I am trying to make an enemy move toward my player, but am getting an Attribute Error

Question

This is the relevant part of the code that I am having issues with. The player.x and player.y are getting "AttributeError: type object 'player' has no attribute 'x'" errors in the debug console. I have a seperate class called "player" and I want to get its x and y coordinate while it is moving around so that the enemy can move toward it. This is the player class beginning part that is also relevant:

class player(object):
    def __init__(self, x, y, sprintMultiplier, fps):
        self.x = x
        self.y = y
        self.vel = 1/fps * 150


class enemy(object):
    def __init__(self, fps, difficulty):
      pass

    def draw(self, window):
        self.moveTowardsPlayer()
        window.blit(self.downStanding, (self.x, self.y))

    def moveTowardsPlayer(self):
        dx, dy = self.x - player.x, self.y - player.y
        dist = math.hypot(dx, dy)
        dx, dy = dx/dist, dy/dist
        self.x += dx * self.vel
        self.y += dy * self.vel

Answer 1

Error in your code

• You are declaring the x and y variables of the class player as private instance variables whereas in the enemy class you are accessing those x and y values as global variables.

So the work around the problem is.

You either declare the x and y values as global variables as below and access those x and y variables as global ones in the constructor as given below.

class player(object):
     x = 0
     y = 0
     def __init__(self, x, y, sprintMultiplier, fps):
       player.x = x
       player.y = y
       self.vel = 1/fps * 150

or Pass a player instance to the method moveTowardsPlayer() within the enemy class if you don't want to keep the x and y variables (of player class) as global/class variables. Code is given below.

def moveTowardsPlayer(self, player1):
    dx, dy = self.x - player1.x, self.y - player1.y
    dist = math.hypot(dx, dy)
    dx, dy = dx/dist, dy/dist
    self.x += dx * self.vel
    self.y += dy * self.vel