# from __future__ import absolute_import
# from __future__ import division
# from __future__ import print_function
# from __future__ import unicode_literals

import time


class Timer(object):
  """A simple timer."""

  def __init__(self):
    self.reset()

  def tic(self):
    # using time.time instead of time.clock because time time.clock
    # does not normalize for multithreading
    self.start_time = time.time()

  def toc(self, average=True):
    self.diff = time.time() - self.start_time
    self.total_time += self.diff
    self.calls += 1
    self.average_time = self.total_time / self.calls
    if average:
      return self.average_time
    else:
      return self.diff

  def reset(self):
    self.total_time = 0.
    self.calls = 0
    self.start_time = 0.
    self.diff = 0.
    self.average_time = 0.
