Fixed NumPy deprication warning in efr.py #1271
Merged
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Fixed a NumPy deprecation warning in efr.py when running the regret matching with internal deviations (fix on line 557).
open_spiel/python/algorithms/efr.py:280: DeprecationWarning: Conversion of an array with ndim > 0 to a scalar is deprecated, and will error in future. Ensure you extract a single element from your array before performing this operation. (Deprecated NumPy 1.25.)
I also made a few minor refactoring changes to make the code a little cleaner.