#!/usr/bin/env python
# -*- coding: utf-8 -*-

import time

class timeit():

  def __init__(self, label):
    import sys
    import time
    self.__time = time.time
    self.__label = label

  def __call__(self, f, *args, **kwargs):
    self.__enter__()
    result = f(*args, **kwargs)
    self.__exit__()
    return result

  def __enter__(self):
    self.ts = self.__time()

  def __exit__(self, *args):
    te = self.__time()
    print('%s %2.2f ms' % (self.__label, (te - self.ts) * 1e3))

if __name__ == "__main__":

  @timeit('function_label')
  def func():
    time.sleep(0.5)

  for x in range(10):
    with timeit('anonymous_block_{0}'.format(x)):
      time.sleep(0.1)

  with timeit('anonymous_block_noop'):
    pass