code: def _set_scaling(self, x):
      self._vec12[6:9] = np.log(x)
  
imports: import numpy
  import scipy.linalg
  from nibabel.affines import apply_affine
  from transforms3d.quaternions import mat2quat, quat2axangle
  from .transform import Transform
label_desc: Use image node_id 12 for calling the Affine obj's underlying member method code with example usage: obj._set_scaling(x) without return types