from PID import PID

pid=PID(0.1,0,0)
pid.SetPoint =20.0
#pid.setOutputLimits(-100, 100)
while True:
  sensor = out.read()
  
  #set some sort of target value
  pid.update(sensor)
  print pid.output
  #do something with the output
  inp.write(pid.output)
  time.sleep(1.0)