\n__name__\u662f\u9b54\u6cd5\u51fd\u6570\u7684\u4e00\u79cd\uff0c\u5982\u679c\u5927\u5bb6\u60f3\u8be6\u7ec6\u4e86\u89e3\u548c\u9b54\u6cd5\u51fd\u6570\u76f8\u5173\u7684\u77e5\u8bc6\u70b9\u51fb\u8fd9\u91cc<\/a>\uff0c\u91cc\u9762\u6574\u7406\u4e86Python\u4e2d\u5e38\u89c1\u7684\u9b54\u6cd5\u51fd\u6570\u7528\u6cd5\uff0c\u90fd\u6709\u8be6\u7ec6\u7684\u4ee3\u7801\u89e3\u6790\uff1a<\/p>\n<\/blockquote>\n\n\n\n
\u521d\u8bc6CV\uff1aPython\uff1a\u5b9e\u4f8b\u8bb2\u89e3Python\u4e2d\u7684\u9b54\u6cd5\u51fd\u6570\uff08\u9ad8\u7ea7\u8bed\u6cd5\uff09998 \u8d5e\u540c \u00b7 54 \u8bc4\u8bba\u6587\u7ae0<\/a><\/p>\n\n\n\n
\u5f15\u8a00<\/h2>\n\n\n\n
\u5b66\u8fc7Java\u3001C\u3001C++\u7684\u7a0b\u5e8f\u5458\u5e94\u8be5\u90fd\u77e5\u9053\uff0c\u6bcf\u6b21\u5f00\u542f\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u90fd\u5fc5\u987b\u5199\u4e00\u4e2a\u4e3b\u51fd\u6570\u4f5c\u4e3a\u7a0b\u5e8f\u7684\u5165\u53e3\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684main\u51fd\u6570\u3002\u5982\u4e0b\u6240\u793a\uff0c main()\u5c31\u662fJava\u4e2d\u7684\u4e00\u4e2amain\u51fd\u6570\u3002<\/strong><\/p>\n\n\n\n
public class HelloWorld {\n\n public static void main(String[] args) {\n\n System.out.println(\"HelloWorld\");\n\n }\n\n}<\/pre>\n\n\n\n\u4e0eJava\u3001C\u3001C++\u7b49\u51e0\u79cd\u8bed\u8a00\u4e0d\u540c\u7684\u662f\uff0cPython\u662f\u4e00\u79cd\u89e3\u91ca\u578b\u811a\u672c\u8bed\u8a00<\/strong>\uff0c\u5728\u6267\u884c\u4e4b\u524d\u4e0d\u540c\u8981\u5c06\u6240\u6709\u4ee3\u7801\u5148\u7f16\u8bd1\u6210\u4e2d\u95f4\u4ee3\u7801<\/a>\uff0cPython\u7a0b\u5e8f\u8fd0\u884c\u65f6\u662f\u4ece\u6a21\u5757\u9876\u884c\u5f00\u59cb\uff0c\u9010\u884c\u8fdb\u884c\u7ffb\u8bd1\u6267\u884c\uff0c\u6240\u4ee5\uff0c\u6700\u9876\u5c42\uff08\u6ca1\u6709\u88ab\u7f29\u8fdb\uff09\u7684\u4ee3\u7801\u90fd\u4f1a\u88ab\u6267\u884c\uff0c\u6240\u4ee5Python\u4e2d\u5e76\u4e0d\u9700\u8981\u4e00\u4e2a\u7edf\u4e00\u7684main()\u4f5c\u4e3a\u7a0b\u5e8f\u7684\u5165\u53e3\u3002\u5728\u67d0\u79cd\u610f\u4e49\u4e0a\u8bb2\uff0c\u201cif __name__==\u2019__main__:\u201d\u4e5f\u50cf\u662f\u4e00\u4e2a\u6807\u5fd7\uff0c\u8c61\u5f81\u7740Java\u7b49\u8bed\u8a00\u4e2d\u7684\u7a0b\u5e8f\u4e3b\u5165\u53e3\uff0c\u544a\u8bc9\u5176\u4ed6\u7a0b\u5e8f\u5458\uff0c\u4ee3\u7801\u5165\u53e3\u5728\u6b64\u2014\u2014\u8fd9\u662f\u201cif __name__==\u2019__main__:\u201d\u8fd9\u6761\u4ee3\u7801\u7684\u610f\u4e49\u4e4b\u4e00\u3002<\/p>\n\n\n\n
1. __name__\u7684\u7406\u89e3<\/h3>\n\n\n\n
1.1 \u4e3a\u4ec0\u4e48\u4f7f\u7528__name__\u5c5e\u6027\uff1f<\/p>\n\n\n\n
Python\u89e3\u91ca\u5668\u5728\u5bfc\u5165\u6a21\u5757\u65f6\uff0c\u4f1a\u5c06\u6a21\u5757\u4e2d\u6ca1\u6709\u7f29\u8fdb\u7684\u4ee3\u7801\u5168\u90e8\u6267\u884c\u4e00\u904d\uff08\u6a21\u5757\u5c31\u662f\u4e00\u4e2a\u72ec\u7acb\u7684Python\u6587\u4ef6\uff09\u3002\u5f00\u53d1\u4eba\u5458\u901a\u5e38\u4f1a\u5728\u6a21\u5757\u4e0b\u65b9\u589e\u52a0\u4e00\u4e9b\u6d4b\u8bd5\u4ee3\u7801\uff0c\u4e3a\u4e86\u907f\u514d\u8fd9\u4e9b\u6d4b\u8bd5\u4ee3\u7801\u5728\u6a21\u5757\u88ab\u5bfc\u5165\u540e\u6267\u884c\uff0c\u53ef\u4ee5\u5229\u7528__name__\u5c5e\u6027\u3002<\/p>\n\n\n\n
