util.py 文件源码

def close_all(resources):
  """Safely closes multiple resources.

  The close method on all resources is guaranteed to be called. If
  multiple close methods throw exceptions, then the first will be
  raised and the rest will be logged.

  Args:
    resources: An iterable of object instances whose classes implement
        the close method.

  Raises:
    Exception: To rethrow the last exception raised by a close method.
  """
  exc_info = None
  for resource in resources:
    try:
      resource.close()
    except Exception as e:  # pylint: disable=broad-except
      if exc_info is not None:
        tf.logging.error('Suppressing close(%s) failure: %s', resource, e,
                         exc_info=exc_info)
      exc_info = sys.exc_info()
  if exc_info is not None:
    six.reraise(*exc_info)