def test_simple_exact(self):
        for dtype in REAL_DTYPES:
            a = np.array([[1,20], [-30,4]], dtype=dtype)
            for lapack_driver in TestLstsq.lapack_drivers:
                    for overwrite in (True, False):
                        for bt in (((1,0),(0,1)), (1,0),((2,1),(-30,4))):
                            # Store values in case they are overwritten
                            # later
                            a1 = a.copy()
                            b = np.array(bt, dtype=dtype)
                            b1 = b.copy()
                            try:
                                out = lstsq(a1, b1, lapack_driver=lapack_driver,
                                            overwrite_a=overwrite,
                                            overwrite_b=overwrite)
                            except LstsqLapackError:
                                if lapack_driver is None:
                                    mesg = ('LstsqLapackError raised with '
                                            'lapack_driver being None.')
                                    raise AssertionError(mesg)
                                else:
                                    # can't proceed, skip to the next iteration
                                    continue

                            x = out[0]
                            r = out[2]
                            assert_(r == 2,
                                    'expected efficient rank 2, got %s' % r)
                            assert_allclose(dot(a, x), b,
                                            atol=25 / np.finfo(a1.dtype).eps,
                                            rtol=25 * np.finfo(a1.dtype).eps,
                                            err_msg="driver: %s" % lapack_driver)
dataset/ETHPy150Open scipy/scipy/scipy/linalg/tests/test_basic.py/TestLstsq.test_simple_exact/operator `*` -> `/`