need help with ultrasonic sensor code

[gontajones]

After you press CTRL+C the while loop at line 46 will break and your function main() will exit. Then come this part:

if 0 < 10:
    os.system('. /home/pi/test.sh')

Where your script is called.
So if you want that the script runs along with the US sensor outputs, it has to be inside the while loop.
PS: This condition of your "if" will be always True.