{"id":1079306,"date":"2025-01-08T12:19:38","date_gmt":"2025-01-08T04:19:38","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1079306.html"},"modified":"2025-01-08T12:19:42","modified_gmt":"2025-01-08T04:19:42","slug":"python%e8%ae%a1%e7%ae%97%e5%a6%82%e4%bd%95%e4%bf%9d%e7%95%99%e4%ba%8c%e4%bd%8d%e5%b0%8f%e6%95%b0-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1079306.html","title":{"rendered":"python\u8ba1\u7b97\u5982\u4f55\u4fdd\u7559\u4e8c\u4f4d\u5c0f\u6570"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24182423\/5666537a-40f1-4e34-973c-ea1f63072afd.webp\" alt=\"python\u8ba1\u7b97\u5982\u4f55\u4fdd\u7559\u4e8c\u4f4d\u5c0f\u6570\" \/><\/p>\n<p><p> <strong>\u4f7f\u7528Python\u8ba1\u7b97\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff1a\u4f7f\u7528\u5185\u7f6e\u7684 <code>round()<\/code> \u51fd\u6570\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001\u4f7f\u7528 <code>decimal<\/code> \u6a21\u5757\u3002<\/strong> \u5176\u4e2d\uff0c<code>round()<\/code> \u51fd\u6570\u662f\u6700\u7b80\u5355\u548c\u5e38\u7528\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0c<code>round(3.14159, 2)<\/code> \u5c06\u8fd4\u56de 3.14\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u8be6\u7ec6\u63cf\u8ff0\u8fd9\u4e09\u79cd\u65b9\u6cd5\uff0c\u5e76\u7ed9\u51fa\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u4f7f\u7528 <code>round()<\/code> \u51fd\u6570<\/h3>\n<\/p>\n<p><p><code>round()<\/code> \u662fPython\u5185\u7f6e\u51fd\u6570\uff0c\u53ef\u4ee5\u7528\u4e8e\u5c06\u6570\u5b57\u56db\u820d\u4e94\u5165\u5230\u6307\u5b9a\u7684\u5c0f\u6570\u4f4d\u6570\u3002\u5b83\u7684\u4f7f\u7528\u975e\u5e38\u7b80\u5355\uff0c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">round(number, ndigits)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<ul>\n<li><code>number<\/code> \u662f\u8981\u820d\u5165\u7684\u6570\u5b57<\/li>\n<li><code>ndigits<\/code> \u662f\u8981\u4fdd\u7559\u7684\u5c0f\u6570\u4f4d\u6570<\/li>\n<\/ul>\n<p><p>\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">number = 3.14159<\/p>\n<p>rounded_number = round(number, 2)<\/p>\n<p>print(rounded_number)  # \u8f93\u51fa 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u4f18\u70b9\uff1a<\/strong> \u7b80\u5355\u6613\u7528\uff0c\u9002\u5408\u5927\u591a\u6570\u5e94\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u4e5f\u662f\u4e00\u79cd\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u9002\u5408\u9700\u8981\u5728\u8f93\u51fa\u4e2d\u4fdd\u7559\u7279\u5b9a\u4f4d\u6570\u7684\u5c0f\u6570\u60c5\u51b5\u3002Python\u63d0\u4f9b\u4e86\u591a\u79cd\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u5305\u62ec <code>%<\/code> \u64cd\u4f5c\u7b26\u3001<code>format()<\/code> \u65b9\u6cd5\u548c f-strings\uff08Python 3.6+\uff09\u3002<\/p>\n<\/p>\n<p><h4>1. \u4f7f\u7528 <code>%<\/code> \u64cd\u4f5c\u7b26<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">number = 3.14159<\/p>\n<p>formatted_number = &quot;%.2f&quot; % number<\/p>\n<p>print(formatted_number)  # \u8f93\u51fa 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u4f7f\u7528 <code>format()<\/code> \u65b9\u6cd5<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">number = 3.14159<\/p>\n<p>formatted_number = &quot;{:.2f}&quot;.format(number)<\/p>\n<p>print(formatted_number)  # \u8f93\u51fa 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3. \u4f7f\u7528 f-strings\uff08Python 3.6+\uff09<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">number = 3.14159<\/p>\n<p>formatted_number = f&quot;{number:.2f}&quot;<\/p>\n<p>print(formatted_number)  # \u8f93\u51fa 