{"id":1117867,"date":"2025-01-08T18:29:59","date_gmt":"2025-01-08T10:29:59","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1117867.html"},"modified":"2025-01-08T18:30:02","modified_gmt":"2025-01-08T10:30:02","slug":"python%e5%a6%82%e4%bd%95%e5%8f%96csv%e4%b8%ad%e7%9a%84%e5%ad%97%e7%ac%a6%e4%b8%b2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1117867.html","title":{"rendered":"python\u5982\u4f55\u53d6csv\u4e2d\u7684\u5b57\u7b26\u4e32"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25081617\/b64b746b-143c-4397-a817-75ce8cb99f5a.webp\" alt=\"python\u5982\u4f55\u53d6csv\u4e2d\u7684\u5b57\u7b26\u4e32\" \/><\/p>\n<p><p> <strong>Python\u5982\u4f55\u53d6CSV\u4e2d\u7684\u5b57\u7b26\u4e32<\/strong><\/p>\n<\/p>\n<p><p><strong>\u4f7f\u7528Python\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u5982\u4f7f\u7528\u5185\u7f6e\u7684csv\u6a21\u5757\u3001pandas\u5e93\u3001numpy\u5e93\u7b49\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u90fd\u975e\u5e38\u4fbf\u6377\u3001\u6613\u7528\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5e76\u91cd\u70b9\u8bb2\u89e3\u5982\u4f55\u4f7f\u7528pandas\u5e93\u6765\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u3002<\/strong><\/p>\n<\/p>\n<p><p>\u4f7f\u7528pandas\u5e93\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u4e0d\u4ec5\u64cd\u4f5c\u7b80\u5355\uff0c\u800c\u4e14\u529f\u80fd\u5f3a\u5927\uff0c\u652f\u6301\u591a\u79cd\u6570\u636e\u64cd\u4f5c\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528pandas\u5e93\u6765\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u4f7f\u7528csv\u6a21\u5757\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n<p><h4>1\u3001csv\u6a21\u5757\u4ecb\u7ecd<\/h4>\n<\/p>\n<p><p>Python\u81ea\u5e26\u7684csv\u6a21\u5757\u662f\u5904\u7406CSV\u6587\u4ef6\u7684\u6807\u51c6\u5de5\u5177\u3002\u5b83\u63d0\u4f9b\u4e86reader\u548cwriter\u5bf9\u8c61\u6765\u5206\u522b\u8bfb\u53d6\u548c\u5199\u5165CSV\u6587\u4ef6\u3002\u6b64\u5916\uff0c\u8fd8\u6709DictReader\u548cDictWriter\u5bf9\u8c61\uff0c\u53ef\u4ee5\u5c06CSV\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u8bfb\u5165\u548c\u5199\u51fa\u5b57\u5178\u683c\u5f0f\u3002<\/p>\n<\/p>\n<p><h4>2\u3001\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528csv\u6a21\u5757\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u975e\u5e38\u7b80\u5355\u3002\u9996\u5148\u9700\u8981\u4f7f\u7528open\u51fd\u6570\u6253\u5f00CSV\u6587\u4ef6\uff0c\u7136\u540e\u521b\u5efa\u4e00\u4e2acsv.reader\u5bf9\u8c61\uff0c\u6700\u540e\u4f7f\u7528for\u5faa\u73af\u904d\u5386reader\u5bf9\u8c61\u5373\u53ef\u3002<\/p>\n<\/p>\n<p><p>\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import csv<\/p>\n<h2><strong>\u6253\u5f00CSV\u6587\u4ef6<\/strong><\/h2>\n<p>with open(&#39;example.csv&#39;, &#39;r&#39;, encoding=&#39;utf-8&#39;) as file:<\/p>\n<p>    reader = csv.reader(file)<\/p>\n<p>    # \u904d\u5386\u6bcf\u4e00\u884c<\/p>\n<p>    for row in reader:<\/p>\n<p>        