def version_not_less_than(v1, v2):
    """ Return True is v1 > v2, False if v1 <= v2 """
    if not v1 or not v2:
        return False
    for i, j in zip(map(int, v1.split('.')), map(int, v2.split('.'))):
        if i == j:
            continue
        return i > j
    return len(v1.split('.')) >= len(v2.split('.'))
