一、编写英文月份词典

month_num = int(input("请输入您想要查询的月份："))
month_list = ['January','February','March','April','May','June','July','August','September','October','November','December']
print("您查询的月份单词是：", month_list[month_num - 1])

二、验证用户名是否被占用

nickname = input("请输入您想要的用户名：")
nickname_list = ['张三','李四','王五']
for name in nickname_list:if nickname == name:print("用户名已存在，请重新输入")