{"id":928416,"date":"2024-12-26T16:34:30","date_gmt":"2024-12-26T08:34:30","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/928416.html"},"modified":"2024-12-26T16:34:33","modified_gmt":"2024-12-26T08:34:33","slug":"python-%e5%a6%82%e4%bd%95%e6%89%93%e5%8d%b0%e5%b0%8f%e6%95%b0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/928416.html","title":{"rendered":"python \u5982\u4f55\u6253\u5370\u5c0f\u6570"},"content":{"rendered":"

\"python<\/p>\n

\u5728Python\u4e2d\u6253\u5370\u5c0f\u6570\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528format()<\/code>\u51fd\u6570\u3001f-string<\/code>\u683c\u5f0f\u5316\u4ee5\u53caround()<\/code>\u51fd\u6570\u7b49\u3002<\/strong>\u4f7f\u7528format()<\/code>\u51fd\u6570\u53ef\u4ee5\u81ea\u5b9a\u4e49\u5c0f\u6570\u4f4d\u6570\uff0cf-string<\/code>\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u7684\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u800cround()<\/code>\u51fd\u6570\u7528\u4e8e\u5bf9\u6570\u5b57\u8fdb\u884c\u56db\u820d\u4e94\u5165\u3002\u8fd9\u91cc\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u5229\u7528\u8fd9\u4e9b\u65b9\u6cd5\u6253\u5370\u5c0f\u6570\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528format()<\/code>\u51fd\u6570<\/p>\n<\/p>\n

format()<\/code>\u51fd\u6570\u662f\u4e00\u79cd\u7075\u6d3b\u7684\u65b9\u6cd5\uff0c\u7528\u4e8e\u683c\u5f0f\u5316\u8f93\u51fa\u3002\u5b83\u53ef\u4ee5\u6307\u5b9a\u5c0f\u6570\u7684\u4f4d\u6570\u3001\u5bf9\u9f50\u65b9\u5f0f\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u4f53\u7684\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n

    \n
  1. \n

    \u6307\u5b9a\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570<\/strong>
    format()<\/code>\u51fd\u6570\u5141\u8bb8\u6211\u4eec\u6307\u5b9a\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\u3002\u4f8b\u5982\uff0c"{:.2f}".format(3.14159)<\/code>\u5c06\u8f93\u51fa3.14<\/code>\u3002\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u9002\u5408\u5f53\u4f60\u9700\u8981\u56fa\u5b9a\u663e\u793a\u7684\u5c0f\u6570\u4f4d\u6570\u65f6\u3002<\/p>\n<\/p>\n<\/li>\n

  2. \n

    \u63a7\u5236\u8f93\u51fa\u683c\u5f0f<\/strong>
    \u901a\u8fc7format()<\/code>\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u5b57\u7b26\u4e32\u4e2d\u63d2\u5165\u53d8\u91cf\u5e76\u6307\u5b9a\u683c\u5f0f\u3002\u4f8b\u5982\uff0c"{:0>10.2f}".format(3.14159)<\/code>\u4f1a\u8f93\u51fa000003.14<\/code>\uff0c\u5176\u4e2d0>10.2f<\/code>\u8868\u793a\u603b\u957f\u5ea6\u4e3a10\uff0c\u5de6\u4fa7\u75280\u586b\u5145\uff0c\u5c0f\u6570\u4f4d\u6570\u4e3a2\u3002<\/p>\n<\/p>\n<\/li>\n

  3. \n

    \u79d1\u5b66\u8ba1\u6570\u6cd5\u683c\u5f0f\u5316<\/strong>
    \u5bf9\u4e8e\u975e\u5e38\u5927\u6216\u975e\u5e38\u5c0f\u7684\u6570\u5b57\uff0c\u53ef\u4ee5\u4f7f\u7528\u79d1\u5b66\u8ba1\u6570\u6cd5\u683c\u5f0f\u5316\uff0c\u4f8b\u5982\uff0c"{:.2e}".format(123456789)<\/code>\u4f1a\u8f93\u51fa1.23e+08<\/code>\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n

    \u4e8c\u3001\u4f7f\u7528f-string<\/code>\u683c\u5f0f\u5316<\/p>\n<\/p>\n

    \u81eaPython 3.6\u8d77\uff0cf-string<\/code>\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u4e14\u9ad8\u6548\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u3002\u5b83\u901a\u8fc7\u5728\u5b57\u7b26\u4e32\u524d\u52a0\u4e0af<\/code>\uff0c\u5e76\u4f7f\u7528\u5927\u62ec\u53f7{}<\/code>\u5305\u88f9\u53d8\u91cf\u548c\u683c\u5f0f\u8bf4\u660e\u7b26\u3002<\/p>\n<\/p>\n

