How to call python script converted to exe from tally prime?

I had a small question:
I have a sendwhatsapp.exe file which I have created on python and converted.
I am able to run it from cmd and it contains commandline arguments . Two of them for now.

What should I write in the function code that executes the app from tally tdl.

Will this work?
[Function:sendwapp]
10:Exec Command:"D:\appname.exe"+##Contacts+##Exportedfilepath

 

I think it should work

[Function:sendwapp]
10:Exec Command Ex:"D:\appname.exe":##Contacts+" "+##Exportedfilepath

 

Thank You Sir!

 

what do to close that cmd window