# [Posteriors for Bayesian Index policies:](https://smpybandits.github.io/docs/Policies.Posterior.html) > See here the documentation: [docs/Policies.Posterior](https://smpybandits.github.io/docs/Policies.Posterior.html) - [`Beta`](Beta.py) is the default for [`Thompson`](Thompson.py) Sampling and [`BayesUCB`](BayesUCB.py), ideal for Bernoulli experiments, - [`Gamma`](Gamma.py) and [`Gauss`](Gauss.py) are more suited for respectively Poisson and Gaussian arms.