code: def test_integ_coeffs(self):
      p = np.poly1d([3, 2, 1])
      p2 = p.integ(3, k=[9, 7, 6])
      assert_(
          (
              p2.coeffs
              == [
                  1 / 4.0 / 5.0,
                  1 / 3.0 / 4.0,
                  1 / 2.0 / 3.0,
                  9 / 1.0 / 2.0,
                  7,
                  6,
              ]
          ).all()
      )
  
imports: import numpy
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_almost_equal, assert_array_almost_equal, assert_raises, assert_allclose
  import pytest
label_desc: Use image node_id 12 for calling the TestPolynomial obj's underlying member method code with example usage: obj.test_integ_coeffs() without return types