How to pass arguments involving players?

I DO NOT want to use RemoteEvents, so please don't mention them as answers.

I just want to pass a player type into another script, but without using RemoteEvents. Is this possible? I came up with this code inside a Module Script:

mod = {}

mod.passVariable = function(plr)
print(plr.ClassName)
end)

return mod

Inside of another script:

p = game.Players.LocalPlayer
a = require(game.Workspace["Test Script"]
a.passVariable(p)

For some reason this doesn't work. Please help me out!

It seems like you want to be able to pass one variable, for instance the numeral 5 over to another script. This is where Remote Events WOULD have been extremely efficient and more useful, only if you wanted to use them. So, in one glance I can see a few errors in which could have possibly caused your error.

mod = {}

mod.passVariable = function(plr)
	print(plr.ClassName)
	return plr.ClassName
end --Where the parentheses would have been.

return mod

Now, the parentheses that you add at the end of 'end' was removed due to it not being needed, I also added a return after the print so we can use the function as a variable.

local p = game.Players.LocalPlayer
local a = require(workspace["Test Script"]) --Added in the parentheses, also changed game.Workspace to 'workspace', More efficient.
local var = a.passVariable(p) --Now returns a value, which we can use later on.

In my changes for the upper segment I have adding in the parentheses that you possibly forgot to implement, I also changed your variable to local variables as your variables were previously global, which slows down performance and were inefficient. Next, having respect for my first correction I reminded myself that we return the value when the function is called, so I changed the area where we call the 'passVariable' function to a variable so we can use the return value later on. I also changed 'game.Workspace' to 'workspace' as it saves space and is more efficient. Cheers!