pycharm ne peut pas ouvrir le fichier image

J'essaye de coder une calculatrice python, voici mon code

/usr/local/bin/python3.7 /Users/oscar/Desktop/python_calculator/main.py
pygame 1.9.6
Traceback (most recent call last):
Hello from the pygame community. https://www.pygame.org/contribute.html
  File "/Users/oscar/Desktop/python_calculator/main.py", line 8, in <module>
    one = Item.Item('/images/numbers/1.png',       "1",       200, 200) # here is where you specify the image file name ( must be exact!)
  File "/Users/oscar/Desktop/python_calculator/Item.py", line 14, in __init__
    self.image = pygame.image.load(os.path.join(img_name))
pygame.error: Couldn't open /images/numbers/1.png

Process finished with exit code 1

et voici item.py:

import pygame
import os
global items

items = pygame.sprite.Group()

class Item(pygame.sprite.Sprite):
    global hide

    # the constructor
    def __init__(self, img_name, name, x, y):
        pygame.sprite.Sprite.__init__(self, items)
        self.image = pygame.image.load(os.path.join(img_name))
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y
        self.name = name;
        self.hide = False

    # to display on game panel
    def display(self, surface):
        if self.hide == False:
            surface.blit(self.image, self.rect)

mais quand je l'exécute sur pycharm, il arrive avec ceci:

main.py:
import pygame
import os
import Item
global items


one = Item.Item('/images/numbers/1.png',       "1",       200, 200) # here is where you specify the image file name ( must be exact!)
two = Item.Item('/images/numbers/2.png',       "2",       200, 200) # here is where you specify the image file name ( must be exact!)
three = Item.Item('/images/numbers/3.png',       "3",       200, 200) # here is where you specify the image file name ( must be exact!)
four = Item.Item('/images/numbers/4.png',       "4",       200, 200) # here is where you specify the image file name ( must be exact!)
five = Item.Item('/images/numbers/5.png',       "5",       200, 200) # here is where you specify the image file name ( must be exact!)
six = Item.Item('/images/numbers/6.png',       "6",       200, 200) # here is where yo specify the image file name ( must be exact!)
seven = Item.Item('/images/numbers/7.png',       "7",       200, 200) # here is where you specify the image file name ( must be exact!)
eight = Item.Item('/images/numbers/8.jpg',       "8",       200, 200)# here is where you specify the image file name ( must be exact!)
nine = Item.Item('/images/numbers/9.png',       "9",       200, 200)# here is where you specify the image file name ( must be exact!)
ten = Item.Item('/images/numbers/0.jpg',       "0",       200, 200)# here is where you specify the image file name ( must be exact!)
plus = Item.Item('/images/sim/+.png',       "+",       200, 200)# here is where you specify the image file name ( must be exact!)
minus = Item.Item('/images/sim/-.png',       "-",       200, 200

j'ai téléchargé pygame et j'ai essayé d'exécuter le code de quelqu'un d'autre avec est très similaire et cela fonctionne et ne trouve pas dehors pourquoi Aidez-moi, s'il vous plaît Merci