print(row)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>example.csv<\/code>\u662f\u8981\u8bfb\u53d6\u7684CSV\u6587\u4ef6\u3002<code>csv.reader<\/code>\u5bf9\u8c61\u5c06\u6587\u4ef6\u4e2d\u7684\u6bcf\u4e00\u884c\u8bfb\u53d6\u4e3a\u4e00\u4e2a\u5217\u8868\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u4f7f\u7528pandas\u5e93\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n<p><h4>1\u3001pandas\u5e93\u4ecb\u7ecd<\/h4>\n<\/p>\n<p><p>pandas\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u548c\u5206\u6790\u5e93\u3002\u5b83\u63d0\u4f9b\u4e86\u9ad8\u5ea6\u4f18\u5316\u7684\u6570\u636e\u7ed3\u6784\u548c\u5206\u6790\u5de5\u5177\uff0c\u7279\u522b\u9002\u5408\u5904\u7406\u8868\u683c\u6570\u636e\u3002pandas\u5e93\u4e2d\u7684DataFrame\u5bf9\u8c61\u53ef\u4ee5\u65b9\u4fbf\u5730\u5904\u7406CSV\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n<p><h4>2\u3001\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528pandas\u5e93\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u975e\u5e38\u7b80\u5355\u3002\u9996\u5148\u9700\u8981\u5bfc\u5165pandas\u5e93\uff0c\u7136\u540e\u4f7f\u7528<code>pandas.read_csv<\/code>\u51fd\u6570\u8bfb\u53d6CSV\u6587\u4ef6\u5373\u53ef\u3002<\/p>\n<\/p>\n<p><p>\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import pandas as pd<\/p>\n<h2><strong>\u8bfb\u53d6CSV\u6587\u4ef6<\/strong><\/h2>\n<p>df = pd.read_csv(&#39;example.csv&#39;)<\/p>\n<h2><strong>\u8f93\u51faDataFrame<\/strong><\/h2>\n<p>print(df)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>example.csv<\/code>\u662f\u8981\u8bfb\u53d6\u7684CSV\u6587\u4ef6\u3002<code>pandas.read_csv<\/code>\u51fd\u6570\u5c06\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u8bfb\u53d6\u4e3a\u4e00\u4e2aDataFrame\u5bf9\u8c61\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c\u6570\u636e\u64cd\u4f5c\u548c\u5206\u6790\u3002<\/p>\n<\/p>\n<p><h4>3\u3001\u9009\u62e9\u7279\u5b9a\u5217<\/h4>\n<\/p>\n<p><p>\u6709\u65f6\u6211\u4eec\u53ea\u9700\u8981\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u67d0\u4e9b\u5217\u3002\u53ef\u4ee5\u4f7f\u7528<code>pandas.read_csv<\/code>\u51fd\u6570\u7684<code>usecols<\/code>\u53c2\u6570\u6765\u6307\u5b9a\u9700\u8981\u8bfb\u53d6\u7684\u5217\u3002<\/p>\n<\/p>\n<p><p>\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import pandas as pd<\/p>\n<h2><strong>\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u7279\u5b9a\u5217<\/strong><\/h2>\n<p>df = pd.read_csv(&#39;example.csv&#39;, usecols=[&#39;column1&#39;, &#39;column2&#39;])<\/p>\n<h2><strong>\u8f93\u51faDataFrame<\/strong><\/h2>\n<p>print(df)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>usecols<\/code>\u53c2\u6570\u6307\u5b9a\u4e86\u8981\u8bfb\u53d6\u7684\u5217\u540d\uff0c\u53ea\u6709\u8fd9\u4e9b\u5217\u4f1a\u88ab\u8bfb\u53d6\u5230DataFrame\u4e2d\u3002<\/p>\n<\/p>\n<p><h4>4\u3001\u5904\u7406\u7f3a\u5931\u503c<\/h4>\n<\/p>\n<p><p>CSV\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u53ef\u80fd\u5305\u542b\u7f3a\u5931\u503c\u3002\u53ef\u4ee5\u4f7f\u7528pandas\u5e93\u63d0\u4f9b\u7684\u51fd\u6570\u6765\u5904\u7406\u8fd9\u4e9b\u7f3a\u5931\u503c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528<code>fillna<\/code>\u51fd\u6570\u5c06\u7f3a\u5931\u503c\u66ff\u6362\u4e3a\u6307\u5b9a\u7684\u503c\u3002<\/p>\n<\/p>\n<p><p>\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import