Chap2Q9.py

mo={'January':31,'February':28,'March':31,'April':30,'May':31,'June':30,
'July':31,'August':31,'September':30,'October':30,'November':30,
'December':31}
m=input("\nEnter a month:")
print('\nNumber of days in', m,'is',mo.get(m.strip(),'Enter again:'))
print("\nAll months in sorted order are as follows: ",sorted(mo))
for i in mo:
    if mo[i]==31:
        print ('\nMonth having 31 day is:',i, end=' ')
print()

v=sorted([(i,j) for j,i in mo.items()])
print('\nKey,value pairs in sorted order are:',[(j,i) for i,j in v])