{"id":599,"date":"2024-01-02T14:14:32","date_gmt":"2024-01-08T13:15:48","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/python%e4%b8%ad%e7%9a%84%e6%9c%89%e5%ba%8f%e5%ad%97%e5%85%b8ordereddict\/"},"modified":"2025-08-02T21:54:54","modified_gmt":"2025-08-02T13:54:54","slug":"python%e4%b8%ad%e7%9a%84%e6%9c%89%e5%ba%8f%e5%ad%97%e5%85%b8ordereddict","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/python%e4%b8%ad%e7%9a%84%e6%9c%89%e5%ba%8f%e5%ad%97%e5%85%b8ordereddict\/","title":{"rendered":"Python\u6709\u5e8f\u5b57\u5178(OrderedDict)\u5b8c\u5168\u6307\u5357\uff1a\u7528\u6cd5\u3001\u5b9e\u4f8b\u4e0e\u6027\u80fd\u5206\u6790"},"content":{"rendered":"<p>Python\u7684OrderedDict\u662f\u4e00\u4e2a\u5b57\u5178\u5b50\u7c7b\uff0c\u5b83\u4f1a\u4fdd\u6301\u9879\u76ee\u63d2\u5165\u7684\u987a\u5e8f\u3002\u5f53\u6211\u4eec\u904d\u5386OrderedDict\u65f6\uff0c\u9879\u76ee\u4f1a\u6309\u7167\u5b83\u4eec\u88ab\u63d2\u5165\u7684\u987a\u5e8f\u8fd4\u56de\u3002\u666e\u901a\u5b57\u5178\u4e0d\u4f1a\u8ffd\u8e2a\u63d2\u5165\u987a\u5e8f\u3002\u56e0\u6b64\uff0c\u5728\u5bf9\u5176\u8fdb\u884c\u8fed\u4ee3\u65f6\uff0c\u9879\u76ee\u4f1a\u6309\u7167\u4efb\u610f\u7684\u987a\u5e8f\u8fd4\u56de\u3002\u5f53\u6211\u4eec\u60f3\u8981\u786e\u4fdd\u9879\u76ee\u6309\u7167\u63d2\u5165\u7684\u987a\u5e8f\u8fd4\u56de\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528OrderedDict\u3002<\/p>\n<h2>Python\u6709\u5e8f\u5b57\u5178<\/h2>\n<ul class=\"post-ul\">\n<li>OrderedDict\u662fPython collections\u6a21\u5757\u7684\u4e00\u90e8\u5206\u3002<\/li>\n<li>\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u7a7a\u7684OrderedDict\u5e76\u5411\u5176\u4e2d\u6dfb\u52a0\u9879\u76ee\u3002\u5982\u679c\u6211\u4eec\u901a\u8fc7\u4f20\u9012\u4e00\u4e2adict\u53c2\u6570\u6765\u521b\u5efaOrderedDict\uff0c\u90a3\u4e48\u987a\u5e8f\u53ef\u80fd\u4f1a\u4e22\u5931\uff0c\u56e0\u4e3adict\u4e0d\u7ef4\u62a4\u63d2\u5165\u987a\u5e8f\u3002<\/li>\n<li>\u5982\u679cOrderedDict\u4e2d\u7684\u9879\u76ee\u88ab\u8986\u76d6\uff0c\u5b83\u7684\u4f4d\u7f6e\u5c06\u88ab\u4fdd\u6301\u3002<\/li>\n<li>\u5982\u679c\u4e00\u4e2a\u9879\u76ee\u88ab\u5220\u9664\u5e76\u518d\u6b21\u6dfb\u52a0\uff0c\u90a3\u4e48\u5b83\u5c06\u79fb\u52a8\u5230\u6700\u540e\u3002<\/li>\n<li>OrderedDict\u7684popitem\u65b9\u6cd5\u6309\u7167FIFO\uff08\u5148\u8fdb\u5148\u51fa\uff09\u987a\u5e8f\u79fb\u9664\u9879\u76ee\u3002\u5b83\u63a5\u53d7\u4e00\u4e2a\u5e03\u5c14\u53c2\u6570last\uff0c\u5982\u679c\u8bbe\u7f6e\u4e3aTrue\uff0c\u5219\u9879\u76ee\u6309\u7167LIFO\uff08\u540e\u8fdb\u5148\u51fa\uff09\u987a\u5e8f\u8fd4\u56