{"id":1102562,"date":"2025-01-08T16:01:15","date_gmt":"2025-01-08T08:01:15","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1102562.html"},"modified":"2025-01-08T16:01:21","modified_gmt":"2025-01-08T08:01:21","slug":"python%e5%a6%82%e4%bd%95%e6%88%aa%e5%8f%96%e4%b8%80%e6%ae%b5%e5%ad%97%e7%ac%a6%e4%b8%b2-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1102562.html","title":{"rendered":"python\u5982\u4f55\u622a\u53d6\u4e00\u6bb5\u5b57\u7b26\u4e32"},"content":{"rendered":"

\"python\u5982\u4f55\u622a\u53d6\u4e00\u6bb5\u5b57\u7b26\u4e32\"<\/p>\n

Python\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u51e0\u79cd\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528\u5207\u7247\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u3001\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\u3002<\/strong>\u5176\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u662f\u4f7f\u7528\u5207\u7247\u3002\u5207\u7247\u662f\u4e00\u79cd\u975e\u5e38\u5f3a\u5927\u4e14\u7075\u6d3b\u7684\u64cd\u4f5c\u65b9\u5f0f\uff0c\u5b83\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u6765\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u5b50\u5b57\u7b26\u4e32\u3002\u63a5\u4e0b\u6765\u8be6\u7ec6\u63cf\u8ff0\u5176\u4e2d\u4e00\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528\u5207\u7247\u3002<\/p>\n<\/p>\n

\u4f7f\u7528\u5207\u7247\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\u975e\u5e38\u7b80\u5355\uff0c\u4f60\u53ea\u9700\u8981\u6307\u5b9a\u5f00\u59cb\u7d22\u5f15\u548c\u7ed3\u675f\u7d22\u5f15\uff0c\u5c31\u80fd\u8f7b\u677e\u83b7\u5f97\u6240\u9700\u7684\u5b50\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u4f60\u6709\u4e00\u4e2a\u5b57\u7b26\u4e32 s = "Hello, World!"<\/code>\uff0c\u4f60\u60f3\u8981\u622a\u53d6\u5176\u4e2d\u7684"World"\u90e8\u5206\uff0c\u53ef\u4ee5\u4f7f\u7528s[7:12]<\/code>\u6765\u5b9e\u73b0\u3002\u5176\u4e2d\uff0c7\u662f\u8d77\u59cb\u7d22\u5f15\uff0c12\u662f\u7ed3\u675f\u7d22\u5f15\uff08\u4e0d\u5305\u62ec12\u5bf9\u5e94\u7684\u5b57\u7b26\uff09\u3002<\/p>\n<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecdPython\u4e2d\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u51e0\u79cd\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u5207\u7247<\/h3>\n<\/p>\n

\u5207\u7247\uff08slice\uff09\u662f\u4e00\u79cd\u975e\u5e38\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u5f0f\uff0c\u5b83\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u7d22\u5f15\u8303\u56f4\u6765\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n

1. \u57fa\u672c\u5207\u7247\u64cd\u4f5c<\/h4>\n<\/p>\n

\u57fa\u672c\u5207\u7247\u64cd\u4f5c\u5305\u62ec\u6307\u5b9a\u5f00\u59cb\u7d22\u5f15\u548c\u7ed3\u675f\u7d22\u5f15\u3002<\/p>\n<\/p>\n

