script to load/unlock using juicessh gestures

juicessh.py

#!/usr/bin/env python3
import dbus
import tty
import termios
import sys

def getchar():
   #Returns a single character from standard input
   fd = sys.stdin.fileno()
   old_settings = termios.tcgetattr(fd)
   try:
      tty.setraw(sys.stdin.fileno())
      ch = sys.stdin.read(1)
   finally:
      termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
   return ch

system_bus = dbus.SystemBus()
login1 = system_bus.get_object('org.freedesktop.login1', '/org/freedesktop/login1')
login1_manager = dbus.Interface(login1, dbus_interface='org.freedesktop.login1.Manager')
seat = None
for i in login1_manager.ListSessions():
    session, uid, user, seat, objectpath = i
    if seat:
        break
if not seat:
    print("no seats found")

print("UNLOCK <=== SWIPE ===> LOCK")
while 1:
    c = getchar()
    if c == "\x01":
        ctrla = True
    elif ctrla and c == "p":
        login1_manager.UnlockSession(session)
        ctrla = False
    elif ctrla and c == "n":
        login1_manager.LockSession(session)
        ctrla = False
    elif ctrla and c == "q":
        sys.exit()
    else:
        ctrla = False