1.2 __name__\u5c5e\u6027\u3002<\/p>\n\n\n\n
__name__\u5c5e\u6027\u662fPython\u7684\u4e00\u4e2a\u5185\u7f6e\u5c5e\u6027\uff0c\u8bb0\u5f55\u4e86\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n
\n
- \u82e5\u662f\u5728\u5f53\u524d\u6587\u4ef6\uff0c__name__ \u662f__main__\u3002\n
\n
- \u5728hello\u6587\u4ef6\u4e2d\u6253\u5370\u672c\u6587\u4ef6\u7684__name__\u5c5e\u6027\u503c\uff0c\u663e\u793a\u7684\u662f__main__<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
<\/figure>\n\n\n\n
\n
- \u82e5\u662f\u5bfc\u5165\u7684\u6587\u4ef6\uff0c__name__\u662f\u6a21\u5757\u540d\u3002\n
\n
- test\u6587\u4ef6\u5bfc\u5165hello\u6a21\u5757\uff0c\u5728test\u6587\u4ef6\u4e2d\u6253\u5370\u51fahello\u6a21\u5757\u7684__name__\u5c5e\u6027\u503c\uff0c\u663e\u793a\u7684\u662fhello\u6a21\u5757\u7684\u6a21\u5757\u540d\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
<\/figure>\n\n\n\n
\u56e0\u6b64__name__ == ‘__main__’ \u5c31\u8868\u793a\u5728\u5f53\u524d\u6587\u4ef6\u4e2d\uff0c\u53ef\u4ee5\u5728if __name__ == ‘__main__’:\u6761\u4ef6\u4e0b\u5199\u5165\u6d4b\u8bd5\u4ee3\u7801\uff0c\u5982\u6b64\u53ef\u4ee5\u907f\u514d\u6d4b\u8bd5\u4ee3\u7801\u5728\u6a21\u5757\u88ab\u5bfc\u5165\u540e\u6267\u884c\u3002<\/p>\n\n\n\n
2. \u6a21\u5757\u5bfc\u5165<\/h3>\n\n\n\n
\u6211\u4eec\u77e5\u9053\uff0c\u5f53\u6211\u4eec\u628a\u6a21\u5757A\u4e2d\u7684\u4ee3\u7801\u5728\u6a21\u5757B\u4e2d\u8fdb\u884cimport A\u65f6\uff0c\u53ea\u8981B\u6a21\u5757\u4ee3\u7801\u8fd0\u884c\u5230\u8be5import\u8bed\u53e5<\/a>\uff0c\u6a21\u5757A\u7684\u4ee3\u7801\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n\n\n\n
\u6a21\u5757A\uff1a<\/p>\n\n\n\n
# \u6a21\u5757A\n\na = 100\n\nprint('\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757A\u2026\u2026')\n\nprint(a)<\/pre>\n\n\n\n\u6a21\u5757B\uff1a<\/p>\n\n\n\n
# \u6a21\u5757B\n\nfrom package01 import A\n\nb = 200\n\nprint('\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757B\u2026\u2026')\n\nprint(b)<\/pre>\n\n\n\n\u8fd0\u884c\u6a21\u5757B\u65f6\uff0c\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757A\u2026\u2026\n100\n\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757B\u2026\u2026\n200<\/pre>\n\n\n\n\u5982\u679c\u5728\u6a21\u5757A\u4e2d\uff0c\u6211\u4eec\u6709\u90e8\u5206\u7684\u4ee3\u7801\u4e0d\u60f3\u5728\u88ab\u5bfc\u5165\u5230B\u65f6\u76f4\u63a5\u88ab\u8fd0\u884c\uff0c\u4f46\u5728\u76f4\u63a5\u8fd0\u884cA\u65f6\u53ef\u76f4\u63a5\u8fd0\u884c\uff0c\u90a3\u8be5\u600e\u4e48\u505a\u5462\uff1f\u90a3\u5c31\u53ef\u4ee5\u7528\u5230\u201cif __name__==\u2019__main__:\u201d\u8fd9\u884c\u4ee3\u7801\u4e86\uff0c\u6211\u4eec\u961f\u4e0a\u9762\u7528\u5230\u7684A\u6a21\u5757\u4ee3\u7801<\/a>\u8fdb\u884c\u4fee\u6539\uff1a<\/p>\n\n\n\n
A\u6a21\u5757\u4ee3\u7801\u4fee\u6539\u4e3a\uff1a<\/p>\n\n\n\n
