def __init__(self, expr, ispace, indexeds, bases, offsets):
    self.expr = expr
    self.shifts = ispace.intervals
    self.indexeds = indexeds
    self.bases = bases
    self.offsets = offsets
def __init__(self, expr, ispace, indexeds, bases, offsets):
    self.expr = expr
    self.shifts = ispace.intervals
    self.indexeds = indexeds
    self.bases = bases
    self.offsets = offsets