Python正则表达式实现非捕获分组

import re

s = 'img1.jpg,img2.jpg,img3.bmp'

# 捕获分组

p = r'\w+(\.jpg)'

mlist = re.findall(p, s)       ①

print(mlist)

# 非捕获分组

p = r'\w+(?:\.jpg)'

mlist = re.findall(p, s)       ②

print(mlist)

['.jpg', '.jpg']

['img1.jpg', 'img2.jpg']