code: def vsepg(v1, v2, ndim):
      
      v1 = stypes.toDoubleVector(v1)
      v2 = stypes.toDoubleVector(v2)
      ndim = ctypes.c_int(ndim)
      return libspice.vsepg_c(v1, v2, ndim)
docs: Find the separation angle in radians between two double
      precision vectors of arbitrary dimension. This angle is defined
      as zero if either vector is zero.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/vsepg_c.html
  
      :param v1: First vector 
      :type v1: Array of floats
      :param v2: Second vector 
      :type v2: Array of floats
      :param ndim: The number of elements in v1 and v2. 
      :type ndim: int
      :return: separation angle in radians
      :rtype: float