+ means"match one or more"

the group proceding a plus must appear at least once.

 

# -*- coding: utf-8 -*-

"""

Spyder Editor

This is a temporary script file.

"""

import re

re1=re.compile(r'bat(wo)+man')

mo1=re1.search("the adventure of batman")

#print("mo1.group():",mo1.group())

#出现错误，wo至少出现一次

mo2=re1.search("the adventure of batwoman")

print("mo2.group():",mo2.group())

mo3=re1.search("the adventure of batwowowowoman")

print("mo3.group():",mo3.group())