#!/usr/bin/env python
def numbers_to_string(argument):
switcher = {
0:'Zero',
1:'one',
2:'two'
}
return switcher.get(argument,'nothing')
if __name__ == '__main__':
arg = int(raw_input('Enter a number:'))
print numbers_to_string(arg)
上面是使用字典实现switch/case功能的实现