{"id":334,"date":"2024-01-10T01:37:49","date_gmt":"2023-03-03T10:35:13","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e7%86%8a%e7%8c%ab-%e5%88%a0%e9%99%a4%e9%87%8d%e5%a4%8d%e8%a1%8c-drop_duplicates-%e5%87%bd%e6%95%b0\/"},"modified":"2025-08-01T23:40:38","modified_gmt":"2025-08-01T15:40:38","slug":"%e7%86%8a%e7%8c%ab-%e5%88%a0%e9%99%a4%e9%87%8d%e5%a4%8d%e8%a1%8c-drop_duplicates-%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%86%8a%e7%8c%ab-%e5%88%a0%e9%99%a4%e9%87%8d%e5%a4%8d%e8%a1%8c-drop_duplicates-%e5%87%bd%e6%95%b0\/","title":{"rendered":"Pandas\u5220\u9664\u91cd\u590d\u884c\u5b8c\u5168\u6307\u5357\uff1adrop_duplicates()\u51fd\u6570\u8be6\u89e3\u4e0e\u5b9e\u4f8b"},"content":{"rendered":"

Pandas drop_duplicates() \u51fd\u6570\u8bed\u6cd5<\/h2>\n

Pandas\u7684drop_duplicates()\u51fd\u6570\u4eceDataFrame\u4e2d\u5220\u9664\u91cd\u590d\u7684\u884c\u3002\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

drop_duplicates(self, subset=None, keep=\"first\", inplace=False)\r\n<\/code><\/pre>\n
    \n
  • subset<\/strong>\uff1a\u7528\u4e8e\u8bc6\u522b\u91cd\u590d\u884c\u7684\u5217\u6807\u7b7e\u6216\u6807\u7b7e\u5e8f\u5217\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6240\u6709\u5217\u90fd\u7528\u4e8e\u67e5\u627e\u91cd\u590d\u884c\u3002<\/li>\n
  • keep<\/strong>\uff1a\u5141\u8bb8\u503c\u4e3a{‘first’, ‘last’, False}\uff0c\u9ed8\u8ba4\u4e3a’first’\u3002\u5982\u679c\u4e3a’first’\uff0c\u5219\u5220\u9664\u9664\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u91cd\u590d\u884c\u5916\u7684\u6240\u6709\u91cd\u590d\u884c\u3002\u5982\u679c\u4e3a’last’\uff0c\u5219\u5220\u9664\u9664\u6700\u540e\u4e00\u6b21\u51fa\u73b0\u7684\u91cd\u590d\u884c\u5916\u7684\u6240\u6709\u91cd\u590d\u884c\u3002\u5982\u679c\u4e3aFalse\uff0c\u5219\u5220\u9664\u6240\u6709\u91cd\u590d\u884c\u3002<\/li>\n
  • inplace<\/strong>\uff1a\u5982\u679c\u4e3aTrue\uff0c\u5219\u4fee\u6539\u6e90DataFrame\u5e76\u8fd4\u56deNone\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6e90DataFrame\u4fdd\u6301\u4e0d\u53d8\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684DataFrame\u5b9e\u4f8b\u3002<\/li>\n<\/ul>\n
    Pandas\u5220\u9664\u91cd\u590d\u884c\u793a\u4f8b<\/h2>\n
    \u8ba9\u6211\u4eec\u770b\u4e00\u4e9b\u4eceDataFrame\u5bf9\u8c61\u4e2d\u5220\u9664\u91cd\u590d\u884c\u7684\u4f8b\u5b50\u3002<\/p>\n
    \u4fdd\u7559\u7b2c\u4e00\u4e2a\uff0c\u5220\u9664\u91cd\u590d\u7684\u884c<\/h3>\n
    \u5f53\u6ca1\u6709\u4f20\u9012\u4efb\u4f55\u53c2\u6570\u65f6\uff0c\u8fd9\u662f\u9ed8\u8ba4\u884c\u4e3a\u3002<\/p>\n
