{"id":1137890,"date":"2025-01-08T21:53:46","date_gmt":"2025-01-08T13:53:46","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1137890.html"},"modified":"2025-01-08T21:53:49","modified_gmt":"2025-01-08T13:53:49","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e5%8e%bb%e6%8e%89%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\/ask-ask\/1137890.html","title":{"rendered":"python\u4e2d\u5982\u4f55\u53bb\u6389\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d"},"content":{"rendered":"

\"python\u4e2d\u5982\u4f55\u53bb\u6389\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\"<\/p>\n

\u5728Python\u4e2d\u53bb\u6389\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u4e3b\u8981\u5305\u62ec\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001\u4f7f\u7528round\u51fd\u6570\u3001\u4f7f\u7528\u6574\u6570\u8fd0\u7b97\u3001\u5229\u7528Decimal\u6a21\u5757\u3002<\/strong> <\/p>\n<\/p>\n

\u5176\u4e2d\uff0c\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/strong>\u662f\u6700\u7075\u6d3b\u548c\u5e38\u7528\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u5b83\u4e0d\u4ec5\u53ef\u4ee5\u63a7\u5236\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\uff0c\u8fd8\u53ef\u4ee5\u8fdb\u884c\u66f4\u591a\u7684\u683c\u5f0f\u8bbe\u7f6e\u3002\u5177\u4f53\u5b9e\u73b0\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n

number = 123.456<\/p>\n
formatted_number = "{:.2f}".format(number)<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a123.46<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u5c06\u6d6e\u70b9\u6570\u8f6c\u6362\u4e3a\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u5b57\u7b26\u4e32\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528round()<\/code>\u51fd\u6570\u6765\u8fdb\u884c\u56db\u820d\u4e94\u5165\u64cd\u4f5c\uff1a<\/p>\n<\/p>\n
number = 123.456<\/p>\n
rounded_number = round(number, 2)<\/p>\n
print(rounded_number)  # \u8f93\u51fa\uff1a123.46<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u8fd9\u4e9b\u65b9\u6cd5\u53ca\u5176\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u7684\u5e94\u7528\u3002<\/p>\n<\/p>\n
\u4e00\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/strong>\u662fPython\u4e2d\u5904\u7406\u6d6e\u70b9\u6570\u6700\u7075\u6d3b\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u4e0d\u540c\u7684\u683c\u5f0f\u5316\u65b9\u5f0f\u6765\u63a7\u5236\u8f93\u51fa\u7684\u7cbe\u5ea6\u548c\u6837\u5f0f\u3002<\/p>\n<\/p>\n
1.1 \u4f7f\u7528format<\/code>\u51fd\u6570<\/h4>\n<\/p>\n
format<\/code>\u51fd\u6570\u662f\u4e00\u79cd\u66f4\u73b0\u4ee3\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u53ef\u4ee5\u66f4\u7075\u6d3b\u5730\u63a7\u5236\u8f93\u51fa\u683c\u5f0f\u3002<\/p>\n<\/p>\n
number = 123.456<\/p>\n
formatted_number = "{:.2f}".format(number)<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a123.46<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c{:.2f}<\/code>\u8868\u793a\u5c06\u6d6e\u70b9\u6570\u683c\u5f0f\u5316\u4e3a\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
1.2 \u4f7f\u7528f-string<\/code>\uff08Python 3.6+\uff09<\/h4>\n<\/p>\n
f-string<\/code>\u662fPython 3.6\u4e2d\u5f15\u5165\u7684\u4e00\u79cd\u65b0\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u5b83\u7684\u8bed\u6cd5\u66f4\u52a0\u7b80\u6d01\u548c\u76f4\u89c2\u3002<\/p>\n<\/p>\n
number = 123.456<\/p>\n
formatted_number = f"{number:.2f}"<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a123.46<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u7b80\u6d01\uff0c\u800c\u4e14\u5728\u5904\u7406\u590d\u6742\u7684\u683c\u5f0f\u5316\u9700\u6c42\u65f6\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528round<\/code>\u51fd\u6570<\/h3>\n<\/p>\n
