#start counting at 1
i = 1
#open file as f
f = open('c:\\users\\user\\documents\\rosalind\\rosalind_ini5.txt')
#read lines in the file w/readlines()
#if a line is even, print that line
for line in f.readlines():
    if i % 2 == 0 :
        print line
#repeat for the rest of the line and add them to the text in the file
    i += 1