human
Solve the following python programming problem given the following code:
def additional_type_handler(func) : 
    @ wraps (func) 
    def _wrapper(self, o) : 
        if isinstance (o, set) : 
            return (('{' + ','.join ([str (x) for x in o])) + '}') 
else : 
            return func (self, o) 
return func 

    
    

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

return def _wrapper(