{"id":949708,"date":"2024-12-27T00:15:24","date_gmt":"2024-12-26T16:15:24","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/949708.html"},"modified":"2024-12-27T00:15:26","modified_gmt":"2024-12-26T16:15:26","slug":"python%e5%a6%82%e4%bd%95%e6%b1%82%e5%bc%80%e6%96%b9","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/949708.html","title":{"rendered":"python\u5982\u4f55\u6c42\u5f00\u65b9"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25084600\/6b21f77d-a67f-43e6-9292-21652965a462.webp\" alt=\"python\u5982\u4f55\u6c42\u5f00\u65b9\" \/><\/p>\n<p><p> \u5f00\u5934\u6bb5\u843d:<br \/><strong>\u5728Python\u4e2d\u6c42\u5f00\u65b9\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff1a\u4f7f\u7528\u5e42\u8fd0\u7b97\u7b26\u3001math\u5e93\u7684sqrt\u51fd\u6570\u3001cmath\u5e93\u7684sqrt\u51fd\u6570\uff08\u7528\u4e8e\u5904\u7406\u590d\u6570\uff09<\/strong>\u3002\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528math\u5e93\u4e2d\u7684sqrt\u51fd\u6570\uff0c\u56e0\u4e3a\u5b83\u7b80\u5355\u4e14\u6548\u7387\u9ad8\u3002\u901a\u8fc7\u8c03\u7528math.sqrt()\u51fd\u6570\uff0c\u53ef\u4ee5\u5bf9\u4e00\u4e2a\u975e\u8d1f\u6570\u8fdb\u884c\u5f00\u65b9\u8fd0\u7b97\uff0c\u5e76\u8fd4\u56de\u8be5\u6570\u7684\u5e73\u65b9\u6839\u3002\u5bf9\u4e8e\u9700\u8981\u8ba1\u7b97\u590d\u6570\u5e73\u65b9\u6839\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u4f7f\u7528cmath\u5e93\u7684sqrt\u51fd\u6570\u3002\u6b64\u5916\uff0cPython\u7684\u5e42\u8fd0\u7b97\u7b26\uff08\uff09\u4e5f\u53ef\u4ee5\u7528\u4e8e\u6c42\u5f00\u65b9\uff0c\u901a\u8fc7\u5c06\u6307\u6570\u8bbe\u4e3a0.5\u6765\u8ba1\u7b97\u5e73\u65b9\u6839\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\u7684\u5177\u4f53\u4f7f\u7528\u65b9\u5f0f\u53ca\u5176\u9002\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n<p><p>\u6b63\u6587\uff1a<\/p>\n<\/p>\n<p><p>\u4e00\u3001\u4f7f\u7528MATH\u5e93\u7684SQRT\u51fd\u6570<\/p>\n<\/p>\n<p><p>Math\u5e93\u662fPython\u4e2d\u4e00\u4e2a\u975e\u5e38\u5e38\u7528\u7684\u6570\u5b66\u5e93\uff0c\u63d0\u4f9b\u4e86\u8bb8\u591a\u57fa\u7840\u7684\u6570\u5b66\u51fd\u6570\uff0c\u5176\u4e2dsqrt\u51fd\u6570\u662f\u4e13\u95e8\u7528\u4e8e\u8ba1\u7b97\u5e73\u65b9\u6839\u7684\u3002<\/p>\n<\/p>\n<ol>\n<li>\n<p><strong>\u57fa\u672c\u7528\u6cd5<\/strong><br \/>\u4f7f\u7528math.sqrt()\u51fd\u6570\u6765\u8ba1\u7b97\u4e00\u4e2a\u975e\u8d1f\u6570\u7684\u5e73\u65b9\u6839\u975e\u5e38\u7b80\u5355\u3002\u9996\u5148\u9700\u8981\u5bfc\u5165math\u5e93\uff0c\u7136\u540e\u76f4\u63a5\u8c03\u7528sqrt\u51fd\u6570\u5373\u53ef\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import