pyrsistent-as-rpds-py 1.1.0

Adapter which implements a subset of rpds-py using pyrsistent. Mostly meant for PyPy.

pyrsistent-as-rpds-py

what is this?

This is a thin adapter library which implements a subset of rpds-py using pyrsistent. The provided functionality is sufficient to run the jsonschema test cases successfully.

why is this?

In 2023, the jsonschema devs replaced the pure-Python pyrsistent library dependency with a binary dependency called rpds-py. This replacement was done for very reasonable speed reasons. However, PyPy users may still prefer the pure-Python version both for speed reasons and also to avoid the hassle of building binary packages.

(The rpds-py API also just feels better than the pyrsistent one, in my humble opinion. If I wanted to build something with persistent data structures, I would probably either use this module or rpds-py.)

how to use

Pip doesn't seem to have a way to override or substitute dependencies (at least without disabling dependency resolution entirely). Therefore, I suggest running something like this:

pip install --no-index --no-build-isolation .  # install package "pyrsistent-as-rpds-py"
cd extra/fake_rpds
pip install --no-index --no-build-isolation .  # install fake and empty "rpds" package to make pip happy

Now you can install jsonschema or other packages that depend on rpds-py normally.