pandas as pd<\/p>\n<h2><strong>\u8bfb\u53d6CSV\u6587\u4ef6<\/strong><\/h2>\n<p>df = pd.read_csv(&#39;example.csv&#39;)<\/p>\n<h2><strong>\u5c06\u7f3a\u5931\u503c\u66ff\u6362\u4e3a0<\/strong><\/h2>\n<p>df.fillna(0, inplace=True)<\/p>\n<h2><strong>\u8f93\u51faDataFrame<\/strong><\/h2>\n<p>print(df)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>fillna<\/code>\u51fd\u6570\u5c06DataFrame\u4e2d\u7684\u6240\u6709\u7f3a\u5931\u503c\u66ff\u6362\u4e3a0\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u4f7f\u7528numpy\u5e93\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32<\/h3>\n<\/p>\n<p><h4>1\u3001numpy\u5e93\u4ecb\u7ecd<\/h4>\n<\/p>\n<p><p>numpy\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u503c\u8ba1\u7b97\u5e93\uff0c\u63d0\u4f9b\u4e86\u591a\u7ef4\u6570\u7ec4\u5bf9\u8c61\u548c\u4e30\u5bcc\u7684\u6570\u5b66\u51fd\u6570\u3002\u867d\u7136numpy\u4e3b\u8981\u7528\u4e8e\u6570\u503c\u8ba1\u7b97\uff0c\u4f46\u4e5f\u53ef\u4ee5\u7528\u6765\u5904\u7406CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u6570\u636e\u3002<\/p>\n<\/p>\n<p><h4>2\u3001\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32<\/h4>\n<\/p>\n<p><p>\u4f7f\u7528numpy\u5e93\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u9700\u8981\u501f\u52a9<code>numpy.genfromtxt<\/code>\u51fd\u6570\u3002\u8fd9\u4e2a\u51fd\u6570\u53ef\u4ee5\u5c06CSV\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u8bfb\u53d6\u4e3anumpy\u6570\u7ec4\u3002<\/p>\n<\/p>\n<p><p>\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import numpy as np<\/p>\n<h2><strong>\u8bfb\u53d6CSV\u6587\u4ef6<\/strong><\/h2>\n<p>data = np.genfromtxt(&#39;example.csv&#39;, delimiter=&#39;,&#39;, dtype=str)<\/p>\n<h2><strong>\u8f93\u51fanumpy\u6570\u7ec4<\/strong><\/h2>\n<p>print(data)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>example.csv<\/code>\u662f\u8981\u8bfb\u53d6\u7684CSV\u6587\u4ef6\u3002<code>numpy.genfromtxt<\/code>\u51fd\u6570\u5c06\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u8bfb\u53d6\u4e3a\u4e00\u4e2anumpy\u6570\u7ec4\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u603b\u7ed3<\/h3>\n<\/p>\n<p><p><strong>\u4f7f\u7528Python\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u5982\u4f7f\u7528\u5185\u7f6e\u7684csv\u6a21\u5757\u3001pandas\u5e93\u3001numpy\u5e93\u7b49\u3002\u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u4f18\u7f3a\u70b9\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002<\/strong><\/p>\n<\/p>\n<p><p><strong>\u5176\u4e2d\uff0c\u4f7f\u7528pandas\u5e93\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u6700\u4e3a\u4fbf\u6377\u548c\u5f3a\u5927\uff0c\u63a8\u8350\u5728\u5904\u7406\u590d\u6742\u6570\u636e\u65f6\u4f7f\u7528pandas\u5e93\u3002<\/strong><\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u4f7f\u7528Python\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\uff1f<\/strong><br \/>\u8981\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528Python\u7684\u5185\u7f6e<code>csv<\/code>\u6a21\u5757\u6216\u8005<code>pandas<\/code>\u5e93\u3002\u4f7f\u7528<code>csv<\/code>\u6a21\u5757\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528<code>csv.reader()<\/code>\u51fd\u6570\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\uff0c\u83b7\u53d6\u6bcf\u4e00\u884c\u7684\u6570\u636e\u3002\u82e5\u91c7\u7528<code>pandas<\/code>\uff0c\u5219\u53ea\u9700\u8c03\u7528<code>pandas.read_csv()<\/code>\u51fd\u6570\uff0c\u4e4b\u540e\u53ef\u4ee5\u901a\u8fc7\u5217\u540d\u76f4\u63a5\u8bbf\u95ee\u7279\u5b9a\u5b57\u7b26\u4e32\u3002<\/p>\n<p><strong>\u5728\u5904\u7406CSV\u6587\u4ef6\u65f6\uff0c\u5982\u4f55\u63d0\u53d6\u7279\u5b9a\u5217\u7684\u5b57\u7b26\u4e32\u6570\u636e\uff1f<\/strong><br \/>\u82e5\u4f7f\u7528<code>csv<\/code>\u6a21\u5757\uff0c\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u7279\u5b9a\u5217\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c\u82e5\u60f3\u83b7\u53d6\u7b2c\u4e8c\u5217\u7684\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u5728\u8bfb\u53d6\u6bcf\u4e00\u884c\u540e\uff0c\u901a\u8fc7<code>row[1]<\/code>\u8bbf\u95ee\u3002\u82e5\u4f7f\u7528<code>pandas<\/code>\uff0c\u53ea\u9700\u901a\u8fc7\u6570\u636e\u6846\u7684\u5217\u540d\uff0c\u5982<code>df[&#39;column_name&#39;]<\/code>\uff0c\u5373\u53ef\u8f7b\u677e\u63d0\u53d6\u7279\u5b9a\u5217\u7684\u5b57\u7b26\u4e32\u6570\u636e\u3002<\/p>\n<p><strong>\u5982\u4f55\u5904\u7406CSV\u6587\u4ef6\u4e2d\u7684\u7a7a\u5b57\u7b26\u4e32\u6216\u7f3a\u5931\u503c\uff1f<\/strong><br \/>\u5728\u8bfb\u53d6CSV\u6587\u4ef6\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u7a7a\u5b57\u7b26\u4e32\u6216\u7f3a\u5931\u503c\u3002\u4f7f\u7528<code>pandas<\/code>\u65f6\uff0c\u53ef\u4ee5\u5229\u7528<code>dropna()<\/code>\u51fd\u6570\u6e05\u9664\u5305\u542b\u7f3a\u5931\u503c\u7684\u884c\uff0c\u6216\u4f7f\u7528<code>fillna()<\/code>\u51fd\u6570\u586b\u5145\u7f3a\u5931\u503c\u3002\u82e5\u4f7f\u7528<code>csv<\/code>\u6a21\u5757\uff0c\u9700\u5728\u904d\u5386\u884c\u65f6\u68c0\u67e5\u6bcf\u4e2a\u5b57\u6bb5\u662f\u5426\u4e3a\u7a7a\u5e76\u8fdb\u884c\u76f8\u5e94\u5904\u7406\u3002\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u6709\u6548\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u5982\u4f55\u53d6CSV\u4e2d\u7684\u5b57\u7b26\u4e32 \u4f7f\u7528Python\u8bfb\u53d6CSV\u6587\u4ef6\u4e2d\u7684\u5b57\u7b26\u4e32\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u5982\u4f7f\u7528\u5185\u7f6e\u7684csv\u6a21\u5757 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