python 新手求指导习题.

超出索引了,month_number-1 已经不在months这个list的索引范围了,3。3我没用过,但是看你的months写个估计有问题,难道3。3支持list里面不加逗号?估计你在每个月份后面加个逗号就好了……起码这里能过去,后面过不过得去就不好说了,我用的2。7。3给你改了下整体的代码#根据给定的年月日以数字形式打印出日期months = [ 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December' ] #以1~31的数字作为结尾的列表endings = ['st', 'nd', 'rd'] + 17 * ['th']\ +['st', 'nd' ,'rd'] + 7 * ['th']\ +['st'] year = input('Year: ')month = input('Moth (1-12): ')day = input ('Day(1-31): ') month_number = int(month)day_number = int(day)#记得要将月份和天数减一,以获得正确的引索month_name = months[month_number-1]ordinal = str(day) + endings[day_number-1] print(month_name + ' ' +ordinal + ',' + str(year))其实上面输入的day、month和year已经是int类型了,不用再转换了,下面拼接字符串要注意类型,int类型不能和str类型直接拼接,要么转成str,要么格式化输出'%s %s %s' % (year,month,day)