Need suggestions for fixing ABC error? - python-3.x

Question

I'm creating a boid flocking simulator and getting some errors. Suspecting they are issued by wrong usage of ABC. But I can't fix the error, been trying for a day.
the primary issue is in the Check_input class. flyers is somehow undefined and I'm trying to append them to the FlyerList if the input is registered.
Linked the whole code for full perspective.
from precode import Vector2D, intersect_rectangle_circle, intersect_circles
from abc import ABC, abstractmethod
from config import *
import pygame
class Flyer(ABC):
#abstractmethod
def draw(self):
pass
#abstractmethod
def move(self):
pass
class Boids(Flyer):
def __init__(self):
self.radius = 7
self.pos = Vector2D(100,100)
self.speed = Vector2D(1,1)
pass
def draw(self,screen):
pygame.draw.circle(screen, black, (int(self.pos.x), int(self.pos.y)),
self.radius)
pass
def move(self):
self.pos += self.speed
if self.pos.x + self.radius >= screen_res[0]:
self.speed.x *= -1
if self.pos.x - self.radius <= 0:
self.speed.x = self.speed.x * -1
if self.pos.y - self.radius >= 0:
self.speed.y *= -1
if self.pos.y + self.radius < screen_res[1]:
self.speed.y *= -1
pass
class Hoiks(Flyer):
def __init__(self):
self.radius = 9
self.pos = Vector2D(200,200)
self.speed = Vector2D(8,8)
def draw(self,screen):
pygame.draw.circle(screen, red, (int(self.pos.x), int(self.pos.y)),
self.radius)
pass
def move(self):
self.pos += self.speed
if self.pos.x + self.radius >= screen_res[0]:
self.speed.x *= -1
if self.pos.x - self.radius <= 0:
self.speed.x *= -1
if self.pos.y - self.radius >= 0:
self.speed.y *= -1
if self.pos.y + self.radius < screen_res[1]:
self.speed.y *= -1
class FlyerList():
flyers = []
def move_all(self):
for flyer in self.flyers:
flyer.move()
def draw_all(self):
for flyer in self.flyers:
flyer.draw()
class Check_input():
def boidspawn(self, event):
if event.type == pygame.MOUSEBUTTONDOWN:
flyers.append(Boids)
def hoikspawn(self, event):
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
flyers.append(Hoiks)
class Game:
def __init__(self):
pygame.init()
self.flyer_list = FlyerList()
self.check_input = Check_input()
def Gameloop(self,event):
while 1:
self.flyer_list.move_all()
self.flyer_list.draw_all()
self.check_input.boidspawn(event)
self.check_input.hoikspawn(event)
# self.check_collision()
def game_code():
# pygame.init()
game = Game()
boid = Boids()
hoik = Hoiks()
bats = FlyerList
check = Check_input()
screen = pygame.display.set_mode(screen_res)
clock = pygame.time.Clock()
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT or event.type == pygame.KEYDOWN and
event.key == pygame.K_ESCAPE:
exit()
pygame.draw.rect(screen, (255,255,255), (0, 0, screen.get_width(),
screen.get_height()))
time_passed = clock.tick(30) # limit to 30FPS
time_passed_seconds = time_passed / 1000.0 # convert to seconds
x, y = pygame.mouse.get_pos()
game.Gameloop(event)
pygame.display.update()
if __name__ == '__main__':
game_code()