{"id":953617,"date":"2024-12-27T01:45:36","date_gmt":"2024-12-26T17:45:36","guid":{"rendered":""},"modified":"2024-12-27T01:45:38","modified_gmt":"2024-12-26T17:45:38","slug":"python%e5%a6%82%e4%bd%95%e6%9f%a5%e7%9c%8b%e5%85%83%e7%b4%a0%e4%b8%aa%e6%95%b0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/953617.html","title":{"rendered":"python\u5982\u4f55\u67e5\u770b\u5143\u7d20\u4e2a\u6570"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25094038\/c5db9b2c-2ae0-4a2e-afc4-0d0f9b6f15b7.webp\" alt=\"python\u5982\u4f55\u67e5\u770b\u5143\u7d20\u4e2a\u6570\" \/><\/p>\n<p><p> \u5f00\u5934\u6bb5\u843d:<br \/><strong>\u5728Python\u4e2d\u67e5\u770b\u5143\u7d20\u4e2a\u6570\u7684\u65b9\u6cd5\u4e3b\u8981\u5305\u62ec\u4f7f\u7528<code>len()<\/code>\u51fd\u6570\u3001<code>collections.Counter<\/code>\u7c7b\u3001\u4ee5\u53ca\u901a\u8fc7\u5faa\u73af\u6216\u6761\u4ef6\u5224\u65ad\u6765\u624b\u52a8\u7edf\u8ba1<\/strong>\u3002\u5176\u4e2d\uff0c<code>len()<\/code>\u51fd\u6570\u662f\u6700\u5e38\u7528\u4e14\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u76f4\u63a5\u7528\u4e8e\u6570\u7ec4\u3001\u5217\u8868\u3001\u5143\u7ec4\u3001\u96c6\u5408\u548c\u5b57\u5178\u7b49\u6570\u636e\u7ed3\u6784\u4e2d\uff0c\u4ee5\u8fd4\u56de\u5176\u4e2d\u5143\u7d20\u7684\u6570\u91cf\uff1b<code>collections.Counter<\/code>\u7c7b\u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u4fbf\u7684\u65b9\u5f0f\u6765\u7edf\u8ba1\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u6bcf\u4e2a\u5143\u7d20\u7684\u51fa\u73b0\u6b21\u6570\uff1b\u624b\u52a8\u7edf\u8ba1\u5219\u9002\u7528\u4e8e\u9700\u8981\u81ea\u5b9a\u4e49\u7edf\u8ba1\u89c4\u5219\u7684\u60c5\u51b5\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e9b\u5b9e\u9645\u4f7f\u7528\u4e2d\u7684\u6ce8\u610f\u4e8b\u9879\u3002<\/p>\n<\/p>\n<p><p>\u4e00\u3001LEN()\u51fd\u6570\u7684\u4f7f\u7528<\/p>\n<\/p>\n<p><p><code>len()<\/code>\u51fd\u6570\u662fPython\u4e2d\u7528\u4e8e\u83b7\u53d6\u5bb9\u5668\u4e2d\u5143\u7d20\u4e2a\u6570\u7684\u5185\u5efa\u51fd\u6570\u3002\u5b83\u9002\u7528\u4e8e\u591a\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u5305\u62ec\u5217\u8868\u3001\u5143\u7ec4\u3001\u5b57\u7b26\u4e32\u3001\u96c6\u5408\u548c\u5b57\u5178\u7b49\u3002\u4f7f\u7528<code>len()<\/code>\u51fd\u6570\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u5c06\u9700\u8981\u7edf\u8ba1\u7684\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u5373\u53ef\u3002<\/p>\n<\/p>\n<ol>\n<li>\u5217\u8868\u4e2d\u7684\u5143\u7d20\u4e2a\u6570<\/li>\n<\/ol>\n<p><p>\u5217\u8868\u662f\u4e00\u79cd\u5e38\u7528\u7684\u6570\u636e\u7ed3\u6784\uff0c<code>len()<\/code>\u51fd\u6570\u53ef\u4ee5\u8f7b\u677e\u5730\u83b7\u53d6\u5217\u8868\u4e2d\u7684\u5143\u7d20\u4e2a\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_list = [1, 2, 3, 4, 5]<\/p>\n<p>print(len(my_list))  # \u8f93\u51fa: 5<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5217\u8868<code>my_list<\/code>\u5305\u542b5\u4e2a\u5143\u7d20\uff0c\u56e0\u6b64<code>len(my_list)<\/code>\u8fd4\u56de5\u3002<\/p>\n<\/p>\n<ol