def main():
    if (len(sys.argv) not in [2, 3]):
        usage()
    url = sys.argv[1]
    path = None
    if (len(sys.argv) > 2):
        path = sys.argv[2]
    bt = BtDown(url, path)
    bt.download()
    print('------------------ Well done ------------------')
def main():
    if (len(sys.argv) not in [2, 3]):
        usage()
    url = sys.argv[1]
    path = None
    if (len(sys.argv) > 2):
        path = sys.argv[2]
    bt = BtDown(url, path)
    bt.download()
    print('------------------ Well done ------------------')