CodeEval - Black card - Easy

import sys

def black_card(test):
    arr = test.split(" | ")
    n = int(arr[1])
    valz = arr[0].split()
    while len(valz) > 1:
        valz.pop((n%len(valz))-1)
    return valz.pop()

test_cases = open(sys.argv[1], 'r')
for test in test_cases:
    print black_card(test)
test_cases.close()