Python如何实现一个位图索引

class Bitmap(object):def __init__(self, max):	self.size  = self.calcElemIndex(max, True)	self.array = [0 for i in range(self.size)]def calcElemIndex(self, num, up=False):	'''up为True则为向上取整, 否则为向下取整'''	if up:		return int((num + 31 ) / 31) #向上取整	return num / 31	def calcBitIndex(self, num):	return num % 31	def set(self, num):	elemIndex = int(self.calcElemIndex(num))	byteIndex = self.calcBitIndex(num)	elem      = self.array[elemIndex]	self.array[elemIndex] = elem | (1 << byteIndex)		def clean(self, i):	elemIndex = int(self.calcElemIndex(i))	byteIndex = self.calcBitIndex(i)	elem      = self.array[elemIndex]	self.array[elemIndex] = elem & (~(1 << byteIndex))def test(self, i):	elemIndex =int(self.calcElemIndex(i))	byteIndex = self.calcBitIndex(i)	if self.array[elemIndex] & (1 << byteIndex):		return True	return FalseMAX = 879suffle_array = [45, 2, 78, 35, 67, 90, 879, 0, 340, 123, 46]result       = []bitmap = Bitmap(MAX)for num in suffle_array:bitmap.set(num)for i in range(MAX + 1):if bitmap.test(i):	result.append(i)print ('原始数组为:    %s' % suffle_array)print ('排序后的数组为: %s' % result)