Your main code is in LabVIEW® and someone need you to run a python script(program) and get its output.
Using an NI example modified for presentation
Original Example
LabVIEW® is a National Instruments product.
Below images on Modification of Original example to make full use of python sum as used in python script. Multiple number can be entered as string , remember that their must be at least one space between arguments to recognized as a new arg.
Original code: https://forums.ni.com/t5/Developer-Center-Resources/Calling-Python-Code-from-LabVIEW/ta-p/3521538?profile.language=en
National Instruments website: www.ni.com
For Python on sys : https://docs.python.org/2/library/sys.html