def __init__(self, data_type=None):
    """Initializes an event data attribute container.

    Args:
      data_type (Optional[str]): event data type indicator.
    """
    super(EventData, self).__init__()
    self.data_type = data_type
    self.offset = None
    self.query = None
def __init__ ( self , data_type = None ) : super ( EventData , self ) . __init__ ( ) self . data_type = data_type self . offset = None self . query = None
Initializes an event data attribute container.

    Args:
      data_type (Optional[str]): event data type indicator.