round<\/code>\u51fd\u6570<\/strong>\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\u975e\u5e38\u7b80\u5355\u6613\u7528\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5b83\u8fd4\u56de\u7684\u662f\u6d6e\u70b9\u6570\u800c\u4e0d\u662f\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
number = 123.456<\/p>\n
rounded_number = round(number, 2)<\/p>\n
print(rounded_number)  # \u8f93\u51fa\uff1a123.46<\/p>\n
<\/code><\/pre>\n<\/p>\n
2.1 round<\/code>\u51fd\u6570\u7684\u5de5\u4f5c\u539f\u7406<\/h4>\n<\/p>\n
round<\/code>\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u5f85\u5904\u7406\u7684\u6d6e\u70b9\u6570\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u9700\u8981\u4fdd\u7559\u7684\u5c0f\u6570\u4f4d\u6570\u3002<\/p>\n<\/p>\n
number = 123.456789<\/p>\n
rounded_number = round(number, 4)<\/p>\n
print(rounded_number)  # \u8f93\u51fa\uff1a123.4568<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cround<\/code>\u51fd\u6570\u5c06number<\/code>\u56db\u820d\u4e94\u5165\u5230\u5c0f\u6570\u70b9\u540e\u56db\u4f4d\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u6574\u6570\u8fd0\u7b97<\/h3>\n<\/p>\n
\u6574\u6570\u8fd0\u7b97<\/strong>\u662f\u4e00\u79cd\u901a\u8fc7\u6570\u5b66\u64cd\u4f5c\u6765\u53bb\u6389\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u65b9\u6cd5\u3002\u5b83\u9002\u7528\u4e8e\u9700\u8981\u5bf9\u6d6e\u70b9\u6570\u8fdb\u884c\u622a\u65ad\u800c\u4e0d\u662f\u56db\u820d\u4e94\u5165\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
number = 123.456<\/p>\n
truncated_number = int(number * 100) \/ 100<\/p>\n
print(truncated_number)  # \u8f93\u51fa\uff1a123.45<\/p>\n
<\/code><\/pre>\n<\/p>\n
3.1 \u6574\u6570\u8fd0\u7b97\u7684\u5b9e\u73b0<\/h4>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5148\u5c06\u6d6e\u70b9\u6570\u4e58\u4ee5100\uff0c\u7136\u540e\u4f7f\u7528int<\/code>\u51fd\u6570\u622a\u65ad\u5c0f\u6570\u90e8\u5206\uff0c\u518d\u9664\u4ee5100\u6062\u590d\u539f\u6765\u7684\u6570\u91cf\u7ea7\u3002<\/p>\n<\/p>\n
number = 123.456789<\/p>\n
truncated_number = int(number * 1000) \/ 1000<\/p>\n
print(truncated_number)  # \u8f93\u51fa\uff1a123.456<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u9002\u5408\u9700\u8981\u7cbe\u786e\u63a7\u5236\u622a\u65ad\u4f4d\u7f6e\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528Decimal<\/code>\u6a21\u5757<\/h3>\n<\/p>\n
Decimal<\/code>\u6a21\u5757<\/strong>\u63d0\u4f9b\u4e86\u4e00\u4e2a\u66f4\u52a0\u7cbe\u786e\u548c\u7075\u6d3b\u7684\u6d6e\u70b9\u6570\u5904\u7406\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
from decimal import Decimal, ROUND_DOWN<\/p>\n
number = Decimal('123.456')<\/p>\n
formatted_number = number.quantize(Decimal('0.01'), rounding=ROUND_DOWN)<\/p>\n
print(formatted_number)  # \u8f93\u51fa\uff1a123.45<\/p>\n
<\/code><\/pre>\n<\/p>\n
4.1 Decimal<\/code>\u6a21\u5757\u7684\u4f18\u52bf<\/h4>\n<\/p>\n
Decimal<\/code>\u6a21\u5757\u4e0d\u4ec5\u53ef\u4ee5\u63a7\u5236\u5c0f\u6570\u70b9\u540e\u7684\u4f4d\u6570\uff0c\u8fd8\u53ef\u4ee5\u6307\u5b9a\u4e0d\u540c\u7684\u820d\u5165\u7b56\u7565\uff0c\u4f8b\u5982\uff1a\u5411\u4e0a\u53d6\u6574\u3001\u5411\u4e0b\u53d6\u6574\u3001\u56db\u820d\u4e94\u5165\u7b49\u3002<\/p>\n<\/p>\n
from decimal import Decimal, ROUND_HALF_UP<\/p>\n
number = Decimal('123.456')<\/p>\n
rounded_number = number.quantize(Decimal('0.01'), rounding=ROUND_HALF_UP)<\/p>\n
