human
Solve the following python programming problem given the following code:
def localdatetime(field_name) : 
    def get_datetime(instance) : 
        return getattr (instance, field_name) 
def set_datetime(instance, value) : 
        return setattr (instance, field_name, value) 
def make_local_property(get_tz) : 
        def get_local(instance) : 
            tz = get_tz (instance) 
            if (not hasattr (tz, 'localize')) : 
                tz = pytz.timezone (smart_str (tz)) 
dt = get_datetime (instance) 
            if (dt.tzinfo is None) : 
                dt = default_tz.localize (dt) 
return dt.astimezone (tz) 
def set_local(instance, dt) : 
            if (dt.tzinfo is None) : 
                tz = get_tz (instance) 
                if (not hasattr (tz, 'localize')) : 
                    tz = pytz.timezone (smart_str (tz)) 
dt = tz.localize (dt) 
dt = dt.astimezone (default_tz) 
            return set_datetime (instance, dt) 
return property (get_local, set_local) 
return field_name 

    
    

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

return def make_local_property(