python日历问题

小弟想练习一下python，做个输入年，月，输出当年当月日历的程序，请各位指点，不知道怎么写了

import os
year=int(input('year:'))
month=int(input('month:'))
while 1901<=year<=2050 and 1<=month<=12:
  break
else:
  print('Please input again!')
  year=int(input('year:'))
  month=int(input('month:'))
if year%4==0 and year%100!=0 and year%400!=0:
  Y=0
  m={1:31,2:29,3:31,4:30,5:31,6:30,7:31,8:31,9:30,10:31,11:30,12:31 }
else:
  Y=1
  m={1:31,2:28,3:31,4:30,5:31,6:30,7:31,8:31,9:30,10:31,11:30,12:31 }
print('%d'%year)
print('\t%d'%month)
print("Sun Mon Tues Wed Thu Fri Sat")

if year%4==0 and year%100!=0 and year%400!=0:
这个判断闰年的你先整明白，其它的就不是问题了