First, just upload the file/image to your folder in your repl. Next, to insert an image in pygame, here is sample code:

import pygame
pygame.init()

white = (255, 255, 255)

X = 400
Y = 400

display_surface = pygame.display.set_mode((X, Y ))

set the pygame window name

pygame.display.set_caption('Image')

#load image
image = pygame.image.load(r'C:\Users\user\Pictures\test.jpg')

while True :

display_surface.fill(white) 

#pu the image to the screen
display_surface.blit(image, (0, 0)) 

for event in pygame.event.get() : 

    if event.type == pygame.QUIT : 

        pygame.quit() 

        quit() 

    pygame.display.update()

Well, I don't know what you want the image for, but

@TommyVictory below did say how to upload. To use the image in pygame, use pygame.image.load('path/to/image').

Press the three dots

Then press upload file