docstr: quaternion format (w, x, y, z)
docstr_tok: ["quaternion","format","(","w",",","x",",","y",",","z",")"]
code: def quaternion(self):
      """
      quaternion format (w, x, y, z)
      """
      return self.r.quaternion
  
imports: import numpy
  from geometry import transformations
  from geometry.basics import Translation, Rotation, UnstableRotation
label_desc: Use image node_id 7 for calling the CameraPose obj's underlying member method code with example usage: obj.quaternion() and returns: self