perpetual.py

Created by tlake
Created on July 21, 2024
2.34 KB
Shows a perpetual calendar
from math import *

# print out table showing monthly calendar
def put_month( month, year ):
    # compute julian day for year and month
    days = 0
    if (month <= 2): 
        days = -1

    jd = 367*year \
        - floor(7*(year + floor((month + 9)/12))/4) \
        + floor(275*month/9) \
        - floor(3*(floor((year + days)/100) + 1)/4) \
        + 1721031

    # get days in this month
    if month in(4,6,9,11):
        days = 30                      # Apr, Jun, Sep, Nov
    elif month == 2:
        days = 28                      # Feb normal
        if year % 4 == 0:
            if not((year % 100 == 0) and \
                   (year % 400 != 0)):
                days = 29              # Feb leap year
    else:
        days = 31                      # other months

    # init with blanks
    for i in range(1,43):
        C[i] = "   "

    # day of week of first day of month
    beg = jd - 7*floor(jd/7)
    for i in range(1,days+1):
        C[i+beg] = '{:3d}'.format(i)

    # display month and year
    print("            ",end='')
    if month == 1:
        print("Jan",end='')
    elif month == 2:
        print("Feb",end='')
    elif month ==  3:
        print("Mar",end='')
    elif month == 4:
        print("Apr",end='')
    elif month == 5:
        print("May",end='')
    elif month == 6:
        print("Jun",end='')
    elif month == 7:
        print("Jul",end='')
    elif month == 8:
        print("Aug",end='')
    elif month == 9:
        print("Sep",end='')
    elif month == 10:
        print("Oct",end='')
    elif month == 11:
        print("Nov",end='')
    elif month == 12:
        print("Dec",end='')
    print('',year)

    # display days
    print("   S   M   T   W   T   F   S")
    print('',C[1],  C[2],  C[3],  C[4],  C[5],  C[6],  C[7])
    print('',C[8],  C[9],  C[10], C[11], C[12], C[13], C[14])
    print('',C[15], C[16], C[17], C[18], C[19], C[20], C[21])
    print('',C[22], C[23], C[24], C[25], C[26], C[27], C[28])
    print('',C[29], C[30], C[31], C[32], C[33], C[34], C[35])
    print('',C[36], C[37], C[38], C[39], C[40], C[41], C[42])

# ask user to continue or not
def another():

    ans = input("another [Y|N]? ")
    return (ans[0] == 'Y') or (ans[0] == 'y')

C = ['' for i in range(0,43)]

while True:
    mm,yy = map(int,input("\nmonth, year? ").split())
    put_month( mm, yy )
    if not another():
        break