{"id":1066030,"date":"2024-12-31T16:22:37","date_gmt":"2024-12-31T08:22:37","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1066030.html"},"modified":"2024-12-31T16:22:41","modified_gmt":"2024-12-31T08:22:41","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e6%8f%90%e5%8f%96%e5%ad%97%e7%ac%a6%e4%b8%b2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1066030.html","title":{"rendered":"python\u4e2d\u5982\u4f55\u63d0\u53d6\u5b57\u7b26\u4e32"},"content":{"rendered":"

\"python\u4e2d\u5982\u4f55\u63d0\u53d6\u5b57\u7b26\u4e32\"<\/p>\n

\u5728Python\u4e2d\uff0c\u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u5e38\u89c1\u65b9\u6cd5\u6709\uff1a\u7d22\u5f15\u3001\u5207\u7247\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u3001\u5b57\u7b26\u4e32\u65b9\u6cd5\u3002\u7d22\u5f15\u53ef\u4ee5\u7528\u4e8e\u63d0\u53d6\u5355\u4e2a\u5b57\u7b26\uff0c\u5207\u7247\u7528\u4e8e\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u7528\u4e8e\u5339\u914d\u590d\u6742\u7684\u5b57\u7b26\u4e32\u6a21\u5f0f\uff0c\u5b57\u7b26\u4e32\u65b9\u6cd5\u63d0\u4f9b\u4e86\u591a\u79cd\u63d0\u53d6\u548c\u64cd\u4f5c\u5b57\u7b26\u4e32\u7684\u529f\u80fd\u3002<\/strong> \u5176\u4e2d\uff0c\u5207\u7247\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002<\/p>\n<\/p>\n

\u4f8b\u5982\uff0c\u4f7f\u7528\u7d22\u5f15\u548c\u5207\u7247\u53ef\u4ee5\u63d0\u53d6\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u90e8\u5206\u3002\u5047\u8bbe\u6709\u4e00\u4e2a\u5b57\u7b26\u4e32 s = "Hello, World!"<\/code>\uff0c\u901a\u8fc7 s[7]<\/code> \u53ef\u4ee5\u63d0\u53d6\u5230\u5355\u4e2a\u5b57\u7b26 W<\/code>\uff0c\u800c\u901a\u8fc7 s[0:5]<\/code> \u53ef\u4ee5\u63d0\u53d6\u5230\u5b50\u5b57\u7b26\u4e32 Hello<\/code>\u3002\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u76f4\u89c2\u548c\u9ad8\u6548\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u7b80\u5355\u7684\u5b57\u7b26\u4e32\u63d0\u53d6\u9700\u6c42\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u7d22\u5f15\u63d0\u53d6<\/h3>\n<\/p>\n

\u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u4e00\u4e2a\u5b57\u7b26\u5e8f\u5217\uff0c\u6bcf\u4e2a\u5b57\u7b26\u90fd\u6709\u4e00\u4e2a\u7d22\u5f15\uff08\u4ece0\u5f00\u59cb\uff09\u3002\u901a\u8fc7\u7d22\u5f15\uff0c\u6211\u4eec\u53ef\u4ee5\u63d0\u53d6\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e2a\u7279\u5b9a\u5b57\u7b26\u3002<\/p>\n<\/p>\n

\u4f8b\u5982\uff1a<\/p>\n<\/p>\n

s = "Hello, World!"<\/p>\n
first_char = s[0]  # H<\/p>\n
last_char = s[-1]  # !<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6b63\u7d22\u5f15\u4ece\u5de6\u81f3\u53f3\uff0c\u8d1f\u7d22\u5f15\u4ece\u53f3\u81f3\u5de6\u3002\u4f7f\u7528\u7d22\u5f15\u65b9\u6cd5\u53ef\u4ee5\u8fc5\u901f\u8bbf\u95ee\u5b57\u7b26\u4e32\u4e2d\u7684\u5355\u4e2a\u5b57\u7b26\uff0c\u975e\u5e38\u9002\u5408\u9700\u8981\u63d0\u53d6\u7279\u5b9a\u4f4d\u7f6e\u5b57\u7b26\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u5207\u7247\u63d0\u53d6<\/h3>\n<\/p>\n
\u5207\u7247\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5b57\u7b26\u4e32\u63d0\u53d6\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u5b50\u5b57\u7b26\u4e32\u3002\u5207\u7247\u7684\u57fa\u672c\u8bed\u6cd5\u662f s[start:stop:step]<\/code>\uff0c\u5176\u4e2d start<\/code> \u662f\u5f00\u59cb\u7d22\u5f15\uff0cstop<\/code> \u662f\u7ed3\u675f\u7d22\u5f15\uff08\u4e0d\u5305\u62ec\uff09\uff0cstep<\/code> \u662f\u6b65\u957f\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
substring = s[0:5]  # Hello<\/p>\n
substring_with_step = s[0:5:2]  # Hlo<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5207\u7247\u53ef\u4ee5\u7075\u6d3b\u5730\u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u4efb\u610f\u90e8\u5206\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u9700\u8981\u63d0\u53d6\u8fde\u7eed\u5b57\u7b26\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u53d6<\/h3>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\uff08Regular Expressions\uff09\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5b57\u7b26\u4e32\u5339\u914d\u5de5\u5177\uff0c\u9002\u7528\u4e8e\u590d\u6742\u6a21\u5f0f\u7684\u5b57\u7b26\u4e32\u63d0\u53d6\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
import re<\/p>\n
s = "The price is $123.45"<\/p>\n
match = re.search(r'\\$\\d+\\.\\d{2}', s)<\/p>\n
if match:<\/p>\n
    price = match.group()  # $123.45<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u5339\u914d\u4efb\u610f\u590d\u6742\u7684\u5b57\u7b26\u4e32\u6a21\u5f0f\uff0c\u5e76\u63d0\u53d6\u7b26\u5408\u6761\u4ef6\u7684\u5b50\u5b57\u7b26\u4e32\uff0c\u9002\u7528\u4e8e\u9700\u8981\u7075\u6d3b\u5339\u914d\u548c\u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5b57\u7b26\u4e32\u65b9\u6cd5\u63d0\u53d6<\/h3>\n<\/p>\n
