当我尝试运行/example/rllib/green_wave.py时。 我遇到一种情况，程序卡住了。 在终端上的描述是：
Loading configuration... done.
Success.
Starting SUMO on port 40073
Loading configuration... done.
2019-08-01 01:03:19,752 INFO policy_evaluator.py:262 -- Creating policy evaluation worker 0 on CPU (please ignore any CUDA init errors)
2019-08-01 01:03:19.752826: I tensorflow/core/platform/cpu_feature_guard.cc:141] Your CPU supports instructions that this TensorFlow binary was not compiled to use: SSE4.1 SSE4.2 AVX AVX2 FMA
/home/dnl/anaconda3/envs/flow/lib/python3.5/site-packages/tensorflow/python/ops/gradients_impl.py:108: UserWarning: Converting sparse IndexedSlices to a dense Tensor of unknown shape. This may consume a large amount of memory.
"Converting sparse IndexedSlices to a dense Tensor of unknown shape. "
2019-08-01 01:03:20,535 INFO multi_gpu_optimizer.py:74 -- LocalMultiGPUOptimizer devices ['/cpu:0']
我在网站上搜索，sb表示原因是tensorflow的版本旧，所以我将其卸载，并安装了更高的版本。 但是当我再次运行该程序时，它说找不到tensorflow包。 因此，然后我使用[conda update --all]命令，然后再次运行它， 仍然存在相同的情况，如何解决？