code: def EccZmaxRperiRap(self,*args,**kwargs):
          
          try:
              return self._EccZmaxRperiRap(*args,**kwargs)
          except AttributeError: #pragma: no cover
              raise NotImplementedError("'EccZmaxRperiRap' method not implemented for this actionAngle module")
docs: NAME:
  
             EccZmaxRperiRap
  
          PURPOSE:
  
             evaluate the eccentricity, maximum height above the plane, peri- and apocenter
  
          INPUT:
  
             Either:
  
                a) R,vR,vT,z,vz[,phi]:
  
                   1) floats: phase-space value for single object (phi is optional) (each can be a Quantity)
  
                   2) numpy.ndarray: [N] phase-space values for N objects (each can be a Quantity)
  
                b) Orbit instance: initial condition used if that's it, orbit(t) if there is a time given as well as the second argument
                   
          OUTPUT:
  
             (e,zmax,rperi,rap)
  
          HISTORY:
  
             2017-12-12 - Written - Bovy (UofT)