Identify the function call statement in the following snippet
Are you writing an interview test right now ?

__name__ is not a function. Is a special keyword used by Python and its value is ‘__main__’ if the script is run directly from terminal.
So if another script.py imports the one in the photo, the code inside the if statement won’t execute.  

sys.argv


Is a list of the arguments of the script, if given any from the terminal. The reason of sys.argv[1:] is to exclude the first argument which is the file name of the script.

So you are right. The only function call statement is the main(...)

As far as for why the notorious  

if __name__ == ‘__main__:’


is used, I would say for testing purposes. Imagine having a lot of .py files which import other .py files. You need to test each one separately from the other.