Use variable from one function in another without return

[stullis]

To implement these with the class, the functions need to be methods of the class and todos_print() will need to use self.tdate. From what I'm seeing, it appears that you intend to make a list of todo items. In that case, you should have a second class to contain and manage that list. Something like this:

class Todo_list:
    todos = []

    def add_todo_item(self, todo):
        if isinstance(todo, tclass):
            self.todos.append(todo)

    def print_todo_list(self):
        print(self.todos)