A neat stopwatch for Python.
>>> stopwatch = Stopwatch()
>>> stopwatch.start()
>>> time.sleep(1)
>>> stopwatch.time_elapsed
1.1520211696624756
>>> time.sleep(1)
>>> stopwatch.stop()
>>> stopwatch.total_run_time
2.055678129196167
>>> with Stopwatch() as stopwatch:
... time.sleep(1)
... print stopwatch.time_elapsed
... time.sleep(1)
1.1520211696624756
>>> stopwatch.total_run_time
2.055678129196167