"""Countdown, by Al Sweigart al@inventwithpython.com
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.
This code is available at https://nostarch.com/big-book-small-python-programming
Tags: tiny, artistic"""
import sys, time
import sevseg # Imports our sevseg.py program.
# (!) Change this to any number of seconds:
secondsLeft = 30
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 minute, 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 Al Sweigart al@inventwithpython.com')
sys.exit() # When Ctrl-C is pressed, end the program.)