old_contents: import math as m
  class actionAngle:
      """Top-level class for actionAngle classes"""
      def __init__(self,*args,**kwargs):
          """
          NAME:
             __init__
          PURPOSE:
             initialize an actionAngle object
          INPUT:
          OUTPUT:
          HISTORY:
             2010-07-11 - Written - Bovy (NYU)
          """
          if len(args) == 3: #R,vR.vT
              R,vR,vT= args
              self._R= R
              self._vR= vR
              self._vT= vT
          elif len(args) == 5: #R,vR.vT, z, vz
              R,vR,vT, z, vz= args
              self._R= R
              self._vR= vR
              self._vT= vT
              self._z= z
              self._vz= vz
          elif len(args) == 6: #R,vR.vT, z, vz, phi
              R,vR,vT, z, vz, phi= args
              self._R= R
              self._vR= vR
              self._vT= vT
              self._z= z
              self._vz= vz
              self._phi= phi
          else:
              if len(args) == 2:
                  vxvv= args[0](args[1]).vxvv
              else:
                  vxvv= args[0].vxvv
              self._R= vxvv[0]
              self._vR= vxvv[1]
              self._vT= vxvv[2]
              if len(vxvv) > 3:
                  self._z= vxvv[3]
                  self.vz= vxvv[4]
                  self._phi= vxvv[5]
          if hasattr(self,'_z'): #calculate the polar angle
              if self._z == 0.: self._theta= m.pi/2.
              else: self._theta= m.atan(self._R/self._z)
          return None
  
  class UnboundError(Exception):
      def __init__(self, value):
          self.value = value
      def __str__(self):
          return repr(self.value)
  
new_contents: import math as m
  class actionAngle:
      """Top-level class for actionAngle classes"""
      def __init__(self,*args,**kwargs):
          """
          NAME:
             __init__
          PURPOSE:
             initialize an actionAngle object
          INPUT:
          OUTPUT:
          HISTORY:
             2010-07-11 - Written - Bovy (NYU)
          """
          if len(args) == 3: #R,vR.vT
              R,vR,vT= args
              self._R= R
              self._vR= vR
              self._vT= vT
          elif len(args) == 5: #R,vR.vT, z, vz
              R,vR,vT, z, vz= args
              self._R= R
              self._vR= vR
              self._vT= vT
              self._z= z
              self._vz= vz
          elif len(args) == 6: #R,vR.vT, z, vz, phi
              R,vR,vT, z, vz, phi= args
              self._R= R
              self._vR= vR
              self._vT= vT
              self._z= z
              self._vz= vz
              self._phi= phi
          else:
              if len(args) == 2:
                  vxvv= args[0](args[1]).vxvv
              else:
                  vxvv= args[0].vxvv
              self._R= vxvv[0]
              self._vR= vxvv[1]
              self._vT= vxvv[2]
              if len(vxvv) > 3:
                  self._z= vxvv[3]
                  self._vz= vxvv[4]
                  self._phi= vxvv[5]
          if hasattr(self,'_z'): #calculate the polar angle
              if self._z == 0.: self._theta= m.pi/2.
              else: self._theta= m.atan(self._R/self._z)
          return None
  
  class UnboundError(Exception):
      def __init__(self, value):
          self.value = value
      def __str__(self):
          return repr(self.value)
  
subject: fix parsing of Orbit instances in actionAngle framework