day_per_month.py

for i in range(1,4):
    y=int(input('请输入年份\n'))
    m=int(input('请输入月份\n'))
    if (y%4==0&y%100!=0)|y%400==0:
        chart=[31,29,31,30,31,30,31,31,30,31,30,31]
    else:
        chart=[31,28,31,30,31,30,31,31,30,31,30,31]
    print('%d年%d月有%d天' % (y,m,chart[m-1]))