old_contents: from functools import wraps
  from time import time
  
  
  def measure_time(name=None):
      def decorator(func):
          called = name if name else func.__name__
  
          @wraps(func)
          def func_wrapper(*args, **kwargs):
              t0 = time()
              result = func(*args, **kwargs)
              t = time() - t0
              print called, t
              return result
          return func_wrapper
      return decorator
  
  
  class Stopwatch(object):
      def __init__(self, inside_mg='Default watch,'):
          self.start_time = time()
          self.inside_mg = inside_mg
  
      def print_time(self, msg):
          print self.inside_mg, 'Time: ', msg, ':   ', time() - self.start_time
          self.start_time = time()
  
new_contents: from functools import wraps
  from time import time
  
  
  def measure_time(name=None):
      def decorator(func):
          called = name if name else func.__name__
  
          @wraps(func)
          def func_wrapper(*args, **kwargs):
              t0 = time()
              result = func(*args, **kwargs)
              t = time() - t0
              print(called, t)
              return result
          return func_wrapper
      return decorator
  
  
  class Stopwatch(object):
      def __init__(self, inside_mg='Default watch,'):
          self.start_time = time()
          self.inside_mg = inside_mg
  
      def print_time(self, msg):
          print(self.inside_mg, 'Time: ', msg, ':   ', time() - self.start_time)
          self.start_time = time()
  
subject: print statements for py3 compatibility