s = "Hello, World!"<\/p>\n
substring = s[7:12]<\/p>\n
print(substring)  # \u8f93\u51fa\uff1aWorld<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cs[7:12]<\/code>\u8868\u793a\u4ece\u7d22\u5f157\u5f00\u59cb\uff08\u5305\u62ec7\uff09\uff0c\u5230\u7d22\u5f1512\u7ed3\u675f\uff08\u4e0d\u5305\u62ec12\uff09\u7684\u5b57\u7b26\u3002<\/p>\n<\/p>\n
2. \u7701\u7565\u5f00\u59cb\u6216\u7ed3\u675f\u7d22\u5f15<\/h4>\n<\/p>\n
\u5982\u679c\u4f60\u7701\u7565\u5f00\u59cb\u7d22\u5f15\uff0c\u5207\u7247\u5c06\u4ece\u5b57\u7b26\u4e32\u7684\u5f00\u5934\u5f00\u59cb\uff1b\u5982\u679c\u4f60\u7701\u7565\u7ed3\u675f\u7d22\u5f15\uff0c\u5207\u7247\u5c06\u4e00\u76f4\u5230\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u3002<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
substring1 = s[:5]  # \u4ece\u5f00\u5934\u5230\u7d22\u5f155\uff08\u4e0d\u5305\u62ec5\uff09<\/p>\n
substring2 = s[7:]  # \u4ece\u7d22\u5f157\u5230\u672b\u5c3e<\/p>\n
print(substring1)  # \u8f93\u51fa\uff1aHello<\/p>\n
print(substring2)  # \u8f93\u51fa\uff1aWorld!<\/p>\n
<\/code><\/pre>\n<\/p>\n
3. \u6b65\u957f\u53c2\u6570<\/h4>\n<\/p>\n
\u5207\u7247\u64cd\u4f5c\u8fd8\u652f\u6301\u6b65\u957f\u53c2\u6570\uff0c\u5b83\u53ef\u4ee5\u6307\u5b9a\u6bcf\u9694\u591a\u5c11\u4e2a\u5b57\u7b26\u83b7\u53d6\u4e00\u6b21\u3002<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
substring = s[0:12:2]<\/p>\n
print(substring)  # \u8f93\u51fa\uff1aHlo ol<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cs[0:12:2]<\/code>\u8868\u793a\u4ece\u7d22\u5f150\u5f00\u59cb\uff0c\u6bcf\u96942\u4e2a\u5b57\u7b26\u83b7\u53d6\u4e00\u6b21\uff0c\u76f4\u5230\u7d22\u5f1512\u4e3a\u6b62\u3002<\/p>\n<\/p>\n
4. \u8d1f\u7d22\u5f15<\/h4>\n<\/p>\n
\u8d1f\u7d22\u5f15\u7528\u4e8e\u4ece\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u5f00\u59cb\u8ba1\u6570\uff0c-1\u8868\u793a\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\uff0c-2\u8868\u793a\u5012\u6570\u7b2c\u4e8c\u4e2a\u5b57\u7b26\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
substring = s[-6:-1]<\/p>\n
print(substring)  # \u8f93\u51fa\uff1aWorld<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cs[-6:-1]<\/code>\u8868\u793a\u4ece\u5012\u6570\u7b2c6\u4e2a\u5b57\u7b26\u5f00\u59cb\uff0c\u5230\u5012\u6570\u7b2c1\u4e2a\u5b57\u7b26\uff08\u4e0d\u5305\u62ec\uff09\u4e3a\u6b62\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5<\/h3>\n<\/p>\n
Python\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5185\u7f6e\u7684\u5b57\u7b26\u4e32\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7528\u4e8e\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
1. split()\u65b9\u6cd5<\/h4>\n<\/p>\n
split()<\/code>\u65b9\u6cd5\u6839\u636e\u6307\u5b9a\u7684\u5206\u9694\u7b26\u5c06\u5b57\u7b26\u4e32\u5206\u5272\u6210\u591a\u4e2a\u5b50\u5b57\u7b26\u4e32\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5217\u8868\u3002<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
parts = s.split(", ")<\/p>\n
print(parts)  # \u8f93\u51fa\uff1a['Hello', 'World!']<\/p>\n
<\/code><\/pre>\n<\/p>\n
2. partition()\u65b9\u6cd5<\/h4>\n<\/p>\n
partition()<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u5206\u5272\u6210\u4e09\u4e2a\u90e8\u5206\uff1a\u5206\u9694\u7b26\u524d\u7684\u90e8\u5206\u3001\u5206\u9694\u7b26\u672c\u8eab\u3001\u5206\u9694\u7b26\u540e\u7684\u90e8\u5206\u3002<\/p>\n<\/p>\n
s = "Hello, World!"<\/p>\n
before, sep, after = s.partition(", ")<\/p>\n
