search.search_mcts module

class search.search_mcts.MCTS(settings)

Bases: circa.stages.search.search.Search

class CFG

Bases: object

SCALER = {'mandatory': True, 'parameter': 'Scaler'}

BUDGET = {'mandatory': True, 'parameter': 'Budget'}

__init__(settings)

Extends __init__ of Search.

Raises:RuntimeError – If a configuration option is missing or its value cannot be parsed or is not supported.

setup(gen_info, root_node)

Sets up the Search instance using a GeneralInformation instance. Provides a default implementation.

Parameters:

• gen_info (GeneralInformation) – The framework’s GeneralInformation instance.
• root_node (Node) – A Node instance which is the search space tree’s root.

hasTerminated()

Returns whether the search is finished or not.

utcSelect(list_of_nodes)

hasOpenList(node)

hasCloseList(node)

hasActiveChildren(node)

getMaxRewardChildren(node)

popNextNode()

Returns the Node that is to be validated next. Can return None if no more nodes exist.

Returns:

The next Node to be validated or None if no such

Node exists.

Return type:Node

expandSearchSpace()

Expands the search space tree and returns a list of all new Nodes to be approximated.

Returns:

A list containing all Nodes that need to

be approximated.

Return type:list of Node

backPropagate(node, value)

evaluateNodes()

Uses search-specific heuristics and circuit stats to evaluate nodes for popNextNode.