InnerEye-DeepLearning/docs/innereye_as_submodule.md

Using the InnerEye code as a git submodule of your project

You can use InnerEye as a submodule in your own project. If you go down that route, here's the list of files you will need in your project (that's the same as those given in this document)

• environment.yml: Conda environment with python, pip, pytorch
• settings.yml: A file similar to InnerEye\settings.yml containing all your Azure settings
• A folder like ML that contains your additional code, and model configurations.
• A file like myrunner.py that invokes the InnerEye training runner, but that points the code to your environment and Azure settings; see the Building models instructions for details. Please see below for how myrunner.py should look like.

You then need to add the InnerEye code as a git submodule, in folder innereye-deeplearning:

git submodule add https://github.com/microsoft/InnerEye-DeepLearning innereye-deeplearning

Then configure your Python IDE to consume both your repository root and the innereye-deeplearning subfolder as inputs. In Pycharm, you would do that by going to Settings/Project Structure. Mark your repository root as "Source", and innereye-deeplearning as well.

Example commandline runner that uses the InnerEye runner (called myrunner.py above):

import sys
from pathlib import Path


# This file here mimics how the InnerEye code would be used as a git submodule. 

# Ensure that this path correctly points to the root folder of your repository.
repository_root = Path(__file__).absolute()


def add_package_to_sys_path_if_needed() -> None:
    """
    Checks if the Python paths in sys.path already contain the /innereye-deeplearning folder. If not, add it.
    """
    is_package_in_path = False
    innereye_submodule_folder = repository_root / "innereye-deeplearning"
    for path_str in sys.path:
        path = Path(path_str)
        if path == innereye_submodule_folder:
            is_package_in_path = True
            break
    if not is_package_in_path:
        print(f"Adding {innereye_submodule_folder} to sys.path")
        sys.path.append(str(innereye_submodule_folder))


def main() -> None:
    try:
        from InnerEye import ML  # noqa: 411
    except:
        add_package_to_sys_path_if_needed()

    from InnerEye.ML import runner
    print(f"Repository root: {repository_root}")
    # Check here that yaml_config_file correctly points to your settings file
    runner.run(project_root=repository_root,
               yaml_config_file=Path("settings.yml"),
               post_cross_validation_hook=None)


if __name__ == '__main__':
    main()

Adding new models

1. Set up a directory outside of InnerEye to holds your configs. In your repository root, you could have a folder InnerEyeLocal, parallel to the InnerEye submodule, alongside settings.yml and myrunner.py.

The example below creates a new flavour of the Glaucoma model in InnerEye/ML/configs/classification/GlaucomaPublic. All that needs to be done is change the dataset. We will do this by subclassing GlaucomaPublic in a new config stored in InnerEyeLocal/configs

1. Create folder InnerEyeLocal/configs
2. Create a config file InnerEyeLocal/configs/GlaucomaPublicExt.py which extends the GlaucomaPublic class like this:

from InnerEye.ML.configs.classification.GlaucomaPublic import GlaucomaPublic

class MyGlaucomaModel(GlaucomaPublic):
    def __init__(self) -> None:
        super().__init__()
        self.azure_dataset_id="name_of_your_dataset_on_azure"

1. In settings.yml, set model_configs_namespace to InnerEyeLocal.configs so this config
   is found by the runner. Set extra_code_directory to InnerEyeLocal.

Start Training

Run the following to start a job on AzureML:

python myrunner.py --azureml --model=MyGlaucomaModel

See Model Training for details on training outputs, resuming training, testing models and model ensembles.