parser=argparse.ArgumentParser(description='Commandline tool for Trezor devices.')
parser.add_argument('-v','--verbose',dest='verbose',action='store_true',help='Prints communication to device')
parser.add_argument('-t','--transport',dest='transport',choices=['usb','serial','pipe','socket'],default='usb',help="Transport used for talking with the device")
parser.add_argument('-p','--path',dest='path',default='',help="Path used by the transport (usually serial port)")