If it is “pretty large” file, then access the lines sequentially and don’t read the whole file into memory:
with open('largeFile', 'r') as inF:
for line in inF:
if 'myString' in line:
# do_something
If it is “pretty large” file, then access the lines sequentially and don’t read the whole file into memory:
with open('largeFile', 'r') as inF:
for line in inF:
if 'myString' in line:
# do_something