copy from file while find a mark in python

Question

hello guys i tried to do that code but it's not work :(

F=open('C:\T\list.txt','r').readlines()
B=open('C:\T\list2.txt','w')
BB=open('C:\T\list2.txt','r').readlines()
while BB.readlines() == 'John smith':
    B.writelines(F)

so how i can told my python : go to copy from file : List1.txt to List2.txt but if you found John smith stop copying and close !

List1.txt:
Natly molar
Jone rock
marin seena
shan lra
John smith
Barry Bloe
Sara bloe`

Answer 1

F=open('C:\T\list1.txt','r')
B=open('C:\T\list2.txt','w')
for l in F: #for each line in list1.txt
    if l.strip() == 'John Smith':  #l includes newline, so strip it
        break
    B.write(l)

F.close()
B.close()

Answer 2

from itertools import takewhile

with open('List1.txt') as fin, open('List2.txt', 'w') as fout:
    lines = takewhile(lambda x : x != 'John smith\n', fin)
    fout.writelines(lines)