# \u6a21\u5757A\n\na = 100\n\nprint('\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757A\u2026\u2026')\n\nif __name__=='__main__':\n\n print(a)<\/pre>\n\n\n\nB\u6a21\u5757\u4e0d\u505a\u4fee\u6539\uff0c\u76f4\u63a5\u6267\u884cB\u6a21\u5757\uff0c\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757A\u2026\u2026\n\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757B\u2026\u2026\n200<\/pre>\n\n\n\n\u770b\u5230\u4e86\u5417\uff0cA\u6a21\u5757\u4e2d\u7684a\u7684\u503c\u5c31\u6ca1\u6709\u518d\u88ab\u8f93\u51fa\u4e86\u3002\u6240\u4ee5\uff0c\u5f53\u4f60\u8981\u5bfc\u5165\u67d0\u4e2a\u6a21\u5757\uff0c\u4f46\u53c8\u4e0d\u60f3\u6539\u6a21\u5757\u7684\u90e8\u5206\u4ee3\u7801\u88ab\u76f4\u63a5\u6267\u884c\uff0c\u90a3\u5c31\u53ef\u4ee5\u8fd9\u4e00\u90e8\u5206\u4ee3\u7801\u653e\u5728\u201cif __name__==’__main__’:\u201d\u5185\u90e8\u3002<\/p>\n\n\n\n
3. \u201c__name__\u201d\u4e0e\u201c__main__\u201d<\/strong><\/h2>\n\n\n\n
\u770b\u5230\u73b0\u5728\u4e5f\u8bb8\u5fc3\u4e2d\u8fd8\u662f\u7591\u60d1\uff0c\u90a3\u4e48\u73b0\u5728\u6211\u4eec\u6765\u8bf4\u4e00\u8bf4\u201cif__name__==’__main__’:\u201d\u7684\u539f\u7406\u3002<\/p>\n\n\n\n
\u201c__name__\u201d\u662fPython\u7684\u5185\u7f6e\u53d8\u91cf\uff0c\u7528\u4e8e\u6307\u4ee3\u5f53\u524d\u6a21\u5757\u3002\u6211\u4eec\u4fee\u6539\u4e0a\u9762\u7528\u5230\u7684A\u6a21\u5757\u548cB\u6a21\u5757\uff0c\u5728\u6a21\u5757\u4e2d\u5206\u522b\u8f93\u51fa\u6a21\u5757\u7684\u540d\u79f0\uff1a<\/p>\n\n\n\n
\u6a21\u5757A\uff1a<\/p>\n\n\n\n
# \u6a21\u5757A\n\nprint('\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757A\u2026\u2026')\n\nprint('\u6a21\u5757A\u4e2d__name__\u7684\u503c\uff1a{}'.format(__name__))\n\nprint('-------------------------')<\/pre>\n\n\n\n\u6a21\u5757B\uff1a<\/p>\n\n\n\n
# \u6a21\u5757B\n\nfrom package01 import A\n\nprint('\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757B\u2026\u2026')\n\nprint('\u6a21\u5757B\u4e2d__name__\u7684\u503c\uff1a{}'.format(__name__))<\/pre>\n\n\n\n\u6267\u884cA\u6a21\u5757\u65f6\uff0c\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n\n\n\n
\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757A\u2026\u2026\n\u6a21\u5757A\u4e2d__name__\u7684\u503c\uff1a__main__\n-------------------------<\/pre>\n\n\n\n\u6267\u884cB\u6a21\u5757\u65f6\uff0c\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n\n\n\n
