Use File Iterator

Sourcery refactoring id: use-file-iterator

Description

Use the in-built file iterator rather than calling readlines()

Before

with open("foo") as f:
    for line in f.readlines():
        print(line)

After

with open("foo") as f:
    for line in f:
        print(line)

Explanation

The file object that Python returns when you open a file is a lazy iterator over that file's lines. This means that there is no need to call readlines to iterate over it. Iterating directly is shorter, and also does not load the whole file into memory with a list object ( which readlines does) so can be more performant.