pygambit.gambit.Game.get_minimal_subgame#

Game.get_minimal_subgame(history: Selector) → History#

Returns the History of the root of the smallest subgame containing the information set or event that the node identified by history belongs to.

history is a Selector (an H-built expression, evaluated against this game) that must resolve to exactly one node.

Added in version 16.7.0.

Changed in version 17.0.0: Renamed from minimal_subgame. history (formerly infoset) is now a Selector; a Node or str is no longer accepted directly – build one with H. Returns the History of the subgame’s root, instead of a Subgame object.

Parameters:

history (Selector) – A Selector resolving to a single node belonging to the information set or event to query.

Returns:

The History of the root of the smallest subgame containing the information set or event that history belongs to.

Return type:

History

Raises:

  • TypeError – If history is not a Selector.

  • UndefinedOperationError – If the game does not have a tree representation.

  • ValueError – If history does not resolve to exactly one node, or belongs to no information set or event (it is terminal).