code: def vpack(x, y, z):
      
      x = ctypes.c_double(x)
      y = ctypes.c_double(y)
      z = ctypes.c_double(z)
      vout = stypes.emptyDoubleVector(3)
      libspice.vpack_c(x, y, z, vout)
      return stypes.cVectorToPython(vout)
docs: Pack three scalar components into a vector.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/vpack_c.html
  
      :param x: first scalar component 
      :type x: float
      :param y: second scalar component 
      :type y: float
      :param z: third scalar component 
      :type z: float
      :return: Equivalent 3-vector.
      :rtype: 3-Element Array of floats