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# Meson and `distutils` ways of doing things

Old workflows (numpy.distutils based):

The runtests.py file was removed in commit 0f73f92255253ec5dff2de5ca45d8d3bdda03f92 [^1^_].

1. `python runtests.py`

2. `python setup.py build_ext -i` + `export PYTHONPATH=/home/username/path/to/scipy/reporoot` (and then edit pure Python code in SciPy and run it with `python some_script.py`).

3. `python setup.py develop` - this is similar to (2), except in-place build is made permanently visible in env.

4. `python setup.py bdist_wheel` + `pip install dist/scipy*.whl` - build wheel in current env (i.e. uses installed numpy, etc.) and install it.

5. `pip install .` - build wheel in an isolated build env against deps in `pyproject.toml` and install it. Note: be careful, this is usually not the correct command for development installs - typically you want to use (4) or `pip install . -v --no-build-isolation`.

New workflows (Meson and meson-python based):

1. `python dev.py`

2. `pip install -e . --no-build-isolation` (see the `meson-python` docs)

3. the same as (2)

4. `python -m build --no-isolation` + `pip install dist/scipy*.whl` - see pypa/build.

5. `pip install .`

[^1^_]: [Commit 0f73f92255253ec5dff2de5ca45d8d3bdda03f92 on GitHub](scipy/scipy).