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+#! python3
+#! /usr/bin/env python3
+
+# Chapter 15 Practice Prettified Stopwatch
+# Simple Stop Watch Program
+
+# NOTE: Writing output to data text file rather than use pyperclip module.
+#       Then file can be attached to email or copied as needed. And a
+#       separate module outside the standard library is not required.
+
+import time
+import datetime
+
+dataFile = open('stopWatchData.txt', 'a')
+
+dt = datetime.datetime.now()
+timeStamp = dt.strftime('\n%m/%d/%Y %H:%M\n')
+dataFile.write(timeStamp)
+
+print('Press ENTER to begin. Afterwards, press ENTER to click the stopwatch.')
+print('Press CTRL-C to quit.')
+input()
+print('Started...')
+startTime = time.time()
+lastTime = startTime
+lapNum = 1
+
+try:
+    while True:
+        input()
+        lapTime = round(time.time() - lastTime, 2)
+        totalTime  = round(time.time() - startTime, 2)
+        print('Lap #%s: %s (%s)' % (str(lapNum).ljust(2), str(totalTime).rjust(4), str(lapTime).rjust(5)), end='')
+        dataFile.write('Lap #%s: %s (%s)\n' % (str(lapNum).ljust(2), str(totalTime).rjust(4), str(lapTime).rjust(5)))
+        lapNum += 1
+        lastTime = time.time()
+except KeyboardInterrupt:
+    print('\nDone.')
+
+dataFile.close()