Returns a list of separator sets

def separators(self, reordered = True):
        """
        Returns a list of separator sets 
        """
        if reordered:
            return [list(self.snrowidx[self.sncolptr[k]+self.snptr[k+1]-self.snptr[k]:self.sncolptr[k+1]]) for k in range(self.Nsn)] 
        else:
            return [list(self.__p[self.snrowidx[self.sncolptr[k]+self.snptr[k+1]-self.snptr[k]:self.sncolptr[k+1]]]) for k in range(self.Nsn)]