math<\/p>\n<p>number = 16<\/p>\n<p>result = math.sqrt(number)<\/p>\n<p>print(&quot;The square root of&quot;, number, &quot;is&quot;, result)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u8ba1\u7b97\u4e8616\u7684\u5e73\u65b9\u6839\u5e76\u8f93\u51fa\u7ed3\u679c\u4e3a4.0\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u6ce8\u610f\u4e8b\u9879<\/strong><br \/>\u4f7f\u7528math.sqrt()\u51fd\u6570\u65f6\u8981\u6ce8\u610f\uff0c\u8f93\u5165\u53c2\u6570\u5fc5\u987b\u662f\u975e\u8d1f\u6570\u3002\u5982\u679c\u8f93\u5165\u8d1f\u6570\uff0c\u4f1a\u629b\u51faValueError\u5f02\u5e38\u3002\u56e0\u6b64\uff0c\u5728\u4f7f\u7528\u4e4b\u524d\uff0c\u53ef\u4ee5\u4f7f\u7528\u6761\u4ef6\u5224\u65ad\u6765\u786e\u4fdd\u8f93\u5165\u7684\u5408\u6cd5\u6027\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import math<\/p>\n<p>number = -16<\/p>\n<p>if number &gt;= 0:<\/p>\n<p>    result = math.sqrt(number)<\/p>\n<p>    print(&quot;The square root of&quot;, number, &quot;is&quot;, result)<\/p>\n<p>else:<\/p>\n<p>    print(&quot;Cannot calculate the square root of a negative number.&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<\/li>\n<\/ol>\n<p><p>\u4e8c\u3001\u4f7f\u7528\u5e42\u8fd0\u7b97\u7b26\uff08\uff09<\/p>\n<\/p>\n<p><p>Python\u4e2d\u5e42\u8fd0\u7b97\u7b26\uff08\uff09\u4e5f\u53ef\u4ee5\u7528\u6765\u8ba1\u7b97\u5e73\u65b9\u6839\uff0c\u53ea\u9700\u5c06\u6307\u6570\u8bbe\u4e3a0.5\u5373\u53ef\u3002\u4e0emath.sqrt()\u76f8\u6bd4\uff0c\u8fd9\u79cd\u65b9\u6cd5\u66f4\u52a0\u7b80\u6d01\u3002<\/p>\n<\/p>\n<ol>\n<li>\n<p><strong>\u57fa\u672c\u7528\u6cd5<\/strong><br \/>\u5e42\u8fd0\u7b97\u7b26\u7684\u4f7f\u7528\u975e\u5e38\u7b80\u5355\uff0c\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">number = 25<\/p>\n<p>result = number  0.5<\/p>\n<p>print(&quot;The square root of&quot;, number, &quot;is&quot;, result)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u8ba1\u7b97\u4e8625\u7684\u5e73\u65b9\u6839\uff0c\u7ed3\u679c\u4e3a5.0\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u9002\u7528\u573a\u666f<\/strong><br \/>\u4f7f\u7528\u5e42\u8fd0\u7b97\u7b26\u7684\u65b9\u6cd5\u975e\u5e38\u76f4\u89c2\uff0c\u9002\u5408\u4e0d\u9700\u8981\u7279\u522b\u5904\u7406\u8d1f\u6570\u7684\u7b80\u5355\u573a\u666f\u3002\u7136\u800c\uff0c\u7531\u4e8e\u5e42\u8fd0\u7b97\u7b26\u4e0d\u68c0\u67e5\u8d1f\u6570\u7684\u60c5\u51b5\uff0c\u53ef\u80fd\u4f1a\u5728\u4e0d\u614e\u8f93\u5165\u8d1f\u6570\u65f6\u5f97\u5230\u590d\u6570\u7ed3\u679c\u3002\u56e0\u6b64\uff0c\u8981\u786e\u4fdd\u8f93\u5165\u7684\u6570\u4e3a\u975e\u8d1f\uff0c\u6216\u8005\u660e\u786e\u77e5\u9053\u7ed3\u679c\u5c06\u