{"id":971663,"date":"2024-12-27T05:37:03","date_gmt":"2024-12-26T21:37:03","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/971663.html"},"modified":"2024-12-27T05:37:05","modified_gmt":"2024-12-26T21:37:05","slug":"python%e5%a6%82%e4%bd%95%e8%af%bb%e5%8f%96%e6%8c%87%e5%ae%9a%e8%a1%8c%e6%95%b0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/971663.html","title":{"rendered":"python\u5982\u4f55\u8bfb\u53d6\u6307\u5b9a\u884c\u6570"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24194651\/26439a60-0846-4099-86a7-082bd6aa8dea.webp\" alt=\"python\u5982\u4f55\u8bfb\u53d6\u6307\u5b9a\u884c\u6570\" \/><\/p>\n<p><p> <strong>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u6cd5\u6765\u8bfb\u53d6\u6307\u5b9a\u884c\u6570\u7684\u5185\u5bb9<\/strong>\uff0c<strong>\u5982\u4f7f\u7528\u6587\u4ef6\u5bf9\u8c61\u7684readlines()\u65b9\u6cd5\u3001itertools\u6a21\u5757\u3001pandas\u5e93\u7b49<\/strong>\u3002<strong>\u5176\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u6587\u4ef6\u5bf9\u8c61\u7684readlines()\u65b9\u6cd5<\/strong>\uff0c\u56e0\u4e3a\u5b83\u7b80\u5355\u6613\u7528\u4e14\u6027\u80fd\u8f83\u597d\u3002\u4ee5\u4e0b\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u51e0\u79cd\u65b9\u6cd5\u53ca\u5176\u4f18\u7f3a\u70b9\u3002<\/p>\n<\/p>\n<p><p>\u4e00\u3001\u4f7f\u7528\u6587\u4ef6\u5bf9\u8c61\u7684readlines()\u65b9\u6cd5<\/p>\n<\/p>\n<p><p>\u5728Python\u4e2d\uff0c\u6587\u4ef6\u5bf9\u8c61\u7684readlines()\u65b9\u6cd5\u53ef\u4ee5\u4e00\u6b21\u6027\u8bfb\u53d6\u6587\u4ef6\u4e2d\u7684\u6240\u6709\u884c\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5217\u8868\uff0c\u5176\u4e2d\u6bcf\u4e00\u884c\u4f5c\u4e3a\u5217\u8868\u4e2d\u7684\u4e00\u4e2a\u5143\u7d20\u3002\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u5c0f\u6587\u4ef6\uff0c\u8bfb\u53d6\u901f\u5ea6\u5feb\u4e14\u6613\u4e8e\u5b9e\u73b0\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def read_specific_lines(file_path, start, end):<\/p>\n<p>    with open(file_path, &#39;r&#39;) as file:<\/p>\n<p>        lines = file.readlines()<\/p>\n<p>        return lines[start-1:end]<\/p>\n<h2><strong>\u793a\u4f8b\uff1a\u8bfb\u53d6\u6587\u4ef6example.txt\u7684\u7b2c2\u5230\u7b2c4\u884c<\/strong><\/h2>\n<p>lines = read_specific_lines(&#39;example.txt&#39;, 2, 4)<\/p>\n<p>for line in lines:<\/p>\n<p>    print(line, end=&#39;&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u4f18\u70b9\uff1a<\/strong> \u7b80\u5355\u6613\u7528\uff0c\u9002\u5408\u5c0f\u6587\u4ef6\u3002<\/p>\n<\/p>\n<p><p><strong>\u7f3a\u70b9\uff1a<\/strong> \u5f53\u6587\u4ef6\u8f83\u5927\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u5360\u7528\u8fc7\u9ad8\u3002<\/p>\n<\/p>\n<p><p>\u4e8c\u3001\u4f7f\u7528\u8fed\u4ee3\u5668\u548citertools\u6a21\u5757<\/p>\n<\/p>\n<p><p>\u5bf9\u4e8e\u5927\u6587\u4ef6\uff0c\u4f7f\u7528\u8fed\u4ee3\u5668\u53ef\u4ee5\u907f\u514d\u4e00\u6b21\u6027\u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\uff0c\u4ece\u800c\u964d\u4f4e\u5185\u5b58\u4f7f\u7528\u3002itertools\u6a21\u5757\u63d0\u4f9b\u4e86islice()\u51fd\u6570\uff0c\u53ef\u4ee5\u7528\u4e8e\u9ad8\u6548\u5730\u8bfb\u53d6\u6307\u5b9a\u884c\u6570\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from