521d\u59cb\u72b6\u6001\u3002\u4f7f\u7528 <code>__init__<\/code> \u65b9\u6cd5\u53ef\u4ee5\u786e\u4fdd\u6211\u4eec\u521b\u5efa\u7684\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u4f1a\u4ee5\u4e00\u4e2a\u786e\u5b9a\u7684\u72b6\u6001\u5f00\u59cb\u5176\u751f\u547d\u5468\u671f\uff0c\u4ece\u800c\u53ef\u4ee5\u51cf\u5c11\u9519\u8bef\u5e76\u7b80\u5316\u5bf9\u8c61\u7684\u4f7f\u7528\u3002<\/p>\n<\/p>\n<hr>\n<p><h3>\u4e00\u3001 <code>__init__<\/code> \u65b9\u6cd5\u7684\u5b9a\u4e49\u548c\u4f5c\u7528<\/h3>\n<\/p>\n<p><p><code>__init__<\/code> \u662f\u4e00\u4e2a\u57fa\u672c\u7684\u6784\u9020\u5668\uff08Constructor\uff09\u65b9\u6cd5\uff0c\u5728Python\u7c7b\u4e2d\u7528\u4e8e\u521d\u59cb\u5316\u65b0\u521b\u5efa\u7684\u5bf9\u8c61\u3002\u5f53\u4e00\u4e2a\u7c7b\u88ab\u5b9e\u4f8b\u5316\uff08\u5373\u4e00\u4e2a\u5bf9\u8c61\u88ab\u521b\u5efa\uff09\u65f6\uff0c<code>__init__<\/code> \u65b9\u6cd5\u4f1a\u88ab\u81ea\u52a8\u8c03\u7528\u3002\u8fd9\u4e2a\u65b9\u6cd5\u53ef\u4ee5\u63a5\u53d7\u53c2\u6570\uff0c\u901a\u5e38\u7528\u4e8e\u7ed9\u5bf9\u8c61\u8d4b\u4e88\u521d\u503c\u6216\u8005\u6267\u884c\u521d\u59cb\u5316\u65f6\u5fc5\u8981\u7684\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><p><strong><code>__init__<\/code> \u65b9\u6cd5\u8ba9\u5bf9\u8c61\u521d\u59cb\u5316\u53d8\u5f97\u5bb9\u6613\u548c\u76f4\u63a5<\/strong>\u3002\u53ea\u8981\u5b9a\u4e49\u4e86 <code>__init__<\/code> \u65b9\u6cd5\uff0c\u5c31\u53ef\u4ee5\u5728\u521b\u5efa\u5b9e\u4f8b\u7684\u65f6\u5019\u4f20\u5165\u53c2\u6570\uff0c\u7136\u540e\u5728\u65b9\u6cd5\u5185\u90e8\u5bf9\u8fd9\u4e9b\u53c2\u6570\u8fdb\u884c\u64cd\u4f5c\uff0c\u5982\u8bbe\u7f6e\u5bf9\u8c61\u5c5e\u6027\u3002\u8fd9\u6837\u7684\u8bbe\u8ba1\u6a21\u5f0f\u80fd\u591f\u8ba9\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u5c5e\u6027\u7684\u8bbe\u7f6e\u540c\u65f6\u5b8c\u6210\uff0c\u7b80\u5316\u4e86\u4ee3\u7801\u7684\u590d\u6742\u6027\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001 \u4f7f\u7528 <code>__init__<\/code> \u521b\u5efa\u6709\u610f\u4e49\u7684\u5b9e\u4f8b<\/h3>\n<\/p>\n<p><p><code>__init__<\/code> \u65b9\u6cd5\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u5c5e\u6027\u3002\u4e0d\u540c\u7684\u5bf9\u8c61\u53ef\u80fd\u62e5\u6709\u4e0d\u540c\u7684\u5c5e\u6027\u96c6\uff0c\u4f8b\u5982\uff0c\u4e00\u4e2a<code>Person<\/code>\u7c7b\u7684\u5bf9\u8c61\u53ef\u80fd\u9700\u8981\u521d\u59cb\u5316\u59d3\u540d\uff08name\uff09\u3001\u5e74\u9f84\uff08age\uff09\u7b49\u4fe1\u606f\uff0c\u800c\u4e00\u4e2a<code>Car<\/code>\u7c7b\u7684\u5bf9\u8c61\u53ef\u80fd\u9700\u8981\u521d\u59cb\u5316\u54c1\u724c\uff08brand\uff09\u3001\u578b\u53f7\uff08model\uff09\u7b49\u4fe1\u606f\u3002<\/p>\n<\/p>\n<p><p><strong>\u901a\u8fc7\u5728 <code>__init__<\/code> \u65b9\u6cd5\u4e2d\u8bbe\u7f6e\u5c5e\u6027\uff0c\u6211\u4eec\u786e\u4fdd\u4e86\u5bf9\u8c61\u4e00\u521b\u5efa\u5c31\u62e5\u6709\u4e86\u6709\u610f\u4e49\u7684\u72b6\u6001<\/strong>\u3002\u8fd9\u79cd\u65b9\u5f0f\u4f7f\u5f97\u5bf9\u8c61\u80fd\u591f\u5373\u523b\u4f7f\u7528\uff0c\u7528\u6237\u65e0\u9700\u5173\u5fc3\u5bf9\u8c61\u5185\u90e8\u5982\u4f55\u521d\u59cb\u5316\uff0c\u5927\u5927\u63d0\u5347\u4e86\u5bf9\u8c61\u7684\u6613\u7528\u6027\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001 <code>__init__<\/code> \u65b9\u6cd5\u7684\u53c2\u6570\u548c <code>self<\/code><\/h3>\n<\/p>\n<p><p>\u5728 <code>__init__<\/code> \u65b9\u6cd5\u7684\u5b9a\u4e49\u4e2d\uff0c<code>self<\/code> \u53c2\u6570\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\uff0c\u5b83\u4ee3\u8868\u7740\u7c7b\u7684\u5b9e\u4f8b\u3002<code>self<\/code> \u4e0d\u5fc5\u7531\u7a0b\u5e8f\u5458\u663e\u793a\u4f20\u9012\uff0cPython\u89e3\u91ca\u5668\u4f1a\u81ea\u52a8\u5904\u7406\u3002\u7d27\u968f <code>self<\/code> \u540e\u9762\u7684\u53c2\u6570\u5219\u662f\u521d\u59cb\u5316\u8fc7\u7a0b\u4e2d\u9700\u8981\u7528\u5230\u7684\u53c2\u6570\uff0c\u7a0b\u5e8f\u5458\u4f1a\u5728\u521b\u5efa\u7c7b\u5b9e\u4f8b\u65f6\u4f20\u9012\u8fd9\u4e9b\u53c2\u6570\u3002<\/p>\n<\/p>\n<p><p><strong>\u901a\u8fc7\u4f7f\u7528 <code>self<\/code> \u53c2\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u8bbf\u95ee\u548c\u8bbe\u7f6e\u5bf9\u8c61\u7684\u5c5e\u6027<\/strong>\u3002<code>self<\/code> \u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u5f0f\u6765\u8868\u793a\u548c\u64cd\u4f5c\u5bf9\u8c61\u7684\u5f53\u524d\u72b6\u6001\uff0c\u5b83\u4f7f\u5f97\u65b9\u6cd5\u80fd\u591f\u52a8\u6001\u5730\u4e0e\u5bf9\u8c61\u7684\u5b9e\u4f8b\u76f8\u5173\u8054\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001 <code>__init__<\/code> \u4e2d\u7684\u9ed8\u8ba4\u53c2\u6570\u548c\u53ef\u53d8\u53c2\u6570<\/h3>\n<\/p>\n<p><p><code>__init__<\/code> \u65b9\u6cd5\u4e5f\u652f\u6301\u9ed8\u8ba4\u53c2\u6570\u548c\u53ef\u53d8\u53c2\u6570\u3002\u8fd9\u610f\u5473\u7740\u6211\u4eec\u53ef\u4ee5\u5728\u4e0d\u63d0\u4f9b\u6240\u6709\u53c2\u6570\u7684\u60c5\u51b5\u4e0b\u521b\u5efa\u5bf9\u8c61\uff0c\u6216\u8005\u63a5\u53d7\u4e00\u4e2a\u53ef\u53d8\u6570\u91cf\u7684\u53c2\u6570\u3002\u9ed8\u8ba4\u53c2\u6570\u53ef\u4ee5\u7b80\u5316\u5bf9\u8c61\u7684\u5b9e\u4f8b\u5316\u8fc7\u7a0b\uff0c\u800c\u53ef\u53d8\u53c2\u6570\u5219\u4e3a\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u63d0\u4f9b\u4e86\u989d\u5916\u7684\u7075\u6d3b\u6027\u3002<\/p>\n<\/p>\n<p><p><strong>\u8bbe\u7f6e\u9ed8\u8ba4\u53c2\u6570\u53ef\u4ee5\u8ba9\u7c7b\u7684\u5b9e\u4f8b\u5316\u66f4\u52a0\u7684\u7075\u6d3b\u548c\u65b9\u4fbf\uff0c\u800c\u53ef\u53d8\u53c2\u6570\u5219\u53ef\u4ee5\u5e94\u5bf9\u90a3\u4e9b\u53c2\u6570\u6570\u91cf\u4e0d\u56fa\u5b9a\u7684\u60c5\u51b5<\/strong>\u3002\u8fd9\u4e9b\u9ad8\u7ea7\u529f\u80fd\u80fd\u591f\u8ba9 <code>__init__<\/code> \u65b9\u6cd5\u7684\u5b9a\u4e49\u8986\u76d6\u66f4\u591a\u7684\u4f7f\u7528\u60c5\u5883\u3002<\/p>\n<\/p>\n<p><h3>\u4e94\u3001 <code>__init__<\/code> \u4e0e\u5bf9\u8c61\u7684\u7ee7\u627f<\/h3>\n<\/p>\n<p><p>\u5728Python\u4e2d\uff0c\u7c7b\u53ef\u4ee5\u7ee7\u627f\u53e6\u4e00\u4e2a\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u5982\u679c\u4e00\u4e2a\u7c7b\u7ee7\u627f\u81ea\u53e6\u4e00\u4e2a\u7c7b\uff0c\u5e76\u4e14\u4e24\u8005\u90fd\u5b9a\u4e49\u4e86 <code>__init__<\/code> \u65b9\u6cd5\uff0c\u5b50\u7c7b\u53ef\u4ee5\u901a\u8fc7 <code>super()<\/code> \u51fd\u6570\u8c03\u7528\u7236\u7c7b\u7684 <code>__init__<\/code> \u65b9\u6cd5\u6765\u786e\u4fdd\u7236\u7c7b\u7684\u5c5e\u6027\u88ab\u6070\u5f53\u5730\u521d\u59cb\u5316\u3002<\/p>\n<\/p>\n<p><p><strong>\u7ee7\u627f\u673a\u5236\u8981\u6c42\u5728\u5b50\u7c7b\u7684 <code>__init__<\/code> \u65b9\u6cd5\u4e2d\u6070\u5f53\u4f7f\u7528supercall\u6765\u4fdd\u8bc1\u6574\u4e2a\u7ee7\u627f\u4f53\u7cfb\u7684\u521d\u59cb\u5316\u903b\u8f91\u6b63\u786e\u65e0\u8bef<\/strong>\u3002\u9002\u5f53\u5730\u4f7f\u7528\u7ee7\u627f\u53ef\u4ee5\u91cd\u7528\u4ee3\u7801\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n<\/p>\n<p><h3>\u516d\u3001 <code>__init__<\/code> \u4e0e\u7c7b\u7684\u5c01\u88c5\u6027<\/h3>\n<\/p>\n<p><p><strong><code>__init__<\/code> \u65b9\u6cd5\u662f\u7c7b\u5c01\u88c5\u7684\u91cd\u8981\u5b9e\u8df5<\/strong>\uff0c\u5b83\u5c06\u5bf9\u8c61\u7684\u6570\u636e\u548c\u65b9\u6cd5\u5305\u88c5\u5728\u7c7b\u7684\u5185\u90e8\u3002\u901a\u8fc7\u5728 <code>__init__<\/code> \u65b9\u6cd5\u4e2d\u8bbe\u7f6e\u79c1\u6709\u53d8\u91cf\uff0c\u6211\u4eec\u53ef\u4ee5\u9690\u85cf\u7c7b\u7684\u5185\u90e8\u7ec6\u8282\uff0c\u4ec5\u5bf9\u5916\u66b4\u9732\u5fc5\u8981\u7684\u63a5\u53e3\u3002<\/p>\n<\/p>\n<p><p>\u5c01\u88c5\u6027\u4e0d\u4ec5\u4fdd\u62a4\u4e86\u5bf9\u8c61\u7684\u6570\u636e\u4e0d\u88ab\u5916\u90e8\u968f\u610f\u8bbf\u95ee\uff0c\u800c\u4e14\u4e5f\u662f\u826f\u597d\u7684\u62bd\u8c61\u5b9e\u8df5\uff0c\u53ef\u4ee5\u4f7f\u5916\u90e8\u4ee3\u7801\u4e0d\u4f9d\u8d56\u4e8e\u5185\u90e8\u5b9e\u73b0\u7684\u7ec6\u8282\uff0c\u51cf\u5c11\u8026\u5408\u3002<\/p>\n<\/p>\n<p><h3>\u4e03\u3001 <code>__init__<\/code> \u4f7f\u7528\u7684\u6700\u4f73\u5b9e\u8df5<\/h3>\n<\/p>\n<p><p>\u4e3a\u4e86\u7f16\u5199\u51fa\u66f4\u52a0\u53ef\u8bfb\u548c\u7ef4\u62a4\u7684 <code>__init__<\/code> \u65b9\u6cd5\uff0c\u6709\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5\u5efa\u8bae\u9075\u5faa\u3002\u8fd9\u5176\u4e2d\u5305\u62ec\u5728 <code>__init__<\/code> 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\u662f\u9762\u5411\u5bf9\u8c61\u7a0b\u5e8f\u8bbe\u8ba1\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u7684\u5408\u7406\u5229\u7528\u5bf9\u4e8e\u7f16\u5199\u51fa\u9ad8\u6548\u3001\u7b80\u6d01\u3001\u5bb9\u6613\u7ef4\u62a4\u7684Python\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. 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