How to read in only every second line of file?

Question

I need to read in only every second line of a file (which is very big) so I don\'t want to use readlines(). I\'m unsure how to implement the iterator so any sug

Answer 1

You can use a custom iterator:

def iterate(pth):
    for i, line in enumerate(pth, 1):
        if not i % 2:
            yield line