numpy.ma.MaskedArray.__getitem__
method
- 
MaskedArray.__getitem__(self, indx)[source] - 
x.__getitem__(y) <==> x[y]
Return the item described by i, as a masked array.
 
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Licensed under the 3-clause BSD License.
    https://numpy.org/doc/1.18/reference/generated/numpy.ma.MaskedArray.__getitem__.html