imported function bringing error: name not defined

Your problem is a combination of circular imports and using "from import *".

The best solution is to organize your code so that you do not have a need for circular imports. What is a circular import? You have Game importing Event which then imports Game. You can see this in the stacktrace (I edited your question to include it) as you look at the line that is executing at the time of the error.

The second part of your problem is the way that Python's import mechanism and "from import *" works. The first time around, Game.py is being executed. The first line encountered is from Events import *. So python looks through sys.modules and does not find the module Events. So it starts to load Events.py. Loading of Events.py will execute the statements in order. The first statement is from Game import *. Since Game is not in sys.modules, it will be loaded. So the first statement is from Events import *. If this seems confusing right now, then yes it is: don't have circular imports. This time Events is found in sys.modules. However, it is not fully initialized because it is still being loaded. So Game finds all of the names defined at this time in Events, which there aren't any. Then it continues on and tries to find an object named Opening in the current scope but can't find it. Arguably, python should crash as soon as it encounters a circular import, and tell you not to do that, but it doesn't. It might work, if you are extra careful, but it is a bad idea anyway.