{"id":998350,"date":"2024-12-27T09:32:19","date_gmt":"2024-12-27T01:32:19","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/998350.html"},"modified":"2024-12-27T09:32:25","modified_gmt":"2024-12-27T01:32:25","slug":"python%e5%a6%82%e4%bd%95%e5%a4%84%e7%90%86double-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/998350.html","title":{"rendered":"python\u5982\u4f55\u5904\u7406double"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25073751\/a8dd6ee3-682a-48e1-8e22-705410091449.webp\" alt=\"python\u5982\u4f55\u5904\u7406double\" \/><\/p>\n<p><p> \u5f00\u5934\u6bb5\u843d\uff1a<br \/><strong>Python\u5904\u7406double\u7c7b\u578b\u7684\u6570\u503c\u4e3b\u8981\u901a\u8fc7float\u6570\u636e\u7c7b\u578b\u6765\u5b9e\u73b0\u3001\u9700\u8981\u6ce8\u610f\u7cbe\u5ea6\u95ee\u9898\u3001\u53ef\u4ee5\u4f7f\u7528Decimal\u6a21\u5757\u6765\u63d0\u9ad8\u7cbe\u5ea6\u3002<\/strong> \u5728Python\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528float\u7c7b\u578b\u6765\u8868\u793a\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\uff08double\uff09\u3002\u7136\u800c\uff0c\u7531\u4e8e\u6d6e\u70b9\u6570\u7684\u56fa\u6709\u7279\u6027\uff0c\u5904\u7406\u7cbe\u5ea6\u95ee\u9898\u65f6\u53ef\u80fd\u4f1a\u9047\u5230\u4e00\u4e9b\u6311\u6218\u3002\u4e3a\u4e86\u5e94\u5bf9\u8fd9\u4e9b\u95ee\u9898\uff0cPython\u63d0\u4f9b\u4e86Decimal\u6a21\u5757\uff0c\u8be5\u6a21\u5757\u5141\u8bb8\u7528\u6237\u4ee5\u4efb\u610f\u7cbe\u5ea6\u8fdb\u884c\u6d6e\u70b9\u8fd0\u7b97\u3002\u901a\u8fc7\u4f7f\u7528Decimal\u6a21\u5757\uff0c\u7528\u6237\u53ef\u4ee5\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u6570\u503c\u8ba1\u7b97\u65f6\u907f\u514d\u5e38\u89c1\u7684\u6d6e\u70b9\u8bef\u5dee\u3002\u6b64\u5916\uff0cPython\u8fd8\u63d0\u4f9b\u4e86\u5176\u4ed6\u5185\u7f6e\u51fd\u6570\u548c\u6a21\u5757\uff0c\u5982math\u6a21\u5757\u548cNumPy\u5e93\uff0c\u8fd9\u4e9b\u5de5\u5177\u53ef\u7528\u4e8e\u5904\u7406\u548c\u8ba1\u7b97\u6d6e\u70b9\u6570\uff0c\u6ee1\u8db3\u5404\u79cd\u590d\u6742\u7684\u6570\u503c\u8ba1\u7b97\u9700\u6c42\u3002<\/p>\n<\/p>\n<p><p>\u4e00\u3001PYTHON\u4e2d\u7684FLOAT\u6570\u636e\u7c7b\u578b<\/p>\n<\/p>\n<p><p>\u5728Python\u4e2d\uff0c\u6d6e\u70b9\u6570\uff08float\uff09\u662f\u7528\u4e8e\u8868\u793a\u5c0f\u6570\u548c\u5927\u6570\u7684\u6807\u51c6\u6570\u636e\u7c7b\u578b\u3002\u6d6e\u70b9\u6570\u5728\u8ba1\u7b97\u673a\u4e2d\u4f7f\u7528\u4e8c\u8fdb\u5236\u8868\u793a\uff0c\u56e0\u6b64\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u7cbe\u5ea6\u635f\u5931\u3002Python\u4e2d\u7684float\u7c7b\u578b\u901a\u5e38\u662f\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