de\u3002<\/li>\n<li>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528move_to_end\u51fd\u6570\u5c06\u9879\u76ee\u79fb\u52a8\u5230OrderedDict\u7684\u5f00\u5934\u6216\u7ed3\u5c3e\u3002\u5b83\u63a5\u53d7\u4e00\u4e2a\u5e03\u5c14\u53c2\u6570last\uff0c\u5982\u679c\u8bbe\u7f6e\u4e3aFalse\uff0c\u5219\u9879\u76ee\u88ab\u79fb\u52a8\u5230\u6709\u5e8f\u5b57\u5178\u7684\u5f00\u5934\u3002<\/li>\n<li>\u4ecePython 3.6\u5f00\u59cb\uff0c\u4f20\u9012\u7ed9OrderedDict\u6784\u9020\u51fd\u6570\u7684\u5173\u952e\u5b57\u53c2\u6570\u7684\u987a\u5e8f\u4f1a\u88ab\u4fdd\u7559\uff0c\u53c2\u8003PEP-468\u3002<\/li>\n<li>\u6211\u4eec\u53ef\u4ee5\u5c06reversed()\u51fd\u6570\u4e0eOrderedDict\u4e00\u8d77\u4f7f\u7528\uff0c\u4ee5\u76f8\u53cd\u7684\u987a\u5e8f\u8fed\u4ee3\u5143\u7d20\u3002<\/li>\n<li>OrderedDict\u5bf9\u8c61\u4e4b\u95f4\u7684\u76f8\u7b49\u6027\u6d4b\u8bd5\u662f\u987a\u5e8f\u654f\u611f\u7684\uff0c\u5e76\u5b9e\u73b0\u4e3alist(od1.items())==list(od2.items())\u3002<\/li>\n<li>OrderedDict\u4e0e\u5176\u4ed6Mapping\u5bf9\u8c61\u4e4b\u95f4\u7684\u76f8\u7b49\u6027\u6d4b\u8bd5\u662f\u987a\u5e8f\u4e0d\u654f\u611f\u7684\uff0c\u5c31\u50cf\u5e38\u89c4\u5b57\u5178\u4e00\u6837\u3002\u8fd9\u5141\u8bb8OrderedDict\u5bf9\u8c61\u5728\u4efb\u4f55\u4f7f\u7528\u5e38\u89c4\u5b57\u5178\u7684\u5730\u65b9\u88ab\u66ff\u4ee3\u3002<\/li>\n<\/ul>\n<h2>Python\u6709\u5e8f\u5b57\u5178\u793a\u4f8b<\/h2>\n<p>\u8ba9\u6211\u4eec\u770b\u4e00\u4e9bPython OrderedDict\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<h3>\u521b\u5efa\u6709\u5e8f\u5b57\u5178\u5bf9\u8c61<\/h3>\n<pre class=\"post-pre\"><code>from collections import OrderedDict\r\n\r\n# \u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u5b57\u5178\r\nmy_dict = {'kiwi': 4, 'apple': 5, 'cat': 3}\r\n\r\n# \u521b\u5efa\u7a7a\u6709\u5e8f\u5b57\u5178\r\nordered_dict = OrderedDict()\r\nprint(ordered_dict)\r\n\r\n# \u4ece\u5b57\u5178\u521b\u5efa\u6709\u5e8f\u5b57\u5178\r\nordered_dict = OrderedDict(my_dict)\r\nprint(ordered_dict)<\/code><\/pre>\n<p>\u7ed3\u679c\uff1a<\/p>\n<pre class=\"post-pre\"><code>OrderedDict()\r\nOrderedDict([('kiwi', 4), ('apple', 5), ('cat', 3)])<\/code><\/pre>\n<h3>\u5728\u6709\u5e8f\u5b57\u5178(OrderedDict)\u4e2d\u6dfb\u52a0\u3001\u66ff\u6362\u3001\u79fb\u9664\u9879\u76ee\u3002<\/h3>\n<pre class=\"post-pre\"><code># \u5411\u5b57\u5178\u6dfb\u52a0\u5143\u7d20\r\nordered_dict['dog'] = 3\r\n\r\n# \u66ff\u6362\u5b57\u5178\u952e\u503c\r\nordered_dict['kiwi'] = 10\r\nprint(ordered_dict)\r\n\r\n# \u5220\u9664\u5e76\u6dfb\u52a0\u4e00\u4e2a\u503c\r\nordered_dict.pop('kiwi')\r\nprint(ordered_dict)\r\nordered_dict['kiwi'] = 