      \n
    1. \n

      \u57fa\u672c\u4f7f\u7528<\/strong>
      \u5982\u679c\u6211\u4eec\u60f3\u5728\u5b57\u7b26\u4e32\u4e2d\u63d2\u5165\u5c0f\u6570\u5e76\u6307\u5b9a\u5176\u7cbe\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528f"{value:.2f}"<\/code>\u683c\u5f0f\u3002\u4f8b\u5982\uff0cvalue = 3.14159<\/code>\uff0cf"The value is {value:.2f}"<\/code>\u5c06\u8f93\u51faThe value is 3.14<\/code>\u3002<\/p>\n<\/p>\n<\/li>\n

    2. \n

      \u7075\u6d3b\u7684\u683c\u5f0f\u63a7\u5236<\/strong>
      f-string<\/code>\u4e0d\u4ec5\u652f\u6301\u5c0f\u6570\u4f4d\u6570\u63a7\u5236\uff0c\u8fd8\u652f\u6301\u5bf9\u9f50\u548c\u586b\u5145\u3002\u4f8b\u5982\uff0cf"{value:0>10.2f}"<\/code>\u5c06\u5728\u5de6\u4fa7\u586b\u51450\uff0c\u4f7f\u603b\u957f\u5ea6\u4e3a10\u3002<\/p>\n<\/p>\n<\/li>\n

    3. \n

      \u7ed3\u5408\u8868\u8fbe\u5f0f\u4f7f\u7528<\/strong>
      f-string<\/code>\u5141\u8bb8\u5728\u5927\u62ec\u53f7\u4e2d\u653e\u5165\u8868\u8fbe\u5f0f\u8fdb\u884c\u8ba1\u7b97\uff0c\u4f8b\u5982\uff0cf"The result is {3.14159 * 2:.2f}"<\/code>\u5c06\u8f93\u51faThe result is 6.28<\/code>\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n

      \u4e09\u3001\u4f7f\u7528round()<\/code>\u51fd\u6570<\/p>\n<\/p>\n

      round()<\/code>\u51fd\u6570\u7528\u4e8e\u5bf9\u6d6e\u70b9\u6570\u8fdb\u884c\u56db\u820d\u4e94\u5165\uff0c\u8fd4\u56de\u4e00\u4e2a\u6307\u5b9a\u7cbe\u5ea6\u7684\u6570\u503c\u3002<\/p>\n<\/p>\n

        \n
      1. \n

        \u57fa\u672c\u7528\u6cd5<\/strong>
        \u4f7f\u7528round()<\/code>\u51fd\u6570\u53ef\u4ee5\u7b80\u5355\u5730\u5c06\u6570\u5b57\u56db\u820d\u4e94\u5165\u5230\u6307\u5b9a\u7684\u5c0f\u6570\u4f4d\u6570\u3002\u4f8b\u5982\uff0cround(3.14159, 2)<\/code>\u5c06\u8fd4\u56de3.14<\/code>\u3002<\/p>\n<\/p>\n<\/li>\n

      2. \n

        \u4e0eprint()<\/code>\u7ed3\u5408\u4f7f\u7528<\/strong>
        \u76f4\u63a5\u5728print()<\/code>\u51fd\u6570\u4e2d\u4f7f\u7528round()<\/code>\uff0c\u4f8b\u5982\uff0cprint(round(3.14159, 2))<\/code>\uff0c\u5c06\u8f93\u51fa3.14<\/code>\u3002<\/p>\n<\/p>\n<\/li>\n

      3. \n

        \u6ce8\u610f\u4e8b\u9879<\/strong>
        \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u7531\u4e8e\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\uff0cround()<\/code>\u53ef\u80fd\u4f1a\u8fd4\u56de\u610f\u60f3\u4e0d\u5230\u7684\u7ed3\u679c\uff0c\u4f8b\u5982round(2.675, 2)<\/code>\u53ef\u80fd\u4f1a\u8fd4\u56de2.67<\/code>\u3002\u8fd9\u9700\u8981\u7279\u522b\u6ce8\u610f\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n

        \u56db\u3001\u4f7f\u7528Decimal<\/code>\u6a21\u5757<\/p>\n<\/p>\n

        \u5bf9\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u573a\u5408\uff0cDecimal<\/code>\u6a21\u5757\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u9009\u62e9\u3002\u5b83\u63d0\u4f9b\u4e86\u5341\u8fdb\u5236\u6d6e\u70b9\u8fd0\u7b97\uff0c\u907f\u514d\u4e86\u4e00\u4e9b\u5e38\u89c1\u7684\u6d6e\u70b9\u6570\u95ee\u9898\u3002<\/p>\n<\/p>\n

