{"id":563,"date":"2024-12-26T23:07:11","date_gmt":"2024-12-26T15:07:11","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=563"},"modified":"2024-12-26T23:07:11","modified_gmt":"2024-12-26T15:07:11","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-pandas-%e4%b8%ad%ef%bc%8c%e9%87%8d%e5%91%bd%e5%90%8d-dataframe-%e7%9a%84%e5%88%97%e6%a0%87%e9%a2%98%ef%bc%88%e5%88%97%e5%90%8d%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2024\/12\/26\/%e5%a6%82%e4%bd%95%e5%9c%a8-pandas-%e4%b8%ad%ef%bc%8c%e9%87%8d%e5%91%bd%e5%90%8d-dataframe-%e7%9a%84%e5%88%97%e6%a0%87%e9%a2%98%ef%bc%88%e5%88%97%e5%90%8d%ef%bc%89\/","title":{"rendered":"\u5982\u4f55\u5728 Pandas \u4e2d\uff0c\u91cd\u547d\u540d DataFrame \u7684\u5217\u6807\u9898\uff08\u5217\u540d\uff09"},"content":{"rendered":"\n
\n

\u5728 Pandas \u4e2d\uff0c\u91cd\u547d\u540d DataFrame \u7684\u5217\u6807\u9898\uff08\u5217\u540d\uff09\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u64cd\u4f5c\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u51e0\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5\u6765\u5b8c\u6210\u6b64\u4efb\u52a1\uff0c\u5177\u4f53\u65b9\u6cd5\u53d6\u51b3\u4e8e\u4f60\u7684\u9700\u6c42\u548c\u60c5\u51b5\u3002\u4ee5\u4e0b\u662f\u51e0\u79cd\u6709\u6548\u7684\u91cd\u547d\u540d\u5217\u6807\u9898\u7684\u65b9\u6cd5\uff1a<\/p>\n<\/blockquote>\n\n\n\n

1. \u4f7f\u7528 rename()<\/code> \u65b9\u6cd5<\/strong><\/h3>\n\n\n\n

rename()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7\u4f20\u5165\u4e00\u4e2a\u5b57\u5178\u6765\u91cd\u547d\u540d\u5355\u4e2a\u6216\u591a\u4e2a\u5217\u3002\u5b57\u5178\u7684\u952e\u662f\u65e7\u5217\u540d\uff0c\u503c\u662f\u65b0\u5217\u540d\u3002<\/p>\n\n\n\n

