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# numpy.ma.MaskedArray.harden_mask

method

ma.MaskedArray.harden_mask()

  Force the mask to hard, preventing unmasking by assignment.

  Whether the mask of a masked array is hard or soft is determined by its `hardmask` property. `harden_mask` sets `hardmask` to `True` (and returns the modified self).

  See also

  `ma.MaskedArray.hardmask`
  `ma.MaskedArray.soften_mask`