So, just output the even lines.
i = 1
f = open('file')
for line in f.readlines():
    if i % 2 == 0 :
        print line
    i += 1
6
solved Python. Even-numbered lines in text file
 
So, just output the even lines.
i = 1
f = open('file')
for line in f.readlines():
    if i % 2 == 0 :
        print line
    i += 1
6
solved Python. Even-numbered lines in text file