    import pandas as pd\r\n\r\nd1 = {'A': [1, 1, 1, 2], 'B': [2, 2, 2, 3], 'C': [3, 3, 4, 5]}\r\n\r\nsource_df = pd.DataFrame(d1)\r\nprint('\u6e90DataFrame:\\n', source_df)\r\n\r\n# \u4fdd\u7559\u7b2c\u4e00\u4e2a\u91cd\u590d\u884c\r\nresult_df = source_df.drop_duplicates()\r\nprint('\u7ed3\u679cDataFrame:\\n', result_df)\r\n<\/code><\/pre>\n
    \u8f93\u51fa\uff1a<\/p>\n
    \u6e90DataFrame:\r\n    A  B  C\r\n0  1  2  3\r\n1  1  2  3\r\n2  1  2  4\r\n3  2  3  5\r\n\u7ed3\u679cDataFrame:\r\n    A  B  C\r\n0  1  2  3\r\n2  1  2  4\r\n3  2  3  5\r\n<\/code><\/pre>\n
    \u6e90DataFrame\u7684\u7b2c0\u884c\u548c\u7b2c1\u884c\u662f\u91cd\u590d\u7684\u3002\u4fdd\u7559\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u91cd\u590d\u884c\uff0c\u5220\u9664\u5176\u4f59\u7684\u91cd\u590d\u884c\u3002<\/p>\n
    2. \u5220\u9664\u91cd\u590d\u6570\u636e\u5e76\u4fdd\u7559\u6700\u540e\u4e00\u884c<\/h3>\n
    result_df = source_df.drop_duplicates(keep='last')\r\nprint('\u7ed3\u679cDataFrame:\\n', result_df)\r\n<\/code><\/pre>\n
    \u8f93\u51fa\uff1a<\/p>\n
    \u7ed3\u679cDataFrame:\r\n    A  B  C\r\n1  1  2  3\r\n2  1  2  4\r\n3  2  3  5\r\n<\/code><\/pre>\n
    \u5728\u8f93\u51fa\u4e2d\u5220\u9664\u7d22\u5f15”0″\uff0c\u5e76\u4fdd\u7559\u6700\u540e\u4e00\u4e2a\u91cd\u590d\u884c”1″\u3002<\/p>\n
    3. \u4eceDataFrame\u4e2d\u5220\u9664\u6240\u6709\u91cd\u590d\u7684\u884c<\/h3>\n
    result_df = source_df.drop_duplicates(keep=False)\r\nprint('\u7ed3\u679cDataFrame:\\n', result_df)\r\n<\/code><\/pre>\n
    \u8f93\u51fa\uff1a<\/p>\n
    \u7ed3\u679cDataFrame:\r\n    A  B  C\r\n2  1  2  4\r\n3  2  3  5\r\n<\/code><\/pre>\n
    \u5728\u7ed3\u679cDataFrame\u4e2d\uff0c\u91cd\u590d\u7684\u884c’0’\u548c’1’\u90fd\u88ab\u5220\u9664\u4e86\u3002<\/p>\n
    4. \u6839\u636e\u7279\u5b9a\u7684\u5217\u8bc6\u522b\u91cd\u590d\u7684\u884c<\/h3>\n
    import pandas as pd\r\n\r\nd1 = {'A': [1, 1, 1, 2], 'B': [2, 2, 2, 3], 'C': [3, 3, 4, 5]}\r\n\r\nsource_df = pd.DataFrame(d1)\r\nprint('\u6e90DataFrame:\\n', source_df)\r\n\r\nresult_df = source_df.drop_duplicates(subset=['A', 'B'])\r\nprint('\u7ed3\u679cDataFrame:\\n', result_df)\r\n<\/code><\/pre>\n
    \u8f93\u51fa\u7ed3\u679c:<\/p>\n
    \u6e90DataFrame:\r\n    A  B  C\r\n0  1  2  3\r\n1  1  2  3\r\n2  1  2  4\r\n3  2  3  5\r\n\u7ed3\u679cDataFrame:\r\n    A  B  C\r\n0  1  2  3\r\n3  2  3  5\r\n<\/code><\/pre>\n
    \u5217”A”\u548c”B”\u7528\u4e8e\u8bc6\u522b\u91cd\u590d\u884c\u3002\u56e0\u6b64\uff0c\u884c0\u30011\u548c2\u662f\u91cd\u590d\u7684\u3002\u56e0\u6b64\uff0c\u884c1\u548c2\u88ab\u4ece\u8f93\u51fa\u4e2d\u53bb\u9664\u3002<\/p>\n
