Days_in_month.py

def is_leap(year):
    if year % 4 == 0:
        if year % 100 == 0:
            if year % 400 == 0:
                return True
            else:
                return False
        else:
            return True
    else:
        return False

def days_in_month(year, month):
    month_days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]  

    if month>12 or month<1:
      return "Invalid month input"
    if month==2 and is_leap(year):
        return 29
    
    return month_days[month-1]
  

year = int(input("Enter a year: "))
month = int(input("Enter a month: "))
days = days_in_month(year, month)
print(days)