Python Python tutorial: apparently gamemap: GameMap in entity.py does not work?

[Kaworu]

Hi!

I am following the Python Roguelike tutorial. I am currently in the 6th part of it. And in my source code there is an error I cannot fix myself.

When I am trying to run main.py, the window with the game gets generated. However, when I try to make any move, an error occurs:

Traceback (most recent call last):
  File "C:\Users\DELL\Desktop\My_Roguelike\main.py", line 65, in <module>
    main()
  File "C:\Users\DELL\Desktop\My_Roguelike\main.py", line 62, in main
    oEngine.event_handler.handle_events()
  File "C:\Users\DELL\Desktop\My_Roguelike\input_handlers.py", line 32, in handle_events
    action.perform()
  File "C:\Users\DELL\Desktop\My_Roguelike\actions.py", line 89, in perform
    if self.blocking_entity:
  File "C:\Users\DELL\Desktop\My_Roguelike\actions.py", line 51, in blocking_entity
    return self.engine.game_map.get_blocking_entity_at_location(*self.dest_xy)
  File "C:\Users\DELL\Desktop\My_Roguelike\actions.py", line 17, in engine
    return self.entity.gamemap.engine
AttributeError: 'Entity' object has no attribute 'gamemap'

I am not really sure what is not working, but I have a suspicion. In entity.py I have a class Entity with a line:

gamemap: GameMap

And I believe that for some kinda reason, this is where things go bad (I think?). However, I have totally no idea WHY it's not working...

The full source code is on my GitHub, here. I would appreciate any help.