[Python] Console Menu Generator in Python

As the title says, I'm writing a Console Menu Generator in Python. I have 2 classes, Menu and Item. But I get into troubles. Here is the code:

class Menu:
def AddItem(self,item):
class Item:
def __init__(self,text,ToDoNext):
self.text=text
??????????????
self.item.append(Item())
def Show():
for i in range(len(self.item)):
print(str(i+1)+") "+str(self.item)+"\n")
print("0) Back\n")
option=int(input())
self.item[option].????????????


This code basically do the next:

Main=Menu()
Menu.AddItem("Open file",ToDo1)
Menu.AddItem("Save file",ToDo2)
Menu.Show()

'''1) Open file
2) Save file
0) Back
_
'''


If I write 1 and press enter should do the portion of code ToDo1, for example. The solution that I thought is the nextone:

def ToDo1():
print("Hello, world!")
Menu.AddItem("Say Hello","ToDo1()")


and use an eval() function inside the Show().

But I'm not pretty sure this is not the correct way to do that.

I would like you to show me a better way, and if you have ever do something like that (Console Menu Generator) to share the code and see another way of doing the same.

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