docs: def load(*,
           aws_access_key_id=None,
           aws_secret_access_key=None,
           s3_bucket=AWS_S3_DEFAULT_BUCKET_NAME,
           dry_run=False,
           **kwargs):
      """
      Load this driver
  
      Note that if either aws_access_key_id or aws_secret_access_key are
      not specified, they will not be taken into account and instead
      authentication towards AWS will solely rely on boto config
  
      :param aws_access_key_id(str, optional): Access key ID
      :param aws_secret_access_key(str, optional): Secret access key
      :param s3_bucket(str, optional): Name of the S3 bucket to be used to store the file
      :param dry_run(bool, optional): Whether to activate dry run mode on this driver
      :param \*\*kwargs: arbitrary keyword arguments
      """
      global _dry_run, _has_init
      global _aws_access_key_id, _aws_secret_access_key, _bucket_name, _boto_conn
  
      # dry run
      _dry_run = dry_run
  
      # AWS parameters from kwargs
      _aws_access_key_id = aws_access_key_id
      _aws_secret_access_key = aws_secret_access_key
      if _aws_access_key_id is not None and type(_aws_access_key_id) != str:
          raise TypeError('aws_access_key_id must be str')
      if _aws_secret_access_key is not None \
         and type(_aws_secret_access_key) != str:
          raise TypeError('aws_secret_access_key must be str')
  
      # Check the bucket name before doing anything
      _bucket_name = s3_bucket
      if type(_bucket_name) != str:
          raise TypeError('s3_bucket must be str')
      if not _bucket_name:
          raise ValueError("s3_bucket cannot be empty")
  
      # Connect to S3 service
      log.msg("Connecting to Amazon S3 Service")
      if not _aws_access_key_id or not _aws_secret_access_key:
          log.msg_warn("No AWS credentials were given. " +
                       "Authentication will be done via boto.config/IAM role")
          if not _dry_run:
              _boto_conn = boto.connect_s3()
      elif not _dry_run:
          _boto_conn = boto.connect_s3(aws_access_key_id=_aws_access_key_id,
                                       aws_secret_access_key=_aws_secret_access_key)
      log.msg("Connected to AWS S3 service successfully!")
  
      # Indicate this driver has been properly initialised
      _has_init = True