The keyword self

In dem Code oben hast du gesehen, dass die Methode act als Parameter das Schlüsselwort self erwartet.

All methods that belong to an object always receive this keyword as the first parameter.

Then, within the method, attributes and methods of the object itself can be accessed using this keyword.

Example:

Dieser Code

@player.register
def act(self):
    self.direction = "right"

ist gleichbedeutend mit diesem Code:

@player.register
def act(self):
    player.direction = "right"

self refers to the player object where the method was registered.