          \n
        1. \n

          \u57fa\u672c\u4f7f\u7528<\/strong>
          \u5bfc\u5165Decimal<\/code>\u6a21\u5757\u5e76\u521b\u5efa\u4e00\u4e2aDecimal<\/code>\u5bf9\u8c61\uff0c\u4f8b\u5982\uff1a <\/p>\n<\/p>\n

          from decimal import Decimal<\/p>\n
          value = Decimal('3.14159')<\/p>\n
          print(value)<\/p>\n
          <\/code><\/pre>\n<\/p>\n<\/li>\n
        2. \n
          \u7cbe\u5ea6\u63a7\u5236<\/strong>
          \u53ef\u4ee5\u901a\u8fc7Decimal<\/code>\u5bf9\u8c61\u7684\u65b9\u6cd5\u6765\u8bbe\u7f6e\u5c0f\u6570\u7684\u7cbe\u5ea6\u3002\u4f8b\u5982\uff1a  <\/p>\n<\/p>\n
          from decimal import Decimal, getcontext<\/p>\n
          getcontext().prec = 3<\/p>\n
          value = Decimal('3.14159')<\/p>\n
          print(value)  # \u8f93\u51fa3.14<\/p>\n
          <\/code><\/pre>\n<\/p>\n<\/li>\n
        3. \n
          \u907f\u514d\u6d6e\u70b9\u8bef\u5dee<\/strong>
          Decimal<\/code>\u6a21\u5757\u80fd\u591f\u907f\u514d\u5e38\u89c1\u7684\u6d6e\u70b9\u6570\u8bef\u5dee\uff0c\u662f\u91d1\u878d\u8ba1\u7b97\u7b49\u9700\u8981\u9ad8\u7cbe\u5ea6\u573a\u5408\u7684\u7406\u60f3\u9009\u62e9\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
          \u4e94\u3001\u683c\u5f0f\u5316\u8f93\u51fa\u5176\u4ed6\u7ec6\u8282<\/p>\n<\/p>\n
          \u9664\u4e86\u5c0f\u6570\u4f4d\u6570\uff0c\u683c\u5f0f\u5316\u8f93\u51fa\u8fd8\u53ef\u4ee5\u6d89\u53ca\u5176\u4ed6\u7ec6\u8282\uff0c\u5982\u5bf9\u9f50\u3001\u5bbd\u5ea6\u8bbe\u7f6e\u7b49\u3002<\/p>\n<\/p>\n
            \n
          1. \n
            \u5bf9\u9f50\u4e0e\u5bbd\u5ea6<\/strong>
            \u53ef\u4ee5\u901a\u8fc7\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u8bbe\u7f6e\u8f93\u51fa\u7684\u5bbd\u5ea6\u548c\u5bf9\u9f50\u65b9\u5f0f\uff0c\u4f8b\u5982\uff1a"{:<10.2f}".format(3.14159)<\/code>\u8868\u793a\u5de6\u5bf9\u9f50\uff0c\u603b\u5bbd\u5ea6\u4e3a10\u3002<\/p>\n<\/p>\n<\/li>\n
          2. \n
            \u586b\u5145\u5b57\u7b26<\/strong>
            \u4f7f\u7528:<\/code>\u540e\u52a0\u4e0a\u586b\u5145\u5b57\u7b26\u548c\u5bbd\u5ea6\uff0c\u53ef\u4ee5\u5b9a\u5236\u8f93\u51fa\u683c\u5f0f\uff0c\u4f8b\u5982\uff1a"{:*>10.2f}".format(3.14159)<\/code>\u4f1a\u8f93\u51fa<strong><\/strong>*3.14<\/code>\u3002<\/p>\n<\/p>\n<\/li>\n
          3. \n
            \u7ec4\u5408\u4f7f\u7528<\/strong>
            \u53ef\u4ee5\u5c06\u591a\u79cd\u683c\u5f0f\u5316\u9009\u9879\u7ec4\u5408\u4f7f\u7528\uff0c\u6ee1\u8db3\u590d\u6742\u7684\u8f93\u51fa\u8981\u6c42\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
            \u901a\u8fc7\u5bf9\u4ee5\u4e0a\u51e0\u79cd\u65b9\u6cd5\u7684\u719f\u7ec3\u638c\u63e1\uff0c\u53ef\u4ee5\u5728Python\u4e2d\u4ee5\u591a\u79cd\u65b9\u5f0f\u6253\u5370\u5c0f\u6570\uff0c\u6ee1\u8db3\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u548c\u9700\u6c42\u3002\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u4ec5\u63d0\u4f9b\u4e86\u7075\u6d3b\u6027\uff0c\u8fd8\u80fd\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6613\u7ef4\u62a4\u6027\u3002<\/p>\n<\/p>\n
            \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
             \u5982\u4f55\u5728Python\u4e2d\u63a7\u5236\u5c0f\u6570\u7684\u4f4d\u6570\uff1f<\/strong>