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u4f18\u70b9\uff1a<\/strong> \u7075\u6d3b\u591a\u6837\uff0c\u9002\u5408\u591a\u79cd\u683c\u5f0f\u5316\u9700\u6c42\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u4f7f\u7528 <code>decimal<\/code> \u6a21\u5757<\/h3>\n<\/p>\n<p><p><code>decimal<\/code> \u6a21\u5757\u63d0\u4f9b\u4e86\u5bf9\u5341\u8fdb\u5236\u6d6e\u70b9\u8fd0\u7b97\u7684\u652f\u6301\uff0c\u53ef\u4ee5\u66f4\u7cbe\u786e\u5730\u63a7\u5236\u820d\u5165\u884c\u4e3a\uff0c\u9002\u5408\u5bf9\u7cbe\u5ea6\u8981\u6c42\u8f83\u9ad8\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n<p><h4>1. \u5bfc\u5165 <code>decimal<\/code> \u6a21\u5757\u5e76\u8bbe\u7f6e\u7cbe\u5ea6<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">from decimal import Decimal, ROUND_HALF_UP<\/p>\n<p>number = Decimal(&#39;3.14159&#39;)<\/p>\n<p>rounded_number = number.quantize(Decimal(&#39;0.00&#39;), rounding=ROUND_HALF_UP)<\/p>\n<p>print(rounded_number)  # \u8f93\u51fa 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u8bbe\u7f6e\u5168\u5c40\u7cbe\u5ea6<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">import decimal<\/p>\n<p>decimal.getcontext().prec = 2<\/p>\n<p>number = decimal.Decimal(&#39;3.14159&#39;)<\/p>\n<p>print(number)  # \u8f93\u51fa 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u4f18\u70b9\uff1a<\/strong> \u7cbe\u5ea6\u9ad8\uff0c\u9002\u5408\u91d1\u878d\u7b49\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u8ba1\u7b97\u573a\u666f\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u603b\u7ed3\u4e0e\u6ce8\u610f\u4e8b\u9879<\/h3>\n<\/p>\n<p><p>\u5728\u9009\u62e9\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u65b9\u6cd5\u65f6\uff0c\u5e94\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002\u5bf9\u4e8e\u4e00\u822c\u573a\u666f\uff0c<code>round()<\/code> \u51fd\u6570\u548c\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u5df2\u7ecf\u8db3\u591f\uff1b\u5bf9\u4e8e\u9ad8\u7cbe\u5ea6\u9700\u6c42\uff0c<code>decimal<\/code> \u6a21\u5757\u662f\u66f4\u597d\u7684\u9009\u62e9\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u65f6\u7684\u6ce8\u610f\u4e8b\u9879\uff1a<\/p>\n<\/p>\n<ol>\n<li><strong>\u820d\u5165\u65b9\u5f0f<\/strong>\uff1a<code>round()<\/code> \u51fd\u6570\u548c\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u9ed8\u8ba4\u4f7f\u7528\u201c\u56db\u820d\u4e94\u5165\u201d\u65b9\u5f0f\uff0c\u800c <code>decimal<\/code> \u6a21\u5757\u53ef\u4ee5\u6307\u5b9a\u591a\u79cd\u820d\u5165\u65b9\u5f0f\uff0c\u5982 <code>ROUND_HALF_UP<\/code>\u3001<code>ROUND_HALF_DOWN<\/code> \u7b49\u3002<\/li>\n<li><strong>\u6570\u503c\u7c7b\u578b<\/strong>\uff1a<code>round()<\/code> \u51fd\u6570\u548c\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u9002\u7528\u4e8e\u6d6e\u70b9\u6570\uff0c\u800c <code>decimal<\/code> \u6a21\u5757\u9002\u7528\u4e8e <code>Decimal<\/code> \u7c7b\u578b\u3002\u9700\u8981\u6ce8\u610f\u4e0d\u540c\u6570\u503c\u7c7b\u578b\u4e4b\u95f4\u7684\u8f6c\u6362\u3002<\/li>\n<li><strong>\u6027\u80fd<\/strong>\uff1a<code>round()<\/code> \u51fd\u6570\u548c\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u901a\u5e38\u6bd4 <code>decimal<\/code> \u6a21\u5757\u66f4\u5feb\uff0c\u4f46\u5728\u9ad8\u7cbe\u5ea6\u8981\u6c42\u573a\u666f\u4e0b\uff0c\u6027\u80fd\u5dee\u5f02\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\u3002<\/li>\n<\/ol>\n<p><p>\u901a\u8fc7\u4e0a\u8ff0\u65b9\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879\u7684\u7ed3\u5408\u5e94\u7528\uff0c\u53ef\u4ee5\u5728Python\u4e2d\u7075\u6d3b\u4e14\u9ad8\u6548\u5730\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff0c\u6ee1\u8db3\u4e0d\u540c\u5e94\u7528\u573a\u666f\u7684\u9700\u6c42\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u5c06\u6d6e\u70b9\u6570\u683c\u5f0f\u5316\u4e3a\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684<code>format()<\/code>\u51fd\u6570\u6216\u8005f-string\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u6765\u4fdd\u7559\u6d6e\u70b9\u6570\u7684\u4e24\u4f4d\u5c0f\u6570\u3002\u4f8b\u5982\uff0c\u4f7f\u7528<code>format()<\/code>\u51fd\u6570\u65f6\uff0c\u53ef\u4ee5\u5199\u6210<code>format(number, &quot;.2f&quot;)<\/code>\uff0c\u800c\u4f7f\u7528f-string\u65f6\uff0c\u53ef\u4ee5\u5199\u6210<code>f&quot;{number:.2f}&quot;<\/code>\u3002\u8fd9\u4e24\u79cd\u65b9\u6cd5\u90fd\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u8868\u793a\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u6d6e\u70b9\u6570\u3002<\/p>\n<p><strong>Python\u4e2d\u662f\u5426\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u529f\u80fd\uff1f<\/strong><br \/>\u9664\u4e86\u4f7f\u7528<code>format()<\/code>\u548cf-string\u4e4b\u5916\uff0cPython\u7684<code>round()<\/code>\u51fd\u6570\u4e5f\u53ef\u4ee5\u7528\u4e8e\u4fdd\u7559\u5c0f\u6570\u4f4d\u6570\u3002\u4f7f\u7528\u65b9\u6cd5\u4e3a<code>round(number, 2)<\/code>\uff0c\u5b83\u4f1a\u8fd4\u56de\u4e00\u4e2a\u6d6e\u70b9\u6570\uff0c\u56db\u820d\u4e94\u5165\u5230\u6307\u5b9a\u7684\u5c0f\u6570\u4f4d\u6570\u3002\u7136\u800c\uff0c\u4f7f\u7528<code>round()<\/code>\u65f6\u9700\u6ce8\u610f\uff0c\u5b83\u53ef\u80fd\u4f1a\u8fd4\u56de\u4e00\u4e2a\u6d6e\u70b9\u6570\u800c\u4e0d\u662f\u5b57\u7b26\u4e32\u3002<\/p>\n<p><strong>\u5982\u4f55\u5728Python\u4e2d\u5904\u7406\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\uff1f<\/strong><br \/>\u6d6e\u70b9\u6570\u5728\u8ba1\u7b97\u65f6\u53ef\u80fd\u4f1a\u51fa\u73b0\u7cbe\u5ea6\u95ee\u9898\uff0c\u8fd9\u662f\u7531\u6d6e\u70b9\u6570\u7684\u8868\u793a\u65b9\u5f0f\u5f15\u8d77\u7684\u3002\u4e3a\u4e86\u5904\u7406\u8fd9\u4e9b\u95ee\u9898\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528<code>decimal<\/code>\u6a21\u5757\u3002\u8fd9\u4e2a\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u4e2aDecimal\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u5b9e\u73b0\u66f4\u9ad8\u7cbe\u5ea6\u7684\u6570\u503c\u8ba1\u7b97\u3002\u901a\u8fc7<code>from decimal import Decimal<\/code>\u53ef\u4ee5\u5f15\u5165\u8be5\u6a21\u5757\uff0c\u521b\u5efaDecimal\u5bf9\u8c61\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528<code>quantize()<\/code>\u65b9\u6cd5\u6765\u8bbe\u7f6e\u5c0f\u6570\u4f4d\u6570\uff0c\u4f8b\u5982<code>decimal_value.quantize(Decimal(&#39;0.00&#39;))<\/code>\u3002\u8fd9\u79cd\u65b9\u5f0f\u80fd\u6709\u6548\u907f\u514d\u5e38\u89c1\u7684\u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4f7f\u7528Python\u8ba1\u7b97\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff1a\u4f7f\u7528\u5185\u7f6e\u7684 round() \u51fd\u6570\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001\u4f7f\u7528 dec [&hellip;]","protected":false},"author":3,"featured_media":1079309,"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\/1079306"}],"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=1079306"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1079306\/revisions"}],"predecessor-version":[{"id":1079310,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1079306\/revisions\/1079310"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1079309"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1079306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1079306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1079306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}