pymp1_func.py

def get_most_popular_color(image_path:str) -> tuple:
    """ Loads the path to an image and returns most prevalent color as a tuple:
        (the image_path, rgb-color, % of pixels with this color)
        NOTICE: This is unoptimized code: this is used as an example for demonstrating multiprocessing
    """

    # 1. Load the image and pixels
    img = Image.open(image_path)
    pixels = img.load()

    # 2. Image details
    img_width, img_height = img.size  # Get the width and hight of the image for iterating over
    image_pixel_count = img_width * img_height

    # 3. Loop over all pixels, round the pixels and count them in a dict)
    rgb_count_dict:{tuple, int} = {}
    for x in range(img_width):
        for y in range(img_height):
            r,g,b = pixels[x,y]
            r = 10 * round(r/10)
            g = 10 * round(g/10)
            b = 10 * round(b/10)
            rgb = (r, g, b)
            if (rgb not in rgb_count_dict.keys()):
                rgb_count_dict[rgb] = 0
            rgb_count_dict[rgb] += 1

    # 4. Sort the rgb_count_dict by the count
    sorted_rgb_count_dict = {k: v for k, v in sorted(rgb_count_dict.items(), key=lambda item: item[1], reverse=True)}
    most_popular_rgb = next(iter(sorted_rgb_count_dict))
    most_popular_rgb_pixelcount = rgb_count_dict.pop(most_popular_rgb)
    return  image_path, most_popular_rgb, most_popular_rgb_pixelcount / image_pixel_count

I'm confused, what I need is:
#some code
funtionthatneedstoruninthebackground()
#some more code