def __init__(self, shape, dtype, order='C', blksize=2*1024*1024):
LivePersistent.__init__(self)
# NOTE BigArray is cooperative to us - it names all helping (= not needing
# to be saved) data members starting with _v_. Were it otherwise, we
# could not inherit from BigArray and would need to keep its instance
# in e.g. ._v_array helper and redirect all BigArray method from us to it.
BigArray._init0(self, shape, dtype, order)
self.zfile = ZBigFile(blksize)
self._v_fileh = None
