{"id":204664,"date":"2025-05-29T09:09:19","date_gmt":"2025-05-29T01:09:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204664\/"},"modified":"2025-05-29T09:09:19","modified_gmt":"2025-05-29T01:09:19","slug":"python-%e5%ad%97%e5%85%b8%e7%9a%84key%e5%8f%af%e4%bb%a5%e6%98%af%e5%8c%85%e5%90%ab%e5%88%97%e8%a1%a8%e7%9a%84%e5%85%83%e7%bb%84%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204664\/","title":{"rendered":"Python \u5b57\u5178\u7684Key\u53ef\u4ee5\u662f\u5305\u542b\u5217\u8868\u7684\u5143\u7ec4\u5417\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Python \u5b57\u5178\u7684Key\u53ef\u4ee5\u662f\u5305\u542b\u5217\u8868\u7684\u5143\u7ec4\u5417\uff1f<\/h1>\n

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<\/p>\n

python\u57fa\u7840\u95ee\u9898\uff1a\u5b57\u5178\u7684key\u53ef\u4ee5\u662f\u5143\u7ec4([1, 2],)\u8fd9\u79cd\u7c7b\u578b\u5417\uff1f<\/strong><\/p>\n

\u5728python\u4e2d\uff0c\u5b57\u5178\u7684key\u5fc5\u987b\u662f\u53ef\u54c8\u5e0c\u5bf9\u8c61\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u5fc5\u987b\u5177\u6709\u4e0d\u53d8\u7684\u54c8\u5e0c\u503c\uff0c\u5e76\u4e14\u53ef\u4ee5\u88ab\u6bd4\u8f83\u4ee5\u786e\u5b9a\u76f8\u7b49\u6027\u3002\u5e38\u89c1\u7684\u53ef\u54c8\u5e0c\u7c7b\u578b\u5305\u62ec\u5b57\u7b26\u4e32\u3001\u6574\u578b\u3001\u6d6e\u70b9\u578b\u3001\u5e03\u5c14\u3001\u5143\u7ec4\u548cnone\u3002\u7136\u800c\uff0c\u5217\u8868\u7b49\u4e0d\u53ef\u54c8\u5e0c\u5bf9\u8c61\u4e0d\u80fd\u7528\u4f5ckey\u3002<\/p>\n

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\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3\uff0c\u8ba9\u6211\u4eec\u6765\u770b\u770b\u5143\u7ec4\u7684__hash__()\u51fd\u6570\u7684\u5b9e\u73b0\uff1a<\/p>\n

static Py_hash_t\ntuplehash(PyTupleObject *v)\n{\n    Py_ssize_t i, len = Py_SIZE(v);\n    PyObject **item = v->ob_item;\n\n    Py_uhash_t acc = _PyHASH_XXPRIME_5;\n    for (i = 0; i < len; i++) {\n        Py_uhash_t lane = PyObject_Hash(item[i]);\n        if (lane == (Py_uhash_t)-1) {\n            return -1;\n        }\n        acc += lane * _PyHASH_XXPRIME_2;\n        acc = _PyHASH_XXROTATE(acc);\n        acc *= _PyHASH_XXPRIME_1;\n    }\n\n    \/* Add input length, mangled to keep the historical value of hash(()). *\/\n    acc += len ^ (_PyHASH_XXPRIME_5 ^ 3527539UL);\n\n    if (acc == (Py_uhash_t)-1) {\n        return 1546275796;\n    }\n    return acc;\n}<\/pre>\n
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Python \u5b57\u5178\u7684Key\u53ef\u4ee5\u662f...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-204664","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204664","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=204664"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204664\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}