def _op_maker(op_class, op_symbol):
 def f(self, node, *args, **kwargs):
  'Return a partial function with an Op subclass with an operator\n        already passed.\n\n        Returns\n        -------\n        f : callable\n        '
  return partial(op_class, op_symbol, *args, **kwargs)
 return f

def _op_maker ( op_class , op_symbol ) : def f ( self , node , * args , ** kwargs ) : return partial ( op_class , op_symbol , * args , ** kwargs ) return f
return a function to create an op class with its symbol already passed .