[False, False]])

Equivalently use the `MaskedArray` `mask` attribute.

>>> a.mask
array([[False,  True],
       [False, False]])

Result when mask == `nomask`

>>> b = ma.masked_array([[1,2],[3,4]])
>>> b
masked_array(
  data=[[1, 2],
        [3, 4]],
  mask=False,
  fill_value=999999)
>>> ma.nomask
False
>>> ma.getmask(b) == ma.nomask
True
>>> b.mask == ma.nomask
True

rn