I dont know where this error is coming from - pygame

Question

Im trying to play my code but i get this error 'video system not initialized' and i dont even know where that could be coming from. Here is my code so far:
#Imports
import sys as pygame
import pygame as pg
from random import randint, uniform
vec = pg.math.Vector2
#Player variables
WIDTH = 1200
HEIGHT = 660
FPS = 60
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)
YELLOW = (255, 255, 0)
DARKGRAY = (40, 40, 40)
#----------------------------------------------------------------------------
# Player properties
Player_SIZE = 32
MAX_SPEED = 5
MAX_FORCE = 0.5
APPROACH_RADIUS = 100
all_sprites = pg.sprite.Group()
class Player(pg.sprite.Sprite):
def __init__(self):
self.groups = all_sprites
pg.sprite.Sprite.__init__(self, self.groups)
self.image = pg.Surface((Player_SIZE, Player_SIZE))
self.image.fill(BLUE)
self.rect = self.image.get_rect()
self.pos = vec(randint(0, WIDTH), randint(0, HEIGHT))
self.vel = vec(MAX_SPEED, 0).rotate(uniform(0, 360))
self.acc = vec(0, 0)
self.rect.center = self.pos
def follow_mouse(self):
mpos = pg.mouse.get_pos()
self.acc = (mpos - self.pos).normalize() * 0.5
def seek(self, target):
self.desired = (target - self.pos).normalize() * MAX_SPEED
steer = (self.desired - self.vel)
if steer.length() > MAX_FORCE:
steer.scale_to_length(MAX_FORCE)
return steer
def seek_with_approach(self, target):
self.desired = (target - self.pos)
dist = self.desired.length()
self.desired.normalize_ip()
if dist < APPROACH_RADIUS:
self.desired *= dist / APPROACH_RADIUS * MAX_SPEED
else:
self.desired *= MAX_SPEED
steer = (self.desired - self.vel)
if steer.length() > MAX_FORCE:
steer.scale_to_length(MAX_FORCE)
return steer
def update(self):
# self.follow_mouse()
self.acc = self.seek_with_approach(pg.mouse.get_pos())
# equations of motion
self.vel += self.acc
if self.vel.length() > MAX_SPEED:
self.vel.scale_to_length(MAX_SPEED)
self.pos += self.vel
if self.pos.x > WIDTH:
self.pos.x = 0
if self.pos.x < 0:
self.pos.x = WIDTH
if self.pos.y > HEIGHT:
self.pos.y = 0
if self.pos.y < 0:
self.pos.y = HEIGHT
self.rect.center = self.pos
#Enemy properties
MAX_SPEED1 = 4.5
ppos = pg.mouse.get_pos()
class Enemy(pg.sprite.Sprite):
def __init__(self):
self.groups = all_sprites
pg.sprite.Sprite.__init__(self, self.groups)
self.image = pg.Surface((Player_SIZE, Player_SIZE))
self.image.fill(RED)
self.rect = self.image.get_rect()
self.pos = vec(randint(0, WIDTH), randint(0, HEIGHT))
self.vel = vec(MAX_SPEED1, 0).rotate(uniform(0, 360))
self.acc = vec(0, 0)
self.rect.center = self.pos
def follow_player(self):
self.acc = (ppos - self.pos).normalize() * 0.5
def seek(self, target):
self.desired = (ppos - self.pos).normalize() * MAX_SPEED1
steer = (self.desired - self.vel)
if steer.length() > MAX_FORCE:
steer.scale_to_length(MAX_FORCE)
return steer
def seek_with_approach(self, target):
self.desired = (ppos() - self.pos)
dist = self.desired.length()
self.desired.normalize_ip()
if dist < APPROACH_RADIUS:
self.desired *= dist / APPROACH_RADIUS * MAX_SPEED
else:
self.desired *= MAX_SPEED1
steer = (self.desired - self.vel)
if steer.length() > MAX_FORCE:
steer.scale_to_length(MAX_FORCE)
return steer
def update(self):
# self.follow_mouse()
self.acc = self.seek_with_approach(Player)
# equations of motion
self.vel += self.acc
if self.vel.length() > MAX_SPEED1:
self.vel.scale_to_length(MAX_SPEED1)
self.pos += self.vel
if self.pos.x > WIDTH:
self.pos.x = 0
if self.pos.x < 0:
self.pos.x = WIDTH
if self.pos.y > HEIGHT:
self.pos.y = 0
if self.pos.y < 0:
self.pos.y = HEIGHT
self.rect.center = self.pos
#----------------------------------------------------------------------------
#Display
pg.init()
screen = pg.display.set_mode((WIDTH, HEIGHT))
clock = pg.time.Clock()
pg.display.set_caption("Maze")
Icon = pg.image.load('Logo.png')
pg.display.set_icon(Icon)
#Main loop
all_sprites = pg.sprite.Group()
Player()
Enemy()
paused = False
running = True
while running:
clock.tick(FPS)
for event in pg.event.get():
if event.type == pg.QUIT:
running = False
if event.type == pg.KEYDOWN:
if event.key == pg.K_SPACE:
paused = not paused
if event.key == pg.K_m:
Player()
Enemy()
if not paused:
all_sprites.update()
screen.fill(DARKGRAY)
all_sprites.draw(screen)
pg.display.flip()
pg.quit()
I know it's long but Ireally dont know where the problem could be coming from.
Any help? (There is no problem with the indent im only having trouble pasting the code here)

Answer 1

You have to call pygame.init() before you can use pygame.mouse.get_pos(); or, in your case, pg.init(), since you imported pygame as pg.
I don't know why you import sys as pygame; that quite confusing.
Also, getting the mouse position once that the start of your game is not helpful. Everytime you want to know the mouse position, you should call .mouse.get_pos() again.