python 中的正则表达式：是否可以获得匹配、替换和最终字符串

使用Python中的正则表达式，我们可以轻松地进行字符串匹配、替换和生成最终字符串。正则表达式是一种强大的模式匹配工具，它可以帮助我们在文本中查找特定模式的字符串，并对其进行操作。

python
import re

python
import re
string = "Hello, World!"
pattern = r"World"
match_result = re.match(pattern, string)
if match_result:
    print("匹配成功")
else:
    print("匹配失败")

python
import re
string = "I have 2 apples and 3 oranges."
pattern = r"\d"
replace_result = re.sub(pattern, "X", string)
print(replace_result)

python
import re
string = "Name: John, Age: 25"
pattern = r"Name: (\w+), Age: (\d+)"
extract_result = re.search(pattern, string)
if extract_result:
    name = extract_result.group(1)
    age = extract_result.group(2)
    print("姓名：", name)
    print("年龄：", age)

python
import re
email = "example@example.com"
pattern = r"[\w.-]+@[\w-]+\.[\w.-]+"
if re.match(pattern, email):
    print("邮箱格式正确")
else:
    print("邮箱格式错误")

python
import re
text = "我的手机号码是：13812345678，你可以给我打电话。"
pattern = r"\d{11}"
phone_numbers = re.findall(pattern, text)
print(phone_numbers)

python
import re
html = "
This is a sample HTML.
"
pattern = r"<[^>]+>"
result = re.sub(pattern, "", html)
print(result)