{"id":989576,"date":"2024-12-27T08:12:43","date_gmt":"2024-12-27T00:12:43","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/989576.html"},"modified":"2024-12-27T08:12:46","modified_gmt":"2024-12-27T00:12:46","slug":"python%e5%a6%82%e4%bd%95%e6%89%93%e5%8d%b0%e5%87%a0%e4%bd%8d%e5%b0%8f%e6%95%b0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/989576.html","title":{"rendered":"python\u5982\u4f55\u6253\u5370\u51e0\u4f4d\u5c0f\u6570"},"content":{"rendered":"

\"python\u5982\u4f55\u6253\u5370\u51e0\u4f4d\u5c0f\u6570\"<\/p>\n

\u5728Python\u4e2d\u6253\u5370\u6307\u5b9a\u4f4d\u6570\u7684\u5c0f\u6570\uff0c\u53ef\u4ee5\u901a\u8fc7\u51e0\u79cd\u65b9\u6cd5\u6765\u5b9e\u73b0\uff0c\u4e3b\u8981\u5305\u62ec\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001\u4f7f\u7528round\u51fd\u6570\u3001\u4f7f\u7528Decimal\u6a21\u5757<\/strong>\u7b49\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u8fd9\u4e9b\u65b9\u6cd5\u4e2d\u7684\u4e00\u79cd\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/h3>\n<\/p>\n

\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u662fPython\u4e2d\u5904\u7406\u6570\u5b57\u7cbe\u5ea6\u7684\u4e00\u79cd\u5e38\u7528\u65b9\u6cd5\u3002\u901a\u8fc7\u683c\u5f0f\u5316\u64cd\u4f5c\u7b26\u6216\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u6307\u5b9a\u5c0f\u6570\u4f4d\u6570\u3002<\/p>\n<\/p>\n

1.1 \u4f7f\u7528\u767e\u5206\u53f7%<\/code>\u683c\u5f0f\u5316<\/h4>\n<\/p>\n

\u53ef\u4ee5\u4f7f\u7528%<\/code>\u64cd\u4f5c\u7b26\u6765\u683c\u5f0f\u5316\u6d6e\u70b9\u6570\u3002%.nf<\/code>\u7684\u683c\u5f0f\u6307\u5b9a\u4e86\u4fdd\u7559n\u4f4d\u5c0f\u6570\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n

