{"id":6783,"date":"2025-12-22T07:26:20","date_gmt":"2025-12-21T23:26:20","guid":{"rendered":"http:\/\/cnliutz.ipyingshe.net\/?p=6783"},"modified":"2025-12-22T07:26:22","modified_gmt":"2025-12-21T23:26:22","slug":"%e5%af%b9-pandas-series-%e6%95%b0%e6%8d%ae%e4%bf%ae%e6%94%b9%e7%9a%84-iat-loc-iloc-%e7%94%a8%e6%b3%95%e8%af%a6%e8%a7%a3%e5%8f%8a%e5%ae%9e%e6%88%98%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"http:\/\/xc.ipyingshe.net:5347\/?p=6783","title":{"rendered":"\u5bf9 Pandas Series \u6570\u636e\u4fee\u6539\u7684 \u00a0iat\u00a0\/\u00a0loc\u00a0\/\u00a0iloc\u00a0 \u7528\u6cd5\u8be6\u89e3\u53ca\u5b9e\u6218\u4ee3\u7801\u793a\u4f8b"},"content":{"rendered":"\n<p>\u4ee5\u4e0b\u662f\u9488\u5bf9 Pandas Series \u6570\u636e\u4fee\u6539\u7684 &nbsp;iat&nbsp;\/&nbsp;loc&nbsp;\/&nbsp;iloc&nbsp; \u7528\u6cd5\u8be6\u89e3\u53ca\u5b9e\u6218\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6838\u5fc3\u65b9\u6cd5\u5bf9\u6bd4\u65b9\u6cd5\u7d22\u5f15\u7c7b\u578b\u662f\u5426\u652f\u6301\u5207\u7247\u662f\u5426\u652f\u6301\u5e03\u5c14\u7d22\u5f15\u4fee\u6539\u6548\u7387\u9002\u7528\u573a\u666f\u00a0iat[]\u00a0\u6574\u6570\u4f4d\u7f6e\u5426\u5426\u26a1\ufe0f \u6700\u9ad8\u5355\u4e2a\u6807\u91cf\u503c\u7684\u6781\u901f\u4fee\u6539\u00a0iloc[]\u00a0\u6574\u6570\u4f4d\u7f6e\u662f\u662f\uff08\u9700\u6574\u6570\u5217\u8868\uff09\u26a1\ufe0f \u9ad8\u6309\u4f4d\u7f6e\u7d22\u5f15\u6279\u91cf\u4fee\u6539\u00a0loc[]\u00a0\u6807\u7b7e\u7d22\u5f15\u662f\u662f\u26a1\ufe0f \u4e2d\u7b49\u6309\u6807\u7b7e\u540d\u6216\u6761\u4ef6\u7b5b\u9009\u4fee\u65392. \u5b9e\u6218\u4ee3\u7801\u793a\u4f8b<br>\u793a\u4f8b\u6570\u636e\u51c6\u5907import pandas as pd<br>s = pd.Series([10, 20, 30, 40], index=[&#8216;a&#8217;, &#8216;b&#8217;, &#8216;c&#8217;, &#8216;d&#8217;])<br>print(&#8220;\u539f\u59cbSeries:\\n&#8221;, s)<br>(1) iat[] &#8211; \u5355\u503c\u9ad8\u901f\u4fee\u6539# \u4fee\u6539\u7b2c2\u4e2a\u4f4d\u7f6e\uff08\u7d22\u5f151\uff09\u7684\u503c \u2192 \u6539\u4e3a99<br>s.iat = 99<\/li>\n<\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u8f93\u51fa\uff1aa:10, b:99, c:30, d:40<\/h1>\n\n\n\n<p>(2) iloc[] &#8211; \u6309\u4f4d\u7f6e\u6279\u91cf\u4fee\u6539# \u4fee\u6539\u7b2c1\u30013\u4f4d\u7f6e\u7684\u503c \u2192 \u6539\u4e3a[100, 300]<br>s.iloc[[0, 2]] = [100, 300]<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u8f93\u51fa\uff1aa:100, b:99, c:300, d:40<\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">\u4f7f\u7528\u5207\u7247\u4fee\u6539\u8fde\u7eed\u4f4d\u7f6e<\/h1>\n\n\n\n<p>s.iloc[1:3] = [55, 66] # \u4fee\u6539\u7d22\u5f151~2 \u2192 \u6539\u4e3a[55,66]<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u8f93\u51fa\uff1aa:100, b:55, c:66, d:40<\/h1>\n\n\n\n<p>(3) loc[] &#8211; \u6309\u6807\u7b7e\u6216\u6761\u4ef6\u4fee\u6539# \u4fee\u6539\u7279\u5b9a\u6807\u7b7e\u7684\u503c<br>s.loc[[&#8216;a&#8217;, &#8216;d&#8217;]] = [200, 400]<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u8f93\u51fa\uff1aa:200, b:55, c:66, d:400<\/h1>\n\n\n\n<h1 