{"id":1137355,"date":"2025-01-08T21:47:34","date_gmt":"2025-01-08T13:47:34","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1137355.html"},"modified":"2025-01-08T21:47:37","modified_gmt":"2025-01-08T13:47:37","slug":"python-%e5%a6%82%e4%bd%95%e4%bf%9d%e8%af%81%e8%be%93%e5%87%ba%e5%80%bc%e6%9c%89%e4%b8%a4%e4%bd%8d%e5%b0%8f%e6%95%b0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1137355.html","title":{"rendered":"python.\u5982\u4f55\u4fdd\u8bc1\u8f93\u51fa\u503c\u6709\u4e24\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\/25101219\/b335801b-6f68-43a0-ad39-e240889ab2ed.webp\" alt=\"python.\u5982\u4f55\u4fdd\u8bc1\u8f93\u51fa\u503c\u6709\u4e24\u4f4d\u5c0f\u6570\" \/><\/p>\n<p><p> <strong>\u901a\u8fc7\u4f7f\u7528Python\u4e2d\u7684\u5185\u7f6e\u51fd\u6570\u548c\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u53ef\u4ee5\u786e\u4fdd\u8f93\u51fa\u503c\u6709\u4e24\u4f4d\u5c0f\u6570\u3002\u5173\u952e\u65b9\u6cd5\u5305\u62ec\uff1a\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3001\u4f7f\u7528round()\u51fd\u6570\u3001\u548c\u5229\u7528Decimal\u6a21\u5757\u3002\u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u4f18\u52a3\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u60c5\u51b5\u9009\u62e9\u4f7f\u7528\u3002<\/strong> \u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u5982\u4f55\u5728Python\u4e2d\u786e\u4fdd\u8f93\u51fa\u503c\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff0c\u5e76\u6df1\u5165\u5206\u6790\u6bcf\u79cd\u65b9\u6cd5\u7684\u9002\u7528\u573a\u666f\u548c\u4f18\u52bf\u3002<\/p>\n<\/p>\n<p><h2>\u4e00\u3001\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32<\/h2>\n<\/p>\n<p><h3>1.1 \u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u7b80\u4ecb<\/h3>\n<\/p>\n<p><p>\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u662fPython\u4e2d\u4e00\u79cd\u5e38\u89c1\u4e14\u7075\u6d3b\u7684\u65b9\u5f0f\uff0c\u7528\u4e8e\u63a7\u5236\u8f93\u51fa\u7684\u6837\u5f0f\u3002\u901a\u8fc7\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u6307\u5b9a\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\u3002<\/p>\n<\/p>\n<p><h3>1.2 \u4f7f\u7528f-string\u683c\u5f0f\u5316<\/h3>\n<\/p>\n<p><p>f-string\uff08\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\uff09\u662fPython 3.6\u5f15\u5165\u7684\u4e00\u79cd\u65b0\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u7b80\u6d01\u3001\u66f4\u6613\u8bfb\u7684\u65b9\u5f0f\u6765\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">value = 3.14159<\/p>\n<p>formatted_value = f&quot;{value:.2f}&quot;<\/p>\n<p>print(formatted_value)  # \u8f93\u51fa: 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c<code>f&quot;{value:.2f}&quot;<\/code>\u8868\u793a\u5c06<code>value<\/code>\u683c\u5f0f\u5316\u4e3a\u4e00\u4e2a\u5c0f\u6570\u70b9\u540e\u6709\u4e24\u4f4d\u7684\u6d6e\u70b9\u6570\u3002<\/p>\n<\/p>\n<p><h3>1.3 \u4f7f\u7528format()\u65b9\u6cd5<\/h3>\n<\/p>\n<p><p><code>format()<\/code>\u65b9\u6cd5\u662f\u53e6\u4e00\u79cd\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u7684\u5e38\u7528\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">value = 3.14159<\/p>\n<p>formatted_value = &quot;{:.2f}&quot;.format(value)<\/p>\n<p>print(formatted_value)  # \u8f93\u51fa: 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u4e0ef-string\u7c7b\u4f3c\uff0c\u4f46\u5b83\u652f\u6301Python 2.7\u53ca\u4ee5\u4e0a\u7684\u7248\u672c\uff0c\u56e0\u6b64\u5728\u9700\u8981\u517c\u5bb9\u65e7\u7248\u672c\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n<p><h2>\u4e8c\u3001\u4f7f\u7528round()\u51fd\u6570<\/h2>\n<\/p>\n<p><h3>2.1 round()\u51fd\u6570\u7b80\u4ecb<\/h3>\n<\/p>\n<p><p><code>round()<\/code>\u51fd\u6570\u662fPython\u5185\u7f6e\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u7528\u4e8e\u5c06\u6d6e\u70b9\u6570\u56db\u820d\u4e94\u5165\u5230\u6307\u5b9a\u7684\u5c0f\u6570\u4f4d\u6570\u3002\u5b83\u7684\u57fa\u672c\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<p><p>\u5176\u4e2d\uff0c<code>number<\/code>\u662f\u9700\u8981\u56db\u820d\u4e94\u5165\u7684\u6570\u5b57\uff0c<code>ndigits<\/code>\u662f\u4fdd\u7559\u7684\u5c0f\u6570\u4f4d\u6570\u3002<\/p>\n<\/p>\n<p><h3>2.2 \u5b9e\u4f8b\u6f14\u793a<\/h3>\n<\/p>\n<p><pre><code class=\"language-python\">value = 3.14159<\/p>\n<p>rounded_value = round(value, 2)<\/p>\n<p>print(rounded_value)  # \u8f93\u51fa: 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d\uff0c<code>round(value, 2)<\/code>\u5c06<code>value<\/code>\u56db\u820d\u4e94\u5165\u5230\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u3002<\/p>\n<\/p>\n<p><h3>2.3 round()\u51fd\u6570\u7684\u5c40\u9650\u6027<\/h3>\n<\/p>\n<p><p>\u867d\u7136<code>round()<\/code>\u51fd\u6570\u53ef\u4ee5\u786e\u4fdd\u6570\u503c\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff0c\u4f46\u5b83\u8fd4\u56de\u7684\u7ed3\u679c\u662f\u4e00\u4e2a\u6d6e\u70b9\u6570\uff0c\u800c\u4e0d\u662f\u5b57\u7b26\u4e32\u3002\u5982\u679c\u9700\u8981\u8fdb\u4e00\u6b65\u683c\u5f0f\u5316\u8f93\u51fa\uff0c\u5219\u9700\u8981\u7ed3\u5408\u5176\u4ed6\u65b9\u6cd5\u4f7f\u7528\u3002<\/p>\n<\/p>\n<p><h2>\u4e09\u3001\u4f7f\u7528Decimal\u6a21\u5757<\/h2>\n<\/p>\n<p><h3>3.1 Decimal\u6a21\u5757\u7b80\u4ecb<\/h3>\n<\/p>\n<p><p><code>Decimal<\/code>\u6a21\u5757\u662fPython\u6807\u51c6\u5e93\u4e2d\u7684\u4e00\u4e2a\u6a21\u5757\uff0c\u4e13\u95e8\u7528\u4e8e\u5904\u7406\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\u3002\u4e0e\u5185\u7f6e\u7684\u6d6e\u70b9\u6570\u7c7b\u578b\u4e0d\u540c\uff0c<code>Decimal<\/code>\u7c7b\u578b\u53ef\u4ee5\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u5ea6\u548c\u66f4\u597d\u7684\u63a7\u5236\u3002<\/p>\n<\/p>\n<p><h3>3.2 \u521b\u5efaDecimal\u5bf9\u8c61<\/h3>\n<\/p>\n<p><p>\u8981\u4f7f\u7528<code>Decimal<\/code>\u6a21\u5757\uff0c\u9996\u5148\u9700\u8981\u5bfc\u5165\u5b83\u5e76\u521b\u5efa\u4e00\u4e2a<code>Decimal<\/code>\u5bf9\u8c61\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from decimal import Decimal<\/p>\n<p>value = Decimal(&#39;3.14159&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u6ce8\u610f\uff1a\u5728\u521b\u5efa<code>Decimal<\/code>\u5bf9\u8c61\u65f6\uff0c\u6700\u597d\u4f7f\u7528\u5b57\u7b26\u4e32\u5f62\u5f0f\u7684\u6570\u503c\uff0c\u4ee5\u907f\u514d\u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\u3002<\/p>\n<\/p>\n<p><h3>3.3 \u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570<\/h3>\n<\/p>\n<p><p>\u53ef\u4ee5\u4f7f\u7528<code>quantize()<\/code>\u65b9\u6cd5\u6765\u63a7\u5236<code>Decimal<\/code>\u5bf9\u8c61\u7684\u5c0f\u6570\u4f4d\u6570\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from decimal import Decimal, ROUND_HALF_UP<\/p>\n<p>value = Decimal(&#39;3.14159&#39;)<\/p>\n<p>rounded_value = value.quantize(Decimal(&#39;0.00&#39;), rounding=ROUND_HALF_UP)<\/p>\n<p>print(rounded_value)  # \u8f93\u51fa: 3.14<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d\uff0c<code>Decimal(&#39;0.00&#39;)<\/code>\u6307\u5b9a\u4e86\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>3.4 Decimal\u6a21\u5757\u7684\u4f18\u52bf<\/h3>\n<\/p>\n<p><p>\u4f7f\u7528<code>Decimal<\/code>\u6a21\u5757\u7684\u4e00\u4e2a\u4e3b\u8981\u4f18\u52bf\u662f\u5b83\u53ef\u4ee5\u907f\u514d\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\uff0c\u8fd9\u5728\u91d1\u878d\u548c\u79d1\u5b66\u8ba1\u7b97\u4e2d\u5c24\u4e3a\u91cd\u8981\u3002<\/p>\n<\/p>\n<p><h2>\u56db\u3001\u6bd4\u8f83\u4e0e\u603b\u7ed3<\/h2>\n<\/p>\n<p><h3>4.1 \u5404\u79cd\u65b9\u6cd5\u7684\u6bd4\u8f83<\/h3>\n<\/p>\n<ul>\n<li><strong>\u683c\u5f0f\u5316\u5b57\u7b26\u4e32<\/strong>\uff1a\u9002\u7528\u4e8e\u9700\u8981\u683c\u5f0f\u5316\u8f93\u51fa\u7684\u573a\u666f\uff0c\u4ee3\u7801\u7b80\u6d01\u6613\u8bfb\u3002<\/li>\n<li><strong>round()\u51fd\u6570<\/strong>\uff1a\u9002\u7528\u4e8e\u9700\u8981\u7b80\u5355\u56db\u820d\u4e94\u5165\u7684\u573a\u666f\uff0c\u4f46\u8fd4\u56de\u7684\u662f\u6d6e\u70b9\u6570\u3002<\/li>\n<li><strong>Decimal\u6a21\u5757<\/strong>\uff1a\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u548c\u63a7\u5236\u7684\u573a\u666f\uff0c\u5c24\u5176\u662f\u91d1\u878d\u8ba1\u7b97\u3002<\/li>\n<\/ul>\n<p><h3>4.2 \u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u9009\u62e9<\/h3>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u9700\u6c42\u3002\u5982\u679c\u53ea\u662f\u7b80\u5355\u7684\u8f93\u51fa\u683c\u5f0f\u5316\uff0c\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u53ef\u80fd\u662f\u6700\u65b9\u4fbf\u7684\u3002\u5982\u679c\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u8ba1\u7b97\uff0c<code>Decimal<\/code>\u6a21\u5757\u5219\u662f\u66f4\u597d\u7684\u9009\u62e9\u3002<\/p>\n<\/p>\n<p><p>\u65e0\u8bba\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\uff0c\u90fd\u5e94\u6839\u636e\u5177\u4f53\u573a\u666f\u548c\u9700\u6c42\u8fdb\u884c\u6743\u8861\u3002\u901a\u8fc7\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u66f4\u7075\u6d3b\u5730\u63a7\u5236Python\u4e2d\u6570\u503c\u7684\u8f93\u51fa\u683c\u5f0f\uff0c\u786e\u4fdd\u8f93\u51fa\u7b26\u5408\u9884\u671f\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u683c\u5f0f\u5316\u8f93\u51fa\u4e3a\u4e24\u4f4d\u5c0f\u6570\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684\u683c\u5f0f\u5316\u51fd\u6570\u6765\u786e\u4fdd\u8f93\u51fa\u503c\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u3002\u53ef\u4ee5\u4f7f\u7528<code>format()<\/code>\u65b9\u6cd5\uff0c\u6216\u8005\u4f7f\u7528f-string\uff08\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff09\u3002\u4f8b\u5982\uff0c<code>print(&quot;{:.2f}&quot;.format(value))<\/code> \u6216\u8005 <code>print(f&quot;{value:.2f}&quot;)<\/code> \u90fd\u53ef\u4ee5\u8fbe\u5230\u8fd9\u4e2a\u6548\u679c\u3002\u8fd9\u6837\uff0c\u65e0\u8bba\u8f93\u5165\u503c\u662f\u4ec0\u4e48\uff0c\u8f93\u51fa\u90fd\u4f1a\u663e\u793a\u4e3a\u4e24\u4f4d\u5c0f\u6570\u3002<\/p>\n<p><strong>\u662f\u5426\u53ef\u4ee5\u901a\u8fc7round\u51fd\u6570\u6765\u63a7\u5236\u8f93\u51fa\u7684\u5c0f\u6570\u4f4d\u6570\uff1f<\/strong><br \/>\u662f\u7684\uff0c<code>round()<\/code>\u51fd\u6570\u53ef\u4ee5\u7528\u6765\u63a7\u5236\u5c0f\u6570\u7684\u4f4d\u6570\u3002\u4f7f\u7528<code>round(value, 2)<\/code>\u53ef\u4ee5\u5c06\u6570\u503c\u56db\u820d\u4e94\u5165\u5230\u4e24\u4f4d\u5c0f\u6570\u3002\u4e0d\u8fc7\uff0c\u76f4\u63a5\u4f7f\u7528<code>round()<\/code>\u53ef\u80fd\u4e0d\u4f1a\u4ee5\u5b57\u7b26\u4e32\u5f62\u5f0f\u8f93\u51fa\uff0c\u56e0\u6b64\u5728\u6253\u5370\u65f6\uff0c\u6700\u597d\u7ed3\u5408\u683c\u5f0f\u5316\u65b9\u6cd5\u6765\u786e\u4fdd\u89c6\u89c9\u6548\u679c\u4e00\u81f4\u3002<\/p>\n<p><strong>\u5728\u5904\u7406\u6d6e\u70b9\u6570\u65f6\uff0c\u6709\u54ea\u4e9b\u5e38\u89c1\u7684\u8bef\u533a\u9700\u8981\u6ce8\u610f\uff1f<\/strong><br \/>\u5904\u7406\u6d6e\u70b9\u6570\u65f6\uff0c\u5e38\u89c1\u7684\u8bef\u533a\u5305\u62ec\u6d6e\u70b9\u6570\u7cbe\u5ea6\u95ee\u9898\u3002\u7531\u4e8e\u8ba1\u7b97\u673a\u5bf9\u6d6e\u70b9\u6570\u7684\u8868\u793a\u9650\u5236\uff0c\u67d0\u4e9b\u8fd0\u7b97\u53ef\u80fd\u5bfc\u81f4\u610f\u5916\u7ed3\u679c\u3002\u4e3a\u4e86\u786e\u4fdd\u8f93\u51fa\u7684\u51c6\u786e\u6027\uff0c\u53ef\u4ee5\u5728\u8f93\u51fa\u524d\u4f7f\u7528<code>Decimal<\/code>\u6a21\u5757\u6765\u8fdb\u884c\u7cbe\u786e\u8ba1\u7b97\u3002\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u56e0\u6d6e\u70b9\u6570\u7cbe\u5ea6\u5bfc\u81f4\u7684\u683c\u5f0f\u9519\u8bef\uff0c\u4f7f\u5f97\u8f93\u51fa\u7ed3\u679c\u7b26\u5408\u9884\u671f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u901a\u8fc7\u4f7f\u7528Python\u4e2d\u7684\u5185\u7f6e\u51fd\u6570\u548c\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u53ef\u4ee5\u786e\u4fdd\u8f93\u51fa\u503c\u6709\u4e24\u4f4d\u5c0f\u6570\u3002\u5173\u952e\u65b9\u6cd5\u5305\u62ec\uff1a\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3001\u4f7f\u7528rou [&hellip;]","protected":false},"author":3,"featured_media":1137363,"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\/1137355"}],"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=1137355"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1137355\/revisions"}],"predecessor-version":[{"id":1137365,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1137355\/revisions\/1137365"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1137363"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1137355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1137355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1137355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}