Only Python !!!!

7.8 (Stopwatch) Design a class named Stopwatch. The class contains: The private data fields startTime and endTime with get methods. A constructor that initializes startTime with the current time. " A method named start() that resets the startTime to the current time. A method named stop () that sets the endTime to the current time. A method named get ElapsedTime() that retums the elapsed time for the stop watch in milliseconds. Draw the UML diagram for the class, and then implement the class. Write a test program that measures the execution time of adding numbers from 1 to 1,000,000