Question

What’s the Pythonic way to go about reading files line by line of the two methods below?

with open('file', 'r') as f:
    for line in f:
        print line

or

with open('file', 'r') as f:
    for line in f.readlines():
        print line

Or is there something I’m missing?

Answer 1

Of the two you presented, the first is recommended practice. As pointed out in the comments, any solution (like that below) which doesn’t use a context manager means that the file is left open, which is a bad idea.

Original answer which leaves dangling file handles so shouldn’t be followed
However, if you don’t need f for any purpose other than reading the lines, you can just do:

for line in open('file', 'r'):
    print line