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+# Instructions for development
+
+## Dependency management and dev environment
+Poetry is used as a backend for packaging and for dependency
+management. To set up a working development environment, create
+a virtual environment and install the `poetry` python package.
+Then install all develpoment dependencies:
+
+```bash
+python@3.11 -m venv <name_of_venv>
+source <name_of_venv>/bin/activate
+pip install poetry
+poetry install
+```
+
+## Testing
+The tests are maintained in the subpackages under `tests`, e.g.
+`menu_tools/object_performance/tests`. After properly setting up
+a development environment as described [above](#dependency-management-and-dev-environment)
+you can simply run
+
+```bash
+pytest -vv
+```
+
+to run all tests. The `-vv` option is optional and can be omitted.
+For some of the tests the presence of the V29 caching files is required.
+
+
+## Code Formatting and Linting
+`black` is used for code formatting and `flake8` for linting.
+These tools are helpful to have consistent formatting through
+the codebase even with multiple developers working on the code.
+To run `black`, set up the development environment as described
+[above](#dependency-management-and-dev-environment) and run
+
+```bash
+black menu_tools
+```
+
+If you want to dry-run, add the `--check` flag to see which files would
+be modified.
+Similarlly `flake8` can be run by simply typing
+
+```bash
+flake8 menu_tools
+```