Python\u7684\u5b57\u7b26\u4e32\u7c7b\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\uff0c\u7528\u4e8e\u63d0\u53d6\u548c\u64cd\u4f5c\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0csplit()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u6309\u5206\u9694\u7b26\u62c6\u5206\u6210\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32\uff0cfind()<\/code> \u548c index()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u627e\u5230\u5b50\u5b57\u7b26\u4e32\u7684\u4f4d\u7f6e\uff0cstrip()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u767d\u5b57\u7b26\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
words = s.split(", ")  # ['Hello', 'World!']<\/p>\n
index_of_w = s.find('W')  # 7<\/p>\n
stripped_s = s.strip('!')  # 'Hello, World'<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e9b\u65b9\u6cd5\u4e3a\u5b57\u7b26\u4e32\u5904\u7406\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u529f\u80fd\uff0c\u9002\u7528\u4e8e\u5404\u79cd\u5b57\u7b26\u4e32\u63d0\u53d6\u548c\u64cd\u4f5c\u9700\u6c42\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\uff08String Formatting\uff09\u662f\u4e00\u79cd\u5c06\u53d8\u91cf\u63d2\u5165\u5b57\u7b26\u4e32\u4e2d\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u683c\u5f0f\u5316\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u66f4\u7075\u6d3b\u7684\u5c55\u793a\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
name = "Alice"<\/p>\n
age = 30<\/p>\n
formatted_str = f"Name: {name}, Age: {age}"  # Name: Alice, Age: 30<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u548c\u5176\u4ed6\u53d8\u91cf\u7ec4\u5408\u6210\u65b0\u7684\u5b57\u7b26\u4e32\uff0c\u9002\u7528\u4e8e\u9700\u8981\u52a8\u6001\u751f\u6210\u5b57\u7b26\u4e32\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u516d\u3001\u5b57\u7b26\u4e32\u62fc\u63a5\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u62fc\u63a5\uff08String Concatenation\uff09\u662f\u4e00\u79cd\u5c06\u591a\u4e2a\u5b57\u7b26\u4e32\u5408\u5e76\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u62fc\u63a5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32\u7ec4\u5408\u6210\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s1 = "Hello"<\/p>\n
s2 = "World"<\/p>\n
combined_str = s1 + ", " + s2 + "!"  # Hello, World!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u62fc\u63a5\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32\u7ec4\u5408\u6210\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5408\u5e76\u591a\u4e2a\u5b57\u7b26\u4e32\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e03\u3001\u5b57\u7b26\u4e32\u66ff\u6362\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u66ff\u6362\uff08String Replacement\uff09\u662f\u4e00\u79cd\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e2a\u5b50\u5b57\u7b26\u4e32\u66ff\u6362\u6210\u53e6\u4e00\u4e2a\u5b50\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u66ff\u6362\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
new_str = s.replace('World', 'Python')  # Hello, Python!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u66ff\u6362\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u4fee\u6539\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u5c40\u90e8\u4fee\u6539\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u516b\u3001\u5b57\u7b26\u4e32\u7ffb\u8f6c\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u7ffb\u8f6c\uff08String Reversal\uff09\u662f\u4e00\u79cd\u5c06\u5b57\u7b26\u4e32\u6309\u5b57\u7b26\u987a\u5e8f\u5012\u8f6c\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u7ffb\u8f6c\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u9006\u5e8f\u5904\u7406\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
reversed_str = s[::-1]  # !dlroW ,olleH<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u7ffb\u8f6c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u9006\u5e8f\u5904\u7406\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u9006\u5e8f\u5904\u7406\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e5d\u3001\u5b57\u7b26\u4e32\u5927\u5c0f\u5199\u8f6c\u6362\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u5927\u5c0f\u5199\u8f6c\u6362\uff08String Case Conversion\uff09\u662f\u4e00\u79cd\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u6bcd\u5927\u5c0f\u5199\u8fdb\u884c\u8f6c\u6362\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u5927\u5c0f\u5199\u8f6c\u6362\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u5927\u5c0f\u5199\u53d8\u6362\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
