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

问题

In my main file I have a surface called win. I import a module like so from draw import *.

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

This is a function from draw. It doesn't work because win is not defined. How to make it defined?

回答1:

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)

来源：https://stackoverflow.com/questions/65620655/how-to-make-an-imported-module-blit-onto-a-surface-from-the-main-script