5982\u4f55\u5904\u7406\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n<p><p>\u4e09\u3001\u4f7f\u7528CMATH\u5e93\u7684SQRT\u51fd\u6570<\/p>\n<\/p>\n<p><p>\u5bf9\u4e8e\u9700\u8981\u8ba1\u7b97\u590d\u6570\u7684\u5e73\u65b9\u6839\uff0ccmath\u5e93\u63d0\u4f9b\u4e86sqrt\u51fd\u6570\u3002cmath\u662fPython\u7684\u590d\u6570\u6570\u5b66\u5e93\uff0c\u4e13\u95e8\u7528\u4e8e\u5904\u7406\u6d89\u53ca\u590d\u6570\u7684\u6570\u5b66\u8fd0\u7b97\u3002<\/p>\n<\/p>\n<ol>\n<li>\n<p><strong>\u57fa\u672c\u7528\u6cd5<\/strong><br \/>\u8981\u4f7f\u7528cmath.sqrt()\uff0c\u9700\u8981\u5bfc\u5165cmath\u5e93\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import cmath<\/p>\n<p>number = -25<\/p>\n<p>result = cmath.sqrt(number)<\/p>\n<p>print(&quot;The square root of&quot;, number, &quot;is&quot;, result)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u8ba1\u7b97\u4e86-25\u7684\u5e73\u65b9\u6839\uff0c\u7ed3\u679c\u4e3a5j\uff08\u590d\u6570\u8868\u793a\uff09\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u9002\u7528\u573a\u666f<\/strong><br \/>cmath.sqrt()\u9002\u7528\u4e8e\u6240\u6709\u6570\uff0c\u5305\u62ec\u8d1f\u6570\u548c\u590d\u6570\u3002\u5bf9\u4e8e\u4efb\u4f55\u53ef\u80fd\u4ea7\u751f\u590d\u6570\u7ed3\u679c\u7684\u8fd0\u7b97\uff0c\u4f7f\u7528cmath\u5e93\u66f4\u52a0\u5b89\u5168\u548c\u5408\u9002\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n<p><p>\u56db\u3001\u6027\u80fd\u4e0e\u6548\u7387<\/p>\n<\/p>\n<p><p>\u5728\u9009\u62e9\u5e73\u65b9\u6839\u8ba1\u7b97\u65b9\u6cd5\u65f6\uff0c\u6027\u80fd\u548c\u6548\u7387\u662f\u9700\u8981\u8003\u8651\u7684\u91cd\u8981\u56e0\u7d20\u3002<\/p>\n<\/p>\n<ol>\n<li>\n<p><strong>math.sqrt() vs \u5e42\u8fd0\u7b97\u7b26<\/strong><br \/>math.sqrt()\u901a\u5e38\u6bd4\u5e42\u8fd0\u7b97\u7b26\u66f4\u5feb\uff0c\u56e0\u4e3a\u5b83\u662f\u4e00\u4e2a\u7279\u5b9a\u7684\u51fd\u6570\uff0c\u4e13\u95e8\u7528\u4e8e\u8ba1\u7b97\u5e73\u65b9\u6839\uff0c\u800c\u5e42\u8fd0\u7b97\u7b26\u5219\u662f\u4e00\u4e2a\u901a\u7528\u7684\u8fd0\u7b97\u7b26\uff0c\u53ef\u80fd\u4f1a\u6d89\u53ca\u66f4\u591a\u8ba1\u7b97\u6b65\u9aa4\u3002\u5bf9\u4e8e\u5927\u89c4\u6a21\u8ba1\u7b97\uff0c\u4f7f\u7528math.sqrt()\u53ef\u80fd\u66f4\u5177\u4f18\u52bf\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>cmath.sqrt()\u7684\u7279\u6b8a\u6027<\/strong><br \/>cmath.sqrt()\u867d\u7136\u9002\u7528\u8303\u56f4\u66f4\u5e7f\uff0c\u4f46\u5728\u5904\u7406\u975e\u590d\u6570\u65f6\uff0c\u6548\u7387\u53ef\u80fd\u4e0d\u5982math.sqrt()\uff0c\u56e0\u6b64\u9664\u975e\u7279\u522b\u9700\u8981\u5904\u7406\u590d\u6570\uff0c\u5426\u5219\u5efa\u8bae\u4f7f\u7528math.sqrt()\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n<p><p>\u4e94\u3001\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u8003\u8651<\/p>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u6765\u8ba1\u7b97\u5e73\u65b9\u6839\u9700\u8981\u8003\u8651\u591a\u79cd\u56e0\u7d20\uff0c\u5305\u62ec\u4ee3\u7801\u7684\u7b80\u6d01\u6027\u3001\u53ef\u8bfb\u6027\u3001\u6027\u80fd\u9700\u6c42\u4ee5\u53ca\u8f93\u5165\u6570\u636e\u7684\u6027\u8d28\u3002<\/p>\n<\/p>\n<ol>\n<li>\n<p><strong>\u4ee3\u7801\u53ef\u8bfb\u6027<\/strong><br \/>\u5bf9\u4e8e\u4e00\u822c\u7528\u9014\uff0cmath.sqrt()\u63d0\u4f9b\u4e86\u4e00\u4e2a\u660e\u786e\u7684\u51fd\u6570\u8c03\u7528\uff0c\u589e\u5f3a\u4e86\u4ee3\u7801\u53ef\u8bfb\u6027\uff0c\u7279\u522b\u662f\u5728\u56e2\u961f\u534f\u4f5c\u548c\u4ee3\u7801\u7ef4\u62a4\u4e2d\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u6570\u636e\u6027\u8d28<\/strong><br \/>\u5982\u679c\u8f93\u5165\u6570\u636e\u53ef\u80fd\u5305\u542b\u8d1f\u6570\u6216\u8005\u9700\u8981\u5904\u7406\u590d\u6570\uff0ccmath.sqrt()\u662f\u9996\u9009\u65b9\u6cd5\u3002\u800c\u5728\u786e\u5b9a\u6570\u636e\u4e3a\u975e\u8d1f\u7684\u60c5\u51b5\u4e0b\uff0cmath.sqrt()\u6216\u5e42\u8fd0\u7b97\u7b26\u5747\u53ef\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u6027\u80fd\u9700\u6c42<\/strong><br \/>\u5728\u9700\u8981\u5927\u91cf\u8ba1\u7b97\u7684\u573a\u5408\uff0c\u9009\u62e9\u6027\u80fd\u66f4\u4f18\u7684math.sqrt()\u662f\u4e00\u4e2a\u660e\u667a\u7684\u9009\u62e9\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n<p><p>\u901a\u8fc7\u5408\u7406\u9009\u62e9\u9002\u5408\u7684\u5e73\u65b9\u6839\u8ba1\u7b97\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u5347Python\u7a0b\u5e8f\u7684\u53ef\u9760\u6027\u548c\u6548\u7387\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6839\u636e\u5177\u4f53\u9700\u6c42\u7075\u6d3b\u5e94\u7528\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5c06\u5e2e\u52a9\u5f00\u53d1\u8005\u66f4\u597d\u5730\u89e3\u51b3\u95ee\u9898\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5728Python\u4e2d\uff0c\u5982\u4f55\u4f7f\u7528\u5185\u7f6e\u51fd\u6570\u8ba1\u7b97\u5e73\u65b9\u6839\uff1f<\/strong><br \/>Python\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5185\u7f6e\u7684<code>math<\/code>\u6a21\u5757\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u540d\u4e3a<code>sqrt()<\/code>\u7684\u51fd\u6570\uff0c\u53ef\u4ee5\u7528\u4e8e\u8ba1\u7b97\u5e73\u65b9\u6839\u3002\u4f7f\u7528\u8fd9\u4e2a\u51fd\u6570\u65f6\uff0c\u9996\u5148\u9700\u8981\u5bfc\u5165<code>math<\/code>\u6a21\u5757\uff0c\u63a5\u7740\u53ef\u4ee5\u4f20\u5165\u9700\u8981\u8ba1\u7b97\u5e73\u65b9\u6839\u7684\u6570\u503c\u3002\u4f8b\u5982\uff0c<code>import