[Python] How to pass a screen as a parameter in python

I've been writing some code for moving cards around and putting them in decks, hopefully so that soon I can start working on programming an actual card game. I have 2 classes so far, Card and Deck, and they each have a method called Render whose job is, when called, to draw the card on the screen.

This is how I initialized the screen:

screen = pygame.display.set_mode((1280, 720))


This is how the Render method is coded (it's virtually identical for both classes):

def Render(self):

pygame.draw.rect(screen, self.color, self.rect_obj)


Here's an example of how I'm calling it:

for deck in decks:
deck.Render()

for card in active_cards:
card.Render()


This code works just fine. But I want to move those classes into a different file to clean up the main file, and in order to do this I need to be able to pass the screen into this method somehow since it obviously isn't defined in the other file. I'd prefer to do this rather than just hard-coding the render into the main loop itself. Here's the version of the code that I attempted, but it didn't work:

Render method defined in separate file:

def Render(self, screen):

pygame.draw.rect(screen, self.color, self.rect_obj)


Example call (after importing the other file):

for deck in decks:
deck.Render(screen)

for card in active_cards:
card.Render(screen)


This code doesn't work. The window simply starts up, freezes, and then crashes. I don't get an actual error in the console. What's going on? What's the best way to accomplish what I'm trying to accomplish?

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