upper_str = s.upper()  # HELLO, WORLD!<\/p>\n
lower_str = s.lower()  # hello, world!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u5927\u5c0f\u5199\u8f6c\u6362\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u5927\u5c0f\u5199\u53d8\u6362\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u5927\u5c0f\u5199\u53d8\u6362\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u5341\u3001\u5b57\u7b26\u4e32\u53bb\u9664\u7a7a\u767d\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u53bb\u9664\u7a7a\u767d\uff08String Trimming\uff09\u662f\u4e00\u79cd\u5c06\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u767d\u5b57\u7b26\u53bb\u9664\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u53bb\u9664\u7a7a\u767d\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u6e05\u7406\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s = "   Hello, World!   "<\/p>\n
trimmed_str = s.strip()  # Hello, World!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u53bb\u9664\u7a7a\u767d\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u6e05\u7406\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u6e05\u7406\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u5341\u4e00\u3001\u5b57\u7b26\u4e32\u5206\u5272\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u5206\u5272\uff08String Splitting\uff09\u662f\u4e00\u79cd\u5c06\u5b57\u7b26\u4e32\u6309\u5206\u9694\u7b26\u62c6\u5206\u6210\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u5206\u5272\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u5206\u89e3\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s = "apple,banana,cherry"<\/p>\n
fruits = s.split(",")  # ['apple', 'banana', 'cherry']<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u5206\u5272\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u5206\u89e3\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u5206\u89e3\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u5341\u4e8c\u3001\u5b57\u7b26\u4e32\u8fde\u63a5\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u8fde\u63a5\uff08String Joining\uff09\u662f\u4e00\u79cd\u5c06\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32\u6309\u5206\u9694\u7b26\u8fde\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u8fde\u63a5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32\u7ec4\u5408\u6210\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
fruits = ['apple', 'banana', 'cherry']<\/p>\n
s = ", ".join(fruits)  # apple, banana, cherry<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u8fde\u63a5\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32\u7ec4\u5408\u6210\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5c06\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32\u8fde\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u5341\u4e09\u3001\u5b57\u7b26\u4e32\u67e5\u627e\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u67e5\u627e\uff08String Searching\uff09\u662f\u4e00\u79cd\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u5b50\u5b57\u7b26\u4e32\u4f4d\u7f6e\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u67e5\u627e\uff0c\u53ef\u4ee5\u786e\u5b9a\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u5728\u539f\u5b57\u7b26\u4e32\u4e2d\u7684\u4f4d\u7f6e\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
position = s.find('World')  # 7<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u67e5\u627e\u65b9\u6cd5\uff0c\u53ef\u4ee5\u786e\u5b9a\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u5728\u539f\u5b57\u7b26\u4e32\u4e2d\u7684\u4f4d\u7f6e\uff0c\u9002\u7528\u4e8e\u9700\u8981\u67e5\u627e\u5b50\u5b57\u7b26\u4e32\u4f4d\u7f6e\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u5341\u56db\u3001\u5b57\u7b26\u4e32\u68c0\u67e5\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u68c0\u67e5\uff08String Checking\uff09\u662f\u4e00\u79cd\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u7b26\u5408\u67d0\u4e9b\u6761\u4ef6\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u68c0\u67e5\uff0c\u53ef\u4ee5\u786e\u5b9a\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u662f\u5426\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
is_alpha = s.isalpha()  # False<\/p>\n
