Megaman 8 Bits Lego blocks counter

import Image
im = Image.open('/home/gilisk/Download/MegaMan_8bits.gif','r')
px = im.load()

for row in range(im.size[0]):
	_row_ = {}
	for column in range(im.size[1]):
		p = px[row, column]
		if not p in _row_:
			_row_[p] = 1
		else:
			_row_[p] += 1
	colors[row] = _row_