Flower Example using PyTorch#
This introductory example to Flower uses PyTorch, but deep knowledge of PyTorch is not necessarily required to run the example. However, it will help you understand how to adapt Flower to your use case. Running this example in itself is quite easy.
Start by cloning the example project. We prepared a single-line command that you can copy into your shell which will checkout the example for you:
git clone --depth=1 https://github.com/adap/flower.git && mv flower/examples/quickstart-pytorch . && rm -rf flower && cd quickstart-pytorch
This will create a new directory called
quickstart-pytorch containing the following files:
-- pyproject.toml -- requirements.txt -- client.py -- server.py -- README.md
Project dependencies (such as
flwr) are defined in
requirements.txt. We recommend Poetry to install those dependencies and manage your virtual environment (Poetry installation) or pip, but feel free to use a different way of installing dependencies and managing virtual environments if you have other preferences.
poetry install poetry shell
Poetry will install all your dependencies in a newly created virtual environment. To verify that everything works correctly you can run the following command:
poetry run python3 -c "import flwr"
If you don’t see any errors you’re good to go!
Write the command below in your terminal to install the dependencies according to the configuration file requirements.txt.
pip install -r requirements.txt
Run Federated Learning with PyTorch and Flower#
Afterwards you are ready to start the Flower server as well as the clients. You can simply start the server in a terminal as follows:
Now you are ready to start the Flower clients which will participate in the learning. To do so simply open two more terminal windows and run the following commands.
Start client 1 in the first terminal:
Start client 2 in the second terminal:
You will see that PyTorch is starting a federated training. Look at the code for a detailed explanation.