一篇文章带你了解python正则表达式的正确用法

# 导入re模块
import re
# 使用match方法进行匹配操作
result = re.match(正则表达式,要匹配的字符串)
# 如果上一步匹配到数据的话，可以使用group方法来提取数据
result.group()

# 导入re模块
import re

# 使用match方法进行匹配操作
result = re.match("test","test.cn")
# 获取匹配结果
info = result.group()
print(info)

# 匹配任意一个字符
import re

ret = re.match(".","x")
print(ret.group())

ret = re.match("t.o","too")
print(ret.group())

ret = re.match("o.e","one")
print(ret.group())

import re

ret = re.match("[hH]","hello Python")
print(ret.group())
ret = re.match("[hH]","Hello Python")
print(ret.group())

import re

ret = re.match("神州\d号","神州6号")
print(ret.group())

non_obj = re.match("\D", "s")
print(non_obj .group())

match_obj = re.match("hello\sworld", "hello world")
print(match_obj .group())

match_obj = re.match("hello\Sworld", "hello&world")
result = match_obj.group()
print(result)

match_obj = re.match("\w", "A")
result = match_obj.group()
print(result)

match_obj = re.match("\W", "&")
result = match_obj.group()
print(result)