➔ Launching «'/usr/local/bin/python3' '-u' '-O' '/home/lvuser/py/robot.py' 'run'»
 17:16:20:912 INFO    : wpilib              : WPILib version 2017.1.2
 17:16:20:916 INFO    : wpilib              : HAL base version 2017.1.2; roboRIO platform version 2017.1.2
 17:16:20:916 INFO    : wpilib              : HAL library version 2017.3.1
 17:16:20:917 INFO    : wpilib              : robotpy-ctre version 2017.0.2
 17:16:20:918 INFO    : wpilib              : robotpy-cscore version 2017.0.2
 17:16:20:933 INFO    : nt                  : NetworkTables 2017.0.8 initialized in server mode
 17:16:20:943 INFO    : robot               : Default IterativeRobot.disabledInit() method... Overload me!
 17:16:20:945 WARNING : robotpy             : Robots don't quit!
 17:16:20:962 ERROR   : wpilib.ds           : ERROR Unhandled exception
 Traceback (most recent call last):
   File "/usr/local/lib/python3.6/site-packages/wpilib/robotbase.py", line 181, in main
     robot.startCompetition()
   File "/usr/local/lib/python3.6/site-packages/wpilib/iterativerobot.py", line 101, in startCompetition
     self.disabledPeriodic()
   File "/home/lvuser/py/robot.py", line 10, in disabledPeriodic
     data1, data2 = self.sensor.readOnly(2)
   File "/usr/local/lib/python3.6/site-packages/wpilib/i2c.py", line 180, in readOnly
     return hal.readI2C(self.port, self.deviceAddress, count)
   File "/usr/local/lib/python3.6/site-packages/hal/functions.py", line 395, in readI2C
     raise IOError(_os.strerror(C.get_errno()))
 OSError: Success