Die Martin Die

Supposotory*

if debug.getinfo(1).what == "main" then
  -- ...
end

Not that you’ll ever use it. No, seriously.

Edit: actually, they are not quite equivalent. This code just checks whether we are outside any function, not necessarily in the main file (i.e. not in a module). I don’t think there’s an equivalent to Python’s __name__ in stock Lua.