python3-pyrsistent – persistent/functional/immutable data structures for Python

Pyrsistent is a number of persistent collections (sometimes 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.

The collection types and key features currently implemented are:

  • PVector, similar to a python list

  • PMap, similar to dict

  • PSet, similar to set

  • PRecord, a PMap on steroids with fixed fields, optional type and invariant checking and much more

  • PClass, a Python class fixed fields, optional type and invariant checking and much more

  • Checked collections, PVector, PMap and PSet with optional type and invariance checks and more

  • PBag, similar to collections.Counter

  • PList, a classic singly linked list

  • PDeque, similar to collections.deque

  • Immutable object type (immutable) built on the named tuple

  • freeze and thaw functions to convert between pythons standard collections and pyrsistent collections.

  • Flexible transformations of arbitrarily complex structures built from PMaps and PVectors.

Package availability chart

Distribution

Base version

Our version

Architectures

Debian GNU/Linux 10.0 (buster)

0.15.5-1~nd1~nd100+1

i386, amd64, ppc64el

Debian GNU/Linux 11.0 (bullseye)

0.15.5-1

0.15.5-1~nd1~nd110+1

i386, amd64

Debian GNU/Linux 12.0 (bookworm)

0.18.1-1

Debian testing (trixie)

0.20.0-2

Debian unstable (sid)

0.20.0-2

0.15.5-1~nd1~nd+1

i386, amd64

Ubuntu 18.04 “Bionic Beaver” (bionic)

0.15.5-1~nd1~nd18.04+1

i386, amd64

Ubuntu 20.04 “Focal Fossa” (focal)

0.15.5-1build1

Ubuntu 22.04 “Jammy Jellyfish” (jammy)

0.18.1-1build1

Ubuntu 24.04 “Noble Numbat” (noble)

0.20.0-1build2

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