\uff0c\u4e0e\u5927\u591a\u6570\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u4e2d\u7684double\u76f8\u4f3c\u3002<\/p>\n<\/p>\n<p><p>Python\u7684float\u7c7b\u578b\u53ef\u4ee5\u8868\u793a\u975e\u5e38\u5927\u7684\u6570\u503c\u8303\u56f4\uff0c\u5e76\u4e14\u53ef\u4ee5\u5904\u7406\u79d1\u5b66\u8bb0\u6570\u6cd5\u8868\u793a\u7684\u6570\u503c\u3002\u4f8b\u5982\uff0c1.23e10\u8868\u793a1.23\u4e58\u4ee510\u768410\u6b21\u65b9\u3002\u7136\u800c\uff0c\u7531\u4e8e\u6d6e\u70b9\u6570\u8868\u793a\u7684\u65b9\u5f0f\uff0c\u8ba1\u7b97\u7ed3\u679c\u53ef\u80fd\u4f1a\u51fa\u73b0\u820d\u5165\u8bef\u5dee\u3002\u56e0\u6b64\uff0c\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u573a\u5408\uff0c\u5e94\u8c28\u614e\u4f7f\u7528float\u7c7b\u578b\u3002<\/p>\n<\/p>\n<p><p>\u4e8c\u3001\u7cbe\u5ea6\u95ee\u9898\u53ca\u5176\u89e3\u51b3\u65b9\u6848<\/p>\n<\/p>\n<ol>\n<li>\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898<\/li>\n<\/ol>\n<p><p>\u6d6e\u70b9\u6570\u5728\u8ba1\u7b97\u673a\u4e2d\u4ee5\u6709\u9650\u4f4d\u6570\u8868\u793a\uff0c\u8fd9\u610f\u5473\u7740\u5728\u8ba1\u7b97\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u51fa\u73b0\u820d\u5165\u8bef\u5dee\u3002\u4f8b\u5982\uff0c\u8ba1\u7b970.1 + 0.2\u65f6\uff0c\u7ed3\u679c\u53ef\u80fd\u4e0d\u662f0.3\uff0c\u800c\u662f0.30000000000000004\u3002\u8fd9\u662f\u56e0\u4e3a\u6d6e\u70b9\u6570\u5728\u4e8c\u8fdb\u5236\u4e2d\u4e0d\u80fd\u7cbe\u786e\u8868\u793a\u67d0\u4e9b\u5c0f\u6570\u3002<\/p>\n<\/p>\n<ol start=\"2\">\n<li>\u4f7f\u7528Decimal\u6a21\u5757\u63d0\u9ad8\u7cbe\u5ea6<\/li>\n<\/ol>\n<p><p>\u4e3a\u4e86\u63d0\u9ad8\u6570\u503c\u8ba1\u7b97\u7684\u7cbe\u5ea6\uff0cPython\u63d0\u4f9b\u4e86Decimal\u6a21\u5757\u3002Decimal\u5141\u8bb8\u7528\u6237\u4ee5\u4efb\u610f\u7cbe\u5ea6\u8fdb\u884c\u8ba1\u7b97\uff0c\u907f\u514d\u4e86\u6d6e\u70b9\u6570\u7684\u820d\u5165\u8bef\u5dee\u3002\u4f7f\u7528Decimal\u6a21\u5757\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u4f7f\u7528Decimal\u5bf9\u8c61\u4ee3\u66fffloat\u8fdb\u884c\u8ba1\u7b97\u3002<\/li>\n<li>\u8bbe\u7f6e\u7cbe\u5ea6\u548c\u820d\u5165\u6a21\u5f0f\uff0c\u4ee5\u6ee1\u8db3\u7279\u5b9a\u9700\u6c42\u3002<\/li>\n<li>\u901a\u8fc7\u5bfc\u5165\u6a21\u5757\u5e76\u521b\u5efaDecimal\u5bf9\u8c61\u6765\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<p><pre><code class=\"language-python\">from decimal import Decimal, getcontext<\/p>\n<h2><strong>\u8bbe\u7f6e\u5168\u5c40\u7cbe\u5ea6<\/strong><\/h2>\n<p>getcontext().prec = 28<\/p>\n<p>a = Decimal(&#39;0.1&#39;)<\/p>\n<p>b = Decimal(&#39;0.2&#39;)<\/p>\n<p>c = a + b<\/p>\n<p>print(c)  # \u8f93\u51fa: 0.3<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u4e09\u3001NUMPY\u5e93\u4e2d\u7684\u6d6e\u70b9\u6570\u64cd\u4f5c<\/p>\n<\/p>\n<p><p>NumPy\u662fPython\u4e2d\u4e00\u4e2a\u5f3a\u5927\u7684\u5e93\uff0c\u7528\u4e8e\u5904\u7406\u5927\u578b\u6570\u7ec4\u548c\u77e9\u9635\u8fd0\u7b97\u3002NumPy\u63d0\u4f9b\u4e86\u591a\u79cd\u6570\u636e\u7c7b\u578b\u6765\u8868\u793a\u6d6e\u70b9\u6570\uff0c\u5305\u62ecfloat32\u548cfloat64\u3002\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u5141\u8bb8\u7528\u6237\u6839\u636e\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u7cbe\u5ea6\u3002<\/p>\n<\/p>\n<ol>\n<li>NumPy\u6d6e\u70b9\u6570\u7684\u8868\u793a<\/li>\n<\/ol>\n<p><p>NumPy\u4e2d\u7684float32\u548cfloat64\u5206\u522b\u8868\u793a32\u4f4d\u548c64\u4f4d\u6d6e\u70b9\u6570\u3002float64\u901a\u5e38\u7528\u4e8e\u9700\u8981\u66f4\u9ad8\u7cbe\u5ea6\u7684\u8ba1\u7b97\uff0c\u800cfloat32\u5219\u9002\u7528\u4e8e\u5185\u5b58\u53d7\u9650\u7684\u573a\u5408\u3002<\/p>\n<\/p>\n<ol start=\"2\">\n<li>\u4f7f\u7528NumPy\u8fdb\u884c\u6570\u503c\u8ba1\u7b97<\/li>\n<\/ol>\n<p><p>NumPy\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u51fd\u6570\u5e93\uff0c\u7528\u4e8e\u5904\u7406\u548c\u8ba1\u7b97\u6d6e\u70b9\u6570\u3002\u8fd9\u4e9b\u51fd\u6570\u652f\u6301\u77e2\u91cf\u5316\u8fd0\u7b97\uff0c\u4f7f\u5f97\u6570\u503c\u8ba1\u7b97\u66f4\u9ad8\u6548\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import numpy as np<\/p>\n<h2><strong>\u521b\u5efa\u6d6e\u70b9\u6570\u7ec4<\/strong><\/h2>\n<p>a = np.array([0.1, 0.2, 0.3], dtype=np.float64)<\/p>\n<p>b = np.array([0.4, 0.5, 0.6], dtype=np.float64)<\/p>\n<h2><strong>\u6570\u7ec4\u8fd0\u7b97<\/strong><\/h2>\n<p>c = a + b<\/p>\n<p>print(c)  # \u8f93\u51fa: [0.5 0.7 0.9]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u56db\u3001MATH\u6a21\u5757\u53ca\u5176\u4ed6\u5185\u7f6e\u51fd\u6570<\/p>\n<\/p>\n<p><p>Python\u7684math\u6a21\u5757\u63d0\u4f9b\u4e86\u8bb8\u591a\u7528\u4e8e\u5904\u7406\u6d6e\u70b9\u6570\u7684\u51fd\u6570\u3002\u8fd9\u4e9b\u51fd\u6570\u53ef\u4ee5\u6267\u884c\u5404\u79cd\u6570\u5b66\u8fd0\u7b97\uff0c\u5982\u4e09\u89d2\u51fd\u6570\u3001\u5bf9\u6570\u8fd0\u7b97\u548c\u6307\u6570\u8fd0\u7b97\u3002<\/p>\n<\/p>\n<ol>\n<li>\u4f7f\u7528math\u6a21\u5757\u8fdb\u884c\u8fd0\u7b97<\/li>\n<\/ol>\n<p><p>math\u6a21\u5757\u4e2d\u7684\u51fd\u6570\u53ef\u4ee5\u76f4\u63a5\u7528\u4e8efloat\u7c7b\u578b\u7684\u6570\u503c\u8ba1\u7b97\u3002\u4f8b\u5982\uff0cmath.sqrt()\u7528\u4e8e\u8ba1\u7b97\u5e73\u65b9\u6839\uff0cmath.sin()\u7528\u4e8e\u8ba1\u7b97\u6b63\u5f26\u503c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import