            \u5728Python\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u6216\u5185\u7f6e\u7684round()<\/code>\u51fd\u6570\u6765\u63a7\u5236\u5c0f\u6570\u7684\u4f4d\u6570\u3002\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u65f6\uff0c\u53ef\u4ee5\u91c7\u7528f-string<\/code>\u6216str.format()<\/code>\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u4f7f\u7528f-string\u53ef\u4ee5\u8fd9\u6837\u5199\uff1aprint(f"{value:.2f}")<\/code>\uff0c\u8fd9\u6837\u4f1a\u5c06value<\/code>\u6253\u5370\u4e3a\u4e24\u4f4d\u5c0f\u6570\u3002\u5982\u679c\u4f7f\u7528round()<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u8fd9\u6837\u5199\uff1aprint(round(value, 2))<\/code>\uff0c\u8fd9\u5c06\u628avalue<\/code>\u56db\u820d\u4e94\u5165\u5230\u4e24\u4f4d\u5c0f\u6570\u3002<\/p>\n
            Python\u4e2d\u6253\u5370\u5c0f\u6570\u65f6\u6709\u4ec0\u4e48\u5e38\u89c1\u9519\u8bef\uff1f<\/strong>
            \u5728\u6253\u5370\u5c0f\u6570\u65f6\uff0c\u5e38\u89c1\u7684\u9519\u8bef\u5305\u62ec\u672a\u6b63\u786e\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff0c\u5bfc\u81f4\u6253\u5370\u7ed3\u679c\u4e0d\u7b26\u5408\u9884\u671f\u3002\u6b64\u5916\uff0c\u76f4\u63a5\u6253\u5370\u6d6e\u70b9\u6570\u53ef\u80fd\u4f1a\u51fa\u73b0\u7cbe\u5ea6\u95ee\u9898\uff0c\u56e0\u6b64\u5efa\u8bae\u4f7f\u7528round()<\/code>\u6216\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u6765\u786e\u4fdd\u7ed3\u679c\u7684\u51c6\u786e\u6027\u3002\u786e\u4fdd\u5728\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\u65f6\uff0c\u53c2\u6570\u7684\u7c7b\u578b\u548c\u4f4d\u7f6e\u662f\u6b63\u786e\u7684\uff0c\u4ee5\u907f\u514d\u5f15\u53d1\u5f02\u5e38\u6216\u9519\u8bef\u7684\u8f93\u51fa\u3002<\/p>\n
            \u6709\u6ca1\u6709\u66f4\u7b80\u5355\u7684\u65b9\u6cd5\u5728Python\u4e2d\u6253\u5370\u5c0f\u6570\uff1f<\/strong>
            \u5982\u679c\u60a8\u5e0c\u671b\u5feb\u901f\u6253\u5370\u5c0f\u6570\u800c\u4e0d\u9700\u8981\u7279\u5b9a\u7684\u683c\u5f0f\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528print()<\/code>\u51fd\u6570\u3002\u5bf9\u4e8e\u7b80\u5355\u7684\u573a\u666f\uff0cPython\u4f1a\u81ea\u52a8\u5904\u7406\u5c0f\u6570\u7684\u8f93\u51fa\u3002\u4f8b\u5982\uff0cprint(value)<\/code>\u4f1a\u663e\u793avalue<\/code>\u7684\u539f\u59cb\u6d6e\u70b9\u6570\u503c\u3002\u5982\u679c\u6ca1\u6709\u7279\u522b\u7684\u683c\u5f0f\u9700\u6c42\uff0c\u8fd9\u79cd\u65b9\u5f0f\u662f\u76f8\u5bf9\u7b80\u5355\u65b9\u4fbf\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u6253\u5370\u5c0f\u6570\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528format()\u51fd\u6570\u3001f-string\u683c\u5f0f\u5316\u4ee5\u53caround()\u51fd\u6570\u7b49\u3002\u4f7f […]","protected":false},"author":3,"featured_media":928421,"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\/928416"}],"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=928416"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/928416\/revisions"}],"predecessor-version":[{"id":928422,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/928416\/revisions\/928422"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/928421"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=928416"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=928416"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=928416"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}