Python3-正则表达式~贪婪模式与非贪婪模式

import re

str1 = r'aa<div>test1</div>bb<div>test2</div>cc'

str2 = r'aa<div>test1<div>test2</div></div>cc'

#贪婪模式
pattern=re.compile(r'<div>.*</div>')
s=pattern.search(str1)
print(s)
#非贪婪模式1
pattern=re.compile(r'<div>.*?</div>')
s=pattern.search(str1)
print(s)
#非贪婪模式2
pattern=re.compile(r'<div>.*?</div>')
s=pattern.search(str2)
print(s)

/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6 /Users/apple/PycharmProjects/stage4/spider/2018——0307/re_tanlan.py
<_sre.SRE_Match object; span=(2, 36), match='<div>test1</div>bb<div>test2</div>'>
<_sre.SRE_Match object; span=(2, 18), match='<div>test1</div>'>
<_sre.SRE_Match object; span=(2, 28), match='<div>test1<div>test2</div>'>


Process finished with exit code 0