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PyTorch template

In this project, we provide a strong template for a PyTorch project. The purpose of this repository is to provide an example (and strong utils on the way) for a deep learning project using PyTorch.

TensorBoard

To run tensorboard simply run in the project directory tensorboard --logdir logs/tensorboard

Structure

Configuration

We use the Hydra framework for configuration. It allows us to easily read configuration files and to do hyper-parameter tuning.

The configuration file is stored under config/config.yaml and has many parameters. At the beginning of each experiment, the configuration file is validated with a schema. The schema is stored at utils/config_schema.py.

In case we want to add/remove a parameter from the configuration file we need to:

• Change the YAML file
• Change the schema at utils/config_schema.py
• Verify that we don't break anything in TrainParams

To run hyperparameter tuning just follow the instructions here.

Models

The model package should store all the models we use. You can take a look at models/base_model.py in MyModel for example.

Networks

The networks package should hold layers such as modified sequential. For example, in the nets package, you can see FCNet which is an easy implementation for a fully connected network with weight normalization, dropout and easy way to add hidden layers with different values of hidden neurons.

Train

The train function gathers all the training logic. Its structure is built for an easy change. For example, you can change the optimizer and more.

Moreover, during the training and evaluation stage, the logger reports relevant metrics to stdout, file, and TensorBoard.

Dataset

New dataset creation built from three stages:

1. Set variables - set the relevant inputs to self.
2. Load features - pick the best way to load features (memory/disk) and implement the load stage under self._get_features()
3. Create a list of entries - implement self._get_entries()

Then, in __getitem__ you only need to retrieve samples from the list you created in stage #3.

Logger

The logger class is logging messages to:

1. Tensorboard
2. Stdout
3. Files

Each experiment has a directory under logs/ (configurable). By default, the best epoch and all the output will be saved there.

Types

In case you add/change a type you can add it to utils/types.py

Checklists

Checklist for a new dataset

To add a new dataset:

• Add relevant variables to the constructor
• Implement self._get_features
• Implement self._get_entries
• Implement self.__getitem__

Checklist for a change in configuration

To change a variable in the configuration file:

• Change it in the config.yaml file
• Update the schema under utils/config_schema.py
• Update TrainParams in utils/train_utils.py

Credits

• Hydra for a great configuration framework.
• bottom-up-attention-vqa for great modified layers.