{"id":4595,"date":"2020-04-15T09:20:16","date_gmt":"2020-04-15T09:42:11","guid":{"rendered":"https:\/\/vip.fxxkpython.com\/?p=4595"},"modified":"2020-04-15T17:42:15","modified_gmt":"2020-04-15T09:42:15","slug":"6fd6a54de2","status":"publish","type":"post","link":"https:\/\/vip.fxxkpython.com\/?p=4595","title":{"rendered":"\u4f60\u5e38\u5e38\u770b\u5230\u7684 __init__.py \u5230\u5e95\u662f\u4e2a\u5565\uff1f"},"content":{"rendered":"
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\u5f53\u4f60\u53bb\u770b\u4e00\u4e9b Python \u76f8\u5173\u7684\u9879\u76ee\u65f6\uff0c\u5e38\u5e38\u4f1a\u770b\u5230 <\/span>__init<\/span>__.py<\/span><\/span>\uff0c\u5f53\u4f60\u4f7f\u7528\u67d0\u4e9b\u7f16\u8f91\u5668\u521b\u5efa Python Package \u7684\u65f6\u5019\uff0c\u5b83\u4e5f\u4f1a\u81ea\u52a8\u7ed9\u4f60\u751f\u6210\u4e00\u4e2a __init<\/span>__.py \u6587\u4ef6<\/span>\u3002<\/section>\n

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\u6211\u4eec\u5206\u522b\u5728\u4e0d\u540c\u5305\u4e0b\u7684 __init__ \u4e2d\u5199\u4e00\u4e2a print \u8bed\u53e5\uff1a
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\"\u4f60\u5e38\u5e38\u770b\u5230\u7684<\/section>\n

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\u63a5\u7740\u6211\u4eec\u8fdb\u5165 Python \uff0c\u5206\u522b\u6765\u5bfc\u5165\u8fd9\u4e9b\u6a21\u5757\uff1a
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\u5f53\u7136\uff0c\u53ea\u662f\u5bfc\u5165\u7236\u6a21\u5757\u7684\u65f6\u5019\u53ea\u4f1a\u6267\u884c\u7236\u6a21\u5757\u4e2d\u7684 init\uff1a<\/section>\n

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\"\u4f60\u5e38\u5e38\u770b\u5230\u7684<\/section>\n

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\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f53\u6211\u4eec\u53bb import \u4e00\u4e2a Package \u7684\u65f6\u5019\uff0c\u5b83\u4f1a\u9690\u6027\u7684\u53bb\u6267\u884c __init__.py \uff0c \u800c\u5728 __init__.py \u4e2d\u5b9a\u4e49\u7684\u5bf9\u8c61\uff0c\u4f1a\u88ab\u7ed1\u5b9a\u5230\u5f53\u524d\u7684\u547d\u540d\u7a7a\u95f4\u91cc\u9762\u6765\u3002<\/section>\n

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\u8fd9\u91cc\u7684 __all__ \u76f8\u5f53\u4e8e\u5bfc\u5165 [] \u91cc\u9762\u5b9a\u4e49\u7684\u6a21\u5757\u3002
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\u5f53\u7136\uff0c\u4f60\u4e5f\u53ef\u4ee5\u5728 __init__.py \u505a\u4e00\u4e9b\u521d\u59cb\u5316\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u6570\u636e\u5e93 session \u7684\u521b\u5efa\uff1a<\/section>\n

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\u5176\u5b9e\u5728 Python3.2 \u7248\u672c\u4e4b\u524d\uff0c\u5b9a\u4e49\u7684 Package \u4e0b\u9762\u4e00\u5b9a\u8981\u6709 __init__.py \u6587\u4ef6\uff0c\u8fd9\u6837 Python \u624d\u77e5\u9053\u5b83\u662f\u4e00\u4e2a Package\uff0c\u624d\u53ef\u4ee5\u5bfb\u627e\u5230\u76f8\u5173\u6a21\u5757\u7684\u8def\u5f84\u4ece\u800c\u88ab import\u3002<\/section>\n

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\u800c\u5728 Python3.2 \u4e4b\u540e\u7684\u7248\u672c\u5c31\u4e0d\u9700\u8981\u518d\u989d\u5916\u7684\u53bb\u4e13\u95e8\u521b\u5efa\u4e00\u4e2a __init__.py \u6765\u544a\u8bc9 Python \u5b83\u662f\u4e00\u4e2a Package \u4e86\uff0c\u56e0\u4e3a\u73b0\u5728\u521b\u5efa\u7684\u5305\u53eb Namespace package\uff0c Python \u53ef\u4ee5\u81ea\u52a8\u641c\u5bfb Package \u8def\u5f84\uff0c\u54ea\u6015\u4f60\u7684\u7236\u5305\u8def\u5f84\u53d1\u751f\u4e86\u6539\u53d8\uff0c\u4f60\u5728\u4e0b\u6b21\u5bfc\u5165\u7684\u65f6\u5019\uff0c Python \u8fd8\u662f\u4f1a\u81ea\u52a8\u91cd\u65b0\u641c\u7d22\u5305\u8def\u5f84\u3002<\/section>\n

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\u6211\u4eec\u628a\u521a\u521a\u5b9a\u4e49\u7684 __init__ \u90fd\u7ed9\u5220\u6389\u8bd5\u8bd5\uff1a<\/section>\n

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\u7efc\u4e0a\uff0c__init__.py \u4f1a\u5728 import \u7684\u65f6\u5019\u88ab\u6267\u884c\uff0c\u800c\u7a7a\u7684 __init__.py \u5728 Python<\/span> \u65b0\u7248\u672c\u4e2d\u5df2\u7ecf\u4e0d\u9700\u8981\u4f60\u989d\u5916\u53bb\u5b9a\u4e49\u4e86\uff0c\u56e0\u4e3a\u5c31\u7b97\u4f60\u4e0d\u5b9a\u4e49 init\uff0c Python \u4e5f\u77e5\u9053\u4f60\u5bfc\u5165\u7684\u5305\u8def\u5f84\uff0c\u4f46\u662f\u5982\u679c\u4f60\u60f3\u8981\u505a\u4e00\u4e9b\u521d\u59cb\u5316\u64cd\u4f5c\uff0c\u6216\u8005\u50cf\u6211\u4eec\u521a\u521a\u8bf4\u7684\u9884\u5148\u5bfc\u5165\u76f8\u5173\u7684\u6a21\u5757\uff0c\u90a3\u4e48\u5b9a\u4e49 __init__.py \u8fd8\u662f\u5f88\u6709\u5fc5\u8981\u7684\u54df\u3002<\/section>\n

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