{"id":1134529,"date":"2025-01-08T21:16:30","date_gmt":"2025-01-08T13:16:30","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1134529.html"},"modified":"2025-01-08T21:16:32","modified_gmt":"2025-01-08T13:16:32","slug":"python%e5%a6%82%e4%bd%95%e4%bf%9d%e7%95%99%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\/1134529.html","title":{"rendered":"python\u5982\u4f55\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d"},"content":{"rendered":"

\"python\u5982\u4f55\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\"<\/p>\n

\u4f7f\u7528Python\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u51e0\u79cd\u65b9\u6cd5\u5305\u62ec\uff1around()<\/code>\u51fd\u6570\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001decimal<\/code>\u6a21\u5757\u3002<\/strong><\/p>\n<\/p>\n

\u5728Python\u7f16\u7a0b\u4e2d\uff0c\u4f60\u4f1a\u7ecf\u5e38\u9047\u5230\u9700\u8981\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u7279\u5b9a\u4f4d\u6570\u7684\u60c5\u51b5\u3002\u65e0\u8bba\u662f\u4e3a\u4e86\u663e\u793a\u66f4\u52a0\u53cb\u597d\u7684\u8f93\u51fa\uff0c\u8fd8\u662f\u4e3a\u4e86\u5728\u8ba1\u7b97\u4e2d\u4fdd\u8bc1\u7cbe\u5ea6\uff0c\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\u90fd\u662f\u975e\u5e38\u5fc5\u8981\u7684\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u8fd9\u51e0\u79cd\u65b9\u6cd5\u6765\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\uff0c\u5e76\u63a2\u8ba8\u5b83\u4eec\u5404\u81ea\u7684\u4f18\u7f3a\u70b9\u548c\u4f7f\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n

\n

\u4e00\u3001round()<\/code>\u51fd\u6570<\/h3>\n<\/p>\n

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\u5176\u8bed\u6cd5\u4e3a\uff1around(number, digits)<\/code>\uff0c\u5176\u4e2dnumber<\/code>\u662f\u9700\u8981\u56db\u820d\u4e94\u5165\u7684\u6570\uff0cdigits<\/code>\u662f\u9700\u8981\u4fdd\u7559\u7684\u5c0f\u6570\u4f4d\u6570\u3002<\/p>\n<\/p>\n