\u793a\u4f8b\uff1a<\/h4>\n\n\n\n
import pandas as pd\n\n# \u521b\u5efa\u793a\u4f8b DataFrame\ndf = pd.DataFrame({\n    'A': [1, 2, 3],\n    'B': [4, 5, 6],\n    'C': [7, 8, 9]\n})\n\n# \u4f7f\u7528 rename() \u91cd\u547d\u540d\u5217\ndf = df.rename(columns={'A': 'Column1', 'B': 'Column2'})\nprint(df)<\/code><\/pre>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
   Column1  Column2  C\n0        1        4  7\n1        2        5  8\n2        3        6  9<\/code><\/pre>\n\n\n\n
\u6ce8\u610f\uff1a<\/strong> \u4f7f\u7528 rename()<\/code> \u9ed8\u8ba4\u4f1a\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684 DataFrame\u3002\u5982\u679c\u4f60\u5e0c\u671b\u4fee\u6539\u539f\u59cb DataFrame\uff0c\u53ef\u4ee5\u8bbe\u7f6e inplace=True<\/code>\u3002<\/p>\n\n\n\n
df.rename(columns={'A': 'Column1', 'B': 'Column2'}, inplace=True)<\/code><\/pre>\n\n\n\n
\n\n\n\n
2. \u76f4\u63a5\u8d4b\u503c\u7ed9 columns<\/code> \u5c5e\u6027<\/strong><\/h3>\n\n\n\n
\u5982\u679c\u4f60\u60f3\u8981\u91cd\u547d\u540d\u6240\u6709\u5217\uff0c\u53ef\u4ee5\u76f4\u63a5\u5c06\u4e00\u4e2a\u65b0\u7684\u5217\u540d\u5217\u8868\u8d4b\u503c\u7ed9 df.columns<\/code>\u3002<\/p>\n\n\n\n
\u793a\u4f8b\uff1a<\/h4>\n\n\n\n
# \u91cd\u547d\u540d\u6240\u6709\u5217\ndf.columns = ['Column1', 'Column2', 'Column3']\nprint(df)<\/code><\/pre>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
   Column1  Column2  Column3\n0        1        4        7\n1        2        5        8\n2        3        6        9<\/code><\/pre>\n\n\n\n
\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u91cd\u547d\u540d\u6240\u6709\u5217\u65f6\uff0c\u4e14\u5217\u6570\u4e0e\u539f DataFrame \u7684\u5217\u6570\u76f8\u5339\u914d\u3002<\/p>\n\n\n\n
\n\n\n\n
3. \u4f7f\u7528 set_axis()<\/code> \u65b9\u6cd5<\/strong><\/h3>\n\n\n\n
set_axis()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u91cd\u65b0\u8bbe\u7f6e DataFrame \u7684\u8f74\uff08\u5305\u62ec\u5217\u540d\uff09\u3002\u901a\u8fc7\u5c06\u5217\u540d\u5217\u8868\u4f20\u9012\u7ed9 set_axis()<\/code>\uff0c\u53ef\u4ee5\u91cd\u547d\u540d\u5217\u3002<\/p>\n\n\n\n
\u793a\u4f8b\uff1a<\/h4>\n\n\n\n
# \u4f7f\u7528 set_axis \u91cd\u547d\u540d\u5217\ndf = df.set_axis(['Column1', 'Column2', 'Column3'], axis=1, inplace=False)\nprint(df)<\/code><\/pre>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
   Column1  Column2  Column3\n0        1        4        7\n1        2        5        8\n2        3        6        9<\/code><\/pre>\n\n\n\n
\u5982\u679c\u4f60\u5e0c\u671b\u5c31\u5730\u4fee\u6539 DataFrame\uff0c\u53ef\u4ee5\u8bbe\u7f6e inplace=True<\/code>\u3002<\/p>\n\n\n\n
df.set_axis(['Column1', 'Column2', 'Column3'], axis=1, inplace=True)<\/code><\/pre>\n\n\n\n
\n\n\n\n
4. \u4f7f\u7528 add_prefix()<\/code> \u548c add_suffix()<\/code><\/strong><\/h3>\n\n\n\n
\u5982\u679c\u4f60\u5e0c\u671b\u4e3a\u6240\u6709\u5217\u540d\u6dfb\u52a0\u4e00\u4e2a\u524d\u7f00\u6216\u540e\u7f00\uff0c\u53ef\u4ee5\u4f7f\u7528 add_prefix()<\/code> \u6216 add_suffix()<\/code> \u65b9\u6cd5\u3002\u8fd9\u5bf9\u4e8e\u6279\u91cf\u4fee\u6539\u5217\u540d\u65f6\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n\n\n\n
\u793a\u4f8b\uff1a<\/h4>\n\n\n\n
# \u7ed9\u6240\u6709\u5217\u540d\u6dfb\u52a0\u524d\u7f00\ndf = df.add_prefix('Prefix_')\nprint(df)<\/code><\/pre>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
   Prefix_Column1  Prefix_Column2  Prefix_Column3\n0               1               4               7\n1               2               5               8\n2               3               6               9<\/code><\/pre>\n\n\n\n
\u540c\u6837\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 add_suffix()<\/code> \u6765\u4e3a\u5217\u540d\u6dfb\u52a0\u540e\u7f00\u3002<\/p>\n\n\n\n
# \u7ed9\u6240\u6709\u5217\u540d\u6dfb\u52a0\u540e\u7f00\ndf = df.add_suffix('_Suffix')\nprint(df)<\/code><\/pre>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
   Column1_Suffix  Column2_Suffix  Column3_Suffix\n0               1               4               7\n1               2               5               8\n2               3               6               9<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u603b\u7ed3<\/h3>\n\n\n\n
    \n
  1. rename()<\/code><\/strong>\uff1a\u9002\u7528\u4e8e\u90e8\u5206\u5217\u91cd\u547d\u540d\uff0c\u7075\u6d3b\u4e14\u53ef\u7528\u4e8e\u5355\u72ec\u6216\u591a\u4e2a\u5217\u3002<\/li>\n\n\n\n
  2. \u76f4\u63a5\u8d4b\u503c\u7ed9 columns<\/code><\/strong>\uff1a\u9002\u7528\u4e8e\u91cd\u547d\u540d\u6240\u6709\u5217\u65f6\uff0c\u7b80\u6d01\u9ad8\u6548\u3002<\/li>\n\n\n\n
  3. set_axis()<\/code><\/strong>\uff1a\u53ef\u7528\u4e8e\u66f4\u6539\u6574\u4e2a\u8f74\uff08\u5217\u6216\u884c\uff09\uff0c\u9002\u5408\u6279\u91cf\u66f4\u6539\u5217\u540d\u3002<\/li>\n\n\n\n
  4. add_prefix()<\/code> \u548c add_suffix()<\/code><\/strong>\uff1a\u7528\u4e8e\u4e3a\u5217\u540d\u6dfb\u52a0\u7edf\u4e00\u7684\u524d\u7f00\u6216\u540e\u7f00\uff0c\u6279\u91cf\u5904\u7406\u65f6\u975e\u5e38\u65b9\u4fbf\u3002<\/li>\n<\/ol>\n\n\n\n
    \u9009\u62e9\u9002\u5f53\u7684\u91cd\u547d\u540d\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8ba9\u4f60\u7684\u4ee3\u7801\u66f4\u6e05\u6670\u4e14\u6613\u4e8e\u7ef4\u62a4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728 Pandas \u4e2d\uff0c\u91cd\u547d\u540d DataFrame \u7684\u5217\u6807\u9898\uff08\u5217\u540d\uff09\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u64cd\u4f5c\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u51e0\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5\u6765 […]<\/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-563","post","type-post","status-publish","format-standard","hentry","category-python"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/563","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=563"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/563\/revisions"}],"predecessor-version":[{"id":564,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/563\/revisions\/564"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}