takes an image and renders it in a terminal when run in a terminal (256 color)

imgRenderTerm.py

from PIL import Image
import sys


COLOR_DIFF = (0, 95, 135, 175, 215, 255)
imageNM = input("Image?: ")
SCALING = int(input("Scale? (5 - high, 20 - low): "))
im = Image.open(imageNM, "r")
width, height = im.size
pixels = list(im.getdata())
buckets = []

def get256color(rgbTuple):
    #converts 'true color' to xterm-256 color number. 
    newRGB = []
    #check for greys/black/white on grey scale ramp
    if (rgbTuple[0]-10 <= rgbTuple[1] and rgbTuple[1] <= rgbTuple[0]+10 and #red is close to green
        rgbTuple[1]-10 <= rgbTuple[2] and rgbTuple[2] <= rgbTuple[1]+10 and #green is close to blue
        rgbTuple[0]-10 <= rgbTuple[2] and rgbTuple[2] <= rgbTuple[0]+10): #red is close to blue
        avgGrey = (rgbTuple[0] + rgbTuple[1] + rgbTuple[2])/3
        if avgGrey < 4:
            return 0
        elif avgGrey > 246:
            return 255
        elif int(avgGrey/10) == 24:
            return 255
        return 232+int(avgGrey/10)
    #regular colors
    for val in rgbTuple:
        for index, item in enumerate(COLOR_DIFF):
            if item == 255 or (item <= val and val < COLOR_DIFF[index+1]):
                if item == 255:
                    newRGB.append(5)
                    break
                if abs(val - item) < abs(val - COLOR_DIFF[index+1]):
                    newRGB.append(index)
                    break
                else:
                    newRGB.append(index+1)
                    break
    return 16+(36*newRGB[0])+(6*newRGB[1])+newRGB[2]
        

for y in range(int(height/SCALING)):
    buckets.append([])
    for x in range(int(width/SCALING)):
        buckets[y].append([])

for y in range(height):
     for x in range(width):
        try:
            buckets[int(y/SCALING)-1][int(x/SCALING)-1].append(pixels[width*y+x])
        except IndexError:
            print("IndexError")
            print(int(y/SCALING), int(x/SCALING), y, x)
            print(len(buckets), len(buckets[0]))
            quit()

for row in buckets:
    for index, column in enumerate(row):
        r = 0
        g = 0
        b = 0
        c = 0
        for pixel in column:
            r += pixel[0]
            g += pixel[1]
            b += pixel[2]
            c += 1
        newColumn = get256color((int(r/c), int(b/c), int(b/c)))
        sys.stdout.write("\033[48;5;" + str(newColumn) + "m  ")
    sys.stdout.write("\033[0m\n")