start=\"2\">\n<li>\u5b57\u5178\u4e2d\u7684\u5143\u7d20\u4e2a\u6570<\/li>\n<\/ol>\n<p><p>\u5728\u5b57\u5178\u4e2d\uff0c<code>len()<\/code>\u51fd\u6570\u8fd4\u56de\u7684\u662f\u5b57\u5178\u4e2d\u952e-\u503c\u5bf9\u7684\u4e2a\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_dict = {&#39;a&#39;: 1, &#39;b&#39;: 2, &#39;c&#39;: 3}<\/p>\n<p>print(len(my_dict))  # \u8f93\u51fa: 3<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u91cc\uff0c<code>my_dict<\/code>\u5305\u542b3\u4e2a\u952e-\u503c\u5bf9\uff0c\u6240\u4ee5<code>len(my_dict)<\/code>\u8fd4\u56de3\u3002<\/p>\n<\/p>\n<ol start=\"3\">\n<li>\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u4e2a\u6570<\/li>\n<\/ol>\n<p><p>\u5bf9\u4e8e\u5b57\u7b26\u4e32\uff0c<code>len()<\/code>\u51fd\u6570\u8fd4\u56de\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u4e2a\u6570\uff0c\u5305\u62ec\u7a7a\u683c\u548c\u7279\u6b8a\u5b57\u7b26\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_string = &quot;Hello, World!&quot;<\/p>\n<p>print(len(my_string))  # \u8f93\u51fa: 13<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32<code>my_string<\/code>\u4e2d\u670913\u4e2a\u5b57\u7b26\uff0c\u56e0\u6b64<code>len(my_string)<\/code>\u8fd4\u56de13\u3002<\/p>\n<\/p>\n<p><p>\u4e8c\u3001COLLECTIONS.COUNTER\u7684\u4f7f\u7528<\/p>\n<\/p>\n<p><p><code>collections.Counter<\/code>\u662f\u4e00\u4e2a\u4e13\u95e8\u7528\u4e8e\u8ba1\u6570\u7684\u7c7b\uff0c\u5b83\u53ef\u4ee5\u7edf\u8ba1\u53ef\u8fed\u4ee3\u5bf9\u8c61\u4e2d\u6bcf\u4e2a\u5143\u7d20\u7684\u51fa\u73b0\u6b21\u6570\u3002\u8fd9\u5bf9\u4e8e\u9700\u8981\u7edf\u8ba1\u591a\u4e2a\u5143\u7d20\u51fa\u73b0\u9891\u7387\u7684\u60c5\u51b5\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n<ol>\n<li>\u4f7f\u7528Counter\u7edf\u8ba1\u5217\u8868\u4e2d\u5143\u7d20\u7684\u9891\u6b21<\/li>\n<\/ol>\n<p><p>\u53ef\u4ee5\u4f7f\u7528<code>Counter<\/code>\u6765\u7edf\u8ba1\u5217\u8868\u4e2d\u6bcf\u4e2a\u5143\u7d20\u51fa\u73b0\u7684\u6b21\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from collections import Counter<\/p>\n<p>my_list = [&#39;apple&#39;, &#39;banana&#39;, &#39;apple&#39;, &#39;orange&#39;, &#39;banana&#39;, &#39;apple&#39;]<\/p>\n<p>counter = Counter(my_list)<\/p>\n<p>print(counter)  # \u8f93\u51fa: Counter({&#39;apple&#39;: 3, &#39;banana&#39;: 2, &#39;orange&#39;: 1})<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>Counter<\/code>\u7edf\u8ba1\u4e86\u6bcf\u79cd\u6c34\u679c\u5728\u5217\u8868\u4e2d\u51fa\u73b0\u7684\u6b21\u6570\u3002<\/p>\n<\/p>\n<ol start=\"2\">\n<li>Counter\u5728\u5b57\u7b26\u4e32\u4e2d\u7684\u5e94\u7528<\/li>\n<\/ol>\n<p><p><code>Counter<\/code>\u540c\u6837\u53ef\u4ee5\u7528\u4e8e\u5b57\u7b26\u4e32\uff0c\u7edf\u8ba1\u6bcf\u4e2a\u5b57\u7b26\u7684\u51fa\u73b0\u6b21\u6570\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_string = &quot;abracadabra&quot;<\/p>\n<p>counter = Counter(my_string)<\/p>\n<p>print(counter)  # \u8f93\u51fa: Counter({&#39;a&#39;: 5, &#39;b&#39;: 2, &#39;r&#39;: 2, &#39;c&#39;: 1, &#39;d&#39;: 1})<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u91cc\uff0c<code>Counter<\/code>\u7edf\u8ba1\u4e86\u5b57\u7b26\u4e32\u4e2d\u6bcf\u4e2a\u5b57\u7b26\u7684\u51fa\u73b0\u6b21\u6570\u3002<\/p>\n<\/p>\n<p><p>\u4e09\u3001\u624b\u52a8\u7edf\u8ba1\u5143\u7d20\u4e2a\u6570<\/p>\n<\/p>\n<p><p>\u5bf9\u4e8e\u4e00\u4e9b\u7279\u6b8a\u9700\u6c42\uff0c\u53ef\u80fd\u9700\u8981\u624b\u52a8\u7edf\u8ba1\u5143\u7d20\u7684\u4e2a\u6570\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u5faa\u73af\u548c\u6761\u4ef6\u5224\u65ad\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n<ol>\n<li>\u4f7f\u7528\u5faa\u73af\u7edf\u8ba1\u5217\u8868\u4e2d\u5143\u7d20\u4e2a\u6570<\/li>\n<\/ol>\n<p><p>\u5047\u8bbe\u6211\u4eec\u9700\u8981\u7edf\u8ba1\u5217\u8868\u4e2d\u5927\u4e8e2\u7684\u5143\u7d20\u4e2a\u6570\uff0c\u53ef\u4ee5\u901a\u8fc7\u5faa\u73af\u5b9e\u73b0\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_list = [1, 2, 3, 4, 5]<\/p>\n<p>count = 0<\/p>\n<p>for item in my_list:<\/p>\n<p>    if item &gt; 2:<\/p>\n<p>        count += 1<\/p>\n<p>print(count)  # \u8f93\u51fa: 3<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7\u5faa\u73af\u904d\u5386\u5217\u8868\uff0c\u5e76\u7edf\u8ba1\u5927\u4e8e2\u7684\u5143\u7d20\u4e2a\u6570\u3002<\/p>\n<\/p>\n<ol start=\"2\">\n<li>\u81ea\u5b9a\u4e49\u7edf\u8ba1\u89c4\u5219<\/li>\n<\/ol>\n<p><p>\u6709\u65f6\u5019\uff0c\u6211\u4eec\u9700\u8981\u57fa\u4e8e\u81ea\u5b9a\u4e49\u7684\u89c4\u5219\u6765\u7edf\u8ba1\u5143\u7d20\u4e2a\u6570\u3002\u901a\u8fc7\u624b\u52a8\u5b9e\u73b0\u7edf\u8ba1\u903b\u8f91\uff0c\u53ef\u4ee5\u7075\u6d3b\u5730\u6ee1\u8db3\u5404\u79cd\u9700\u6c42\u3002\u4f8b\u5982\uff0c\u7edf\u8ba1\u5b57\u7b26\u4e32\u4e2d\u5143\u97f3\u5b57\u6bcd\u7684\u4e2a\u6570\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_string = &quot;Hello, World!&quot;<\/p>\n<p>vowels = &quot;aeiouAEIOU&quot;<\/p>\n<p>count = 0<\/p>\n<p>for char in my_string:<\/p>\n<p>    if char in vowels:<\/p>\n<p>        count += 1<\/p>\n<p>print(count)  # \u8f93\u51fa: 3<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u6b64\u4f8b\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7\u5224\u65ad\u5b57\u7b26\u662f\u5426\u4e3a\u5143\u97f3\u5b57\u6bcd\u6765\u7edf\u8ba1\u5143\u97f3\u5b57\u6bcd\u7684\u4e2a\u6570\u3002<\/p>\n<\/p>\n<p><p>\u56db\u3001\u5e94\u7528\u573a\u666f\u548c\u4f18\u5316\u5efa\u8bae<\/p>\n<\/p>\n<p><p>\u4e0d\u540c\u7684\u65b9\u6cd5\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u3002<code>len()<\/code>\u51fd\u6570\u7b80\u5355\u5feb\u901f\uff0c\u9002\u5408\u7528\u4e8e\u57fa\u672c\u7684\u5143\u7d20\u4e2a\u6570\u7edf\u8ba1\uff1b<code>collections.Counter<\/code>\u7c7b\u63d0\u4f9b\u4e86\u66f4\u4e30\u5bcc\u7684\u7edf\u8ba1\u529f\u80fd\uff0c\u9002\u7528\u4e8e\u9700\u8981\u9891\u6b21\u7edf\u8ba1\u7684\u573a\u5408\uff1b\u624b\u52a8\u7edf\u8ba1\u5219\u9002