16、函数实战

# 创建一个全局列表容器来存储联系人字典
persons = []

# 创建联系人
def create_person():
    name = input('name: ')
    address = input('address: ')
    phone = input('phone: ')
    person = {'name': name,  'address': address, 'phone': phone}
    persons.append(person)

# 列出所有联系人
def list_person():
    for person in persons:
        print('%s,%s,%s' % (person['name'], person['address'], person['phone']))

# 查询联系人
def query_person():
    name = input('name: ')
    for person in persons:
        if person['name'] == name:
            print('%s,%s,%s' % (person['name'], person['address'], person['phone']))

# 删除联系人
def delete_person():
    name = input('name: ')
    for person in persons:
        if person['name'] == name:
            persons.remove(person)
            break                    

# 程序菜单
def get_choice():
    print('1. create person')
    print('2. list all persons')
    print('3. query person')
    print('4. delete person')
    print('5. quit')
    choice = input('Enter a number(1-5):')  
    return choice

# 主函数
def main():
    while True:
        choice = get_choice()

        if choice == '1':
            create_person()
        elif choice == '2':
            list_person()
        elif choice == '3':
            query_person()
        elif choice == '4':
            delete_person()
        elif choice == '5':
            break
        else:
            print('Invalid choice')  

# 运行主程序
main()       

参考资料

http://www.imooc.com/wiki/pythonlesson1/function2.html