added working stopwatch

stopwatch.py

@@ -0,0 +1,30 @@
+#!/bin/env python3
+from time import localtime, sleep, struct_time, time
+import datetime
+import sys
+
+
+class stopwatch:
+    def __init__(self) -> None:
+        self.start_time = datetime.datetime.now().replace(microsecond=0)
+
+    def display(self) -> None:
+        print("started at:\t%s" % self.start_time)
+        while True:
+            now = datetime.datetime.now().replace(microsecond=0)
+            elapsed = (now - self.start_time)
+            text0 = ("\rcurrent:\t%s" % now)
+            text1 = ("elapsed:\t%s" % elapsed)
+            sys.stdout.write('\r' + str(text0+"\t\t"+text1) + "\t" * 3)
+            sys.stdout.flush()
+            sleep(1)                        
+
+def main():
+    try:
+        timer = stopwatch()
+        timer.display()
+    except KeyboardInterrupt:
+        pass
+
+if __name__ == "__main__":
+    main()