pygambit.gambit.MixedStrategyProfile.regret

MixedStrategyProfile.regret(strategy: Strategy | str)

Returns the regret to playing strategy, if all other players play according to the profile.

The regret is defined as the difference between the payoff of the best-response strategy and the payoff of strategy. By convention, the regret is always non-negative.

Parameters:

strategy (Strategy or str) – The strategy to get the regret for. If a string is passed, the strategy is determined by finding the strategy with that label, if any.

Raises:

• MismatchError – If strategy is a Strategy from a different game.

• KeyError – If strategy is a string and no strategy in the game has that label.