{"id":663,"date":"2025-01-02T22:17:53","date_gmt":"2025-01-02T14:17:53","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=663"},"modified":"2025-01-02T22:17:53","modified_gmt":"2025-01-02T14:17:53","slug":"%e5%9c%a8-python-%e4%b8%ad%ef%bc%8c%e6%80%8e%e6%a0%b7%e6%8c%89%e5%a4%9a%e4%b8%aa%e5%b1%9e%e6%80%a7%e5%af%b9%e5%88%97%e8%a1%a8%e6%8e%92%e5%ba%8f%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/01\/02\/%e5%9c%a8-python-%e4%b8%ad%ef%bc%8c%e6%80%8e%e6%a0%b7%e6%8c%89%e5%a4%9a%e4%b8%aa%e5%b1%9e%e6%80%a7%e5%af%b9%e5%88%97%e8%a1%a8%e6%8e%92%e5%ba%8f%ef%bc%9f\/","title":{"rendered":"\u5728 Python \u4e2d\uff0c\u600e\u6837\u6309\u591a\u4e2a\u5c5e\u6027\u5bf9\u5217\u8868\u6392\u5e8f\uff1f"},"content":{"rendered":"\n
\n

\u5728 Python \u4e2d\uff0c\u6309\u591a\u4e2a\u5c5e\u6027\u5bf9\u5217\u8868\u6392\u5e8f\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684 sorted()<\/code> \u51fd\u6570\u6216\u5217\u8868\u7684 sort()<\/code> \u65b9\u6cd5\uff0c\u5e76\u7ed3\u5408 lambda<\/code> \u8868\u8fbe\u5f0f\u6216 operator<\/code> \u6a21\u5757\u4e2d\u7684 itemgetter()<\/code>\u3002<\/p>\n<\/blockquote>\n\n\n\n

\u4ee5\u4e0b\u662f\u5177\u4f53\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n

