{"id":998268,"date":"2024-12-27T09:31:24","date_gmt":"2024-12-27T01:31:24","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/998268.html"},"modified":"2024-12-27T09:31:27","modified_gmt":"2024-12-27T01:31:27","slug":"python%e5%a6%82%e4%bd%95%e8%a1%a8%e7%a4%ba%e6%a0%bc%e5%bc%8f%e6%a1%86%e6%9e%b6","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/998268.html","title":{"rendered":"python\u5982\u4f55\u8868\u793a\u683c\u5f0f\u6846\u67b6"},"content":{"rendered":"

\"python\u5982\u4f55\u8868\u793a\u683c\u5f0f\u6846\u67b6\"<\/p>\n

\u5728Python\u4e2d\uff0c\u8868\u793a\u683c\u5f0f\u6846\u67b6\u53ef\u4ee5\u4f7f\u7528f-strings\u3001str.format()\u65b9\u6cd5\u3001\u767e\u5206\u53f7\uff08%\uff09\u683c\u5f0f\u5316\u7b49\u3002\u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u4f18\u7f3a\u70b9\uff0c\u5176\u4e2df-strings\u88ab\u8ba4\u4e3a\u662f\u6700\u7b80\u6d01\u548c\u73b0\u4ee3\u7684\u65b9\u6cd5\u3002<\/strong>f-strings\u5141\u8bb8\u5728\u5b57\u7b26\u4e32\u4e2d\u5d4c\u5165\u8868\u8fbe\u5f0f\uff0c\u901a\u8fc7\u5728\u5b57\u7b26\u4e32\u524d\u52a0\u4e0a\u5b57\u6bcdf<\/code>\u5e76\u4f7f\u7528\u5927\u62ec\u53f7{}<\/code>\u6765\u5305\u542b\u53d8\u91cf\u6216\u8868\u8fbe\u5f0f\uff0c\u4f7f\u7528\u7b80\u5355\u3001\u76f4\u89c2\u3002\u6b64\u5916\uff0cf-strings\u8fd8\u652f\u6301\u66f4\u590d\u6742\u7684\u8868\u8fbe\u5f0f\u548c\u683c\u5f0f\u5316\u9009\u9879\uff0c\u6781\u5927\u5730\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027\u3002<\/p>\n<\/p>\n

\u4e00\u3001F-STRINGS<\/h4>\n<\/p>\n

F-strings\u662fPython 3.6\u5f15\u5165\u7684\u4e00\u79cd\u65b0\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u3002\u76f8\u5bf9\u4e8e\u5176\u4ed6\u683c\u5f0f\u5316\u65b9\u6cd5\uff0cf-strings\u66f4\u52a0\u7b80\u6d01\u548c\u76f4\u89c2\u3002f-strings\u901a\u8fc7\u5728\u5b57\u7b26\u4e32\u524d\u52a0\u4e0a\u5b57\u6bcdf<\/code>\u5e76\u4f7f\u7528\u5927\u62ec\u53f7{}<\/code>\u6765\u5305\u542b\u53d8\u91cf\u6216\u8868\u8fbe\u5f0f\u3002\u53ef\u4ee5\u8bf4\uff0cf-strings\u662fPython\u4e2d\u6700\u5f3a\u5927\u548c\u7075\u6d3b\u7684\u683c\u5f0f\u5316\u65b9\u5f0f\u4e4b\u4e00\u3002<\/p>\n<\/p>\n

1. \u57fa\u672c\u7528\u6cd5<\/strong><\/p>\n<\/p>\n

\u5728f-strings\u4e2d\uff0c\u4efb\u4f55\u5728\u5927\u62ec\u53f7\u5185\u7684Python\u8868\u8fbe\u5f0f\u90fd\u4f1a\u88ab\u6c42\u503c\u5e76\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n

