{"id":1124460,"date":"2025-01-08T19:41:43","date_gmt":"2025-01-08T11:41:43","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1124460.html"},"modified":"2025-01-08T19:41:45","modified_gmt":"2025-01-08T11:41:45","slug":"python-%e5%a6%82%e4%bd%95%e8%be%93%e5%87%ba%e5%b0%8f%e6%95%b0%e7%82%b9%e5%90%8e%e4%b8%a4%e4%bd%8d","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1124460.html","title":{"rendered":"python \u5982\u4f55\u8f93\u51fa\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25085517\/0115ca3f-e61e-4dcd-bcd5-fe027bf4bff6.webp\" alt=\"python \u5982\u4f55\u8f93\u51fa\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\" \/><\/p>\n<p><p> <strong>Python \u8f93\u51fa\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u65b9\u6cd5\u6709\u5f88\u591a\u79cd\uff0c\u4f8b\u5982\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001<code>round()<\/code>\u51fd\u6570\u3001<code>decimal<\/code>\u6a21\u5757\u7b49\u3002<\/strong> \u5728\u8fd9\u7bc7\u535a\u5ba2\u4e2d\uff0c\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u51e0\u79cd\u5e38\u89c1\u4e14\u6709\u6548\u7684\u65b9\u6cd5\uff0c\u5e76\u63a8\u8350\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u7684\u6700\u4f73\u4f7f\u7528\u65b9\u6cd5\u3002<strong>\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/strong> \u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u4e4b\u4e00\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4ec5\u7b80\u5355\u6613\u7528\uff0c\u800c\u4e14\u975e\u5e38\u7075\u6d3b\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u6765\u8f93\u51fa\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u5c0f\u6570\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u662fPython\u4e2d\u975e\u5e38\u5f3a\u5927\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u8ba9\u6211\u4eec\u66f4\u7075\u6d3b\u5730\u63a7\u5236\u8f93\u51fa\u683c\u5f0f\u3002\u6700\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u6709\u4e09\u79cd\uff1a<\/p>\n<\/p>\n<ol>\n<li><strong>\u767e\u5206\u53f7\u683c\u5f0f\u5316<\/strong><\/li>\n<li><strong><code>str.format()<\/code>\u65b9\u6cd5<\/strong><\/li>\n<li><strong>f-string\uff08\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\uff09<\/strong><\/li>\n<\/ol>\n<p><h4>1.1 \u767e\u5206\u53f7\u683c\u5f0f\u5316<\/h4>\n<\/p>\n<p><p>\u767e\u5206\u53f7\u683c\u5f0f\u5316\u662fPython\u65e9\u671f\u7248\u672c\u4e2d\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u3002\u5b83\u4f7f\u7528\u7c7b\u4f3c\u4e8eC\u8bed\u8a00\u7684\u683c\u5f0f\u5316\u7b26\u53f7\uff0c\u64cd\u4f5c\u8d77\u6765\u975e\u5e38\u76f4\u89c2\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">value = 12.34567<\/p>\n<p>formatted_value = &quot;%.2f&quot; % value<\/p>\n<p>print(formatted_value)  # \u8f93\u51fa\uff1a12.35<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>%.2f<\/code>\u4e2d\u7684<code>%.2<\/code>\u8868\u793a\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff0c<code>f<\/code>\u8868\u793a\u683c\u5f0f\u5316\u4e3a\u6d6e\u70b9\u6570\u3002<\/p>\n<\/p>\n<p><h4>1.2 <code>str.format()<\/code>\u65b9\u6cd5<\/h4>\n<\/p>\n<p><p><code>str.format()<\/code>\u65b9\u6cd5\u662fPython 3\u4e2d\u5f15\u5165\u7684\u4e00\u79cd\u66f4\u5f3a\u5927\u3001\u66f4\u7075\u6d3b\u7684\u683c\u5f0f\u5316\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">value = 12.34567<\/p>\n<p>formatted_value = &quot;{:.2f}&quot;.format(value)<\/p>\n<p>print(formatted_value)  # \u8f93\u51fa\uff1a12.35<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>{:.2f}<\/code>\u4e2d\u7684<code>:.2<\/code>\u540c\u6837\u8868\u793a\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff0c<code>f<\/code>\u8868\u793a\u683c\u5f0f\u5316\u4e3a\u6d6e\u70b9\u6570\u3002<\/p>\n<\/p>\n<p><h4>1.3 f-string\uff08\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\uff09<\/h4>\n<\/p>\n<p><p>f-string\u662fPython 