\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757A\u2026\u2026\n\u6a21\u5757A\u4e2d__name__\u7684\u503c\uff1apackage01.A\n-------------------------\n\u4f60\u597d\uff0c\u6211\u662f\u6a21\u5757B\u2026\u2026\n\u6a21\u5757B\u4e2d__name__\u7684\u503c\uff1a__main__<\/pre>\n\n\n\n\u53d1\u73b0\u795e\u5947\u4e4b\u5904\u4e86\u5417\uff1f\u5f53\u54ea\u4e2a\u6a21\u5757\u88ab\u76f4\u63a5\u6267\u884c\u65f6\uff0c\u8be5\u6a21\u5757\u201c__name__\u201d\u7684\u503c\u5c31\u662f\u201c__main__\u201d\uff0c\u5f53\u88ab\u5bfc\u5165\u53e6\u4e00\u6a21\u5757\u65f6\uff0c\u201c__name__\u201d\u7684\u503c\u5c31\u662f\u6a21\u5757\u7684\u771f\u5b9e\u540d\u79f0\u3002\u7528\u4e00\u4e2a\u7c7b\u6bd4\u6765\u89e3\u91ca\u4e00\u4e0b\uff1a\u8bb0\u5f97\u5c0f\u65f6\u5019\u8981\u8f6e\u6d41\u6253\u7b97\u6559\u5ba4\uff0c\u8f6e\u5230\u81ea\u5df1\u7684\u65f6\u5019\uff08\u6a21\u5757\u88ab\u76f4\u63a5\u6267\u884c\u7684\u65f6\u5019\uff09\uff0c\u6211\u4eec\u4f1a\u8bf4\u4eca\u5929\u662f\u201c\u6211\u201d\uff08__main__\uff09\u503c\u65e5\uff0c\u79f0\u547c\u5176\u4ed6\u4eba\u65f6\uff0c\u6211\u4eec\u5c31\u4f1a\u76f4\u63a5\u558a\u4ed6\u4eec\u7684\u540d\u5b57\u3002\u6240\u4ee5\uff0c\u201c__main__\u201d\u5c31\u76f8\u5f53\u4e8e\u5f53\u4e8b\u4eba\uff0c\u6216\u8005\u8bf4\u7b2c\u4e00\u4eba\u79f0\u7684\u201c\u6211\u201d\u3002<\/p>\n\n\n\n
\u6240\u4ee5\uff0c\u5f53\u8fd0\u884c\u201cif __name__==’__main__’:\u201d\u8bed\u53e5\u65f6\uff0c\u5982\u679c\u5f53\u524d\u6a21\u5757\u65f6\u88ab\u76f4\u63a5\u6267\u884c\uff0c__name__\u7684\u503c\u5c31\u662f__main__\uff0c\u6761\u4ef6\u5224\u65ad\u7684\u7ed3\u679c\u4e3aTrue\uff0c\u201cif __name__==’__main__’:\u201d\u4e0b\u9762\u7684\u4ee3\u7801\u5757\u5c31\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n\n\n\n
\u5982\u679c\u5927\u5bb6\u5bf9\u56fe\u50cf\u5206\u7c7b\u548c\u68c0\u6d4b\uff08Python\u7248\uff09\u611f\u5174\u8da3\u7684\u70b9\u51fb\u4e0b\u9762\uff1a<\/h2>\n\n\n\n
\u521d\u8bc6CV\uff1a\u76ee\u6807\u68c0\u6d4b\u6bd4\u8d5b\u4e2d\u7684tricks\uff08\u5df2\u66f4\u65b0\u66f4\u591a\u4ee3\u7801\u89e3\u6790\uff09898 \u8d5e\u540c \u00b7 169 \u8bc4\u8bba\u6587\u7ae0<\/a>\u521d\u8bc6CV\uff1a\u56fe\u50cf\u5206\u7c7b\u6bd4\u8d5btricks\uff1a\u201c\u89c2\u4e91\u8bc6\u5929\u201d\u4eba\u673a\u5bf9\u6297\u5927\u8d5b\uff1a\u673a\u5668\u56fe\u50cf\u7b97\u6cd5\u8d5b\u9053-\u5929\u6c14\u8bc6\u522b\u2014\u767e\u4e07\u5956\u91d175 \u8d5e\u540c \u00b7 57 \u8bc4\u8bba\u6587\u7ae0<\/a>\u521d\u8bc6CV\uff1a\u56fe\u50cf\u5206\u7c7b\u6bd4\u8d5btricks\uff1a\u534e\u4e3a\u4e91\u4eba\u5de5\u667a\u80fd\u5927\u8d5b\u00b7\u5783\u573e\u5206\u7c7b\u6311\u6218\u676f52 \u8d5e\u540c \u00b7 99 \u8bc4\u8bba\u6587\u7ae0<\/a><\/p>\n\n\n\n
[1]<\/a>[2]<\/a><\/sup><\/p>\n\n\n\n
\u53c2\u8003<\/h2>\n\n\n\n
\n
- ^<\/a>Python\u4e2d\u201cif __name__==’__main__’:\u201d\u7406\u89e3\u4e0e\u603b\u7ed3 https:\/\/www.cnblogs.com\/chenhuabin\/p\/10118199.html<\/a><\/li>\n\n\n\n
- ^<\/a>if __name__ == ‘__main__’: https:\/\/www.cnblogs.com\/wanao\/p\/13098783.html<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
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