code: def reset( self ):
          
          self.number_of_hops = 0
          self.dr = np.array( [ 0.0, 0.0, 0.0 ] )
          self.summed_dr2 = 0.0
          self.sites_visited = [ self._site.number ]
docs: Reinitialise the stored displacements, number of hops, and list of sites visited for this `Atom`.
  
          Args:
              None
  
          Returns:
              None