11.7. 编译正则表达式¶
#!/usr/bin/env python
# -*- coding:utf8 -*-
# auther; 18793
# Date：2019/5/21 17:43
# filename: re_compile.py
import re
p = r'\w+@hujianli\.com'
regex = re.compile(p)
text = "Tony's email is tony_187@hujianli.com"
m = regex.search(text)
print(m) #<_sre.SRE_Match object; span=(16, 37), match='tony_187@hujianli.com'>
m = regex.match(text)
print(m) #None
p = r"[Jj]ava"
regex = re.compile(p)
text = 'I like Java and java'
match_list = regex.findall(text)
print(match_list) #['Java', 'java']
match_iter = regex.finditer(text)
for m in match_iter:
print(m.group()) #Java
#java
p = r'\d+'
regex = re.compile(p)
text = 'AB1234QCD34EF'
clist = regex.split(text)
print(clist) #['AB', 'QCD', 'EF']
repace_text = regex.sub("-",text)
print(repace_text) #AB-QCD-EF
11.7.1. 编译标志¶
re.A和re.U¶
re.A 设置采用ASCII编码
re.U 设置采用Unicode编码
eg
# -*- coding:utf8 -*-
# auther; 18793
# Date：2019/5/21 17:54
# filename: re_compile2.py
import re
text = "你们好Hello"
p = r"\w+"
regex = re.compile(p, re.U)
m = regex.search(text)
print(m) #匹配 <_sre.SRE_Match object; span=(0, 8), match='你们好Hello'>
m1 = regex.match(text)
print(m1) #匹配 <_sre.SRE_Match object; span=(0, 8), match='你们好Hello'>
regex = re.compile(p, re.A)
m = regex.search(text)
print(m) #匹配 <_sre.SRE_Match object; span=(3, 8), match='Hello'>
regex = re.compile(p, re.A)
m = regex.match(text)
print(m) #不匹配 None