\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/p>\n

number = 3.14159<\/p>\n
rounded_number = round(number, 2)<\/p>\n
print(rounded_number)  # \u8f93\u51fa\uff1a3.14<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0<\/h4>\n<\/p>\n
round()<\/code>\u51fd\u6570\u975e\u5e38\u4fbf\u6377\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u65e5\u5e38\u7684\u56db\u820d\u4e94\u5165\u9700\u6c42\u3002\u5176\u4e3b\u8981\u4f18\u70b9\u662f\u6613\u4e8e\u4f7f\u7528\uff0c\u7f3a\u70b9\u662f\u5f53\u9700\u8981\u5904\u7406\u975e\u5e38\u7cbe\u786e\u7684\u6d6e\u70b9\u8fd0\u7b97\u65f6\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e00\u4e9b\u7cbe\u5ea6\u95ee\u9898\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/h3>\n<\/p>\n
Python\u63d0\u4f9b\u4e86\u51e0\u79cd\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u7684\u65b9\u6cd5\uff0c\u5176\u4e2d\u5305\u62ec\u767e\u5206\u53f7\u683c\u5f0f\u5316\u3001str.format()<\/code>\u65b9\u6cd5\u548cf-string\uff08Python 3.6+\uff09\u3002\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u5b57\u7b26\u4e32\u62fc\u63a5\uff0c\u8fd8\u53ef\u4ee5\u975e\u5e38\u65b9\u4fbf\u5730\u63a7\u5236\u6570\u503c\u7684\u663e\u793a\u683c\u5f0f\u3002<\/p>\n<\/p>\n
\u767e\u5206\u53f7\u683c\u5f0f\u5316<\/h4>\n<\/p>\n
number = 3.14159<\/p>\n
formatted_number = "%.2f" % number<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a3.14<\/p>\n
<\/code><\/pre>\n<\/p>\n
str.format()<\/code>\u65b9\u6cd5<\/h4>\n<\/p>\n
number = 3.14159<\/p>\n
formatted_number = "{:.2f}".format(number)<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a3.14<\/p>\n
<\/code><\/pre>\n<\/p>\n
f-string\uff08Python 3.6+\uff09<\/h4>\n<\/p>\n
number = 3.14159<\/p>\n
formatted_number = f"{number:.2f}"<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a3.14<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be6\u7ec6\u63cf\u8ff0<\/h4>\n<\/p>\n
\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u7684\u4e3b\u8981\u4f18\u70b9\u662f\u53ef\u4ee5\u7075\u6d3b\u5730\u63a7\u5236\u8f93\u51fa\u683c\u5f0f\uff0c\u5e76\u4e14\u4ee3\u7801\u53ef\u8bfb\u6027\u8f83\u9ad8\u3002\u5c24\u5176\u662ff-string\uff0c\u5728Python 3.6\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0c\u63d0\u4f9b\u4e86\u66f4\u7b80\u6d01\u7684\u8bed\u6cd5\u548c\u66f4\u9ad8\u7684\u6027\u80fd\u3002<\/p>\n<\/p>\n
\u4e09\u3001decimal<\/code>\u6a21\u5757<\/h3>\n<\/p>\n
\u5bf9\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u6d6e\u70b9\u6570\u8fd0\u7b97\u7684\u573a\u666f\uff0cdecimal<\/code>\u6a21\u5757\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002decimal<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u4e00\u4e2aDecimal<\/code>\u7c7b\u578b\uff0c\u7528\u4e8e\u8fdb\u884c\u5341\u8fdb\u5236\u6d6e\u70b9\u6570\u8fd0\u7b97\uff0c\u5e76\u4e14\u53ef\u4ee5\u7cbe\u786e\u63a7\u5236\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/p>\n
from decimal import Decimal, ROUND_HALF_UP<\/p>\n
number = Decimal("3.14159")<\/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
\u8be6\u7ec6\u63cf\u8ff0<\/h4>\n<\/p>\n
decimal<\/code>\u6a21\u5757\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u7684\u573a\u666f\uff0c\u6bd4\u5982\u91d1\u878d\u6570\u636e\u5904\u7406\u3002\u5176\u4e3b\u8981\u4f18\u70b9\u662f\u80fd\u591f\u7cbe\u786e\u63a7\u5236\u8ba1\u7b97\u7cbe\u5ea6\uff0c\u7f3a\u70b9\u662f\u4f7f\u7528\u8d77\u6765\u76f8\u5bf9\u590d\u6742\uff0c\u6027\u80fd\u6bd4\u5185\u7f6e\u7684\u6d6e\u70b9\u6570\u8fd0\u7b97\u7a0d\u5dee\u3002<\/p>\n<\/p>\n
