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730 lines
26 KiB
Plaintext
Metadata-Version: 2.1
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Name: pyrsistent
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Version: 0.14.11
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Summary: Persistent/Functional/Immutable data structures
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Home-page: http://github.com/tobgu/pyrsistent/
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Author: Tobias Gustafsson
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Author-email: tobias.l.gustafsson@gmail.com
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License: MIT
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Platform: UNKNOWN
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Classifier: Intended Audience :: Developers
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Classifier: License :: OSI Approved :: MIT License
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Classifier: Operating System :: OS Independent
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Classifier: Programming Language :: Python :: 2.7
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Classifier: Programming Language :: Python :: 3.4
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Classifier: Programming Language :: Python :: 3.5
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Classifier: Programming Language :: Python :: 3.6
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Classifier: Programming Language :: Python :: 3.7
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Classifier: Programming Language :: Python :: Implementation :: PyPy
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Requires-Dist: six
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Pyrsistent
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==========
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.. image:: https://travis-ci.org/tobgu/pyrsistent.png?branch=master
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:target: https://travis-ci.org/tobgu/pyrsistent
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.. image:: https://badge.fury.io/py/pyrsistent.svg
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:target: https://badge.fury.io/py/pyrsistent
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.. image:: https://coveralls.io/repos/tobgu/pyrsistent/badge.svg?branch=master&service=github
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:target: https://coveralls.io/github/tobgu/pyrsistent?branch=master
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.. _Pyrthon: https://www.github.com/tobgu/pyrthon/
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Pyrsistent is a number of persistent collections (by some referred to as functional data structures). Persistent in
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the sense that they are immutable.
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All methods on a data structure that would normally mutate it instead return a new copy of the structure containing the
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requested updates. The original structure is left untouched.
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This will simplify the reasoning about what a program does since no hidden side effects ever can take place to these
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data structures. You can rest assured that the object you hold a reference to will remain the same throughout its
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lifetime and need not worry that somewhere five stack levels below you in the darkest corner of your application
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someone has decided to remove that element that you expected to be there.
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Pyrsistent is influenced by persistent data structures such as those found in the standard library of Clojure. The
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data structures are designed to share common elements through path copying.
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It aims at taking these concepts and make them as pythonic as possible so that they can be easily integrated into any python
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program without hassle.
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If you want to go all in on persistent data structures and use literal syntax to define them in your code rather
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than function calls check out Pyrthon_.
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Examples
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--------
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.. _Sequence: collections_
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.. _Hashable: collections_
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.. _Mapping: collections_
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.. _Mappings: collections_
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.. _Set: collections_
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.. _collections: https://docs.python.org/3/library/collections.abc.html
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.. _documentation: http://pyrsistent.readthedocs.org/
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The collection types and key features currently implemented are:
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* PVector_, similar to a python list
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* PMap_, similar to dict
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* PSet_, similar to set
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* PRecord_, a PMap on steroids with fixed fields, optional type and invariant checking and much more
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* PClass_, a Python class fixed fields, optional type and invariant checking and much more
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* `Checked collections`_, PVector, PMap and PSet with optional type and invariance checks and more
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* PBag, similar to collections.Counter
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* PList, a classic singly linked list
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* PDeque, similar to collections.deque
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* Immutable object type (immutable) built on the named tuple
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* freeze_ and thaw_ functions to convert between pythons standard collections and pyrsistent collections.
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* Flexible transformations_ of arbitrarily complex structures built from PMaps and PVectors.
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Below are examples of common usage patterns for some of the structures and features. More information and
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full documentation for all data structures is available in the documentation_.
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.. _PVector:
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PVector
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~~~~~~~
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With full support for the Sequence_ protocol PVector is meant as a drop in replacement to the built in list from a readers
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point of view. Write operations of course differ since no in place mutation is done but naming should be in line
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with corresponding operations on the built in list.
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Support for the Hashable_ protocol also means that it can be used as key in Mappings_.
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Appends are amortized O(1). Random access and insert is log32(n) where n is the size of the vector.
