Bo Zhou

> my env is ubuntu 18.04, parl 1.4.3, paddlepaddle 1.8.5, after I remove pyarrow, it happen to this error: Exception: "pyarrow" is provided in "master"'s enviroment, however, it is not...

Cloud you provide the log of following commands ? ```shell which xparl which pip ```

Thanks a lot. I'm afraid that a different python is used to launch the master node. Please provide the log of the following command: ```python import sys print(sys.executable) ```

It seems that you can run distributed computation with `xparl`. Can you try run the A2C example again? It should work as expected now.

Thanks for your kind and patient reply. I have discussed with @zenghsh3 and we guessed it might result from incorrect environment configuration. May I add your wechat account for further...

有的，请参考PARL仓库里的[DQN示例](https://github.com/PaddlePaddle/PARL/tree/r1.2/examples/LiftSim_baseline)。

hello，感谢您的反馈：） 可以发一个PR 修复这个问题 https://github.com/PaddlePaddle/RLSchool/blob/aa50b7fd78b93c597f73c5cb1f6161a4e4fb7ba4/setup.py#L46

这个建议找Unitree官方提供。

try this: `pip install --upgrade git+https://github.com/baidu/Familia.git`

这部分数据是我们跑真机收集到的数据，用于解决sim2real的问题。