Python: Best way to access variable from within a class instance?

If you pass the Map to the Player at init this just passes a reference not a copy. You will not create redundant instances of Map this way, and it's the best way to do it.

Nothing in Python is ever implicitly copied. Whenever you do x = y, whether that's a function call or a variable/element/attribute assignment, x and y afterwards refer to the same object.

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