python正则表达式re.search()的基本使用教程

import re
 
content = "abcabcabc"
rex = re.search("c", content)
print(rex)

import re
 
content = "abcabcabc"
rex = re.search("c", content)
print(rex.group())

import re
 
content = "abcabcabc"
rex = re.search("c", content)
print(rex.group())

import re
 
content = "abcabcabc"
rex = re.search("C", content, re.I)
print(rex.group())

import re
 
content = "abc123abc"
rex = re.search("\d+", content)
print(rex.group())

import re
 
content = "abc123abc"
rex_content = re.compile("\d+")
rex = rex_content.search(content)
print(rex.group())

import re
 
content = "abc123def"
rex_compile = re.compile("([a-z]*)([0-9]*)([a-z]*)")
rex = rex_compile.search(content)
print(rex.group())
print(rex.group(0))  # group()和group(0) 一样匹配的是整体
print(rex.group(1))  # 匹配第一个小括号的内容
print(rex.group(2))  # 匹配第二个小括号的内容
print(rex.group(3))  # 匹配第三个小括号的内容

content = "zhangsanfeng108le"
rex_compile = re.compile("(?P<name>[a-z]*)(?P<age>[0-9]*)")
rex_content = rex_compile.search(content)
print(rex_content.group())
print(rex_content.group("name"))  # 这里效果等同于group(1)
print(rex_content.group("age"))  # 这里效果等同于group(2)