Transform-Invariant Non-Negative Matrix Factorization
A comprehensive Python package for Non-Negative Matrix Factorization (NMF) with a focus on learning transform-invariant representations.
The packages supports multiple optimization backends and can be easily extended to handle application-specific types of transforms.
General Introduction
A general introduction to Non-Negative Matrix Factorization and the purpose of this package can be found on the corresponding GitHub Pages.
Installation
For using this package, you will need Python version 3.7 (or higher).
The package is available via PyPI.
Installation is easiest using pip:
pip install tnmf
Demos and Examples
The package comes with a streamlit demo and a number of examples that demonstrate the capabilities of the TNMF model.
They provide a good starting point for your own experiments.
Online Demo
Without requiring any installation, the demo is accessible via streamlit sharing.
Local Execution
Once the package is installed, the demo and the examples can be conveniently executed locally using the tnmf command:
- To execute the demo, run
tnmf demo. - A specific example can be executed by calling
tnmf example <example_name>.
To show the list of available examples, type tnmf example --help.
License
Copyright (c) 2021 Merck KGaA, Darmstadt, Germany
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
The full text of the license can be found in the file LICENSE in the repository root directory.
Working with the Code
To checkout the code and set up a working environment with all required Python packages, execute the following commands:
git checkout https://github.com/emdgroup/tnmf.git ./tnmf
cd tmnf
python3 -m virtualenv .venv
source .venv/bin/activate
pip install --upgrade pip
pip install -r requirements.txt
Now, you should be able to execute the unit tests by calling pytest to verify that the code is running as expected.
Pull Requests
Before creating a pull request, you should always try to ensure that the automated code quality and unit tests do not fail.
This section explains how to run them locally to understand and fix potential issues.
Code Style and Quality
Code style and quality are checked using flake8 and pylint.
To execute them, change into the repository root directory, run the following commands and inspect their output:
flake8
pylint tnmf
In order for a pull request to be accaptable, no errors may be reported here.
Unit Tests
Automated unit tests reside inside the folder tnmf/tests. They can be executed via
pytest by changing into the repository root directory and running
pytest
Debugging potential failures from the command line might be cumbersome.
Most Python IDEs, however, also support pytest natively in their debugger.
Again, for a pull request to be acceptable, no failures may be reported here.
Code Coverage
Code coverage in the unit tests is measured using coverage.
A coverage report can be created locally from the repository root directory via
coverage run
coverage report
This will output a concise table with an overview of python files that are not fully covered with unit tests along with the line numbers of code that has not been executed.
A more detailed, interactive report can be created using
coverage html
Then, you can open the file htmlcov/index.html in a web browser of your choice to navigate through code annotated with coverage data.
Required overall coverage to is configured in setup.cfg, under the key fail_under in section [coverage:report].
Building the Documentation
To build the documentation locally, change into the doc subdirectory and run make html.
Then, the documentation resides at doc\_build\html\index.html.
