Python Project Calendar Maker

Overview

This program generates printable text files of monthly calendars for the month and year your enter. Dates and calendars are a tricky topic in programming because there are so many different rules for determining the number of days in a month, which years are leap years, and whcih day of the week a particular date falls on. Fortunately , Python's datetime moudle handles these details for you. This program focuses on generating the multiline string for the monthly calendarr page.

The Program in Action

How It Works

""" Countdown , by Maxwell Pan 
Show a countdown timer animation using a seven-segment display.
Press Ctrl-C to stop.
More info at https://en.wikipedia.org/wiki/Seven-segment_display
Requires sevseg.py to be in the same folder.
View this code at https://nostarch.com/big-book-small-python-projects
Tags: tiny, artistic"""

import sys, time
import sevseg # Import our sevseg.py program.

# (!) Change this to any number of seconds:
secondsLeft = 1500

try:
    while True: #Main program loop.
        # Clear the screen by printing several newlines:
        print('\n' * 60)


        # Get the hours/minutes/seconds from secondsleft:
        # For example: 7265 is 2 hours, 1 minutes, 5 seconds.
        # So 7265 // 3600 is 2 hours:
        hours = str(secondsLeft // 3600)
        # And 7265 % 3600 is 65 , and 65 // 60 is 1 minute:
        minutes = str((secondsLeft % 3600) // 60)
        # And 7265 % 60 is 5 seconds:
        seconds = str(secondsLeft % 60)

        # Get the digit strings from the sevseg module:
        hDigits = sevseg.getSevSegStr(hours, 2)
        hTopRow, hMiddleRow, hBottomRow = hDigits.splitlines()

        mDigits = sevseg.getSevSegStr(minutes, 2)
        mTopRow, mMiddleRow, mBottomRow = mDigits.splitlines()

        sDigits = sevseg.getSevSegStr(seconds, 2)
        sTopRow, sMiddleRow, sBottomRow = sDigits.splitlines()

        # Display the digits:
        print(hTopRow    + '        ' + mTopRow +    '      ' + sTopRow)
        print(hMiddleRow + '    *   ' + mMiddleRow + '   *  ' + sMiddleRow)
        print(hBottomRow + '    *   ' + mBottomRow + '   *  ' + sBottomRow)

        if secondsLeft == 0:
            print()
            print('     * * * *  BOOM * * * *')
            break

        print()
        print('Press Ctrl-C to quit.')

        time.sleep(1) # Insert a one-second pause.
        secondsLeft -= 1
except KeyboardInterrupt:
    print('Countdown, by Maxwell')
    sys.exit() # When Ctrl-C is pressed, end the program.