name = "Alice"<\/p>\n
age = 30<\/p>\n
formatted_string = f"My name is {name} and I am {age} years old."<\/p>\n
print(formatted_string)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6b64\u4ee3\u7801\u4f1a\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
My name is Alice and I am 30 years old.<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u8868\u8fbe\u5f0f\u7684\u652f\u6301<\/strong><\/p>\n<\/p>\n
f-strings\u4e0d\u4ec5\u53ef\u4ee5\u5305\u542b\u7b80\u5355\u7684\u53d8\u91cf\uff0c\u8fd8\u53ef\u4ee5\u5305\u542b\u66f4\u590d\u6742\u7684\u8868\u8fbe\u5f0f\uff1a<\/p>\n<\/p>\n
value = 10<\/p>\n
formatted_string = f"Five times ten is {5 * value}."<\/p>\n
print(formatted_string)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
Five times ten is 50.<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. \u683c\u5f0f\u5316\u9009\u9879<\/strong><\/p>\n<\/p>\n
\u53ef\u4ee5\u5728f-strings\u4e2d\u4f7f\u7528\u683c\u5f0f\u5316\u9009\u9879\u6765\u6307\u5b9a\u6570\u5b57\u7684\u663e\u793a\u65b9\u5f0f\uff0c\u4f8b\u5982\u5c0f\u6570\u70b9\u540e\u51e0\u4f4d\u7b49\uff1a<\/p>\n<\/p>\n
number = 3.14159<\/p>\n
formatted_string = f"Pi is approximately {number:.2f}."<\/p>\n
print(formatted_string)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
Pi is approximately 3.14.<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001STR.FORMAT() \u65b9\u6cd5<\/h4>\n<\/p>\n
\u5728Python 3\u4e4b\u524d\uff0cstr.format()\u65b9\u6cd5\u662f\u6700\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u4f7f\u7528\u82b1\u62ec\u53f7{}<\/code>\u4f5c\u4e3a\u5360\u4f4d\u7b26\uff0c\u5e76\u901a\u8fc7\u8c03\u7528\u5b57\u7b26\u4e32\u7684format()\u65b9\u6cd5\u586b\u5145\u8fd9\u4e9b\u5360\u4f4d\u7b26\u3002<\/p>\n<\/p>\n
1. \u57fa\u672c\u7528\u6cd5<\/strong><\/p>\n<\/p>\n
name = "Bob"<\/p>\n
age = 25<\/p>\n
formatted_string = "My name is {} and I am {} years old.".format(name, age)<\/p>\n
print(formatted_string)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
My name is Bob and I am 25 years old.<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u6307\u5b9a\u4f4d\u7f6e<\/strong><\/p>\n<\/p>\n
\u53ef\u4ee5\u901a\u8fc7\u5728\u82b1\u62ec\u53f7\u5185\u6307\u5b9a\u7d22\u5f15\u503c\u6765\u63a7\u5236\u53c2\u6570\u7684\u63d2\u5165\u987a\u5e8f\uff1a<\/p>\n<\/p>\n
formatted_string = "My name is {1} and I am {0} years old.".format(age, name)<\/p>\n
print(formatted_string)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
My name is Bob and I am 25 years old.<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. \u547d\u540d\u53c2\u6570<\/strong><\/p>\n<\/p>\n
str.format()\u8fd8\u652f\u6301\u547d\u540d\u53c2\u6570\uff0c\u8fd9\u4f7f\u5f97\u6a21\u677f\u5b57\u7b26\u4e32\u66f4\u5177\u53ef\u8bfb\u6027\uff1a<\/p>\n<\/p>\n
formatted_string = "My name is {name} and I am {age} years old.".format(name="Charlie", age=35)<\/p>\n
print(formatted_string)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
My name is Charlie and I am 35 years old.<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u767e\u5206\u53f7\uff08%\uff09\u683c\u5f0f\u5316<\/h4>\n<\/p>\n
\u767e\u5206\u53f7\uff08%\uff09\u683c\u5f0f\u5316\u662fPython\u4e2d\u6700\u53e4\u8001\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u5f0f\uff0c\u7c7b\u4f3c\u4e8eC\u8bed\u8a00\u4e2d\u7684printf\u8bed\u53e5\u3002\u867d\u7136\u4e0d\u5982f-strings\u548cstr.format()\u90a3\u4e48\u73b0\u4ee3\uff0c\u4f46\u5728\u67d0\u4e9b\u7b80\u5355\u7684\u573a\u5408\u4ecd\u7136\u6709\u6548\u3002<\/p>\n<\/p>\n
