AttributeError: 'MCTS' object has no attribute 'get_next_actions_batch' [bug]

[weisili2016]

1）指令如下：
python3 -u zoo/board_games/gomoku/config/gomoku_alphazero_bot_mode_config.py
2）
默认的mcts_ctree = False 的情况下，MCTS中 “get_next_actions_batch” 未定义

[esparano]

I am getting the same issue running connect4_alphazero_sp_mode_config.py

[puyuan1996]

Thanks for your report. The Connect4 failure has the same root cause as the original Gomoku issue: when mcts_ctree=False, AlphaZeroPolicy calls get_next_actions_batch, but the Python AlphaZero MCTS implementation (ptree_az.MCTS) only had the single-env get_next_action API.

The PR adds a compatible get_next_actions_batch wrapper to the Python AlphaZero MCTS, and also covers the Python Sampled AlphaZero MCTS. The wrapper keeps the same public interface as the C++ MCTS path while reusing the existing single-env get_next_action logic internally.

I verified both paths:

• A minimal smoke test for connect4_alphazero_sp_mode_config.py passes without the get_next_actions_batch AttributeError.
• A minimal smoke test for the original gomoku_alphazero_bot_mode_config.py also passes.

So the current PR should fix this issue for both Gomoku and Connect4 when mcts_ctree=False.