number = 3.1415926<\/p>\n
formatted_number = "%.2f" % number<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a3.14<\/p>\n
<\/code><\/pre>\n<\/p>\n
1.2 \u4f7f\u7528format()<\/code>\u65b9\u6cd5<\/h4>\n<\/p>\n
Python\u7684str.format()<\/code>\u65b9\u6cd5\u4e5f\u5141\u8bb8\u683c\u5f0f\u5316\u6570\u5b57\u3002\u8bed\u6cd5\u4e3a{:.nf}<\/code>\uff0c\u5176\u4e2dn\u4ee3\u8868\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\u3002<\/p>\n<\/p>\n
number = 3.1415926<\/p>\n
formatted_number = "{:.2f}".format(number)<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a3.14<\/p>\n
<\/code><\/pre>\n<\/p>\n
1.3 \u4f7f\u7528f-string\uff08Python 3.6+\uff09<\/h4>\n<\/p>\n
f-string\u662fPython 3.6\u4e2d\u5f15\u5165\u7684\u4e00\u79cd\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u7684\u65b9\u5f0f\uff0c\u4f7f\u7528\u5927\u62ec\u53f7{}<\/code>\u6307\u5b9a\u683c\u5f0f\uff1a<\/p>\n<\/p>\n
number = 3.1415926<\/p>\n
formatted_number = f"{number:.2f}"<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a3.14<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528round()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n
Python\u63d0\u4f9b\u4e86\u5185\u7f6e\u7684round()<\/code>\u51fd\u6570\uff0c\u53ef\u4ee5\u76f4\u63a5\u6307\u5b9a\u4fdd\u7559\u7684\u5c0f\u6570\u4f4d\u6570\u3002\u4e0d\u8fc7\uff0cround()<\/code>\u51fd\u6570\u7684\u7ed3\u679c\u662f\u6d6e\u70b9\u6570\uff0c\u53ef\u80fd\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u8868\u73b0\u51fa\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\u3002<\/p>\n<\/p>\n
number = 3.1415926<\/p>\n
rounded_number = round(number, 2)<\/p>\n
print(rounded_number)  # \u8f93\u51fa\uff1a3.14<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528Decimal<\/code>\u6a21\u5757<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u7684\u573a\u666f\uff0cDecimal<\/code>\u6a21\u5757\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u9009\u62e9\u3002Decimal<\/code>\u53ef\u4ee5\u907f\u514d\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\u3002<\/p>\n<\/p>\n
from decimal import Decimal, ROUND_HALF_UP<\/p>\n
number = Decimal('3.1415926')<\/p>\n
rounded_number = number.quantize(Decimal('0.00'), rounding=ROUND_HALF_UP)<\/p>\n
print(rounded_number)  # \u8f93\u51fa\uff1a3.14<\/p>\n
<\/code><\/pre>\n<\/p>\n
3.1 Decimal<\/code>\u6a21\u5757\u7684\u4f18\u70b9<\/h4>\n<\/p>\n
Decimal<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7684\u7cbe\u5ea6\u548c\u63a7\u5236\uff0c\u9002\u5408\u91d1\u878d\u8ba1\u7b97\u7b49\u9700\u8981\u7cbe\u786e\u5904\u7406\u7684\u5c0f\u6570\u573a\u666f\u3002ROUND_HALF_UP<\/code>\u662f\u56db\u820d\u4e94\u5165\u6a21\u5f0f\u4e4b\u4e00\uff0c\u786e\u4fdd\u820d\u5165\u7684\u7ed3\u679c\u7b26\u5408\u5e38\u89c4\u7684\u56db\u820d\u4e94\u5165\u89c4\u5219\u3002<\/p>\n<\/p>\n
\u56db\u3001\u603b\u7ed3\u4e0e\u5efa\u8bae<\/h3>\n<\/p>\n
\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
    \n
  • \u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/strong>\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u9002\u5408\u8f93\u51fa\u683c\u5f0f\u5316\u7ed3\u679c\u3002<\/li>\n
  • round()<\/code>\u51fd\u6570<\/strong>\u9002\u5408\u7b80\u5355\u7684\u820d\u5165\u64cd\u4f5c\uff0c\u4f46\u6ce8\u610f\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u95ee\u9898\u3002<\/li>\n
  • Decimal<\/code>\u6a21\u5757<\/strong>\u9002\u5408\u9700\u8981\u9ad8\u7cbe\u5ea6\u548c\u63a7\u5236\u7684\u573a\u666f\uff0c\u5982\u91d1\u878d\u8ba1\u7b97\u3002<\/li>\n<\/ul>\n
    \u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8003\u8651\u5230\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027\uff0c\u63a8\u8350\u4f7f\u7528f-string<\/strong>\u8fdb\u884c\u683c\u5f0f\u5316\uff0c\u56e0\u4e3a\u5b83\u7b80\u6d01\u660e\u4e86\u4e14\u6613\u4e8e\u7406\u89e3\u3002\u5bf9\u4e8e\u9700\u8981\u7cbe\u786e\u63a7\u5236\u7ed3\u679c\u7684\u573a\u666f\uff0cDecimal<\/code>\u6a21\u5757\u662f\u66f4\u597d\u7684\u9009\u62e9\u3002<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
