Pythonic method to sum all the odd-numbered lines in a file

Question

I\'m learning Python for a programming placement test I have to take for grad school, and this is literally the first little script I threw together to get a feel for it. My bac

Answer 1

You could do:

with open("test_file1.txt", "r") as inf:
    lines = inf.readlines()
    for l in lines[1::2]:  # read only alternating lines
        numList = map(int, line.split())
        print "Sample size:", len(numList), "Results:", sum(numList)