Reading two text files line by line simultaneously

by 
from itertools import izip

with open("textfile1") as textfile1, open("textfile2") as textfile2: 
    for x, y in izip(textfile1, textfile2):
        x = x.strip()
        y = y.strip()
        print("{0}\t{1}".format(x, y))

In Python 3, replace itertools.izip with the built-in zip.

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