code: def create_hpx(cls, nside, nest, coordsys='CEL', order=-1, ebins=None,
                     region=None, conv=HPX_Conv('FGST_CCUBE'), pixels=None):
          
          return cls(nside, nest, coordsys, order, ebins, 
                     region=region, conv=conv, pixels=pixels)
docs: Create a HPX object.
  
          Parameters
          ----------
          nside    : int
             HEALPix nside paramter
  
          nest     : bool
             True for HEALPix "NESTED" indexing scheme, False for "RING" scheme.
  
          coordsys : str
             "CEL" or "GAL"
  
          order    : int
             nside = 2**order
  
          ebins    : `~numpy.ndarray`
              Energy bin edges
  
          region   : str
              Allows for partial-sky mappings
  
          conv     : `HPX_Conv`
              Object defining the convention for column names and the like
              
          pixels   : `np.array` or `None`
              For use with 'EXPLICIT' region string