Python can't find class attribute - python-2.7

Question

I've hit a block when making a pygame project. the display.py file cant find the render() attribute in the player.py file.
Traceback (most recent call last):
File "C:\Users\ethan\Desktop\pyprojects\pygame\display.py", line 34, in <module>
player.render(screen)
AttributeError: Player instance has no attribute 'render'
I tried removing the reference to rendering the player. and it worked, plus the screen rendered properly. when I put the reference back in, the screen didn't render properly, and crashed all together
It would be greatly appreciated if you could help me.
here's the code:
Windows 10
Python-2.7
pygame-1.9.3
display.py
import pygame
from player import *
import sys
pygame.init()
black = (0,0,0)
red = (255,0,0)
green = (0,255,0)
blue = (0,0,255)
white = (255,255,255)
screen_x = 800
screen_y = 600
screen = pygame.display.set_mode([screen_x, screen_y])
pygame.display.set_caption("Test")
clock = pygame.time.Clock()
player = Player(0,0)
gameLoop = True
while gameLoop:
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameLoop = False
print(event)
clock.tick(30)
pygame.display.update()
player.render(screen)
screen.fill(white)
pygame.quit()
player.py
import pygame
from display import *
import sys
class Player:
def __init__(self, x, y):
self.x = x
self.y = y
self.width = 32
self.height = 32
def render(self, window):
pygame.draw.rect(window, (0,0,255), (self.x, self.y, self.width, self.height))
again thanks!

Answer 1

I get a different error:
player = Player(0,0)
NameError: name 'Player' is not defined
That happens because you import from display in the player.py file and that runs the display.py file before the Player is defined in player.py.
You could put the code inside display.py into a main function and call it in a special if clause:
if __name__ == '__main__':
main()
That makes sure that the main function doesn't run when the display module gets imported.
Or you could remove the line from display import * in the player module. If there are things that both the player and display modules need, put them into another separate module.