CodeEval - Column Names - Moderate

import sys

test_cases = open(sys.argv[1], 'r')
for test in test_cases:
    value=int(test)
    result = ""
    while (value > 0):
        value-=1;
        result = str(chr(ord('A') + value % 26)) + result
        value /= 26
    print result

test_cases.close()