class_docstr: Mixin class for axpy tests 
class_docstr_tok: ["Mixin","class","for","axpy","tests"]
code: def test_y_bad_size(self):
      x = arange(12.0, dtype=self.dtype)
      y = zeros(6, x.dtype)
      with pytest.raises(Exception, match="failed for 1st keyword"):
          self.blas_func(x, y, n=3, incy=5)
  
imports: from numpy import float32, float64, complex64, complex128, arange, array, zeros, shape, transpose, newaxis, common_type, conjugate
  from scipy.linalg import _fblas
  from numpy.testing import assert_array_equal, assert_allclose, assert_array_almost_equal, assert_
  import pytest
label_desc: Use image node_id 7 for calling the BaseAxpy obj's underlying member method code with example usage: obj.test_y_bad_size() without return types