numpy.ma.MaskedArray.__copy__
method
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MaskedArray.__copy__()
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Used if copy.copyis called on an array. Returns a copy of the array.Equivalent to a.copy(order='K').
    © 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.__copy__.html