class_docstr: A context object timer. Usage:
      >>> with Timer() as timer:
      ...     do_something()
      >>> print(timer.interval)
code: def __exit__(self, *exc):
      self.finish = self.time()
      self.interval = self.finish - self.start
  
imports: import time
label_desc: Use image node_id 3 for calling the Timer obj's underlying member method code with example usage: obj.__exit__() without return types