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.. code:: python
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>>> from pyrsistent import v, pvector
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# No mutation of vectors once created, instead they
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# are "evolved" leaving the original untouched
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>>> v1 = v(1, 2, 3)
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>>> v2 = v1.append(4)
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>>> v3 = v2.set(1, 5)
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>>> v1
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pvector([1, 2, 3])
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>>> v2
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pvector([1, 2, 3, 4])
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>>> v3
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pvector([1, 5, 3, 4])
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# Random access and slicing
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>>> v3[1]
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5
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>>> v3[1:3]
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pvector([5, 3])
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# Iteration
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>>> list(x + 1 for x in v3)
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[2, 6, 4, 5]
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>>> pvector(2 * x for x in range(3))
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pvector([0, 2, 4])
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.. _PMap:
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PMap
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~~~~
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With full support for the Mapping_ protocol PMap is meant as a drop in replacement to the built in dict from a readers point
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of view. Support for the Hashable_ protocol also means that it can be used as key in other Mappings_.
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Random access and insert is log32(n) where n is the size of the map.
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.. code:: python
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>>> from pyrsistent import m, pmap, v
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# No mutation of maps once created, instead they are
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# "evolved" leaving the original untouched
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>>> m1 = m(a=1, b=2)
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>>> m2 = m1.set('c', 3)
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>>> m3 = m2.set('a', 5)
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>>> m1
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pmap({'a': 1, 'b': 2})
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>>> m2
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pmap({'a': 1, 'c': 3, 'b': 2})
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>>> m3
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pmap({'a': 5, 'c': 3, 'b': 2})
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>>> m3['a']
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5
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# Evolution of nested persistent structures
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>>> m4 = m(a=5, b=6, c=v(1, 2))
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>>> m4.transform(('c', 1), 17)
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pmap({'a': 5, 'c': pvector([1, 17]), 'b': 6})
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>>> m5 = m(a=1, b=2)
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# Evolve by merging with other mappings
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>>> m5.update(m(a=2, c=3), {'a': 17, 'd': 35})
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pmap({'a': 17, 'c': 3, 'b': 2, 'd': 35})
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>>> pmap({'x': 1, 'y': 2}) + pmap({'y': 3, 'z': 4})
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pmap({'y': 3, 'x': 1, 'z': 4})
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# Dict-like methods to convert to list and iterate
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>>> m3.items()
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pvector([('a', 5), ('c', 3), ('b', 2)])
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>>> list(m3)
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['a', 'c', 'b']
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.. _PSet:
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PSet
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~~~~
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With full support for the Set_ protocol PSet is meant as a drop in replacement to the built in set from a readers point
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of view. Support for the Hashable_ protocol also means that it can be used as key in Mappings_.
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Random access and insert is log32(n) where n is the size of the set.
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.. code:: python
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>>> from pyrsistent import s
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# No mutation of sets once created, you know the story...
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>>> s1 = s(1, 2, 3, 2)
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>>> s2 = s1.add(4)
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>>> s3 = s1.remove(1)
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>>> s1
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pset([1, 2, 3])
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>>> s2
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pset([1, 2, 3, 4])
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>>> s3
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pset([2, 3])
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# Full support for set operations
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>>> s1 | s(3, 4, 5)
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pset([1, 2, 3, 4, 5])
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>>> s1 & s(3, 4, 5)
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pset([3])
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>>> s1 < s2
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True
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>>> s1 < s(3, 4, 5)
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False
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.. _PRecord:
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PRecord
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~~~~~~~
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A PRecord is a PMap with a fixed set of specified fields. Records are declared as python classes inheriting
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from PRecord. Because it is a PMap it has full support for all Mapping methods such as iteration and element
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access using subscript notation.
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.. code:: python
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>>> from pyrsistent import PRecord, field
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>>> class ARecord(PRecord):
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... x = field()
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...
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>>> r = ARecord(x=3)
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>>> r
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ARecord(x=3)
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>>> r.x
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3
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>>> r.set(x=2)
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ARecord(x=2)
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>>> r.set(y=2)
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Traceback (most recent call last):
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AttributeError: 'y' is not among the specified fields for ARecord
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Type information
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****************
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It is possible to add type information to the record to enforce type checks. Multiple allowed types can be specified
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by providing an iterable of types.
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.. code:: python
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>>> class BRecord(PRecord):
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... x = field(type=int)
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... y = field(type=(int, type(None)))
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...