\u5408\u4e8e\u590d\u6742\u7684\u81ea\u5b9a\u4e49\u9700\u6c42\u3002<\/p>\n<\/p>\n<ol>\n<li>\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5<\/li>\n<\/ol>\n<p><p>\u5728\u9009\u62e9\u7edf\u8ba1\u65b9\u6cd5\u65f6\uff0c\u5e94\u6839\u636e\u9700\u6c42\u548c\u6570\u636e\u7ed3\u6784\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u7b80\u5355\u7684\u5143\u7d20\u4e2a\u6570\u7edf\u8ba1\uff0c<code>len()<\/code>\u51fd\u6570\u662f\u6700\u4f73\u9009\u62e9\uff1b\u800c\u5bf9\u4e8e\u9700\u8981\u7edf\u8ba1\u9891\u6b21\u7684\u60c5\u51b5\uff0c<code>Counter<\/code>\u4f1a\u66f4\u4e3a\u9ad8\u6548\u3002<\/p>\n<\/p>\n<ol start=\"2\">\n<li>\u6027\u80fd\u4f18\u5316<\/li>\n<\/ol>\n<p><p>\u5728\u5904\u7406\u5927\u6570\u636e\u65f6\uff0c\u6027\u80fd\u53ef\u80fd\u6210\u4e3a\u4e00\u4e2a\u95ee\u9898\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u4f18\u5316\u6027\u80fd\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u4f7f\u7528\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u6216\u8fed\u4ee3\u5668\u6765\u51cf\u5c11\u5185\u5b58\u6d88\u8017\u3002<\/li>\n<li>\u5bf9\u4e8e\u590d\u6742\u7684\u7edf\u8ba1\u9700\u6c42\uff0c\u8003\u8651\u4f7f\u7528\u5e76\u884c\u8ba1\u7b97\u5e93\u5982<code>multiprocessing<\/code>\u3002<\/li>\n<\/ul>\n<ol start=\"3\">\n<li>\u907f\u514d\u91cd\u590d\u8ba1\u7b97<\/li>\n<\/ol>\n<p><p>\u5728\u4e00\u4e9b\u573a\u5408\uff0c\u6211\u4eec\u53ef\u80fd\u4f1a\u591a\u6b21\u7edf\u8ba1\u76f8\u540c\u7684\u6570\u636e\u3002\u4e3a\u4e86\u907f\u514d\u91cd\u590d\u8ba1\u7b97\uff0c\u53ef\u4ee5\u5c06\u7edf\u8ba1\u7ed3\u679c\u7f13\u5b58\u8d77\u6765\uff0c\u4ee5\u63d0\u9ad8\u6548\u7387\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c06<code>Counter<\/code>\u7684\u7ed3\u679c\u5b58\u50a8\u5728\u5b57\u5178\u4e2d\uff0c\u4f9b\u540e\u7eed\u4f7f\u7528\u3002<\/p>\n<\/p>\n<p><p>\u4e94\u3001\u603b\u7ed3<\/p>\n<\/p>\n<p><p>Python\u63d0\u4f9b\u4e86\u591a\u79cd\u7edf\u8ba1\u5143\u7d20\u4e2a\u6570\u7684\u65b9\u6cd5\uff0c\u5305\u62ec<code>len()<\/code>\u51fd\u6570\u3001<code>collections.Counter<\/code>\u7c7b\u548c\u624b\u52a8\u7edf\u8ba1\u3002\u6bcf\u79cd\u65b9\u6cd5\u6709\u5176\u9002\u7528\u7684\u573a\u666f\u548c\u4f18\u7f3a\u70b9\u3002\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u5e94\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u4ee5\u5b9e\u73b0\u9ad8\u6548\u548c\u51c6\u786e\u7684\u7edf\u8ba1\u3002\u5728\u5927\u89c4\u6a21\u6570\u636e\u5904\u7406\u548c\u590d\u6742\u81ea\u5b9a\u4e49\u7edf\u8ba1\u9700\u6c42\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u7ed3\u5408\u591a\u79cd\u65b9\u6cd5\u548c\u6280\u672f\uff0c\u4ee5\u8fbe\u5230\u6700\u4f73\u6548\u679c\u3002\u901a\u8fc7\u5408\u7406\u9009\u62e9\u548c\u5e94\u7528\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728Python\u7f16\u7a0b\u4e2d\u66f4\u597d\u5730\u5b9e\u73b0\u6570\u636e\u7edf\u8ba1\u548c\u5904\u7406\u4efb\u52a1\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u8ba1\u7b97\u5217\u8868\u6216\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u6570\u91cf\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684<code>len()<\/code>\u51fd\u6570\u6765\u8ba1\u7b97\u5217\u8868\u3001\u96c6\u5408\u6216\u4efb\u4f55\u5176\u4ed6\u5bb9\u5668\u7c7b\u578b\u4e2d\u7684\u5143\u7d20\u6570\u91cf\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u5217\u8868<code>my_list = [1, 2, 3, 4, 5]<\/code>\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528<code>len(my_list)<\/code>\u6765\u83b7\u53d6\u5176\u5305\u542b\u7684\u5143\u7d20\u4e2a\u6570\uff0c\u8fd4\u56de\u503c\u4e3a5\u3002<\/p>\n<p><strong>\u6709\u6ca1\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u67e5\u770b\u5b57\u5178\u4e2d\u952e\u7684\u6570\u91cf\uff1f<\/strong><br \/>\u5bf9\u4e8e\u5b57\u5178\uff0c\u60a8\u540c\u6837\u53ef\u4ee5\u4f7f\u7528<code>len()<\/code>\u51fd\u6570\u6765\u83b7\u53d6\u952e\u7684\u6570\u91cf\u3002\u4f8b\u5982\uff0c\u4f7f\u7528<code>my_dict = {&#39;a&#39;: 1, &#39;b&#39;: 2, &#39;c&#39;: 3}<\/code>\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7<code>len(my_dict)<\/code>\u6765\u83b7\u53d6\u5b57\u5178\u4e2d\u952e\u7684\u6570\u91cf\uff0c\u8fd4\u56de\u7ed3\u679c\u4e3a3\u3002\u6b64\u5916\uff0c\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528<code>my_dict.keys()<\/code>\u7ed3\u5408<code>len()<\/code>\u6765\u67e5\u770b\u952e\u7684\u6570\u91cf\u3002<\/p>\n<p><strong>\u5982\u4f55\u5728Pandas\u4e2d\u7edf\u8ba1\u6570\u636e\u6846\u7684\u884c\u6570\uff1f<\/strong><br \/>\u5982\u679c\u60a8\u4f7f\u7528\u7684\u662fPandas\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528<code>DataFrame.shape<\/code>\u5c5e\u6027\u6765\u83b7\u53d6\u884c\u548c\u5217\u7684\u6570\u91cf\u3002\u4f8b\u5982\uff0c\u82e5\u6709\u4e00\u4e2a\u6570\u636e\u6846<code>df<\/code>\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7<code>df.shape[0]<\/code>\u6765\u83b7\u53d6\u884c\u6570\uff0c\u8fd4\u56de\u7ed3\u679c\u5c06\u662f\u6570\u636e\u6846\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u9002\u5408\u7528\u4e8e\u6570\u636e\u5206\u6790\u4efb\u52a1\u4e2d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5f00\u5934\u6bb5\u843d:\u5728Python\u4e2d\u67e5\u770b\u5143\u7d20\u4e2a\u6570\u7684\u65b9\u6cd5\u4e3b\u8981\u5305\u62ec\u4f7f\u7528len()\u51fd\u6570\u3001collections.Counter [&hellip;]","protected":false},"author":3,"featured_media":953623,"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\/953617"}],"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=953617"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/953617\/revisions"}],"predecessor-version":[{"id":953624,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/953617\/revisions\/953624"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/953623"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=953617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=953617"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=953617"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}