math<\/code>\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528<code>math.sqrt(16)<\/code>\u6765\u5f97\u52304.0\u7684\u7ed3\u679c\u3002<\/p>\n<p><strong>\u5982\u679c\u6211\u60f3\u8ba1\u7b97\u5176\u4ed6\u6839\uff0c\u6bd4\u5982\u7acb\u65b9\u6839\uff0c\u8be5\u600e\u4e48\u505a\uff1f<\/strong><br \/>\u8ba1\u7b97\u7acb\u65b9\u6839\u53ef\u4ee5\u4f7f\u7528\u5e42\u8fd0\u7b97\u7b26<code>&lt;strong&gt;<\/code>\uff0c\u4f8b\u5982\uff0c\u60f3\u8981\u8ba1\u7b978\u7684\u7acb\u65b9\u6839\uff0c\u53ef\u4ee5\u4f7f\u7528\u8868\u8fbe\u5f0f<code>8 &lt;\/strong&gt; (1\/3)<\/code>\uff0c\u8fd9\u5c06\u8fd4\u56de2.0\u3002\u4e5f\u53ef\u4ee5\u501f\u52a9<code>math<\/code>\u6a21\u5757\u4e2d\u7684<code>pow()<\/code>\u51fd\u6570\uff0c<code>math.pow(8, 1\/3)<\/code>\u540c\u6837\u53ef\u4ee5\u5f97\u5230\u7acb\u65b9\u6839\u7684\u7ed3\u679c\u3002<\/p>\n<p><strong>\u5728Python\u4e2d\uff0c\u5982\u4f55\u5904\u7406\u8d1f\u6570\u7684\u5e73\u65b9\u6839\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u76f4\u63a5\u8ba1\u7b97\u8d1f\u6570\u7684\u5e73\u65b9\u6839\u4f1a\u5bfc\u81f4\u9519\u8bef\uff0c\u56e0\u4e3a\u5e73\u65b9\u6839\u5728\u5b9e\u6570\u8303\u56f4\u5185\u662f\u672a\u5b9a\u4e49\u7684\u3002\u5982\u679c\u9700\u8981\u8ba1\u7b97\u8d1f\u6570\u7684\u5e73\u65b9\u6839\uff0c\u53ef\u4ee5\u4f7f\u7528<code>cmath<\/code>\u6a21\u5757\uff0c\u5b83\u652f\u6301\u590d\u6570\u3002\u793a\u4f8b\u4ee3\u7801\uff1a<code>import cmath<\/code>\u540e\uff0c\u4f7f\u7528<code>cmath.sqrt(-4)<\/code>\u5c06\u8fd4\u56de2j\uff0c\u8868\u793a\u590d\u65702i\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5f00\u5934\u6bb5\u843d:\u5728Python\u4e2d\u6c42\u5f00\u65b9\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff1a\u4f7f\u7528\u5e42\u8fd0\u7b97\u7b26\u3001math\u5e93\u7684sqrt\u51fd\u6570\u3001cmath\u5e93\u7684sqrt\u51fd [&hellip;]","protected":false},"author":3,"featured_media":949713,"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\/949708"}],"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=949708"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/949708\/revisions"}],"predecessor-version":[{"id":949718,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/949708\/revisions\/949718"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/949713"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=949708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=949708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=949708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}