CODEWITHSUNDEEP
python
dustinyourface
dustinyourface

Reputation: 323

Class attribute won't change

class GameState:
    def __init__(self):
        '''initializes the players turn'''
        self._player_turn = 'BLACK'
    def change_player_white(self):
        self._player_turn = 'WHITE'
    def p_move(self):
        return self._player_turn

if I call

project41.GameState().change_player_white()
print(project41.GameState().p_move())

it still prints out 'BLACK'

Upvotes: 2

Views: 162

Answers (3)

Jamerson
Jamerson

Reputation: 484

You are creating a new instance of a GameState object with each of your calls.

Upvotes: 0

BrenBarn
BrenBarn

Reputation: 251598

Each call to GameState() creates a new instance. You created an instance, changed the player to white, and then discarded that player and created a new one on the following line. Try this:

state = project41.GameState()
state.change_player_white()
print(state.p_move())

Incidentally, your _player_turn is not a class attribute, but an instance attribute.

Upvotes: 1

aganders3
aganders3

Reputation: 5955

Each time you call project41.GameState() you are creating a new GameState object. Instead, what you may want is:

my_game = project41.GameState()
my_game.change_player_white()

print(my_game.p_move())

If you really want a variable that is shared by all instances of your class, do see the Class and Instance Variables section in the docs.

Upvotes: 1

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