We have a large raw data file that we would like to trim to a specified size.
I am experienced in .net c#, however would like to do this in python to simplify things and out of interest.
How would I go about getting the first N lines of a text file in python?
Will the OS being used have any effect on the implementation?
with open("datafile") as myfile: head = [next(myfile) for x in xrange(N)] print head
Here's another way
from itertools import islice with open("datafile") as myfile: head = list(islice(myfile, N)) print head