\n
\u56db\u3001\u6bd4\u8f83\u4e0e\u9009\u62e9<\/h3>\n<\/p>\n
\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\u56db\u820d\u4e94\u5165\uff0cround()<\/code>\u51fd\u6570\u8db3\u591f\uff1b\u5982\u679c\u9700\u8981\u683c\u5f0f\u5316\u8f93\u51fa\uff0c\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u66f4\u5408\u9002\uff1b\u5982\u679c\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\uff0cdecimal<\/code>\u6a21\u5757\u662f\u6700\u4f73\u9009\u62e9\u3002<\/strong><\/p>\n<\/p>\n
\u6027\u80fd\u6bd4\u8f83<\/h4>\n<\/p>\n
\u5728\u6027\u80fd\u65b9\u9762\uff0cround()<\/code>\u51fd\u6570\u548c\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u901a\u5e38\u6bd4decimal<\/code>\u6a21\u5757\u66f4\u5feb\u3002\u4f46\u662f\uff0c\u5982\u679c\u5bf9\u8ba1\u7b97\u7cbe\u5ea6\u6709\u4e25\u683c\u8981\u6c42\uff0cdecimal<\/code>\u6a21\u5757\u7684\u989d\u5916\u5f00\u9500\u662f\u503c\u5f97\u7684\u3002<\/p>\n<\/p>\n
\u5b9e\u9645\u5e94\u7528\u573a\u666f<\/h4>\n<\/p>\n
    \n
  1. \u65e5\u5e38\u8ba1\u7b97<\/strong>\uff1around()<\/code>\u51fd\u6570<\/li>\n
  2. \u683c\u5f0f\u5316\u8f93\u51fa<\/strong>\uff1a\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5<\/li>\n
  3. \u9ad8\u7cbe\u5ea6\u8ba1\u7b97<\/strong>\uff1adecimal<\/code>\u6a21\u5757<\/li>\n<\/ol>\n
    \u4e94\u3001\u4ee3\u7801\u793a\u4f8b<\/h3>\n<\/p>\n
    \u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3\u8fd9\u4e9b\u65b9\u6cd5\u7684\u4f7f\u7528\u573a\u666f\u548c\u6548\u679c\uff0c\u4e0b\u9762\u63d0\u4f9b\u4e00\u4e9b\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<\/p>\n
    \u793a\u4f8b1\uff1a\u4f7f\u7528round()<\/code>\u51fd\u6570\u8fdb\u884c\u7b80\u5355\u7684\u56db\u820d\u4e94\u5165<\/h4>\n<\/p>\n
    numbers = [3.14159, 2.71828, 1.61803]<\/p>\n
    rounded_numbers = [round(number, 2) for number in numbers]<\/p>\n
    print(rounded_numbers)  # \u8f93\u51fa\uff1a[3.14, 2.72, 1.62]<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u793a\u4f8b2\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u8f93\u51fa\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570<\/h4>\n<\/p>\n
    numbers = [3.14159, 2.71828, 1.61803]<\/p>\n
    formatted_numbers = [f"{number:.2f}" for number in numbers]<\/p>\n
    print(formatted_numbers)  # \u8f93\u51fa\uff1a['3.14', '2.72', '1.62']<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u793a\u4f8b3\uff1a\u4f7f\u7528decimal<\/code>\u6a21\u5757\u8fdb\u884c\u9ad8\u7cbe\u5ea6\u8ba1\u7b97<\/h4>\n<\/p>\n
    from decimal import Decimal, ROUND_HALF_UP<\/p>\n
    numbers = [Decimal("3.14159"), Decimal("2.71828"), Decimal("1.61803")]<\/p>\n
    rounded_numbers = [number.quantize(Decimal("0.00"), rounding=ROUND_HALF_UP) for number in numbers]<\/p>\n
    print(rounded_numbers)  # \u8f93\u51fa\uff1a[Decimal('3.14'), Decimal('2.72'), Decimal('1.62')]<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u516d\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
    \u5728Python\u4e2d\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u9009\u62e9\u3002round()<\/code>\u51fd\u6570\u9002\u7528\u4e8e\u7b80\u5355\u7684\u56db\u820d\u4e94\u5165\uff0c\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u683c\u5f0f\u5316\u8f93\u51fa\u7684\u573a\u666f\uff0c\u800cdecimal<\/code>\u6a21\u5757\u5219\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u7684\u573a\u5408\u3002<\/strong>\u4e86\u89e3\u8fd9\u4e9b\u65b9\u6cd5\u7684\u4f18\u7f3a\u70b9\u548c\u9002\u7528\u573a\u666f\uff0c\u53ef\u4ee5\u5e2e\u52a9\u4f60\u5728\u7f16\u7a0b\u4e2d\u66f4\u52a0\u7075\u6d3b\u5730\u5904\u7406\u6d6e\u70b9\u6570\u8fd0\u7b97\u3002<\/p>\n<\/p>\n
