code: def add_stderr_logger(level=logging.DEBUG):
      
      # This method needs to be in this __init__.py to get the __name__ correct
      # even if urllib3 is vendored within another package.
      logger = logging.getLogger(__name__)
      handler = logging.StreamHandler()
      handler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s %(message)s'))
      logger.addHandler(handler)
      logger.setLevel(level)
      logger.debug('Added a stderr logging handler to logger: %s' % __name__)
      return handler
docs: Helper for quickly adding a StreamHandler to the logger. Useful for
      debugging.
  
      Returns the handler after adding it.