Get hue channel from image

get_hues.py

i=0 ; j=0
#Initialize array the will contain Hues for every pixel in image
hues = [] 
for i in range(height):
    for j in range(width):
        hue = hsv[i][j][0] #This is the hue value at pixel coordinate (i,j)
        hues.append(hue)