4\r\nprint(ordered_dict)<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>OrderedDict([('kiwi', 10), ('apple', 5), ('cat', 3), ('dog', 3)])\r\nOrderedDict([('apple', 5), ('cat', 3), ('dog', 3)])\r\nOrderedDict([('apple', 5), ('cat', 3), ('dog', 3), ('kiwi', 4)])<\/code><\/pre>\n<h3>\u6709\u5e8f\u5b57\u5178 move_to_end \u793a\u4f8b<\/h3>\n<pre class=\"post-pre\"><code># \u5c06apple\u79fb\u52a8\u5230\u672b\u5c3e\uff0c\u5c06dog\u79fb\u52a8\u5230\u5f00\u5934\r\nordered_dict.move_to_end('apple')\r\nordered_dict.move_to_end('dog', False)\r\nprint(ordered_dict)<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>OrderedDict([('dog', 3), ('cat', 3), ('kiwi', 4), ('apple', 5)])<\/code><\/pre>\n<h3>\u6709\u5e8f\u5b57\u5178popitem\u793a\u4f8b<\/h3>\n<pre class=\"post-pre\"><code># \u5f39\u51fa\u6700\u540e\u4e00\u9879\r\nitem = ordered_dict.popitem(True)\r\nprint(item)\r\nprint(ordered_dict)<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>('apple', 5)\r\nOrderedDict([('dog', 3), ('cat', 3), ('kiwi', 4)])<\/code><\/pre>\n<h3>\u6709\u5e8f\u5b57\u5178\u7684\u9006\u5411\u8fed\u4ee3<\/h3>\n<pre class=\"post-pre\"><code># \u9006\u5411\u8fed\u4ee3\r\nfor item in reversed(ordered_dict):\r\n    print(item)<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>kiwi\r\ncat\r\ndog<\/code><\/pre>\n<h3>\u6709\u5e8f\u5b57\u5178\u7684\u76f8\u7b49\u6027\u6d4b\u8bd5\u793a\u4f8b<\/h3>\n<pre class=\"post-pre\"><code># \u76f8\u7b49\u6027\u6d4b\u8bd5\r\nd1 = {'a': 'A', 'b': 'B'}\r\nd2 = {'b': 'B', 'a': 'A'}\r\n\r\nod1 = OrderedDict({'a': 'A', 'b': 'B'})\r\nod2 = OrderedDict({'b': 'B', 'a': 'A'})\r\n\r\nprint(d1 == d2)\r\nprint(od1 == od2)\r\nprint(d1 == od1)<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>True\r\nFalse\r\nTrue<\/code><\/pre>\n<p>\u4f60\u53ef\u4ee5\u4ece\u6211\u4eec\u7684GitHub\u4ee3\u7801\u5e93\u4e2d\u4e0b\u8f7d\u5b8c\u6574\u7684\u793a\u4f8b\u4ee3\u7801\u3002<\/p>\n<p>\u53c2\u8003\u8d44\u6599\uff1aPython\u6587\u6863<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Python\u7684OrderedDict\u662f\u4e00\u4e2a\u5b57\u5178\u5b50\u7c7b\uff0c\u5b83\u4f1a\u4fdd\u6301\u9879\u76ee\u63d2\u5165\u7684\u987a\u5e8f\u3002\u5f53\u6211\u4eec\u904d\u5386OrderedDict\u65f6 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1716,279,280,283,1717],"class_list":["post-599","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-ordereddict","tag-python"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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