code: def test_var_sets_maskedarray_scalar(self):
      # Issue gh-2757
      a = np.ma.array(np.arange(5), mask=True)
      mout = np.ma.array(-1, dtype=float)
      a.var(out=mout)
      assert_(mout._data == 0)
  
file_path: catboost/contrib/python/numpy/py3/numpy/ma/tests/test_regression.py
imports: import numpy
  from numpy.testing import assert_, assert_array_equal, assert_allclose, suppress_warnings
label_desc: Use image node_id 9 for calling the TestRegression obj's underlying member method code with example usage: obj.test_var_sets_maskedarray_scalar() without return types