heronpy/api/tuple.py

#!/usr/bin/env python3
# -*- encoding: utf-8 -*-

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'''tuple.py: heron's default data type'''

from collections import namedtuple

Tuple = namedtuple('Tuple', 'id component stream task values')
"""Storm's primitive data type passed around via streams.

:ivar id: the ID of the Tuple
:type id: str
:ivar component: component that the Tuple was generated from.
:type component: str
:ivar stream: the stream that the Tuple was emitted into.
:type stream: str
:ivar task: the task the Tuple was generated from.
:type task: int
:ivar values: the payload of the Tuple where data is stored.
:type values: tuple
"""

class TupleHelper:
  """Tuple generator, returns StreamParse compatible tuple"""
  TICK_TUPLE_ID = "__tick"
  TICK_SOURCE_COMPONENT = "__system"