CODEWITHSUNDEEP
pythonclass
Paradox
Paradox

Reputation: 3

Class Help: "NameError: name 'self' is not defined"

I am attempting to create a Pawn class for a chess game, but I get the error "NameError: name 'self' is not defined" in the "can_move" function's first if statement, even though I define the colour as the input in the initialise function? Any ideas?

class Pawn(object):
    def __init__(self, x, y, colour):
        #store the pawns coords
        self.x = x
        self.y = y
        #store the colour of the piece
        self.colour = colour
        #store if it moved yet or not
        self.moved = False
        self.print_value = self.colour+"P"
    def can_move(newx, newy):
        #func to check if piece can move along those coords
        if self.colour == "W":
            pieces = game_tracker.live_white
        elif self.colour == "B":
            pieces = game_tracker.live_black

Upvotes: 0

Views: 929

Answers (2)

Malik Brahimi
Malik Brahimi

Reputation: 16711

You need to add self as an argument, representing the current instance of the class. Also indent.

class Pawn(object):

    def __init__(self, x, y, colour):
        #store the pawns coords
        self.x = x
        self.y = y
        #store the colour of the piece
        self.colour = colour
        #store if it moved yet or not
        self.moved = False
        self.print_value = self.colour+"P"

    def can_move(self, newx, newy):
        #func to check if piece can move along those coords
        if self.colour == "W":
            pieces = game_tracker.live_white
        elif self.colour == "B":
            pieces = game_tracker.live_black

Upvotes: 1

Tim
Tim

Reputation: 43314

Instance methods need self as first argument

def can_move(self, newx, newy):

Otherwise the method does not know which instance it is operating on

Upvotes: 2

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