CODEWITHSUNDEEP
pythonpygame
Gavin Xu
Gavin Xu

Reputation: 78

pygame TypeError: Argument must be rect style object

I'm trying python with a simple game, but encounter this error.
The codes as below:

import pygame
from pygame.sprite import Sprite

class Bullet(Sprite):
    """A class to manage bullets fired by the ship."""
    def __init__(self, ai_game):
        super().__init__()
        self.screen = ai_game.screen
        self.settings = ai_game.settings
        self.color = self.settings.bullet_color
    
        # Create a bullet rect at (0, 0) and then set correct position.
        # self.rect = pygame.Rect(0, 0, self.settings.bullet_width,
        #     self.settings.bullet_height)
        self.rect = pygame.Rect(left=0, top=0, width=self.settings.bullet_width,
            height=self.settings.bullet_height)
        # ...

Then the error says:

File "my_codes/alien_invasion/bullet.py", line 15, in init
self.rect = pygame.Rect(left=0, top=0, width=self.settings.bullet_width,
TypeError: Argument must be rect style object

If I change the line as below it works fine:

self.rect = pygame.Rect(0, 0, self.settings.bullet_width,
    self.settings.bullet_height)

I don't under stand why only positional args passing works here.
I would appreciate it if you can help me.

Upvotes: 1

Views: 935

Answers (1)

Rabbid76
Rabbid76

Reputation: 210878

See the documentation of pygame.Rect:

[...] A Rect can be created from a combination of left, top, width, and height values. Rects can also be created from python objects that are already a Rect or have an attribute named "rect".

See an implementation of the constructor of pygame.Rect (from pygame_cffi):

class Rect(object):
    # [...]

    def __init__(self, *args):
        # [...]

Therefore, you cannot specify the arguments with keyword arguments.

Upvotes: 2

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