def hello(name):
	print(f"hello, {name}. Nice to see you.")
	
def bye(name):
	print(f"Bye, {name}. See you next time.")	

def hello_bye(name):
	
hello('Yue') 
bye('Yue')

my_func = hello
my_func('Yue')
my_func('Bun')
my_func = bye
my_func('Yue')
my_func('Bun')

greetings = {
    "hello": hello,
    "bye": bye
}

greetings["hello"]("Jane")
greetings["bye"]("Jane")