itertools import islice<\/p>\n<p>def read_specific_lines(file_path, start, end):<\/p>\n<p>    with open(file_path, &#39;r&#39;) as file:<\/p>\n<p>        lines = islice(file, start-1, end)<\/p>\n<p>        return list(lines)<\/p>\n<h2><strong>\u793a\u4f8b\uff1a\u8bfb\u53d6\u6587\u4ef6example.txt\u7684\u7b2c2\u5230\u7b2c4\u884c<\/strong><\/h2>\n<p>lines = read_specific_lines(&#39;example.txt&#39;, 2, 4)<\/p>\n<p>for line in lines:<\/p>\n<p>    print(line, end=&#39;&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u4f18\u70b9\uff1a<\/strong> \u9002\u5408\u5904\u7406\u5927\u6587\u4ef6\uff0c\u5185\u5b58\u5360\u7528\u4f4e\u3002<\/p>\n<\/p>\n<p><p><strong>\u7f3a\u70b9\uff1a<\/strong> \u76f8\u5bf9\u590d\u6742\uff0c\u9700\u8981\u5f15\u5165\u989d\u5916\u7684\u6a21\u5757\u3002<\/p>\n<\/p>\n<p><p>\u4e09\u3001\u4f7f\u7528pandas\u5e93<\/p>\n<\/p>\n<p><p>pandas\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u636e\u5206\u6790\u5e93\uff0c\u9002\u7528\u4e8e\u7ed3\u6784\u5316\u6570\u636e\u5904\u7406\u3002\u867d\u7136pandas\u901a\u5e38\u7528\u4e8e\u6570\u636e\u5206\u6790\uff0c\u4f46\u4e5f\u53ef\u4ee5\u7528\u6765\u9ad8\u6548\u5730\u8bfb\u53d6\u6587\u4ef6\u4e2d\u7684\u6307\u5b9a\u884c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import pandas as pd<\/p>\n<p>def read_specific_lines(file_path, start, end):<\/p>\n<p>    df = pd.read_csv(file_path, header=None, skiprows=start-1, nrows=end-start+1)<\/p>\n<p>    return df.values.tolist()<\/p>\n<h2><strong>\u793a\u4f8b\uff1a\u8bfb\u53d6\u6587\u4ef6example.txt\u7684\u7b2c2\u5230\u7b2c4\u884c<\/strong><\/h2>\n<p>lines = read_specific_lines(&#39;example.txt&#39;, 2, 4)<\/p>\n<p>for line in lines:<\/p>\n<p>    print(line)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u4f18\u70b9\uff1a<\/strong> \u529f\u80fd\u5f3a\u5927\uff0c\u53ef\u4ee5\u76f4\u63a5\u5904\u7406\u5404\u79cd\u6570\u636e\u683c\u5f0f\u3002<\/p>\n<\/p>\n<p><p><strong>\u7f3a\u70b9\uff1a<\/strong> \u9700\u8981\u5b89\u88c5pandas\u5e93\uff0c\u9002\u5408\u5904\u7406\u7ed3\u6784\u5316\u6570\u636e\u3002<\/p>\n<\/p>\n<p><p>\u56db\u3001\u9010\u884c\u8bfb\u53d6\u5e76\u8ba1\u6570<\/p>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u5bf9\u5185\u5b58\u8981\u6c42\u8f83\u9ad8\u7684\u73af\u5883\u3002\u5728\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f7f\u7528\u8ba1\u6570\u5668\u6765\u5224\u65ad\u662f\u5426\u9700\u8981\u8bfb\u53d6\u5f53\u524d\u884c\u3002\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u5730\u964d\u4f4e\u5185\u5b58\u4f7f\u7528\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def read_specific_lines(file_path, start, end):<\/p>\n<p>    lines = []<\/p>\n<p>    with open(file_path, &#39;r&#39;) as file:<\/p>\n<p>        for current_line_num, line in enumerate(file, start=1):<\/p>\n<p>            if start &lt;= current_line_num &lt;= end:<\/p>\n<p>                lines.append(line)<\/p>\n<p>            elif current_line_num &gt; end:<\/p>\n<p>                break<\/p>\n<p>    return lines<\/p>\n<h2><strong>\u793a\u4f8b\uff1a\u8bfb\u53d6\u6587\u4ef6example.txt\u7684\u7b2c2\u5230\u7b2c4\u884c<\/strong><\/h2>\n<p>lines = read_specific_lines(&#39;example.txt&#39;, 2, 4)<\/p>\n<p>for line in lines:<\/p>\n<p>    print(line, end=&#39;&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u4f18\u70b9\uff1a<\/strong> \u5185\u5b58\u4f7f\u7528\u6548\u7387\u9ad8\uff0c\u9002\u5408\u5904\u7406\u5927\u6587\u4ef6\u3002<\/p>\n<\/p>\n<p><p><strong>\u7f3a\u70b9\uff1a<\/strong> \u4ee3\u7801\u76f8\u5bf9\u590d\u6742\u3002<\/p>\n<\/p>\n<p><p>\u4e94\u3001\u7efc\u5408\u6bd4\u8f83\u4e0e\u9009\u62e9<\/p>\n<\/p>\n<p><p>\u5728\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u65f6\uff0c\u5e94\u6839\u636e\u5177\u4f53\u60c5\u51b5\u8fdb\u884c\u8bc4\u4f30\uff1a<\/p>\n<\/p>\n<ol>\n<li>\n<p><strong>\u6587\u4ef6\u5927\u5c0f<\/strong>\uff1a\u5bf9\u4e8e\u5c0f\u6587\u4ef6\uff0creadlines()\u65b9\u6cd5\u662f\u6700\u7b80\u5355\u7684\u9009\u62e9\u3002\u800c\u5bf9\u4e8e\u5927\u6587\u4ef6\uff0c\u4f7f\u7528\u8fed\u4ee3\u5668\u6216\u9010\u884c\u8bfb\u53d6\u7684\u65b9\u6cd5\u66f4\u4e3a\u5408\u9002\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u4ee3\u7801\u590d\u6742\u5ea6<\/strong>\uff1a\u5982\u679c\u8ffd\u6c42\u4ee3\u7801\u7b80\u6d01\uff0creadlines()\u65b9\u6cd5\u548cpandas\u5e93\u5747\u4e3a\u4e0d\u9519\u7684\u9009\u62e9\u3002pandas\u5e93\u867d\u7136\u9700\u8981\u989d\u5916\u5b89\u88c5\uff0c\u4f46\u5176\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u80fd\u529b\u4f7f\u5176\u6210\u4e3a\u8bb8\u591a\u6570\u636e\u5206\u6790\u4efb\u52a1\u4e2d\u7684\u9996\u9009\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u5185\u5b58\u4f7f\u7528<\/strong>\uff1a\u5982\u679c\u5185\u5b58\u662f\u4e3b\u8981\u7684\u8003\u8651\u56e0\u7d20\uff0c\u4f7f\u7528\u8fed\u4ee3\u5668\u6216\u9010\u884c\u8bfb\u53d6\u7684\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u51cf\u5c11\u5185\u5b58\u5360\u7528\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n<p><p>\u7efc\u4e0a\u6240\u8ff0\uff0cPython\u63d0\u4f9b\u4e86\u591a\u79cd\u8bfb\u53d6\u6587\u4ef6\u4e2d\u6307\u5b9a\u884c\u6570\u7684\u65b9\u6cd5\uff0c\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u9002\u7528\u7684\u573a\u666f\u548c\u4f18\u7f3a\u70b9\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5e94\u6839\u636e\u6587\u4ef6\u5927\u5c0f\u3001\u4ee3\u7801\u590d\u6742\u5ea6\u548c\u5185\u5b58\u4f7f\u7528\u7b49\u56e0\u7d20\uff0c\u9009\u62e9\u6700\u5408\u9002\u7684\u65b9\u6cd5\u6765\u8bfb\u53d6\u6307\u5b9a\u884c\u6570\u7684\u5185\u5bb9\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u4f7f\u7528Python\u8bfb\u53d6\u6587\u672c\u6587\u4ef6\u7684\u7279\u5b9a\u884c\u6570\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u8bfb\u53d6\u6587\u4ef6\u7684\u7279\u5b9a\u884c\u6570\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u6cd5\u5b9e\u73b0\u3002\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u6587\u4ef6\u5bf9\u8c61\u7684<code>readlines()<\/code>\u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u5c06\u6587\u4ef6\u4e2d\u7684\u6240\u6709\u884c\u8bfb\u5165\u4e00\u4e2a\u5217\u8868\u4e2d\u3002\u4e4b\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u6765\u8bbf\u95ee\u7279\u5b9a\u7684\u884c\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n<pre><code