Missing module error in Federated Learning with NVFlare tutorial

[sorensenmarius]

I have followed each step of the federated learning with NVFlare without Docker tutorial, and have run into a problem when I want to start the server and the clients. When I do the "Run federated learning" step in the README I am getting this error from sub_start.sh:
/tutorials/federated_learning/nvflare/nvflare_example/nvflare_monai/bin/python3: No module named nvflare.private.fed.app.client.client_train
and
/tutorials/federated_learning/nvflare/nvflare_example/nvflare_monai/bin/python3: No module named nvflare.private.fed.app.server.server_train

I have tried redoing the whole installation and manually installing nvflare with both pip and pip3, however these tell me that all requirements are satisfied.

Has anyone run into this problem? I would love some input on how to move forward with this.

[wyli]

Thanks for reporting, I created an issue for this #377

[yiheng-wang-nv]

Hi @sorensenmarius , could I ask which python version did you used?

[sorensenmarius]

Seems to be 3.6.9

[yiheng-wang-nv]

Thanks, if possible, could you please try with python 3.8 and check if it works?

[yiheng-wang-nv]

Hi @sorensenmarius , I've checked with the released nvflare==1.0.2, and the built pyc files was from python 3.8.10, thus this python version should be used. Thanks for reporting this issue, and later I will submit a PR to modify the readme.

[sorensenmarius]

I tried this with Python 3.8.10 and I am still getting the same problem.

[holgerroth]

Have you tried using a virtual environment for this? See instructions here.

[TaocsZhang]

I have tried python 3.8.10, nvflare==1.0.2 and monai==0.7.0. I use conda to create the virtual environment.
Any idea to solve this?

I have the same issue: /tutorials/federated_learning/nvflare/nvflare_example/nvflare_monai/bin/python3: No module named nvflare.private.fed.app.client.client_train
and
/tutorials/federated_learning/nvflare/nvflare_example/nvflare_monai/bin/python3: No module named nvflare.private.fed.app.server.server_train

[yiheng-wang-nv]

Hi @TaocsZhang , can you try to follow the instructions in readme and check if it works?