CodeEval Uniq Elements

unique_elements.py

from itertools import ifilterfalse
import sys


def unique(iterable):
    seen = set()
    seen_add = seen.add

    for element in ifilterfalse(seen.__contains__, iterable):
        seen_add(element)
        yield element


if __name__ == '__main__':
    test_cases = open(sys.argv[1], 'r')
    for line in test_cases:
        print ','.join(unique(line.rstrip().split(',')))

    test_cases.close()