#!/usr/bin/env python3.0

def switch(value, d):
    try:
        d[value]()
    except KeyError:
        d["default"]()

def my_switch(value):
    switch(value, {
        1 : (lambda: print("hello")),
        2 : (lambda: print("goodbye")),
        "default" : (lambda: print("default"))
    })

my_switch(1)
my_switch(2)
my_switch(3)