\n\n\n\n

\u65b9\u6cd5 1\uff1a\u4f7f\u7528 sorted()<\/code> \u548c lambda<\/code><\/h3>\n\n\n\n
# \u793a\u4f8b\u5217\u8868\ndata = [\n    {\"name\": \"Alice\", \"age\": 25, \"score\": 85},\n    {\"name\": \"Bob\", \"age\": 30, \"score\": 90},\n    {\"name\": \"Charlie\", \"age\": 25, \"score\": 95},\n    {\"name\": \"David\", \"age\": 30, \"score\": 85},\n]\n\n# \u6309 age \u5347\u5e8f\uff0cscore \u964d\u5e8f\u6392\u5e8f\nsorted_data = sorted(data, key=lambda x: (x['age'], -x['score']))\n\nprint(sorted_data)<\/code><\/pre>\n\n\n\n
\u8bf4\u660e<\/strong>\uff1a<\/p>\n\n\n\n
    \n
  • key<\/code> \u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u7528\u4e8e\u63d0\u53d6\u6392\u5e8f\u4f9d\u636e\u3002<\/li>\n\n\n\n
  • (x['age'], -x['score'])<\/code> \u8868\u793a\u5148\u6309 age<\/code> \u5347\u5e8f\uff0c\u518d\u6309 score<\/code> \u964d\u5e8f\u3002<\/li>\n\n\n\n
  • \u5982\u679c\u4e0d\u9700\u8981\u964d\u5e8f\uff0c\u53bb\u6389\u8d1f\u53f7\u5373\u53ef\u3002<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n
    \u65b9\u6cd5 2\uff1a\u4f7f\u7528 sort()<\/code> \u548c lambda<\/code><\/h3>\n\n\n\n
    sort()<\/code> \u662f\u76f4\u63a5\u5bf9\u5217\u8868\u8fdb\u884c\u539f\u5730\u6392\u5e8f\uff0c\u8bed\u6cd5\u7c7b\u4f3c\uff1a<\/p>\n\n\n\n
    data.sort(key=lambda x: (x['age'], -x['score']))\nprint(data)<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    \u65b9\u6cd5 3\uff1a\u4f7f\u7528 itemgetter<\/code>\uff08\u63a8\u8350\u7528\u4e8e\u5b57\u5178\u5217\u8868\uff09<\/h3>\n\n\n\n
    operator.itemgetter<\/code> \u63d0\u4f9b\u66f4\u9ad8\u6548\u7684\u5b57\u6bb5\u63d0\u53d6\u65b9\u6cd5\uff0c\u9002\u5408\u5bf9\u5b57\u5178\u5217\u8868\u6392\u5e8f\u3002<\/p>\n\n\n\n
    from operator import itemgetter\n\nsorted_data = sorted(data, key=itemgetter('age', 'score'))\nprint(sorted_data)<\/code><\/pre>\n\n\n\n
    \u6ce8\u610f<\/strong>\uff1a<\/p>\n\n\n\n
      \n
    • \u9ed8\u8ba4\u6392\u5e8f\u4e3a\u5347\u5e8f\u3002\u5982\u679c\u9700\u8981\u964d\u5e8f\uff0c\u53ef\u4ee5\u7ed3\u5408 reverse=True<\/code>\uff1a<\/li>\n<\/ul>\n\n\n\n
        sorted_data = sorted(data, key=itemgetter('age', 'score'), reverse=True)<\/code><\/pre>\n\n\n\n
        \n
      • \u5bf9\u5355\u4e2a\u5b57\u6bb5\u964d\u5e8f\u9700\u7528\u8d1f\u53f7\u5904\u7406\u6216\u5c06\u5b57\u6bb5\u5355\u72ec\u5b9a\u4e49\u6392\u5e8f\u903b\u8f91\u3002<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n
        \u65b9\u6cd5 4\uff1a\u5bf9\u81ea\u5b9a\u4e49\u5bf9\u8c61\u6392\u5e8f<\/h3>\n\n\n\n
        \u5982\u679c\u4f60\u7684\u5217\u8868\u5305\u542b\u7684\u662f\u81ea\u5b9a\u4e49\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f7f\u7528 attrgetter<\/code> \u6216 lambda<\/code>\u3002<\/p>\n\n\n\n
        from operator import attrgetter\n\n# \u793a\u4f8b\u7c7b\nclass Person:\n    def __init__(self, name, age, score):\n        self.name = name\n        self.age = age\n        self.score = score\n    def __repr__(self):\n        return f\"{self.name}({self.age}, {self.score})\"\n\npeople = [\n    Person(\"Alice\", 25, 85),\n    Person(\"Bob\", 30, 90),\n    Person(\"Charlie\", 25, 95),\n    Person(\"David\", 30, 85),\n]\n\n# \u6309 age \u5347\u5e8f\uff0cscore \u964d\u5e8f\u6392\u5e8f\nsorted_people = sorted(people, key=lambda x: (x.age, -x.score))\nprint(sorted_people)<\/code><\/pre>\n\n\n\n
        \u6216\u4f7f\u7528 attrgetter<\/code>\uff1a<\/p>\n\n\n\n
        sorted_people = sorted(people, key=attrgetter('age', 'score'))<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        \u603b\u7ed3<\/h3>\n\n\n\n
          \n
        • \u4f7f\u7528 lambda<\/code> \u662f\u6700\u7075\u6d3b\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4efb\u610f\u590d\u6742\u7684\u6392\u5e8f\u903b\u8f91\u3002<\/li>\n\n\n\n
        • itemgetter<\/code> \u548c attrgetter<\/code> \u5728\u5b57\u6bb5\u63d0\u53d6\u4e0a\u6027\u80fd\u66f4\u597d\uff0c\u63a8\u8350\u4f18\u5148\u4f7f\u7528\u3002<\/li>\n\n\n\n
        • \u5982\u679c\u9700\u8981\u7a33\u5b9a\u6392\u5e8f\uff08\u4fdd\u6301\u76f8\u7b49\u9879\u7684\u539f\u6709\u987a\u5e8f\uff09\uff0csorted()<\/code> \u9ed8\u8ba4\u662f\u7a33\u5b9a\u7684\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
          \u5728 Python \u4e2d\uff0c\u6309\u591a\u4e2a\u5c5e\u6027\u5bf9\u5217\u8868\u6392\u5e8f\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684 sorted() \u51fd\u6570\u6216\u5217\u8868\u7684 sort() \u65b9\u6cd5\uff0c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[],"class_list":["post-663","post","type-post","status-publish","format-standard","hentry","category-python"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/663","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=663"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/663\/revisions"}],"predecessor-version":[{"id":664,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/663\/revisions\/664"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}