math<\/p>\n<h2><strong>\u8ba1\u7b97\u5e73\u65b9\u6839<\/strong><\/h2>\n<p>sqrt_value = math.sqrt(9.0)<\/p>\n<p>print(sqrt_value)  # \u8f93\u51fa: 3.0<\/p>\n<h2><strong>\u8ba1\u7b97\u6b63\u5f26\u503c<\/strong><\/h2>\n<p>sin_value = math.sin(math.pi \/ 2)<\/p>\n<p>print(sin_value)  # \u8f93\u51fa: 1.0<\/p>\n<p><\/code><\/pre>\n<\/p>\n<ol start=\"2\">\n<li>\u5176\u4ed6\u5185\u7f6e\u51fd\u6570<\/li>\n<\/ol>\n<p><p>\u9664\u4e86math\u6a21\u5757\uff0cPython\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5185\u7f6e\u51fd\u6570\u7528\u4e8e\u5904\u7406\u6d6e\u70b9\u6570\u3002\u4f8b\u5982\uff0cround()\u51fd\u6570\u7528\u4e8e\u820d\u5165\u6d6e\u70b9\u6570\uff0cabs()\u51fd\u6570\u7528\u4e8e\u6c42\u7edd\u5bf9\u503c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u820d\u5165\u6d6e\u70b9\u6570<\/p>\n<p>rounded_value = round(3.14159, 2)<\/p>\n<p>print(rounded_value)  # \u8f93\u51fa: 3.14<\/p>\n<h2><strong>\u6c42\u7edd\u5bf9\u503c<\/strong><\/h2>\n<p>abs_value = abs(-5.5)<\/p>\n<p>print(abs_value)  # \u8f93\u51fa: 5.5<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u4e94\u3001\u6d6e\u70b9\u6570\u7684\u6700\u4f73\u5b9e\u8df5<\/p>\n<\/p>\n<p><p>\u5728\u5904\u7406\u6d6e\u70b9\u6570\u65f6\uff0c\u9075\u5faa\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5\u53ef\u4ee5\u5e2e\u52a9\u907f\u514d\u5e38\u89c1\u7684\u9519\u8bef\u548c\u95ee\u9898\u3002<\/p>\n<\/p>\n<ol>\n<li>\u907f\u514d\u76f4\u63a5\u6bd4\u8f83\u6d6e\u70b9\u6570<\/li>\n<\/ol>\n<p><p>\u7531\u4e8e\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\uff0c\u76f4\u63a5\u6bd4\u8f83\u4e24\u4e2a\u6d6e\u70b9\u6570\u7684\u76f8\u7b49\u6027\u53ef\u80fd\u4f1a\u5bfc\u81f4\u610f\u5916\u7ed3\u679c\u3002\u5e94\u4f7f\u7528\u4e00\u4e2a\u5c0f\u7684\u8bef\u5dee\u8303\u56f4\u6765\u6bd4\u8f83\u4e24\u4e2a\u6d6e\u70b9\u6570\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">a = 0.1 + 0.2<\/p>\n<p>b = 0.3<\/p>\n<h2><strong>\u4f7f\u7528\u8bef\u5dee\u8303\u56f4\u8fdb\u884c\u6bd4\u8f83<\/strong><\/h2>\n<p>tolerance = 1e-9<\/p>\n<p>if abs(a - b) &lt; tolerance:<\/p>\n<p>    print(&quot;a \u548c b \u76f8\u7b49&quot;)<\/p>\n<p>else:<\/p>\n<p>    print(&quot;a \u548c b \u4e0d\u76f8\u7b49&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<ol start=\"2\">\n<li>\u4f7f\u7528Decimal\u8fdb\u884c\u9ad8\u7cbe\u5ea6\u8ba1\u7b97<\/li>\n<\/ol>\n<p><p>\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u573a\u5408\uff0c\u5e94\u4f7f\u7528Decimal\u6a21\u5757\u4ee3\u66fffloat\u8fdb\u884c\u8ba1\u7b97\u3002\u901a\u8fc7\u8bbe\u7f6e\u7cbe\u5ea6\u548c\u820d\u5165\u6a21\u5f0f\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u8ba1\u7b97\u7ed3\u679c\u3002<\/p>\n<\/p>\n<ol