I need to iterate over text file and print specific text starting from and end fulfilling condition in python 3

Question

example txt file :

vrf X.x.X
hello
!
how are you
!
vrf y.y.y.
hi
!

I want to run through above provided text and print the output starting

Answer 1

The solution using re.findall() function:

import re

with open('lines.txt', 'r') as fh:
    result = re.findall(r'vrf[^!]+(?=!)', fh.read(), re.M)

print(''.join(result))

The output:

vrf X.x.X
hello
vrf y.y.y.
hi