def __init__ (self,binsize=8000,chromosomesize=1e9):
        """Initializer.

        Parameters:
        binsize : size of bin in Basepair
        chromosomesize : size of chromosome, default is 1G
        """
        self.binsize = binsize
        self.binnumber = int(self.binsize/chromosomesize)+1
        self.cage = []
        a = self.cage.append
        for i in xrange(self.binnumber):
            a([array(BYTE4,[]),array(FBYTE4,[])])
dataset/ETHPy150Open taoliu/taolib/CoreLib/BinKeeper/__init__.py/BinKeeperI.__init__/swapped operands of `/`