Bug#941092: ITP: python-pyrsistent -- Persistent/Functional/Immutable data structures

[Thomas Goirand <zigo@debian.org>]

Package: wnpp
Severity: wishlist
Owner: Thomas Goirand <zigo@debian.org>

* Package name    : python-pyrsistent
  Version         : 0.15.4
  Upstream Author : Tobias Gustafsson <tobias.l.gustafsson@gmail.com>
* URL             : https://github.com/tobgu/pyrsistent/
* License         : Expat
  Programming Lang: Python
  Description     : 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.
 .
 This will simplify the reasoning about what a program does since no hidden
 side effects ever can take place to these data structures. You can rest assured
 that the object you hold a reference to will remain the same throughout its
 lifetime and need not worry that somewhere five stack levels below you in the
 darkest corner of your application someone has decided to remove that element
 that you expected to be there.
 .
 Pyrsistent is influenced by persistent data structures such as those found in
 the standard library of Clojure. The data structures are designed to share
 common elements through path copying. It aims at taking these concepts and
 make them as pythonic as possible so that they can be easily integrated into
 any python program without hassle.
 .
 If you want to go all in on persistent data structures and use literal syntax
 to define them in your code rather than function calls check out Pyrthon.

Note: This is a new dependency of python-jsonschema 3.0.2, which I will upload
right after this package is accepted.