1  class Bitmap:
 2      def __init__(self, width, height, color_count):
 3          self.width = width
 4          self.height = height
 5          if color_count > 255:
 6              raise ValueError("Cannot support that many colors")
 7          self.values = bytearray(width * height)
 8  
 9      def __setitem__(self, index, value):
10          if isinstance(index, tuple):
11              index = index[0] + index[1] * self.width
12          self.values[index] = value
13  
14      def __getitem__(self, index):
15          if isinstance(index, tuple):
16              index = index[0] + index[1] * self.width
17          return self.values[index]
18  
19      def __len__(self):
20          return self.width * self.height