     \u5982\u4f55\u5728Python\u4e2d\u63a7\u5236\u6d6e\u70b9\u6570\u7684\u663e\u793a\u7cbe\u5ea6\uff1f<\/strong>
    \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684\u683c\u5f0f\u5316\u51fd\u6570\u6765\u63a7\u5236\u6d6e\u70b9\u6570\u7684\u663e\u793a\u7cbe\u5ea6\u3002\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528format()<\/code>\u51fd\u6570\u3001\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff08f-string\uff09\u548cround()<\/code>\u51fd\u6570\u3002\u4f8b\u5982\uff0c\u4f7f\u7528f"{value:.2f}"<\/code>\u53ef\u4ee5\u5c06\u4e00\u4e2a\u6d6e\u70b9\u6570\u683c\u5f0f\u5316\u4e3a\u4e24\u4f4d\u5c0f\u6570\u3002\u6b64\u5916\uff0cround(value, 2)<\/code>\u4e5f\u53ef\u4ee5\u7528\u4e8e\u56db\u820d\u4e94\u5165\u5230\u6307\u5b9a\u7684\u5c0f\u6570\u4f4d\u6570\u3002<\/p>\n
    \u5728Python\u4e2d\u662f\u5426\u53ef\u4ee5\u6253\u5370\u4e0d\u540c\u683c\u5f0f\u7684\u6570\u503c\uff1f<\/strong>
    \u5f53\u7136\uff0cPython\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u5f0f\u6765\u6253\u5370\u4e0d\u540c\u683c\u5f0f\u7684\u6570\u503c\u3002\u9664\u4e86\u5c0f\u6570\u4f4d\u6570\u7684\u63a7\u5236\uff0c\u60a8\u8fd8\u53ef\u4ee5\u901a\u8fc7\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u6307\u5b9a\u5176\u4ed6\u683c\u5f0f\uff0c\u5982\u79d1\u5b66\u8bb0\u6570\u6cd5\u6216\u767e\u5206\u6bd4\u3002\u4f8b\u5982\uff0c\u4f7f\u7528"{:.2e}".format(value)<\/code>\u53ef\u4ee5\u5c06\u6570\u503c\u4ee5\u79d1\u5b66\u8ba1\u6570\u6cd5\u7684\u5f62\u5f0f\u8f93\u51fa\uff0c\u800c\u4f7f\u7528"{:.2%}".format(value)<\/code>\u5219\u53ef\u4ee5\u5c06\u6570\u503c\u8f6c\u6362\u4e3a\u767e\u5206\u6bd4\u5f62\u5f0f\u3002<\/p>\n
    \u4e3a\u4ec0\u4e48\u5728Python\u4e2d\u6d6e\u70b9\u6570\u663e\u793a\u7684\u4f4d\u6570\u548c\u5b9e\u9645\u503c\u53ef\u80fd\u4e0d\u4e00\u81f4\uff1f<\/strong>
    \u6d6e\u70b9\u6570\u5728\u8ba1\u7b97\u673a\u4e2d\u7684\u5b58\u50a8\u65b9\u5f0f\u53ef\u80fd\u5bfc\u81f4\u663e\u793a\u7684\u4f4d\u6570\u4e0e\u5b9e\u9645\u503c\u4e0d\u4e00\u81f4\uff0c\u8fd9\u4e3b\u8981\u662f\u7531\u4e8e\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\u9650\u5236\u548c\u4e8c\u8fdb\u5236\u8868\u793a\u5f15\u8d77\u7684\u3002\u5728\u8fdb\u884c\u6d6e\u70b9\u6570\u8fd0\u7b97\u65f6\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u820d\u5165\u8bef\u5dee\uff0c\u5efa\u8bae\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u65f6\u4f7f\u7528decimal<\/code>\u6a21\u5757\uff0c\u5b83\u80fd\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u5ea6\u548c\u66f4\u597d\u7684\u63a7\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u6253\u5370\u6307\u5b9a\u4f4d\u6570\u7684\u5c0f\u6570\uff0c\u53ef\u4ee5\u901a\u8fc7\u51e0\u79cd\u65b9\u6cd5\u6765\u5b9e\u73b0\uff0c\u4e3b\u8981\u5305\u62ec\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001\u4f7f\u7528round\u51fd\u6570\u3001\u4f7f\u7528 […]","protected":false},"author":3,"featured_media":989580,"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\/989576"}],"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=989576"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/989576\/revisions"}],"predecessor-version":[{"id":989585,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/989576\/revisions\/989585"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/989580"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=989576"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=989576"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=989576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}