Python怎么打印日历?

Lunar=(1,3,5,7,8,10,12)

def IsleapYear(year):

    flag =False

    if(year%4==0 and year%100!=0) or year%400==0:

        flag = True

    return flag

def calculation(year,month):

    sum = 0

    s_year=1990

    while s_year < year-1:

        s_year +=1

        if IsleapYear(s_year):

            sum+=366

        else:

            sum+=365

    s_month=1

    while s_month<month:

        if s_month in Lunar:

            sum += 31

        elif s_month==2:

            if IsleapYear(year):

                sum+=29

            else:

                sum+=28

        else:

            sum+=30

        s_month+=1

    return sum

def display(sum,year,month):

    week=(sum+1)%7

    if month in Lunar:

        day=31

    elif month==2:

        if IsleapYear(year):

            day=29

        else:

            day=28

    else:

        day=30

    print("日\t一\t二\t三\t四\t五\t六")

    count = 0

    space = 0

    while space<=week:

        space+=1

        count+=1

        print("\t",end="")

        if count%7==0:

            print("\n",end="")

    days=1

    while days<=day:

        print(days,"\t",end="")

        days+=1

        count+=1

        if count %7 ==0:

            print("\n")

def main():

    year =int( input("year="))

    if year<1990 or year>9999:

        print("year输入错误")

        main()

    month = int(input("month="))

    if month<1 or month > 12:

        print("month输入错误")

        main()

    sums=calculation(year,month)

    display(sums,year,month)

if __name__=="__main__":

    while True:

        main()

        choose=input("\n是否继续：")

        if choose in("n","N"):

            break