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>>> BRecord(x=3, y=None)
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BRecord(y=None, x=3)
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>>> BRecord(x=3.0)
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Traceback (most recent call last):
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PTypeError: Invalid type for field BRecord.x, was float
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Custom types (classes) that are iterable should be wrapped in a tuple to prevent their
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members being added to the set of valid types. Although Enums in particular are now
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supported without wrapping, see #83 for more information.
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Mandatory fields
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****************
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Fields are not mandatory by default but can be specified as such. If fields are missing an
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*InvariantException* will be thrown which contains information about the missing fields.
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.. code:: python
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>>> from pyrsistent import InvariantException
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>>> class CRecord(PRecord):
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... x = field(mandatory=True)
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...
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>>> r = CRecord(x=3)
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>>> try:
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... r.discard('x')
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... except InvariantException as e:
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... print(e.missing_fields)
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...
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('CRecord.x',)
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Invariants
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**********
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It is possible to add invariants that must hold when evolving the record. Invariants can be
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specified on both field and record level. If invariants fail an *InvariantException* will be
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thrown which contains information about the failing invariants. An invariant function should
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return a tuple consisting of a boolean that tells if the invariant holds or not and an object
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describing the invariant. This object can later be used to identify which invariant that failed.
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The global invariant function is only executed if all field invariants hold.
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Global invariants are inherited to subclasses.
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.. code:: python
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>>> class RestrictedVector(PRecord):
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... __invariant__ = lambda r: (r.y >= r.x, 'x larger than y')
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... x = field(invariant=lambda x: (x > 0, 'x negative'))
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... y = field(invariant=lambda y: (y > 0, 'y negative'))
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...
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>>> r = RestrictedVector(y=3, x=2)
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>>> try:
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... r.set(x=-1, y=-2)
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... except InvariantException as e:
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... print(e.invariant_errors)
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...
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('y negative', 'x negative')
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>>> try:
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... r.set(x=2, y=1)
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... except InvariantException as e:
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... print(e.invariant_errors)
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...
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('x larger than y',)
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Invariants may also contain multiple assertions. For those cases the invariant function should
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return a tuple of invariant tuples as described above. This structure is reflected in the
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invariant_errors attribute of the exception which will contain tuples with data from all failed
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invariants. Eg:
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.. code:: python
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>>> class EvenX(PRecord):
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... x = field(invariant=lambda x: ((x > 0, 'x negative'), (x % 2 == 0, 'x odd')))
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...
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>>> try:
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... EvenX(x=-1)
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... except InvariantException as e:
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... print(e.invariant_errors)
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...
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(('x negative', 'x odd'),)
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Factories
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*********
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It's possible to specify factory functions for fields. The factory function receives whatever
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is supplied as field value and the actual returned by the factory is assigned to the field
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given that any type and invariant checks hold.
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PRecords have a default factory specified as a static function on the class, create(). It takes
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a *Mapping* as argument and returns an instance of the specific record.
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If a record has fields of type PRecord the create() method of that record will
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be called to create the "sub record" if no factory has explicitly been specified to override
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this behaviour.
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.. code:: python
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>>> class DRecord(PRecord):
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... x = field(factory=int)
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...
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>>> class ERecord(PRecord):
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... d = field(type=DRecord)
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...
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>>> ERecord.create({'d': {'x': '1'}})
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ERecord(d=DRecord(x=1))
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Collection fields
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*****************
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It is also possible to have fields with ``pyrsistent`` collections.
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.. code:: python
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>>> from pyrsistent import pset_field, pmap_field, pvector_field
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>>> class MultiRecord(PRecord):
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... set_of_ints = pset_field(int)
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... map_int_to_str = pmap_field(int, str)
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... vector_of_strs = pvector_field(str)
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...
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Serialization
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*************
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PRecords support serialization back to dicts. Default serialization will take keys and values
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"as is" and output them into a dict. It is possible to specify custom serialization functions
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to take care of fields that require special treatment.
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.. code:: python
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>>> from datetime import date
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>>> class Person(PRecord):
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... name = field(type=unicode)
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... birth_date = field(type=date,
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... serializer=lambda format, d: d.strftime(format['date']))
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...
