code: def __new__(cls, data, mask=nomask):
      mat = np.matrix(data)
      _data = MaskedArray.__new__(cls, data=mat, mask=mask)
      return _data
  
imports: import pickle
  import numpy
  from numpy.testing import assert_warns
  from numpy.ma.testutils import assert_, assert_equal, assert_raises, assert_array_equal
  from numpy.ma.core import masked_array, masked_values, masked, allequal, MaskType, getmask, MaskedArray, nomask, log, add, hypot, divide
  from numpy.ma.extras import mr_
label_desc: Use image node_id 1 for calling the MMatrix obj's underlying member method code with example usage: obj.__new__(cls, data, mask) and returns: _data