CODE:

from timeit import default_timer

class Timer(object):
def __init__(self, verbose=False):
      self.verbose = verbose
      self.timer = default_timer

def __enter__(self):
      self.start = self.timer()
      return self

def __exit__(self, *args):
      end = self.timer()
      self.elapsed_secs = end - self.start
      self.elapsed = self.elapsed_secs * 1000  # millisecs
      if self.verbose:
         print 'elapsed time: %f ms' % self.elapsedTo use the Timer (context manager object), invoke it using Python's `with` statement. The duration of the context (code inside your `with` block) will be timed. It uses the appropriate timer for your platform, via the `timeit` module.

ITPub博客

Python Timer Class - Context Manager for Timing Code Blocks

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