3.6\u5f15\u5165\u7684\u4e00\u79cd\u65b0\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u5b83\u66f4\u52a0\u7b80\u6d01\u548c\u9ad8\u6548\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">value = 12.34567<\/p>\n<p>formatted_value = f&quot;{value:.2f}&quot;<\/p>\n<p>print(formatted_value)  # \u8f93\u51fa\uff1a12.35<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>f&quot;{value:.2f}&quot;<\/code>\u4e2d\u7684<code>:.2<\/code>\u8868\u793a\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff0c<code>f<\/code>\u8868\u793a\u683c\u5f0f\u5316\u4e3a\u6d6e\u70b9\u6570\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u4f7f\u7528<code>round()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n<p><p><code>round()<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u7528\u6765\u5c06\u6d6e\u70b9\u6570\u56db\u820d\u4e94\u5165\u5230\u6307\u5b9a\u7684\u7cbe\u5ea6\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">value = 12.34567<\/p>\n<p>rounded_value = round(value, 2)<\/p>\n<p>print(rounded_value)  # \u8f93\u51fa\uff1a12.35<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>round(value, 2)<\/code>\u8868\u793a\u5c06<code>value<\/code>\u56db\u820d\u4e94\u5165\u5230\u4e24\u4f4d\u5c0f\u6570\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\u66f4\u9ad8\u7cbe\u5ea6\u7684\u6d6e\u70b9\u6570\u8fd0\u7b97\uff0c\u975e\u5e38\u9002\u5408\u7528\u4e8e\u91d1\u878d\u8ba1\u7b97\u7b49\u5bf9\u7cbe\u5ea6\u8981\u6c42\u8f83\u9ad8\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from decimal import Decimal, ROUND_HALF_UP<\/p>\n<p>value = Decimal(&quot;12.34567&quot;)<\/p>\n<p>rounded_value = value.quantize(Decimal(&quot;0.01&quot;), rounding=ROUND_HALF_UP)<\/p>\n<p>print(rounded_value)  # \u8f93\u51fa\uff1a12.35<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>Decimal(&quot;0.01&quot;)<\/code>\u8868\u793a\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff0c<code>ROUND_HALF_UP<\/code>\u8868\u793a\u56db\u820d\u4e94\u5165\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u4e0d\u540c\u65b9\u6cd5\u7684\u4f7f\u7528\u573a\u666f<\/h3>\n<\/p>\n<p><h4>4.1 \u5904\u7406\u7b80\u5355\u7684\u8f93\u51fa<\/h4>\n<\/p>\n<p><p>\u5982\u679c\u53ea\u662f\u9700\u8981\u7b80\u5355\u5730\u8f93\u51fa\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u5c0f\u6570\uff0c\u53ef\u4ee5\u9009\u62e9\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u4e2d\u7684\u4efb\u610f\u4e00\u79cd\u3002\u63a8\u8350\u4f7f\u7528f-string\uff0c\u56e0\u4e3a\u5b83\u66f4\u52a0\u7b80\u6d01\u548c\u9ad8\u6548\u3002<\/p>\n<\/p>\n<p><h4>4.2 \u8fdb\u884c\u56db\u820d\u4e94\u5165\u8fd0\u7b97<\/h4>\n<\/p>\n<p><p>\u5982\u679c\u9700\u8981\u8fdb\u884c\u56db\u820d\u4e94\u5165\u8fd0\u7b97\uff0c\u53ef\u4ee5\u4f7f\u7528<code>round()<\/code>\u51fd\u6570\u3002\u5b83\u64cd\u4f5c\u7b80\u5355\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u573a\u666f\u3002<\/p>\n<\/p>\n<p><h4>4.3 \u5904\u7406\u9ad8\u7cbe\u5ea6\u8fd0\u7b97<\/h4>\n<\/p>\n<p><p>\u5982\u679c\u9700\u8981\u8fdb\u884c\u9ad8\u7cbe\u5ea6\u7684\u6d6e\u70b9\u6570\u8fd0\u7b97\uff0c\u5efa\u8bae\u4f7f\u7528<code>decimal<\/code>\u6a21\u5757\u3002\u5b83\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7684\u7cbe\u5ea6\u548c\u66f4\u591a\u7684\u63a7\u5236\u9009\u9879\uff0c\u9002\u5408\u91d1\u878d\u8ba1\u7b97\u7b49\u5bf9\u7cbe\u5ea6\u8981\u6c42\u8f83\u9ad8\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n<p><h3>\u4e94\u3001\u603b\u7ed3<\/h3>\n<\/p>\n<p><p>Python\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u8f93\u51fa\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u5c0f\u6570\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001<code>round()<\/code>\u51fd\u6570\u548c<code>decimal<\/code>\u6a21\u5757\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u4f18\u7f3a\u70b9\u548c\u9002\u7528\