    5. \u53bb\u9664\u91cd\u590d\u884c\u5e76\u5728\u539f\u5730\u8fdb\u884c\u5904\u7406<\/h3>\n
    source_df.drop_duplicates(inplace=True)\r\nprint(source_df)\r\n<\/code><\/pre>\n
    \u8f93\u51fa\uff1a<\/p>\n
       A  B  C\r\n0  1  2  3\r\n2  1  2  4\r\n3  2  3  5\r\n<\/code><\/pre>\n
    \u53c2\u8003\u6587\u732e<\/h2>\n
      \n
    • Python Pandas\u6a21\u5757\u6559\u7a0b<\/li>\n
    • Pandas DataFrame drop_duplicates() API\u6587\u6863<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
      Pandas drop_duplicates() \u51fd\u6570\u8bed\u6cd5 Pandas\u7684drop_duplicates()\u51fd […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[273,32,391],"class_list":["post-334","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-pandas","tag-python","tag-391"],"yoast_head":"\nPandas\u5220\u9664\u91cd\u590d\u884c\u5b8c\u5168\u6307\u5357\uff1adrop_duplicates()\u51fd\u6570\u8be6\u89e3\u4e0e\u5b9e\u4f8b - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86Pandas\u5e93\u4e2d\u5220\u9664\u91cd\u590d\u884c\u7684\u65b9\u6cd5\uff0c\u91cd\u70b9\u8bb2\u89e3drop_duplicates()\u51fd\u6570\u7684\u4f7f\u7528\u6280\u5de7\u3001\u53c2\u6570\u8bbe\u7f6e\u53ca\u5b9e\u9645\u5e94\u7528\u6848\u4f8b\u3002\u901a\u8fc7\u4e30\u5bcc\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u5e2e\u52a9\u60a8\u5feb\u901f\u638c\u63e1\u6570\u636e\u53bb\u91cd\u6280\u672f\uff0c\u63d0\u9ad8\u6570\u636e\u5904\u7406\u6548\u7387\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u718a\u732b-\u5220\u9664\u91cd\u590d\u884c-drop_duplicates-\u51fd\u6570\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pandas\u5220\u9664\u91cd\u590d\u884c\u5b8c\u5168\u6307\u5357\uff1adrop_duplicates()\u51fd\u6570\u8be6\u89e3\u4e0e\u5b9e\u4f8b\" \/>\n<meta property=\"og:description\" content=\"\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86Pandas\u5e93\u4e2d\u5220\u9664\u91cd\u590d\u884c\u7684\u65b9\u6cd5\uff0c\u91cd\u70b9\u8bb2\u89e3drop_duplicates()\u51fd\u6570\u7684\u4f7f\u7528\u6280\u5de7\u3001\u53c2\u6570\u8bbe\u7f6e\u53ca\u5b9e\u9645\u5e94\u7528\u6848\u4f8b\u3002\u901a\u8fc7\u4e30\u5bcc\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u5e2e\u52a9\u60a8\u5feb\u901f\u638c\u63e1\u6570\u636e\u53bb\u91cd\u6280\u672f\uff0c\u63d0\u9ad8\u6570\u636e\u5904\u7406\u6548\u7387\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u718a\u732b-\u5220\u9664\u91cd\u590d\u884c-drop_duplicates-\u51fd\u6570\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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