Persistent/Functional/Immutable data structures
Pyrsistent is a number of persistent collections (by some referred to as functional data structures). Persistent in the sense that they are immutable. All methods on a data structure that would normally mutate it instead return a new copy of the structure containing the requested updates. The original structure is left untouched.
You can contact the maintainers of this package via email at
python-pyrsistent dash maintainers at fedoraproject dot org.