{"id":1062747,"date":"2024-12-31T15:54:36","date_gmt":"2024-12-31T07:54:36","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1062747.html"},"modified":"2024-12-31T15:54:38","modified_gmt":"2024-12-31T07:54:38","slug":"%e5%9c%a8python%e9%87%8c%e5%a6%82%e4%bd%95%e7%94%a8panda%e8%af%bb%e5%8f%96%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1062747.html","title":{"rendered":"\u5728python\u91cc\u5982\u4f55\u7528panda\u8bfb\u53d6\u6570\u636e"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2024\/12\/a0078299-2546-40ff-8da7-400ac5523d43.webp?x-oss-process=image\/auto-orient,1\/format,webp\" alt=\"\u5728python\u91cc\u5982\u4f55\u7528panda\u8bfb\u53d6\u6570\u636e\" \/><\/p>\n<p><p> <strong>\u5728Python\u91cc\u7528Pandas\u8bfb\u53d6\u6570\u636e\u7684\u6b65\u9aa4\uff1a\u5bfc\u5165Pandas\u5e93\u3001\u8bfb\u53d6CSV\u6587\u4ef6\u3001\u8bfb\u53d6Excel\u6587\u4ef6\u3001\u8bfb\u53d6\u6570\u636e\u5e93\u3001\u8bfb\u53d6JSON\u6587\u4ef6<\/strong>\uff0c\u5176\u4e2d\u5bfc\u5165Pandas\u5e93\u662f\u6700\u57fa\u7840\u7684\u4e00\u6b65\u3002\u4f7f\u7528Pandas\u5e93\u53ef\u4ee5\u8f7b\u677e\u5730\u5904\u7406\u6570\u636e\u5206\u6790\u4efb\u52a1\u3002\u4e3a\u4e86\u8be6\u7ec6\u5c55\u5f00\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u8ba8\u8bba\u5982\u4f55\u5728Python\u4e2d\u7528Pandas\u8bfb\u53d6\u5404\u79cd\u7c7b\u578b\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n<hr>\n<h2><strong>\u4e00\u3001\u5bfc\u5165Pandas\u5e93<\/strong><\/h2>\n<p><p>\u5728\u4f7f\u7528Pandas\u8fdb\u884c\u6570\u636e\u8bfb\u53d6\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5bfc\u5165Pandas\u5e93\u3002Pandas\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u548c\u5206\u6790\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u8bb8\u591a\u4fbf\u6377\u7684\u6570\u636e\u64cd\u4f5c\u65b9\u6cd5\u3002\u5bfc\u5165Pandas\u5e93\u7684\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import pandas as pd<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u901a\u8fc7\u4e0a\u8ff0\u4ee3\u7801\uff0c\u6211\u4eec\u5bfc\u5165\u4e86Pandas\u5e93\uff0c\u5e76\u5c06\u5176\u91cd\u547d\u540d\u4e3a<code>pd<\/code>\uff0c\u4ee5\u65b9\u4fbf\u540e\u7eed\u4f7f\u7528\u3002<\/p>\n<\/p>\n<h2><strong>\u4e8c\u3001\u8bfb\u53d6CSV\u6587\u4ef6<\/strong><\/h2>\n<p><p>CSV\uff08Comma Separated Values\uff09\u6587\u4ef6\u662f\u6700\u5e38\u89c1\u7684\u6570\u636e\u683c\u5f0f\u4e4b\u4e00\u3002Pandas\u63d0\u4f9b\u4e86<code>read_csv<\/code>\u51fd\u6570\u6765\u8bfb\u53d6CSV\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8bfb\u53d6CSV\u6587\u4ef6\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">df = pd.read_csv(&#39;data.csv&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c<code>pd.read_csv<\/code>\u51fd\u6570\u8bfb\u53d6\u4e86\u540d\u4e3a<code>data.csv<\/code>\u7684CSV\u6587\u4ef6\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5728<code>df<\/code>\u53d8\u91cf\u4e2d\u3002\u6b64\u65f6\uff0c<code>df<\/code>\u662f\u4e00\u4e2aDataFrame\u5bf9\u8c61\uff0c\u53ef\u4ee5\u7528\u4e8e\u8fdb\u4e00\u6b65\u7684\u6570\u636e\u64cd\u4f5c\u548c\u5206\u6790\u3002<\/p>\n<\/p>\n<p><p>\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3\u6570\u636e\u7ed3\u6784\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u67e5\u770b\u6570\u636e\u7684\u57fa\u672c\u4fe1\u606f\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">print(df.head())  # \u67e5\u770b\u524d5\u884c\u6570\u636e<\/p>\n<p>print(df.info())  # \u67e5\u770b\u6570\u636e\u7c7b\u578b\u548c\u5185\u5b58\u4fe1\u606f<\/p>\n<p>print(df.describe())  # \u67e5\u770b\u6570\u636e\u7684\u7edf\u8ba1\u4fe1\u606f<\/p>\n<p><\/code><\/pre>\n<\/p>\n<h2><strong>\u4e09\u3001\u8bfb\u53d6Excel\u6587\u4ef6<\/strong><\/h2>\n<p><p>Pandas\u8fd8\u63d0\u4f9b\u4e86\u8bfb\u53d6Excel\u6587\u4ef6\u7684\u529f\u80fd\u3002\u53ef\u4ee5\u4f7f\u7528<code>read_excel<\/code>\u51fd\u6570\u6765\u8bfb\u53d6Excel\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8bfb\u53d6Excel\u6587\u4ef6\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">df = pd.read_excel(&#39;data.xlsx&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c<code>pd.read_excel<\/code>\u51fd\u6570\u8bfb\u53d6\u4e86\u540d\u4e3a<code>data.xlsx<\/code>\u7684Excel\u6587\u4ef6\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5728<code>df<\/code>\u53d8\u91cf\u4e2d\u3002\u540c\u6837\u5730\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<code>head<\/code>\u3001<code>info<\/code>\u548c<code>describe<\/code>\u65b9\u6cd5\u67e5\u770b\u6570\u636e\u7684\u57fa\u672c\u4fe1\u606f\u3002<\/p>\n<\/p>\n<p><p>\u5982\u679cExcel\u6587\u4ef6\u4e2d\u5305\u542b\u591a\u4e2a\u5de5\u4f5c\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528<code>sheet_name<\/code>\u53c2\u6570\u6307\u5b9a\u8981\u8bfb\u53d6\u7684\u5de5\u4f5c\u8868\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">df = pd.read_excel(&#39;data.xlsx&#39;, sheet_name=&#39;Sheet1&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<h2><strong>\u56db\u3001\u8bfb\u53d6\u6570\u636e\u5e93<\/strong><\/h2>\n<p><p>\u9664\u4e86CSV\u548cExcel\u6587\u4ef6\uff0cPandas\u8fd8\u53ef\u4ee5\u4ece\u6570\u636e\u5e93\u4e2d\u8bfb\u53d6\u6570\u636e\u3002\u5e38\u89c1\u7684\u6570\u636e\u5e93\u5305\u62ecMySQL\u3001PostgreSQL\u3001SQLite\u7b49\u3002\u4e3a\u4e86\u8fde\u63a5\u548c\u8bfb\u53d6\u6570\u636e\u5e93\u6570\u636e\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528SQLAlchemy\u5e93\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4eceMySQL\u6570\u636e\u5e93\u8bfb\u53d6\u6570\u636e\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from sqlalchemy import create_engine<\/p>\n<h2><strong>\u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5<\/strong><\/h2>\n<p>engine = create_engine(&#39;mysql+pymysql:\/\/username:password@host:port\/database&#39;)<\/p>\n<h2><strong>\u6267\u884c\u67e5\u8be2\u5e76\u8bfb\u53d6\u6570\u636e<\/strong><\/h2>\n<p>df = pd.read_sql(&#39;SELECT * FROM table_name&#39;, con=engine)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u5bfc\u5165\u4e86<code>create_engine<\/code>\u51fd\u6570\uff0c\u5e76\u4f7f\u7528\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u6570\u636e\u5e93\u8fde\u63a5\u3002\u63a5\u7740\uff0c\u6211\u4eec\u4f7f\u7528<code>pd.read_sql<\/code>\u51fd\u6570\u6267\u884cSQL\u67e5\u8be2\uff0c\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728<code>df<\/code>\u53d8\u91cf\u4e2d\u3002<\/p>\n<\/p>\n<h2><strong>\u4e94\u3001\u8bfb\u53d6JSON\u6587\u4ef6<\/strong><\/h2>\n<p><p>JSON\uff08JavaScript Object Notation\uff09\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u6570\u636e\u4ea4\u6362\u683c\u5f0f\u3002Pandas\u63d0\u4f9b\u4e86<code>read_json<\/code>\u51fd\u6570\u6765\u8bfb\u53d6JSON\u6587\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u8bfb\u53d6JSON\u6587\u4ef6\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">df = pd.read_json(&#39;data.json&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c<code>pd.read_json<\/code>\u51fd\u6570\u8bfb\u53d6\u4e86\u540d\u4e3a<code>data.json<\/code>\u7684JSON\u6587\u4ef6\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5728<code>df<\/code>\u53d8\u91cf\u4e2d\u3002\u540c\u6837\u5730\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<code>head<\/code>\u3001<code>info<\/code>\u548c<code>describe<\/code>\u65b9\u6cd5\u67e5\u770b\u6570\u636e\u7684\u57fa\u672c\u4fe1\u606f\u3002<\/p>\n<\/p>\n<p><p>\u5982\u679cJSON\u6587\u4ef6\u5305\u542b\u5d4c\u5957\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528<code>json_normalize<\/code>\u51fd\u6570\u5c06\u5176\u5c55\u5e73\u4e3a\u5e73\u9762\u8868\u683c\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from pandas import