print(before)  # \u8f93\u51fa\uff1aHello<\/p>\n
print(sep)     # \u8f93\u51fa\uff1a,<\/p>\n
print(after)   # \u8f93\u51fa\uff1aWorld!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5b57\u7b26\u4e32\u5904\u7406\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4e8e\u590d\u6742\u7684\u5b57\u7b26\u4e32\u5339\u914d\u548c\u622a\u53d6\u3002<\/p>\n<\/p>\n
1. \u4f7f\u7528re\u6a21\u5757<\/h4>\n<\/p>\n
Python\u7684re<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86\u6b63\u5219\u8868\u8fbe\u5f0f\u76f8\u5173\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u7528\u4e8e\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
import re<\/p>\n
s = "Hello, World!"<\/p>\n
pattern = r"World"<\/p>\n
match = re.search(pattern, s)<\/p>\n
if match:<\/p>\n
    print(match.group())  # \u8f93\u51fa\uff1aWorld<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cre.search()<\/code>\u51fd\u6570\u7528\u4e8e\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u5339\u914d\u7684\u5b50\u5b57\u7b26\u4e32\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5339\u914d\u5bf9\u8c61\u3002\u5982\u679c\u5339\u914d\u6210\u529f\uff0c\u53ef\u4ee5\u4f7f\u7528group()<\/code>\u65b9\u6cd5\u83b7\u53d6\u5339\u914d\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
2. \u4f7f\u7528re.findall()\u65b9\u6cd5<\/h4>\n<\/p>\n
re.findall()<\/code>\u65b9\u6cd5\u8fd4\u56de\u6240\u6709\u5339\u914d\u7684\u5b50\u5b57\u7b26\u4e32\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u5217\u8868\u3002<\/p>\n<\/p>\n
import re<\/p>\n
s = "Hello, World! World is beautiful."<\/p>\n
pattern = r"World"<\/p>\n
matches = re.findall(pattern, s)<\/p>\n
print(matches)  # \u8f93\u51fa\uff1a['World', 'World']<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5<\/h3>\n<\/p>\n
\u6709\u65f6\u5019\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u62fc\u63a5\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
1. \u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\u64cd\u4f5c<\/h4>\n<\/p>\n
s = "Hello, World!"<\/p>\n
substring = s[:5] + s[7:]<\/p>\n
print(substring)  # \u8f93\u51fa\uff1aHelloWorld!<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7\u62fc\u63a5\u4e24\u4e2a\u5b50\u5b57\u7b26\u4e32Hello<\/code>\u548cWorld!<\/code>\u6765\u83b7\u5f97\u6240\u9700\u7684\u7ed3\u679c\u3002<\/p>\n<\/p>\n
\u7ed3\u8bba<\/h3>\n<\/p>\n
\u7efc\u4e0a\u6240\u8ff0\uff0cPython\u63d0\u4f9b\u4e86\u591a\u79cd\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u65b9\u6cd5\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u662f\u5207\u7247\u64cd\u4f5c\u3002\u5207\u7247\u64cd\u4f5c\u4e0d\u4ec5\u7b80\u5355\u6613\u7528\uff0c\u800c\u4e14\u529f\u80fd\u5f3a\u5927\uff0c\u80fd\u591f\u6ee1\u8db3\u7edd\u5927\u591a\u6570\u7684\u5b57\u7b26\u4e32\u622a\u53d6\u9700\u6c42\u3002\u6b64\u5916\uff0cPython\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5185\u7f6e\u7684\u5b57\u7b26\u4e32\u65b9\u6cd5\u548c\u6b63\u5219\u8868\u8fbe\u5f0f\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4e8e\u66f4\u590d\u6742\u7684\u5b57\u7b26\u4e32\u5904\u7406\u4efb\u52a1\u3002\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4ee3\u7801\u7684\u6548\u7387\u548c\u53ef\u8bfb\u6027\u3002\u5e0c\u671b\u8fd9\u7bc7\u6587\u7ae0\u80fd\u591f\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u548c\u638c\u63e1Python\u4e2d\u7684\u5b57\u7b26\u4e32\u622a\u53d6\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 