Why is this is randrange not working/ is working and have written my code wrong?

I have made a snake game but the food sometimes generates inside the snake tail the solution I came up with was this.

def Food(snake_List, food_placed, foodX, foodY):
    while food_placed == False:
        foodX = round(random.randrange(0,display_width))
        foodY = round(random.randrange(0,display_height))
        food_pos = [foodX, foodY]
        food_placed = True
        return foodX
        return foodY
        if food_pos in snake_List:
            food_placed = False

but this doesnt work. Here is the full code

import pygame
import time
import random

pygame.init()

display_width = 600
display_height = 600
display = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption("Snake")

pureblue = (0,0,255)
purered = (255,0,0)
puregreen = (0,255,0)
red = (125,25,25)
green = (25,125,25)
white = (255,255,255)
black = (1,1,1)
grey = (20,20,20)
darkgrey = (15,15,15)


clock = pygame.time.Clock()

snake_block = 60
snake_speed = 5

font_style = pygame.font.SysFont(None, 50)

food_placed = False
foodX = 0
foodY = 0

def user_snake(snake_block, snake_List):
    for x in snake_List:
        pygame.draw.rect(display,green,[x[0],x[1], snake_block, snake_block])

def drawGrid(surf):
    blockSize = snake_block
    surf.fill(grey)
    for x in range(display_width):
        for y in range(display_height):
            rect = pygame.Rect(x*blockSize, y*blockSize,blockSize, blockSize)
            pygame.draw.rect(surf,darkgrey, rect, 1)

grid_surf = pygame.Surface(display.get_size())
drawGrid(grid_surf)

def Food(snake_List, food_placed, foodX, foodY):
    while food_placed == False:
        foodX = round(random.randrange(0,display_width))
        foodY = round(random.randrange(0,display_height))
        food_pos = [foodX, foodY]
        food_placed = True
        return foodX
        return foodY
        if food_pos in snake_List:
            food_placed = False

def message(msg, colour):
    text = font_style.render(msg, True, colour)
    display.blit(text, [0, display_height/4])

def SnakeGameLoop(foodX, foodY):
    game_over = False
    game_close = False
    X = display_width/2
    Y = display_height/2

    X_change = 0
    Y_change = 0
    
    snake_List = []
    Length_of_snake = 1
    Food(snake_List, food_placed, foodX, foodY)

    while not game_over:
        while game_close == True:
            message("You Lost! Press Q-Quit or C-Play Again", purered)
            pygame.display.update()
 
            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_over = True
                        game_close = False
                    if event.key == pygame.K_c:
                        SnakeGameLoop(foodX, foodY)
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    X_change = -snake_block
                    Y_change = 0
                elif event.key == pygame.K_RIGHT:
                    X_change = snake_block
                    Y_change = 0
                elif event.key == pygame.K_UP:
                    X_change = 0
                    Y_change = -snake_block
                elif event.key == pygame.K_DOWN:
                    X_change = 0
                    Y_change = snake_block

                if event.key == pygame.K_a:
                    X_change = -snake_block
                    Y_change = 0
                elif event.key == pygame.K_d:
                    X_change = snake_block
                    Y_change = 0
                elif event.key == pygame.K_w:
                    X_change = 0
                    Y_change = -snake_block
                elif event.key == pygame.K_s:
                    X_change = 0
                    Y_change = snake_block

        if X >= display_width or X < 0 or Y >= display_height or Y < 0:
            game_close = True

        X += X_change
        Y += Y_change
        snake_Head = []
        snake_Head.append(X)
        snake_Head.append(Y)
        snake_List.append(snake_Head)
        print(snake_List)
        if len(snake_List) > Length_of_snake:
            del snake_List[0]

        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True
        display.blit(grid_surf, (0,0))
        pygame.draw.rect(display, red, [foodX, foodY, snake_block, snake_block])
        user_snake(snake_block,snake_List)
        pygame.display.update()

        if X == foodX and Y == foodY:
            foodX = round(random.randrange(0, display_width - snake_block) / snake_block) * snake_block
            foodY = round(random.randrange(0, display_height - snake_block) / snake_block) * snake_block
            Length_of_snake += 1

        clock.tick(snake_speed)


    pygame.quit()
    quit()
SnakeGameLoop(foodX, foodY)