json_normalize<\/p>\n<h2><strong>\u8bfb\u53d6\u5d4c\u5957JSON\u6587\u4ef6<\/strong><\/h2>\n<p>data = pd.read_json(&#39;nested_data.json&#39;)<\/p>\n<h2><strong>\u5c55\u5e73\u5d4c\u5957\u6570\u636e<\/strong><\/h2>\n<p>df = json_normalize(data)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<hr>\n<p><p>\u901a\u8fc7\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u6211\u4eec\u5df2\u7ecf\u8be6\u7ec6\u8ba8\u8bba\u4e86\u5982\u4f55\u5728Python\u4e2d\u4f7f\u7528Pandas\u5e93\u8bfb\u53d6\u5404\u79cd\u7c7b\u578b\u7684\u6570\u636e\u3002\u65e0\u8bba\u662fCSV\u3001Excel\u3001\u6570\u636e\u5e93\u8fd8\u662fJSON\u6587\u4ef6\uff0cPandas\u90fd\u63d0\u4f9b\u4e86\u7b80\u6d01\u4e14\u5f3a\u5927\u7684\u6570\u636e\u8bfb\u53d6\u529f\u80fd\u3002\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\u5c06\u6781\u5927\u5730\u63d0\u9ad8\u6570\u636e\u5904\u7406\u548c\u5206\u6790\u7684\u6548\u7387\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5b89\u88c5Pandas\u5e93\u4ee5\u4fbf\u5728Python\u4e2d\u8bfb\u53d6\u6570\u636e\uff1f<\/strong><br \/>\u8981\u5728Python\u4e2d\u4f7f\u7528Pandas\u8bfb\u53d6\u6570\u636e\uff0c\u9996\u5148\u9700\u8981\u786e\u4fdd\u5df2\u5b89\u88c5\u8be5\u5e93\u3002\u53ef\u4ee5\u901a\u8fc7\u5728\u547d\u4ee4\u884c\u4e2d\u8fd0\u884c<code>pip install pandas<\/code>\u6765\u5b89\u88c5Pandas\u3002\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u5c31\u53ef\u4ee5\u5728Python\u811a\u672c\u4e2d\u5bfc\u5165Pandas\u5e93\uff0c\u4f7f\u7528<code>import pandas as pd<\/code>\u6765\u8fdb\u884c\u6570\u636e\u64cd\u4f5c\u3002<\/p>\n<p><strong>Pandas\u652f\u6301\u54ea\u4e9b\u6570\u636e\u683c\u5f0f\u7684\u8bfb\u53d6\uff1f<\/strong><br \/>Pandas\u80fd\u591f\u8bfb\u53d6\u591a\u79cd\u6570\u636e\u683c\u5f0f\uff0c\u5305\u62ecCSV\u3001Excel\u3001JSON\u3001SQL\u6570\u636e\u5e93\u7b49\u3002\u5bf9\u4e8eCSV\u6587\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528<code>pd.read_csv(&#39;file_path.csv&#39;)<\/code>\u8bfb\u53d6\uff1b\u5bf9\u4e8eExcel\u6587\u4ef6\uff0c\u4f7f\u7528<code>pd.read_excel(&#39;file_path.xlsx&#39;)<\/code>\uff1bJSON\u6587\u4ef6\u5219\u4f7f\u7528<code>pd.read_json(&#39;file_path.json&#39;)<\/code>\u7b49\u51fd\u6570\uff0c\u4ee5\u4fbf\u7075\u6d3b\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u6e90\u3002<\/p>\n<p><strong>\u5728\u8bfb\u53d6\u6570\u636e\u65f6\u5982\u4f55\u5904\u7406\u7f3a\u5931\u503c\uff1f<\/strong><br \/>\u5728\u4f7f\u7528Pandas\u8bfb\u53d6\u6570\u636e\u65f6\uff0c\u5e38\u5e38\u4f1a\u9047\u5230\u7f3a\u5931\u503c\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e<code>na_values<\/code>\u53c2\u6570\u6765\u6307\u5b9a\u54ea\u4e9b\u503c\u5e94\u89c6\u4e3a\u7f3a\u5931\uff0c\u6216\u5728\u8bfb\u53d6\u540e\u4f7f\u7528<code>df.fillna(value)<\/code>\u6765\u586b\u5145\u7f3a\u5931\u503c\u3002\u6b64\u5916\uff0c\u4f7f\u7528<code>df.dropna()<\/code>\u53ef\u4ee5\u5220\u9664\u5305\u542b\u7f3a\u5931\u503c\u7684\u884c\u6216\u5217\uff0c\u4ece\u800c\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u91cc\u7528Pandas\u8bfb\u53d6\u6570\u636e\u7684\u6b65\u9aa4\uff1a\u5bfc\u5165Pandas\u5e93\u3001\u8bfb\u53d6CSV\u6587\u4ef6\u3001\u8bfb\u53d6Excel\u6587\u4ef6\u3001\u8bfb\u53d6\u6570\u636e [&hellip;]","protected":false},"author":3,"featured_media":1062754,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1062747"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1062747"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1062747\/revisions"}],"predecessor-version":[{"id":1062756,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1062747\/revisions\/1062756"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1062754"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1062747"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1062747"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1062747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}