How to make my sprite turn towards my mouse properly

Question

I am trying to make my gun turn towards my mouse but it just starts glitching out. My image begins to turn weirdly, most likely to the glitch, and becomes extremely grainy. Shortly after ,pygame runs out of memory and the IDE crashes. I am really unsure if it is because my computer is crappy or because there is an issue with my code.

This is my code:

import pygame, math
screen_width = 700
screen_height = 700
screen = pygame.display.set_mode((screen_width, screen_height))
clock = pygame.time.Clock()

class player(pygame.sprite.Sprite):
    def __init__(self, width, height, pos_x, pos_y, color):
        super().__init__()
        self.image = pygame.Surface([width, height])
        self.image.fill(color)
        self.rect = self.image.get_rect()
        self.rect.center = (pos_x, pos_y)
        self.height = height
        self.width = width
        self.moving_right = False
        self.moving_left = False
        
    def update(self):
        dx = 0
        dy = 0
        keys = pygame.key.get_pressed()
        if keys[pygame.K_d]:
            dx = 5
            self.moving_right = True
        else:
            self.moving_right = False
        if keys[pygame.K_a]:
            dx = -5
            self.moving_left = True
        else:
            self.moving_left = False
        if keys[pygame.K_w]:
            dy = -5
        if keys[pygame.K_s]:
            dy = 5
        self.rect.x+=dx
        self.rect.y+=dy
        if self.rect.top < wall_y:
            dy = 0
            self.rect.y  = wall_y
        if self.rect.bottom > wall_y + wall_height:
            dy = 0
            self.rect.bottom  = wall_y + wall_height
        if self.rect.right > wall_x + wall_width:
            dx = 0
            self.rect.right  = wall_x + wall_width
        if self.rect.left < wall_x:
            dx = 0
            self.rect.left  = wall_x

def Wall(width, height, pos_x, pos_y, color):
    pygame.draw.rect(screen, color, (pos_x, pos_y, width, height))
    global wall_x, wall_y, wall_height, wall_width
    wall_x, wall_y, wall_height, wall_width = pos_x, pos_y, height, width
 
class crosshair(pygame.sprite.Sprite):
    def __init__(self, width, height):
        super().__init__()
        crosshair = pygame.transform.scale(pygame.image.load('crosshair.png'), (20, 20))
        self.image = crosshair
        self.rect = self.image.get_rect()
        
    def update(self):
        self.rect.center = (pygame.mouse.get_pos())

class gun(pygame.sprite.Sprite):
    def __init__(self, width, height):
        super().__init__()
        Gun = pygame.transform.scale(pygame.image.load('gun2.png'), (width, height))
        self.image = Gun
        self.rect = self.image.get_rect()
        self.rect.center = (100, 100)
        self.width = width
        self.height = height
        
    def update(self):
        Gun = pygame.transform.scale(pygame.image.load('gun2.png'), (self.width, self.height))
        self.rect.center = (player.rect.x + 40, player.rect.y + 20)
        pos = pygame.mouse.get_pos()
        #angle = 360 - math.atan2(pos[1] - (screen_height/2), pos[0] - (screen_height/2)) * 180 / math.pi

        angle = math.atan2(pos[1] - (self.rect.y+32), pos[0] - (self.rect.x-26))
        playerrot = pygame.transform.rotate(self.image, 360-angle*57.29)
        playerpos1 = (self.rect.x-playerrot.get_rect().width/2, self.rect.x-playerrot.get_rect().height/2)
        self.image = playerrot
        self.rect.center = playerpos1

player = player(40, 40, 100, 100, (255,255,255))
player_group = pygame.sprite.Group()
player_group.add(player)

Crosshair = crosshair(20, 20)
crosshair = pygame.sprite.Group()
crosshair.add(Crosshair)

shotGun = gun(40, 25)
gun_group = pygame.sprite.Group()
gun_group.add(shotGun)

running = True

while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
            quit
    pygame.mouse.set_visible(False)
    screen.fill((60,179,113))
    Wall(650, 650, 25, 25, (100, 255, 100))
    player_group.draw(screen)
    player_group.update()
    gun_group.draw(screen)
    gun_group.update()
    crosshair.draw(screen)
    crosshair.update()
    clock.tick(60)
    
    pygame.display.flip()