<gh_stars>0
#calcutate leap year

months=[0,31,28,31,30,31,30,31,31,30,31,30,31]

def is_leap(year):
    return (year%4==0) and (year%100!=0 or year%400 ==0)

def days_in_month(year,month):
    if not 1<=month <=12:
        return 'Invalid Month !'

    if month == 2 and is_leap(year):
        return 29


is_leap(2020)
days_in_month(2020,4)

#calcutate leap year

months=[0,31,28,31,30,31,30,31,31,30,31,30,31]

def is_leap(year):
    return (year%4==0) and (year%100!=0 or year%400 ==0)

def days_in_month(year,month):
    if not 1<=month <=12:
        return 'Invalid Month !'

    if month == 2 and is_leap(year):
        return 29


is_leap(2020)
days_in_month(2020,4)
#calcutate leap year