How to make an imported module blit onto a surface from the main script?

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Add an additional parameter for the target surface to the function:

def draw(target, image, x, y):
    target.blit(image, (x, y))

Pass win to the draw function:

draw(win, image, x, y)

Alternatively, you can create a variable in the module’s global namespace:

draw.py

traget = None

def draw(image, x, y):
    traget.blit(image, (x, y))

Use the module:

import pygame
import draw

# [...]

draw.target = win

# [...]

draw.draw(image, x, y)

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