u573a\u666f\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u6700\u5408\u9002\u7684\u65b9\u6cd5\u3002<strong>\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5<\/strong> \u7b80\u5355\u6613\u7528\uff0c\u975e\u5e38\u9002\u5408\u5904\u7406\u7b80\u5355\u7684\u8f93\u51fa\uff1b<strong><code>round()<\/code>\u51fd\u6570<\/strong> \u9002\u5408\u8fdb\u884c\u56db\u820d\u4e94\u5165\u8fd0\u7b97\uff1b<strong><code>decimal<\/code>\u6a21\u5757<\/strong> \u63d0\u4f9b\u4e86\u66f4\u9ad8\u7684\u7cbe\u5ea6\u548c\u66f4\u591a\u7684\u63a7\u5236\u9009\u9879\uff0c\u9002\u5408\u91d1\u878d\u8ba1\u7b97\u7b49\u5bf9\u7cbe\u5ea6\u8981\u6c42\u8f83\u9ad8\u7684\u573a\u666f\u3002\u5e0c\u671b\u8fd9\u7bc7\u535a\u5ba2\u80fd\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5728Python\u4e2d\uff0c\u5982\u4f55\u683c\u5f0f\u5316\u6570\u5b57\u4ee5\u4ec5\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u6216\u5185\u7f6e\u7684round()\u51fd\u6570\u6765\u5b9e\u73b0\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u8f93\u51fa\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff1a<code>&quot;{:.2f}&quot;.format(\u6570\u5b57)<\/code>\uff0c\u6216\u8005\u4f7f\u7528f-string\u8bed\u6cd5\uff1a<code>f&quot;{\u6570\u5b57:.2f}&quot;<\/code>\u3002\u8fd9\u4e24\u79cd\u65b9\u6cd5\u90fd\u4f1a\u5c06\u6570\u5b57\u683c\u5f0f\u5316\u4e3a\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<p><strong>\u4f7f\u7528round()\u51fd\u6570\u65f6\uff0c\u662f\u5426\u4f1a\u5bf9\u7ed3\u679c\u8fdb\u884c\u56db\u820d\u4e94\u5165\uff1f<\/strong><br \/>\u662f\u7684\uff0c\u4f7f\u7528round()\u51fd\u6570\u8fdb\u884c\u5c0f\u6570\u4f4d\u63a7\u5236\u65f6\uff0cPython\u4f1a\u6309\u7167\u6b63\u5e38\u7684\u56db\u820d\u4e94\u5165\u89c4\u5219\u5904\u7406\u3002\u4f8b\u5982\uff0c<code>round(3.14159, 2)<\/code>\u7684\u7ed3\u679c\u5c06\u662f3.14\uff0c\u800c<code>round(3.145, 2)<\/code>\u5219\u4f1a\u8fd4\u56de3.15\u3002<\/p>\n<p><strong>\u5982\u4f55\u5c06\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u7ed3\u679c\u8f6c\u5316\u4e3a\u5b57\u7b26\u4e32\u4ee5\u4fbf\u8f93\u51fa\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u5c06\u683c\u5f0f\u5316\u540e\u7684\u6570\u5b57\u76f4\u63a5\u8f6c\u5316\u4e3a\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u4f7f\u7528<code>str()<\/code>\u51fd\u6570\u5c06\u683c\u5f0f\u5316\u7ed3\u679c\u8f6c\u4e3a\u5b57\u7b26\u4e32\uff0c\u6216\u76f4\u63a5\u4f7f\u7528\u683c\u5f0f\u5316\u65b9\u6cd5\u751f\u6210\u5b57\u7b26\u4e32\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n<pre><code class=\"language-python\">number = 3.14159\nformatted_number = &quot;{:.2f}&quot;.format(number)\nprint(formatted_number)  # \u8f93\u51fa: 3.14\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u9002\u5408\u9700\u8981\u5c06\u6570\u503c\u4ee5\u7279\u5b9a\u683c\u5f0f\u5448\u73b0\u7ed9\u7528\u6237\u7684\u60c5\u51b5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python \u8f93\u51fa\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u65b9\u6cd5\u6709\u5f88\u591a\u79cd\uff0c\u4f8b\u5982\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001round()\u51fd\u6570\u3001decimal\u6a21\u5757\u7b49\u3002 [&hellip;]","protected":false},"author":3,"featured_media":1124463,"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\/1124460"}],"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=1124460"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1124460\/revisions"}],"predecessor-version":[{"id":1124465,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1124460\/revisions\/1124465"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1124463"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1124460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1124460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1124460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}