pomdp-py now has a nice debugging tool to debug the search tree. A quick glimpse below. To print the search tree up to depth 1:
Refer to [the documentation](https://h2r.github.io/pomdp-py/html/api/pomdp_py.utils.debugging.html#treedebugger) for more usage.
Please refer to [the changelog](https://h2r.github.io/pomdp-py/html/changelog.html#version-1-3-0-1-09-30-2021) for a complete list of important upgrades (backwards-compatible).