human
Solve the following python programming problem given the following code:
def requires_login(f) : 
    @ wraps (f) 
    def decorated_function(* args, **kwargs) : 
        if (g.user is None) : 
            flash ('You need to be signed in for this page.') 
            return redirect (url_for ('frontends.login', next = request.path)) 
return f (* args, ** kwargs) 
return f 

    
    

    Fix the buggy line: return f
assistant
#Here is Python program to fix the buggy line: return f
.

return def decorated_function(