is_digit = s.isdigit()  # False<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u68c0\u67e5\u65b9\u6cd5\uff0c\u53ef\u4ee5\u786e\u5b9a\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u662f\u5426\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u6761\u4ef6\u68c0\u67e5\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u5341\u4e94\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u63d0\u53d6<\/h3>\n<\/p>\n
\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\uff08String Formatting\uff09\u662f\u4e00\u79cd\u5c06\u53d8\u91cf\u63d2\u5165\u5b57\u7b26\u4e32\u4e2d\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u683c\u5f0f\u5316\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u8fdb\u884c\u66f4\u7075\u6d3b\u7684\u5c55\u793a\u3002<\/p>\n<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
name = "Alice"<\/p>\n
age = 30<\/p>\n
formatted_str = f"Name: {name}, Age: {age}"  # Name: Alice, Age: 30<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u63d0\u53d6\u5230\u7684\u5b50\u5b57\u7b26\u4e32\u548c\u5176\u4ed6\u53d8\u91cf\u7ec4\u5408\u6210\u65b0\u7684\u5b57\u7b26\u4e32\uff0c\u9002\u7528\u4e8e\u9700\u8981\u52a8\u6001\u751f\u6210\u5b57\u7b26\u4e32\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u603b\u7ed3\u8d77\u6765\uff0cPython\u4e2d\u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u975e\u5e38\u4e30\u5bcc\uff0c\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u9002\u7528\u7684\u573a\u666f\u548c\u4f18\u52bf\u3002\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u66f4\u52a0\u9ad8\u6548\u5730\u5904\u7406\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u63d0\u53d6\u7279\u5b9a\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5757re<\/code>\u6765\u63d0\u53d6\u7279\u5b9a\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\u3002\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u6a21\u5f0f\uff0c\u53ef\u4ee5\u7cbe\u786e\u5339\u914d\u5e76\u63d0\u53d6\u6240\u9700\u7684\u5b57\u7b26\u4e32\u90e8\u5206\u3002\u4f8b\u5982\uff0c\u4f7f\u7528re.findall()<\/code>\u51fd\u6570\u53ef\u4ee5\u4ece\u6587\u672c\u4e2d\u63d0\u53d6\u6240\u6709\u7b26\u5408\u6307\u5b9a\u6a21\u5f0f\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
\u6709\u6ca1\u6709\u7b80\u5355\u7684\u65b9\u6cd5\u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u5b50\u4e32\uff1f<\/strong>
Python\u7684\u5207\u7247\u529f\u80fd\u975e\u5e38\u5f3a\u5927\uff0c\u5141\u8bb8\u7528\u6237\u901a\u8fc7\u6307\u5b9a\u8d77\u59cb\u548c\u7ed3\u675f\u7d22\u5f15\u8f7b\u677e\u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u5b50\u4e32\u3002\u53ea\u9700\u4f7f\u7528string[start:end]<\/code>\u683c\u5f0f\u5373\u53ef\u83b7\u53d6\u6240\u9700\u7684\u90e8\u5206\u3002\u5982\u679c\u9700\u8981\u4ece\u5b57\u7b26\u4e32\u7684\u67d0\u4e00\u7279\u5b9a\u4f4d\u7f6e\u5f00\u59cb\u63d0\u53d6\uff0c\u7d22\u5f15\u53ef\u4ee5\u4e3a\u8d1f\u6570\uff0c\u4ece\u800c\u4ece\u5b57\u7b26\u4e32\u672b\u5c3e\u5f00\u59cb\u8ba1\u7b97\u3002<\/p>\n
\u5982\u4f55\u5904\u7406\u63d0\u53d6\u5b57\u7b26\u4e32\u540e\u7684\u7a7a\u683c\u548c\u7279\u6b8a\u5b57\u7b26\uff1f<\/strong>
\u5728\u63d0\u53d6\u5b57\u7b26\u4e32\u540e\uff0c\u4f7f\u7528strip()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u683c\u548c\u7279\u6b8a\u5b57\u7b26\u3002\u6b64\u5916\uff0c\u5982\u679c\u9700\u8981\u79fb\u9664\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u7a7a\u683c\uff0c\u53ef\u4ee5\u4f7f\u7528replace()<\/code>\u65b9\u6cd5\u5c06\u7a7a\u683c\u66ff\u6362\u4e3a\u7a7a\u5b57\u7b26\u3002\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u63d0\u53d6\u5230\u7684\u5b57\u7b26\u4e32\u6574\u6d01\u4e14\u7b26\u5408\u9884\u671f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u63d0\u53d6\u5b57\u7b26\u4e32\u7684\u5e38\u89c1\u65b9\u6cd5\u6709\uff1a\u7d22\u5f15\u3001\u5207\u7247\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u3001\u5b57\u7b26\u4e32\u65b9\u6cd5\u3002\u7d22\u5f15\u53ef\u4ee5\u7528\u4e8e\u63d0\u53d6\u5355\u4e2a\u5b57\u7b26\uff0c\u5207\u7247\u7528 […]","protected":false},"author":3,"featured_media":1066040,"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\/1066030"}],"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=1066030"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1066030\/revisions"}],"predecessor-version":[{"id":1066042,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1066030\/revisions\/1066042"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1066040"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1066030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1066030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1066030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}