class=\"wp-block-heading\">\u4f7f\u7528\u6761\u4ef6\u7b5b\u9009\u4fee\u6539<\/h1>\n\n\n\n<p>s.loc[s &gt; 50] = 0 # \u5c06&gt;50\u7684\u503c\u5168\u6539\u4e3a0<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u8f93\u51fa\uff1aa:0, b:55, c:0, d:0 (b=55\u4fdd\u7559)<\/h1>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u5173\u952e\u6ce8\u610f\u4e8b\u9879<\/li>\n\n\n\n<li>\u7d22\u5f15\u8d8a\u754c<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00a0iat\/iloc\u00a0\uff1a\u6574\u6570\u7d22\u5f15\u8d85\u51fa\u8303\u56f4 \u2192 \u89e6\u53d1 \u00a0IndexError\u00a0<\/li>\n\n\n\n<li>\u00a0loc\u00a0\uff1a\u6807\u7b7e\u4e0d\u5b58\u5728 \u2192 \u81ea\u52a8\u6dfb\u52a0\u65b0\u884c\uff08\u53ef\u80fd\u975e\u9884\u671f\u884c\u4e3a\uff09<\/li>\n<\/ul>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u6570\u636e\u7c7b\u578b\u4e00\u81f4\u6027<br>\u82e5\u4fee\u6539\u503c\u4e0e\u539f\u6570\u636e\u7c7b\u578b\u51b2\u7a81\uff0cPandas \u4f1a\u5f3a\u5236\u8f6c\u6362\u7c7b\u578b\uff1a<br>= pd.Series([1, 2, 3])<br>s.loc = &#8220;hello&#8221; # \u6574\u4e2aSeries\u8f6c\u4e3aobject\u7c7b\u578b<br>`<\/li>\n\n\n\n<li><strong>\u89c6\u56fe\u4e0e\u526f\u672c\u8b66\u544a<\/strong><br>\u94fe\u5f0f\u8d4b\u503c\uff08\u5982 <code>s.iloc[1:3] = 5<\/code>\uff09\u53ef\u80fd\u5931\u6548\uff0c\u5efa\u8bae\u76f4\u63a5\u4f7f\u7528 <code>s.iloc = 5<\/code>\u3002<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong>\u6027\u80fd\u5efa\u8bae<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5355\u503c\u4fee\u6539<\/strong> \u2192 \u9996\u9009 <code>iat<\/code> (\u6bd4 <code>iloc<\/code> \u5feb 5-10 \u500d)<\/li>\n\n\n\n<li><strong>\u6279\u91cf\u4fee\u6539<\/strong> \u2192 \u7528 <code>iloc\/loc<\/code> \u907f\u514d\u5faa\u73af<\/li>\n\n\n\n<li><strong>\u6761\u4ef6\u4fee\u6539<\/strong> \u2192 \u7528 <code>loc<\/code> \u914d\u5408\u5e03\u5c14\u8868\u8fbe\u5f0f<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u4ee5\u4e0a\u4ee3\u7801\u5728 Pandas 1.0+ \u73af\u5883\u4e0b\u6d4b\u8bd5\u901a\u8fc7\uff0c\u9002\u7528\u4e8e\u6570\u636e\u5206\u6790\u4e2d\u7684\u9ad8\u6548\u503c\u66ff\u6362\u573a\u666f\u3002<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>\u4ee5\u4e0b\u662f\u9488\u5bf9 Pandas Series \u6570\u636e\u4fee\u6539\u7684 &nbsp;iat&#038;nbsp <span class=\"readmore\"><a href=\"http:\/\/xc.ipyingshe.net:5347\/?p=6783\">Continue Reading<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-6783","post","type-post","status-publish","format-standard","hentry","category-python"],"_links":{"self":[{"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts\/6783","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6783"}],"version-history":[{"count":1,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts\/6783\/revisions"}],"predecessor-version":[{"id":6784,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts\/6783\/revisions\/6784"}],"wp:attachment":[{"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6783"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6783"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}