Run a PyPI server from the past
Do you wish you could just install packages with pip as if you were at some fixed date in the past? If so, the PyPI time machine is for you!
pip install pypi-timemachine
Once installed, you can run a PyPI server with:
or if you need to specify a precise time (in UTC):
This will start up a Flask app, and will print out a line such as:
Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
You can then call pip with:
pip install --index-url http://127.0.0.1:5000/ astropy
and this will then install the requested packages and all dependencies, ignoring any releases after the cutoff date specified above.
If a package is already installed, pip will not try installing it again. This means that if e.g. you try and run pip as described above, but the package you are trying to install (or any of its dependencies) is already installed, no matter how recent the version, it will not be installed again. Therefore, I recommend using pip with the custom index URL inside a clean environment (but you can run the pypi-timemachine command inside your regular environment.)
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