1. \u57fa\u672c\u7528\u6cd5<\/strong><\/p>\n<\/p>\n
name = "David"<\/p>\n
age = 40<\/p>\n
formatted_string = "My name is %s and I am %d years old." % (name, age)<\/p>\n
print(formatted_string)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
My name is David and I am 40 years old.<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u683c\u5f0f\u5316\u9009\u9879<\/strong><\/p>\n<\/p>\n
\u548cf-strings\u4e00\u6837\uff0c\u767e\u5206\u53f7\u683c\u5f0f\u5316\u4e5f\u652f\u6301\u683c\u5f0f\u5316\u9009\u9879\uff0c\u4f8b\u5982\u6d6e\u70b9\u6570\u7684\u7cbe\u5ea6\uff1a<\/p>\n<\/p>\n
number = 3.14159<\/p>\n
formatted_string = "Pi is approximately %.2f." % number<\/p>\n
print(formatted_string)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
Pi is approximately 3.14.<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u9009\u62e9\u5408\u9002\u7684\u683c\u5f0f\u5316\u65b9\u5f0f<\/h4>\n<\/p>\n
\u5728\u9009\u62e9\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u65f6\uff0c\u5e94\u8be5\u8003\u8651\u4ee5\u4e0b\u51e0\u4e2a\u56e0\u7d20\uff1a<\/p>\n<\/p>\n
1. \u53ef\u8bfb\u6027<\/strong><\/p>\n<\/p>\n
f-strings\u63d0\u4f9b\u4e86\u6700\u9ad8\u7684\u53ef\u8bfb\u6027\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u5d4c\u5165\u591a\u4e2a\u53d8\u91cf\u6216\u590d\u6742\u8868\u8fbe\u5f0f\u65f6\u3002\u5b83\u4eec\u7684\u8bed\u6cd5\u7b80\u5355\u660e\u4e86\uff0c\u4f7f\u5f97\u4ee3\u7801\u6613\u4e8e\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/p>\n<\/p>\n
2. \u517c\u5bb9\u6027<\/strong><\/p>\n<\/p>\n
\u5982\u679c\u9700\u8981\u652f\u6301Python 3.6\u4e4b\u524d\u7684\u7248\u672c\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528str.format()\u6216\u767e\u5206\u53f7\u683c\u5f0f\u5316\u3002f-strings\u4ec5\u5728Python 3.6\u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\u53ef\u7528\u3002<\/p>\n<\/p>\n
3. \u529f\u80fd\u9700\u6c42<\/strong><\/p>\n<\/p>\n
f-strings\u548cstr.format()\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u683c\u5f0f\u5316\u9009\u9879\u548c\u7075\u6d3b\u6027\u3002\u5982\u679c\u9700\u8981\u590d\u6742\u7684\u683c\u5f0f\u5316\uff0c\u5e94\u8be5\u4f18\u5148\u8003\u8651\u8fd9\u4e24\u8005\u4e2d\u7684\u4e00\u79cd\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u7684\u5e94\u7528\u573a\u666f<\/h4>\n<\/p>\n
\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u5728Python\u4e2d\u6709\u7740\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u5e94\u7528\u573a\u666f\uff1a<\/p>\n<\/p>\n
1. \u65e5\u5fd7\u8bb0\u5f55<\/strong><\/p>\n<\/p>\n
\u5728\u8bb0\u5f55\u65e5\u5fd7\u65f6\uff0c\u9700\u8981\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u4ee5\u5305\u542b\u65f6\u95f4\u6233\u3001\u65e5\u5fd7\u7ea7\u522b\u3001\u6d88\u606f\u7b49\u4fe1\u606f\u3002f-strings\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u8fd9\u4e00\u70b9\uff1a<\/p>\n<\/p>\n
import datetime<\/p>\n
level = "INFO"<\/p>\n
message = "This is a log message."<\/p>\n
time = datetime.datetime.now()<\/p>\n
log = f"[{time}] {level}: {message}"<\/p>\n
print(log)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
[2023-10-25 12:00:00.000000] INFO: This is a log message.<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. \u6570\u636e\u62a5\u8868<\/strong><\/p>\n<\/p>\n
