Python re.match详解

import re

# 匹配以"hello"开头的字符串
pattern = "hello"
string = "hello world"
result = re.match(pattern, string)

if result:
    print(f"匹配成功：{result.group()}")
else:
    print("匹配失败")

匹配成功：hello

import re

# 匹配整个字符串是否为数字
pattern = "\d+"
string = "123456"
result = re.fullmatch(pattern, string)

if result:
    print(f"匹配成功：{result.group()}")
else:
    print("匹配失败")

匹配成功：123456

import re

pattern = r'(\d{3})\D+(\d{3})\D+(\d{4})'
string = "Tel: 123-456-7890"
result = re.match(pattern, string)

if result:
    print(f"匹配成功")
    print(f"区号: {result.group(1)}")
    print(f"电话号码: {result.group(2)}-{result.group(3)}")
else:
    print("匹配失败")

匹配成功
区号: 123
电话号码: 456-7890