Jill is developing an image processing program that creates artworks with random colors. The inputs to the program are the width and height of a new image, and the name of a file to which the image should be saved. Here is the code for Jill$$s program:

from images import Image

import random

def main$()$:

$"""$Generates and saves images with random colors.

Inputs: The image's width, height,

and output file name."""

width $=$ int$($input$("$Enter the image's width: $"))$

height $=$ int$($input$("$Enter the image's height: $"))$

fileName $=$ input$("$Enter the image's file name: $")$

# Create a table of $256$ unique colors for GIF image

colors $=[]$

while len$($colors$)<255$:

r $=$ random.randint$(0,255)$

g $=$ random.randint$(0,255)$

b $=$random.randint$(0,255)$

if not $($r$,$ g$,$ b$)$ in colors:

colors.append$(($r$,$ g$,$ b$))$

image $=$ Image$($width$,$ height$)$

for y in range$($image$.$getHeight$())$:

for x in range$($image$.$getWidth$())$:

color $=$ random.choice$($colors$)$

image.setPixel$($x$,$ y$,$ color$)$

print$("$Close the image window to quit. $")$

image.draw$()$

image.save$($fileName$)$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

main$()$

When Jill runs the program, she enters her inputs and views the image before it$$s saved. But when she closes the window and the program attempts to save the image, Python raises an error that the image has too many colors, as shown in Figure $8-18.$

Python program that creates and saves artwork with random colors. In the IDLE shell window, the random art dot p y program executes. The following prompts are displayed. Enter the image

Figure $8-18$

Determine why this error occurs and correct it$.$ Jack reminds Jill that the GIF format supports at most $256$ unique colors.