Question

   For each pixel in pic:
    r= random()      
    if r < 0.25:       
    set the red level to randrange(0,256), 
    set the green level to randrange(0,256) 
    set the blue level to randrange(0,256)

The rest of the unseen code is correct, I just can’t figure out how to phrase this function well enough for it to work.

Answer 1

I don’t know anything about the rest of your code, but it would be something like this:

import random

for pixel in pic.get_pixels(): # Replace with appropiate way of getting the pixels
    if random.random() < 0.25:
        pixel.red = random.randint(256)
        pixel.green = random.randint(256)
        pixel.blue = random.randint(256)

Again, I don’t know how you get a list of the pixels, or how you set the RGB values for each one, but the result would be something like this.