\u5728\u751f\u6210\u6570\u636e\u62a5\u8868\u65f6\uff0c\u9700\u8981\u683c\u5f0f\u5316\u6570\u5b57\u4ee5\u4fbf\u4e8e\u9605\u8bfb\uff0c\u4f8b\u5982\u663e\u793a\u4e24\u4f4d\u5c0f\u6570\u6216\u6dfb\u52a0\u5343\u4f4d\u5206\u9694\u7b26\uff1a<\/p>\n<\/p>\n
total_sales = 1234567.89<\/p>\n
report = f"Total sales: ${total_sales:,.2f}"<\/p>\n
print(report)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
Total sales: $1,234,567.89<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. \u52a8\u6001\u751f\u6210\u7684\u6587\u4ef6\u540d<\/strong><\/p>\n<\/p>\n
\u5728\u7a0b\u5e8f\u4e2d\u81ea\u52a8\u751f\u6210\u6587\u4ef6\u540d\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u6765\u5305\u542b\u65f6\u95f4\u6233\u6216\u5176\u4ed6\u4fe1\u606f\uff1a<\/p>\n<\/p>\n
filename = f"report_{datetime.datetime.now():%Y%m%d_%H%M%S}.txt"<\/p>\n
print(filename)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8f93\u51fa\uff1a<\/p>\n<\/p>\n
report_20231025_120000.txt<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u516d\u3001\u603b\u7ed3<\/h4>\n<\/p>\n
Python\u63d0\u4f9b\u4e86\u591a\u79cd\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u5305\u62ecf-strings\u3001str.format()\u548c\u767e\u5206\u53f7\u683c\u5f0f\u5316\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u4f18\u7f3a\u70b9\uff0c\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u3002f-strings\u7531\u4e8e\u5176\u7b80\u6d01\u6027\u548c\u7075\u6d3b\u6027\uff0c\u6210\u4e3a\u73b0\u4ee3Python\u4ee3\u7801\u4e2d\u6700\u63a8\u8350\u7684\u683c\u5f0f\u5316\u65b9\u6cd5\u3002\u5728\u9009\u62e9\u683c\u5f0f\u5316\u65b9\u6cd5\u65f6\uff0c\u5e94\u6839\u636e\u9879\u76ee\u7684Python\u7248\u672c\u3001\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u529f\u80fd\u9700\u6c42\u8fdb\u884c\u6743\u8861\u3002\u65e0\u8bba\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\uff0c\u638c\u63e1\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u7684\u6280\u5de7\u90fd\u5c06\u6781\u5927\u63d0\u9ad8\u4ee3\u7801\u7684\u8d28\u91cf\u548c\u6548\u7387\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 Python\u4e2d\u5e38\u7528\u7684\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u65b9\u5f0f\u6709\u54ea\u4e9b\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u4e3b\u8981\u6709\u4e09\u79cd\u65b9\u5f0f\uff1a\u4f7f\u7528\u767e\u5206\u53f7\uff08%\uff09\u64cd\u4f5c\u7b26\u3001\u4f7f\u7528str.format()\u65b9\u6cd5\u548c\u4f7f\u7528f-strings\uff08\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\uff09\u3002\u6bcf\u79cd\u65b9\u5f0f\u90fd\u6709\u5176\u72ec\u7279\u7684\u4f18\u70b9\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u5f0f\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027\u3002\u767e\u5206\u53f7\u64cd\u4f5c\u7b26\u76f8\u5bf9\u4f20\u7edf\u4f46\u53ef\u80fd\u4e0d\u5982\u5176\u4ed6\u65b9\u6cd5\u7075\u6d3b\uff1bstr.format()\u65b9\u6cd5\u63d0\u4f9b\u4e86\u66f4\u5f3a\u7684\u683c\u5f0f\u63a7\u5236\uff0c\u800cf-strings\u5219\u7ed3\u5408\u4e86\u7b80\u6d01\u6027\u548c\u6027\u80fd\uff0c\u63a8\u8350\u5728Python 3.6\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\u4f7f\u7528\u3002<\/p>\n
\u5982\u4f55\u5728Python\u4e2d\u683c\u5f0f\u5316\u6570\u5b57\u548c\u65e5\u671f\uff1f<\/strong>
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