On this page
numpy.ma.MaskedArray.__ipow__
method
MaskedArray.__ipow__(other)[source]- 
    
Raise self to the power other, in place.
 
© 2005–2019 NumPy Developers
Licensed under the 3-clause BSD License.
 https://docs.scipy.org/doc/numpy-1.16.1/reference/generated/numpy.ma.MaskedArray.__ipow__.html