start=\"3\">\n<li>\u4f7f\u7528NumPy\u8fdb\u884c\u5927\u89c4\u6a21\u6570\u503c\u8fd0\u7b97<\/li>\n<\/ol>\n<p><p>\u5bf9\u4e8e\u5927\u89c4\u6a21\u6570\u503c\u8ba1\u7b97\uff0cNumPy\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u6570\u7ec4\u64cd\u4f5c\u548c\u77e2\u91cf\u5316\u8fd0\u7b97\u3002\u8fd9\u4e9b\u529f\u80fd\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u8ba1\u7b97\u6548\u7387\u3002<\/p>\n<\/p>\n<p><p>\u516d\u3001\u603b\u7ed3<\/p>\n<\/p>\n<p><p>Python\u4e2d\u5904\u7406double\u7c7b\u578b\u7684\u6570\u503c\u4e3b\u8981\u901a\u8fc7float\u6570\u636e\u7c7b\u578b\u6765\u5b9e\u73b0\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\u3002\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u6570\u503c\u8ba1\u7b97\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528Decimal\u6a21\u5757\u6765\u63d0\u9ad8\u7cbe\u5ea6\u3002\u6b64\u5916\uff0cNumPy\u5e93\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u51fd\u6570\u548c\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u5904\u7406\u548c\u8ba1\u7b97\u6d6e\u70b9\u6570\u3002\u901a\u8fc7\u9075\u5faa\u6700\u4f73\u5b9e\u8df5\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514d\u6d6e\u70b9\u6570\u8ba1\u7b97\u4e2d\u7684\u5e38\u89c1\u95ee\u9898\u3002Python\u7684\u591a\u79cd\u5de5\u5177\u548c\u6a21\u5757\u4f7f\u5f97\u6570\u503c\u8ba1\u7b97\u66f4\u52a0\u7075\u6d3b\u548c\u9ad8\u6548\uff0c\u6ee1\u8db3\u4e86\u4e0d\u540c\u573a\u5408\u7684\u9700\u6c42\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u5904\u7406\u6d6e\u70b9\u6570\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u6d6e\u70b9\u6570\u53ef\u4ee5\u901a\u8fc7\u5185\u7f6e\u7684<code>float<\/code>\u7c7b\u578b\u8fdb\u884c\u5904\u7406\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u7b80\u5355\u7684\u6570\u5b66\u8fd0\u7b97\u6765\u8fdb\u884c\u52a0\u3001\u51cf\u3001\u4e58\u3001\u9664\u7b49\u64cd\u4f5c\u3002\u5bf9\u4e8e\u7cbe\u5ea6\u8981\u6c42\u8f83\u9ad8\u7684\u8ba1\u7b97\uff0c\u5efa\u8bae\u4f7f\u7528<code>decimal<\/code>\u6a21\u5757\uff0c\u5b83\u80fd\u591f\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u5ea6\u548c\u63a7\u5236\u3002\u4f7f\u7528\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-python\">from decimal import Decimal\n\na = Decimal(&#39;0.1&#39;)\nb = Decimal(&#39;0.2&#39;)\nresult = a + b\nprint(result)  # \u8f93\u51fa 0.3\n<\/code><\/pre>\n<p><strong>Python\u4e2d\u7684\u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\u5982\u4f55\u89e3\u51b3\uff1f<\/strong><br \/>\u6d6e\u70b9\u6570\u5728\u8ba1\u7b97\u4e2d\u53ef\u80fd\u4f1a\u51fa\u73b0\u7cbe\u5ea6\u95ee\u9898\uff0c\u8fd9\u662f\u7531\u4e8e\u4e8c\u8fdb\u5236\u8868\u793a\u6cd5\u7684\u9650\u5236\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u4f7f\u7528<code>round()<\/code>\u51fd\u6570\u6765\u63a7\u5236\u5c0f\u6570\u4f4d\u6570\uff0c\u6216\u8005\u4f7f\u7528<code>decimal<\/code>\u6a21\u5757\u6765\u8fdb\u884c\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u3002\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u51cf\u5c11\u8ba1\u7b97\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684\u8bef\u5dee\u3002<\/p>\n<p><strong>\u5728Python\u4e2d\u5982\u4f55\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6d6e\u70b9\u6570\uff1f<\/strong><br \/>\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6d6e\u70b9\u6570\u975e\u5e38\u7b80\u5355\uff0c\u53ef\u4ee5\u4f7f\u7528<code>float()<\/code>\u51fd\u6570\u3002\u4f8b\u5982\uff0c<code>float(&quot;3.14&quot;)<\/code>\u5c06\u8fd4\u56de\u6d6e\u70b9\u6570<code>3.14<\/code>\u3002\u5728\u8f6c\u6362\u65f6\uff0c\u9700\u8981\u786e\u4fdd\u5b57\u7b26\u4e32\u80fd\u591f\u88ab\u6b63\u786e\u89e3\u6790\u4e3a\u4e00\u4e2a\u6d6e\u70b9\u6570\uff0c\u5426\u5219\u4f1a\u5f15\u53d1<code>ValueError<\/code>\u3002\u53ef\u4ee5\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u6765\u6355\u83b7\u8fd9\u79cd\u60c5\u51b5\uff0c\u4ece\u800c\u786e\u4fdd\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n<pre><code class=\"language-python\">try:\n    num = float(&quot;3.14&quot;)\nexcept ValueError:\n    print(&quot;\u65e0\u6cd5\u8f6c\u6362\u4e3a\u6d6e\u70b9\u6570&quot;)\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5f00\u5934\u6bb5\u843d\uff1aPython\u5904\u7406double\u7c7b\u578b\u7684\u6570\u503c\u4e3b\u8981\u901a\u8fc7float\u6570\u636e\u7c7b\u578b\u6765\u5b9e\u73b0\u3001\u9700\u8981\u6ce8\u610f\u7cbe\u5ea6\u95ee\u9898\u3001\u53ef\u4ee5\u4f7f\u7528D [&hellip;]","protected":false},"author":3,"featured_media":998353,"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\/998350"}],"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=998350"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/998350\/revisions"}],"predecessor-version":[{"id":998355,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/998350\/revisions\/998355"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/998353"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=998350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=998350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=998350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}