    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
     \u5982\u4f55\u5728Python\u4e2d\u683c\u5f0f\u5316\u6d6e\u70b9\u6570\u4ee5\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff1f<\/strong>
    \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u7684\u65b9\u6cd5\u6765\u4fdd\u7559\u6d6e\u70b9\u6570\u7684\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u3002\u5e38\u7528\u7684\u65b9\u5f0f\u6709\u4f7f\u7528format()<\/code>\u51fd\u6570\u6216f-string\uff08Python 3.6\u53ca\u4ee5\u4e0a\u7248\u672c\uff09\u3002\u4f8b\u5982\uff0c"{:.2f}".format(3.14159)<\/code>\u6216f"{3.14159:.2f}"<\/code>\u90fd\u4f1a\u8fd4\u56de\u5b57\u7b26\u4e32'3.14'\uff0c\u786e\u4fdd\u7ed3\u679c\u4ec5\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u3002<\/p>\n
    \u5728Python\u4e2d\uff0c\u5982\u4f55\u5bf9\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u6d6e\u70b9\u6570\u8fdb\u884c\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u5904\u7406\uff1f<\/strong>
    \u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u7ed3\u5408round()<\/code>\u51fd\u6570\u6765\u5bf9\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u6d6e\u70b9\u6570\u8fdb\u884c\u5904\u7406\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u6d6e\u70b9\u6570\u5217\u8868numbers = [1.12345, 2.67891, 3.14159]<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528rounded_numbers = [round(num, 2) for num in numbers]<\/code>\u6765\u751f\u6210\u4e00\u4e2a\u65b0\u5217\u8868[1.12, 2.68, 3.14]<\/code>\uff0c\u5176\u4e2d\u6bcf\u4e2a\u6570\u90fd\u4fdd\u7559\u4e86\u4e24\u4f4d\u5c0f\u6570\u3002<\/p>\n
    \u5728Python\u4e2d\uff0c\u5982\u4f55\u786e\u4fdd\u8f93\u51fa\u7ed3\u679c\u7684\u6d6e\u70b9\u6570\u59cb\u7ec8\u663e\u793a\u4e24\u4f4d\u5c0f\u6570\uff0c\u5373\u4f7f\u5b83\u4eec\u662f\u6574\u6570\uff1f<\/strong>
    \u53ef\u4ee5\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u6765\u786e\u4fdd\u5373\u4f7f\u662f\u6574\u6570\u4e5f\u4f1a\u663e\u793a\u4e24\u4f4d\u5c0f\u6570\u3002\u4f8b\u5982\uff0c\u4f7f\u7528"{:.2f}".format(5)<\/code>\u6216f"{5:.2f}"<\/code>\u4f1a\u8f93\u51fa'5.00'\u3002\u8fd9\u79cd\u65b9\u6cd5\u5728\u5904\u7406\u9700\u8981\u4fdd\u6301\u4e00\u81f4\u683c\u5f0f\u7684\u8f93\u51fa\u65f6\u975e\u5e38\u6709\u7528\uff0c\u7279\u522b\u662f\u5728\u751f\u6210\u62a5\u544a\u6216\u7528\u6237\u754c\u9762\u65f6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4f7f\u7528Python\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u51e0\u79cd\u65b9\u6cd5\u5305\u62ec\uff1around()\u51fd\u6570\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001decimal\u6a21\u5757\u3002 \u5728Py […]","protected":false},"author":3,"featured_media":1134539,"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\/1134529"}],"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=1134529"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1134529\/revisions"}],"predecessor-version":[{"id":1134543,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1134529\/revisions\/1134543"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1134539"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1134529"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1134529"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1134529"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}