[Tutor] Thread Object integration with GPIO

[Marc Eymard]

Hello there,

I have hooked up an ultrasonic sensor to my Raspberry Pi-enabled robot 
in order to get continuous distance-to-obstacle reading.

The sensor is properly connected via GPIO and already reads the distance 
properly when running a simple script.

However, I need to integrate the sensor reading logic to an existing 
script provided by PiBorg called YetiBorg.py

The way I have decided to go about implementing the sensor reading is by 
creating a Thread object and update the distance attribute of this very 
same object from the run() function. The idea is to encapsulate the 
distance reading within the sensor object as much as possible by i. 
creating a sensor/thread object and by ii. avoiding global variables.

Attached the script I have come up with, which keeps returning multiple 
run time errors whenever I try to fix it.
I believe there are multiple issues, but at least it gives an idea of 
what I currently want to achieve and how.

Can a charitable soul advise whether my approach makes sense and whether 
I am using the right type of object for the task at hands?

I am looking for guidance and willing try completely different 
approach/objects if necessary.

Thanks in advance for sending me into the right direction.
Marc