human
Solve the following python programming problem given the following code:
def _reduction(func_name) : 
    def formatter(translator, expr) : 
        op = expr.op () 
        (arg, where) = op.args [: 2] 
        return _reduction_format (translator, func_name, arg, where) 
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(