print(rounded_number)  # \u8f93\u51fa\uff1a123.46<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u8fdb\u884c\u9ad8\u7cbe\u5ea6\u548c\u590d\u6742\u820d\u5165\u64cd\u4f5c\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u5728Python\u4e2d\u53bb\u6389\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5177\u4f53\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u9700\u6c42\u548c\u573a\u666f\u3002\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/strong>\u63d0\u4f9b\u4e86\u6700\u5927\u7684\u7075\u6d3b\u6027\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u573a\u666f\uff1bround<\/code>\u51fd\u6570<\/strong>\u7b80\u5355\u6613\u7528\uff0c\u4f46\u4ec5\u9002\u7528\u4e8e\u56db\u820d\u4e94\u5165\u64cd\u4f5c\uff1b\u6574\u6570\u8fd0\u7b97<\/strong>\u9002\u7528\u4e8e\u9700\u8981\u622a\u65ad\u800c\u4e0d\u662f\u56db\u820d\u4e94\u5165\u7684\u573a\u666f\uff1bDecimal<\/code>\u6a21\u5757<\/strong>\u63d0\u4f9b\u4e86\u6700\u9ad8\u7684\u7cbe\u5ea6\u548c\u7075\u6d3b\u6027\uff0c\u9002\u7528\u4e8e\u9700\u8981\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u65e0\u8bba\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\uff0c\u90fd\u9700\u8981\u6839\u636e\u5177\u4f53\u9700\u6c42\u8fdb\u884c\u9009\u62e9\uff0c\u786e\u4fdd\u6700\u7ec8\u7ed3\u679c\u7b26\u5408\u9884\u671f\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u5904\u7406\u6d6e\u70b9\u6570\u4ee5\u53bb\u6389\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u5f0f\u5904\u7406\u6d6e\u70b9\u6570\u4ee5\u53bb\u6389\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u3002\u5e38\u89c1\u7684\u505a\u6cd5\u5305\u62ec\u4f7f\u7528\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3001round()<\/code>\u51fd\u6570\u6216math.floor()<\/code>\u7b49\u3002\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7f"{value:.2f}"<\/code>\u6765\u5b9e\u73b0\uff0c\u800cround(value, 2)<\/code>\u4f1a\u5c06\u6570\u5b57\u56db\u820d\u4e94\u5165\u5230\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u3002<\/p>\n
\u53bb\u6389\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u65f6\uff0c\u662f\u5426\u4f1a\u5f71\u54cd\u539f\u59cb\u6570\u636e\u7684\u7cbe\u5ea6\uff1f<\/strong>
\u4f7f\u7528round()<\/code>\u51fd\u6570\u4f1a\u5bf9\u539f\u59cb\u6570\u636e\u8fdb\u884c\u56db\u820d\u4e94\u5165\u64cd\u4f5c\uff0c\u56e0\u6b64\u53ef\u80fd\u4f1a\u5f71\u54cd\u6570\u636e\u7684\u7cbe\u5ea6\u3002\u5982\u679c\u9700\u8981\u4fdd\u7559\u539f\u59cb\u6570\u636e\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u540e\u8fdb\u884c\u663e\u793a\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u6539\u53d8\u6570\u503c\u3002<\/p>\n
\u6709\u54ea\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u5c06\u6d6e\u70b9\u6570\u8f6c\u6362\u4e3a\u6574\u6570\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528int()<\/code>\u51fd\u6570\u5c06\u6d6e\u70b9\u6570\u76f4\u63a5\u8f6c\u6362\u4e3a\u6574\u6570\uff0c\u8fd9\u4f1a\u53bb\u6389\u5c0f\u6570\u90e8\u5206\uff1b\u8fd8\u53ef\u4ee5\u4f7f\u7528math.floor()<\/code>\u6765\u5411\u4e0b\u53d6\u6574\uff0c\u6216\u8005math.ceil()<\/code>\u6765\u5411\u4e0a\u53d6\u6574\u3002\u9009\u62e9\u9002\u5408\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u4f60\u7684\u5177\u4f53\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u53bb\u6389\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u4e3b\u8981\u5305\u62ec\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001\u4f7f\u7528round\u51fd\u6570\u3001\u4f7f\u7528\u6574\u6570\u8fd0\u7b97\u3001\u5229 […]","protected":false},"author":3,"featured_media":1137898,"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\/1137890"}],"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=1137890"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1137890\/revisions"}],"predecessor-version":[{"id":1137900,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1137890\/revisions\/1137900"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1137898"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1137890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1137890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1137890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}