code: def setup_method(self):
      (a, b) = (np.arange(10), np.random.rand(10))
      ndtype = [("a", float), ("b", float)]
      arr = np.array(list(zip(a, b)), dtype=ndtype)
  
      mrec = fromarrays([a, b], dtype=ndtype, fill_value=(-9.0, -99.0))
      mrec.mask[3] = (False, True)
      self.data = (mrec, a, b, arr)
  
imports: import pickle
  import numpy
  import numpy.ma
  from numpy.ma import masked, nomask
  from numpy.testing import temppath
  from numpy._core.records import recarray, fromrecords, fromarrays
  from numpy.ma.mrecords import MaskedRecords, mrecarray, fromarrays, fromtextfile, fromrecords, addfield
  from numpy.ma.testutils import assert_, assert_equal, assert_equal_records
label_desc: Use image node_id 1 for calling the TestView obj's underlying member method code with example usage: obj.setup_method() without return types