Write a program that Read first n lines of file

Python 2:

with open("datafile") as myfile:

   head = [next(myfile) for x in xrange(N)]

print head

Python 3:

with open("datafile") as myfile:

   head = [next(myfile) for x in range(N)]

print(head)

Both Python 2 & 3:

from itertools import islice

with open("datafile") as myfile:

   head = list(islice(myfile, N))

print head

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