[split] Check presence of a file

[gontajones]

If your first code is in a file, for example, called mySensorModule.py.
You can import all of its content with:

import mySensorModule as mS
# To call read_sensor()
sensorID = 1
mS.read_sensor(sensorID)

Or...

from mySensorModule import read_sensor
# Call read_sensor()
sensorID = 1
read_sensor(sensorID)