<p style="line-height: normal;">#！ python3
# stopwatch.py - A simple stopwatch program.
import time
# Display the program's instructions.
print('Press ENTER to begin. Afterwards, press ENTER to "click" the stopwatch. \
Press Ctrl-C to quit.')
input() # press Enter to begin
print('Started.')
startTime = time.time() # get the first lap's start time
lastTime = startTime
lapNum = 1
# Start tracking the lap times.
try:
while True:
input()
lapTime = round(time.time() - lastTime, 2)
totalTime = round(time.time() - startTime, 2)
print('Lap #%s: %s (%s)' % (lapNum, totalTime, lapTime), end='')
lapNum += 1
lastTime = time.time() # reset the last lap time
except KeyboardInterrupt:
# Handle the Ctrl-C exception to keep its error message from displaying.
print('\nDone.')<br></p>
