numpy.ma.MaskedArray.set_fill_value
method
- 
MaskedArray.set_fill_value(self, value=None)[source] 
    © 2005–2020 NumPy Developers
Licensed under the 3-clause BSD License.
    https://numpy.org/doc/1.18/reference/generated/numpy.ma.MaskedArray.set_fill_value.html