<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _op_maker(op_class, op_symbol):
 """Return a function to create an op class with its symbol already passed. Returns ------- f : callable """


    def f(self, node, *args, **kwargs):
        """Return a partial function with an Op subclass with an operator
        already passed.

        Returns
        -------
        f : callable
        """
        return partial(op_class, op_symbol, *args, **kwargs)
    return f