正则表达式(一)

1、ASCII字符对应的字符组 [\x00-\x7F]

      例如：判断是否是ASCII字符

      

# -*- coding: UTF-8 -*-
import re

print (re.search("^[\x00-\x7F]$", "c")!=None)
print (re.search("^[\x00-\x7F]$", "I")!=None)
print (re.search("^[\x00-\x7F]$", "0")!=None)
print (re.search("^[\x00-\x7F]$", "<")!=None)
print (re.search("^[\x00-\x7F]$", "@")!=None)
 

 

2、正则表达式的提取，以python代码为例

 

#正则表达式的提取
print (re.search("^[\x00-\x7F]$", "@").group(0))

#匹配并提取所有的字符串,r 代表原生字符
for zipcode in re.findall(r"\d{6}","zipcode1:201203,zipcode2:100859"):
    print (zipcode)