decorators.py

import functools
import time
def debug(func):
  @functools.wraps(func)
  def f(self, *args, **kwargs):
      start = time.now()
      _return = func(self, *args, **kwargs)
      diff = time.now() - start
      print '%s (%.2fms)' % (func, diff)
      return _return
  return f