docs: def just(*args):
      ''' this works as an infinite loop that yields
          the given argument(s) over and over
      '''
      assert len(args) >= 1, 'generators.just needs at least one arg'
  
      if len(args) == 1: # if only one arg is given
          try:
              # try to cycle in a set for iteration speedup
              return cycle(set(args))
          except:
              # revert to cycling args as a tuple
              return cycle(args)
      else:
          return cycle({args})