PIL compatibles's .act color palette.

act.py

from struct import unpack

class Palette:
    color_length = 3

    def __init__(self, fp):
        self.palette = []

        for i in range(256):
            color = fp.read(self.color_length)
            if not color:
                break
            if len(color) != self.color_length:
                raise SyntaxError, "Bad Photoshop palette file!"
            for item in unpack("ccc", color):
                self.palette.append(ord(item))
        fp.close()

    def getpalette(self):
        return self.palette