code: def nemo_accpars(Pot,vo,ro):
      
      Pot= flatten(Pot)
      if isinstance(Pot,list):
          out= ''
          for ii,pot in enumerate(Pot):
              if ii > 0: out+= '#'
              out+= pot.nemo_accpars(vo,ro)
          return out
      elif isinstance(Pot,Potential):
          return Pot.nemo_accpars(vo,ro)
      else: #pragma: no cover 
          raise PotentialError("Input to 'nemo_accpars' is neither a Potential-instance or a list of such instances")
docs: NAME:
      
         nemo_accpars
      
      PURPOSE:
      
         return the accpars potential parameters for use of this potential or list of potentials with NEMO
      
      INPUT:
      
         Pot - Potential instance or list of such instances
  
         vo - velocity unit in km/s
      
         ro - length unit in kpc
      
      OUTPUT:
      
         accpars string in the corrct format to give to accpars
      
      HISTORY:
      
         2014-12-18 - Written - Bovy (IAS)