human
Solve the following python programming problem given the following code:
def fixed_arity(func_name, arity) : 
    def formatter(translator, expr) : 
        op = expr.op () 
        if (arity != len (op.args)) : 
            raise com.IbisError ('incorrect number of args') 
return _format_call (translator, func_name, * op.args) 
return func_name 

    
    

    Fix the buggy line: return func_name
assistant
#Here is Python code to fix the buggy line: return func_name
.

return def formatter(