class=\"language-python\">with open(&#39;filename.txt&#39;, &#39;r&#39;) as file:\n    lines = file.readlines()\n    specific_lines = lines[start:end]  # start\u548cend\u4e3a\u4f60\u60f3\u8bfb\u53d6\u7684\u884c\u6570\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u6613\u61c2\uff0c\u9002\u5408\u5904\u7406\u8f83\u5c0f\u7684\u6587\u4ef6\u3002<\/p>\n<p><strong>\u5728\u5904\u7406\u5927\u6587\u4ef6\u65f6\uff0c\u5982\u4f55\u6709\u6548\u8bfb\u53d6\u7279\u5b9a\u884c\u6570\uff1f<\/strong><br \/>\u5bf9\u4e8e\u5927\u578b\u6587\u4ef6\uff0c\u4f7f\u7528<code>readlines()<\/code>\u53ef\u80fd\u4f1a\u5360\u7528\u8fc7\u591a\u5185\u5b58\u3002\u8fd9\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528<code>enumerate<\/code>\u51fd\u6570\u7ed3\u5408<code>for<\/code>\u5faa\u73af\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\uff0c\u76f4\u5230\u8fbe\u5230\u6240\u9700\u7684\u884c\u6570\u3002\u4f8b\u5982\uff1a  <\/p>\n<pre><code class=\"language-python\">with open(&#39;filename.txt&#39;, &#39;r&#39;) as file:\n    for current_line_number, line in enumerate(file):\n        if current_line_number &gt;= start and current_line_number &lt; end:\n            print(line.strip())\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u907f\u514d\u4e86\u4e00\u6b21\u6027\u8bfb\u53d6\u6574\u4e2a\u6587\u4ef6\uff0c\u9002\u5408\u5904\u7406\u5927\u6587\u4ef6\u3002<\/p>\n<p><strong>\u662f\u5426\u53ef\u4ee5\u4f7f\u7528Pandas\u8bfb\u53d6\u7279\u5b9a\u884c\u6570\uff1f<\/strong><br \/>\u5982\u679c\u6570\u636e\u6587\u4ef6\u662fCSV\u683c\u5f0f\uff0c\u53ef\u4ee5\u4f7f\u7528Pandas\u5e93\u4e2d\u7684<code>read_csv<\/code>\u51fd\u6570\u6765\u8bfb\u53d6\u6307\u5b9a\u884c\u6570\u3002\u901a\u8fc7<code>skiprows<\/code>\u53c2\u6570\uff0c\u53ef\u4ee5\u8df3\u8fc7\u524d\u9762\u7684\u884c\uff0c\u800c\u901a\u8fc7<code>nrows<\/code>\u53c2\u6570\u6765\u9650\u5236\u8bfb\u53d6\u7684\u884c\u6570\u3002\u4f8b\u5982\uff1a  <\/p>\n<pre><code class=\"language-python\">import pandas as pd\n\ndf = pd.read_csv(&#39;filename.csv&#39;, skiprows=start, nrows=num_of_rows)\n<\/code><\/pre>\n<p>\u4f7f\u7528Pandas\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c\u6570\u636e\u5206\u6790\uff0c\u9002\u5408\u5904\u7406\u8868\u683c\u6570\u636e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u6cd5\u6765\u8bfb\u53d6\u6307\u5b9a\u884c\u6570\u7684\u5185\u5bb9\uff0c\u5982\u4f7f\u7528\u6587\u4ef6\u5bf9\u8c61\u7684readlines()\u65b9\u6cd5\u3001itert [&hellip;]","protected":false},"author":3,"featured_media":971668,"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\/971663"}],"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=971663"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/971663\/revisions"}],"predecessor-version":[{"id":971669,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/971663\/revisions\/971669"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/971668"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=971663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=971663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=971663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}