print(intro_str)
var = 0
while var != 5:
print(menu_str)
def one():
printCountries()
def two():
addCountry()
def three():
byCountry()
def four():
byPopulation()
def five():
print("Thank you, goodbye")
raise SystemExit
switcher = {1: one, 2: two, 3: three, 4: four, 5: five}
def user_choice(arg1):
func = switcher.get(arg1)
return func()
choice = Validator.inputNumber("Selection: ")
user_choice(choice)