Python\u4e2d\u53ef\u4ee5\u4f7f\u7528\u54ea\u4e9b\u65b9\u6cd5\u6765\u622a\u53d6\u5b57\u7b26\u4e32\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u622a\u53d6\u5b57\u7b26\u4e32\u3002\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u5207\u7247\uff08slice\uff09\u529f\u80fd\u3002\u901a\u8fc7\u6307\u5b9a\u8d77\u59cb\u548c\u7ed3\u675f\u7d22\u5f15\uff0c\u53ef\u4ee5\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u5b50\u4e32\u3002\u4f8b\u5982\uff0cstring[start:end]<\/code>\u5c06\u8fd4\u56de\u4ece\u8d77\u59cb\u7d22\u5f15\u5230\u7ed3\u675f\u7d22\u5f15\uff08\u4e0d\u5305\u62ec\u7ed3\u675f\u7d22\u5f15\uff09\u7684\u5b57\u7b26\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528str.split()<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u5206\u5272\u6210\u5217\u8868\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n
\u5982\u4f55\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5728Python\u4e2d\u622a\u53d6\u7279\u5b9a\u6a21\u5f0f\u7684\u5b57\u7b26\u4e32\uff1f<\/strong>
\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u5904\u7406\u5b57\u7b26\u4e32\u7684\u5f3a\u5927\u5de5\u5177\u3002\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528re<\/code>\u6a21\u5757\u6765\u5e94\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u3002\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u6a21\u5f0f\uff0c\u53ef\u4ee5\u63d0\u53d6\u7b26\u5408\u6761\u4ef6\u7684\u5b50\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u4f7f\u7528re.findall(pattern, string)<\/code>\u53ef\u4ee5\u83b7\u53d6\u6240\u6709\u5339\u914d\u7684\u90e8\u5206\uff0c\u9002\u5408\u4e8e\u590d\u6742\u7684\u5b57\u7b26\u4e32\u622a\u53d6\u9700\u6c42\u3002<\/p>\n
\u5b57\u7b26\u4e32\u622a\u53d6\u65f6\u5982\u4f55\u5904\u7406\u7a7a\u683c\u548c\u7279\u6b8a\u5b57\u7b26\uff1f<\/strong>
\u5728\u622a\u53d6\u5b57\u7b26\u4e32\u65f6\uff0c\u7a7a\u683c\u548c\u7279\u6b8a\u5b57\u7b26\u53ef\u80fd\u4f1a\u5f71\u54cd\u7ed3\u679c\u3002\u53ef\u4ee5\u4f7f\u7528str.strip()<\/code>\u65b9\u6cd5\u53bb\u9664\u5b57\u7b26\u4e32\u4e24\u7aef\u7684\u7a7a\u683c\uff0c\u6216\u8005\u4f7f\u7528str.replace(old, new)<\/code>\u66ff\u6362\u6389\u4e0d\u60f3\u8981\u7684\u5b57\u7b26\u3002\u6b64\u5916\uff0c\u7ed3\u5408\u5207\u7247\u548c\u6761\u4ef6\u5224\u65ad\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u6765\u5904\u7406\u7279\u6b8a\u5b57\u7b26\uff0c\u4ece\u800c\u83b7\u5f97\u66f4\u5e72\u51c0\u7684\u7ed3\u679c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u51e0\u79cd\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528\u5207\u7247\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u3001\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\u3002\u5176\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u662f […]","protected":false},"author":3,"featured_media":1102573,"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\/1102562"}],"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=1102562"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1102562\/revisions"}],"predecessor-version":[{"id":1102576,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1102562\/revisions\/1102576"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1102573"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1102562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1102562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1102562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}