code: def pipe_union(context=None, _INPUT=None, conf=None, **kwargs):
      
      _OUTPUT = get_output(_INPUT, **kwargs)
      return _OUTPUT
docs: An operator that merges multiple source together. Not loopable.
  
      Parameters
      ----------
      context : pipe2py.Context object
      _INPUT :  pipe2py.modules pipe like object (iterable of items)
      conf : unused
  
      Keyword arguments
      -----------------
      _OTHER1 : pipe2py.modules pipe like object
      _OTHER2 : etc.
  
      Returns
      -------
      _OUTPUT : generator of items