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>>> john = Person(name=u'John', birth_date=date(1985, 10, 21))
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>>> john.serialize({'date': '%Y-%m-%d'})
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{'birth_date': '1985-10-21', 'name': u'John'}
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.. _instar: https://github.com/boxed/instar/
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.. _PClass:
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PClass
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~~~~~~
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A PClass is a python class with a fixed set of specified fields. PClasses are declared as python classes inheriting
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from PClass. It is defined the same way that PRecords are and behaves like a PRecord in all aspects except that it
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is not a PMap and hence not a collection but rather a plain Python object.
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.. code:: python
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>>> from pyrsistent import PClass, field
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>>> class AClass(PClass):
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... x = field()
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...
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>>> a = AClass(x=3)
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>>> a
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AClass(x=3)
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>>> a.x
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3
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Checked collections
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~~~~~~~~~~~~~~~~~~~
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Checked collections currently come in three flavors: CheckedPVector, CheckedPMap and CheckedPSet.
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.. code:: python
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>>> from pyrsistent import CheckedPVector, CheckedPMap, CheckedPSet, thaw
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>>> class Positives(CheckedPSet):
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... __type__ = (long, int)
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... __invariant__ = lambda n: (n >= 0, 'Negative')
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...
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>>> class Lottery(PRecord):
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... name = field(type=str)
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... numbers = field(type=Positives, invariant=lambda p: (len(p) > 0, 'No numbers'))
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...
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>>> class Lotteries(CheckedPVector):
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... __type__ = Lottery
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...
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>>> class LotteriesByDate(CheckedPMap):
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... __key_type__ = date
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... __value_type__ = Lotteries
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...
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>>> lotteries = LotteriesByDate.create({date(2015, 2, 15): [{'name': 'SuperLotto', 'numbers': {1, 2, 3}},
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... {'name': 'MegaLotto', 'numbers': {4, 5, 6}}],
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... date(2015, 2, 16): [{'name': 'SuperLotto', 'numbers': {3, 2, 1}},
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... {'name': 'MegaLotto', 'numbers': {6, 5, 4}}]})
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>>> lotteries
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LotteriesByDate({datetime.date(2015, 2, 15): Lotteries([Lottery(numbers=Positives([1, 2, 3]), name='SuperLotto'), Lottery(numbers=Positives([4, 5, 6]), name='MegaLotto')]), datetime.date(2015, 2, 16): Lotteries([Lottery(numbers=Positives([1, 2, 3]), name='SuperLotto'), Lottery(numbers=Positives([4, 5, 6]), name='MegaLotto')])})
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# The checked versions support all operations that the corresponding
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# unchecked types do
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>>> lottery_0215 = lotteries[date(2015, 2, 15)]
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>>> lottery_0215.transform([0, 'name'], 'SuperDuperLotto')
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Lotteries([Lottery(numbers=Positives([1, 2, 3]), name='SuperDuperLotto'), Lottery(numbers=Positives([4, 5, 6]), name='MegaLotto')])
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# But also makes asserts that types and invariants hold
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>>> lottery_0215.transform([0, 'name'], 999)
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Traceback (most recent call last):
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PTypeError: Invalid type for field Lottery.name, was int
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>>> lottery_0215.transform([0, 'numbers'], set())
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Traceback (most recent call last):
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InvariantException: Field invariant failed
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# They can be converted back to python built ins with either thaw()
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# or serialize() (which provides possibilities to customize serialization)
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>>> thaw(lottery_0215)
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[{'numbers': set([1, 2, 3]), 'name': 'SuperLotto'}, {'numbers': set([4, 5, 6]), 'name': 'MegaLotto'}]
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>>> lottery_0215.serialize()
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[{'numbers': set([1, 2, 3]), 'name': 'SuperLotto'}, {'numbers': set([4, 5, 6]), 'name': 'MegaLotto'}]
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.. _transformations:
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Transformations
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~~~~~~~~~~~~~~~
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Transformations are inspired by the cool library instar_ for Clojure. They let you evolve PMaps and PVectors
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with arbitrarily deep/complex nesting using simple syntax and flexible matching syntax.
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The first argument to transformation is the path that points out the value to transform. The
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second is the transformation to perform. If the transformation is callable it will be applied
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to the value(s) matching the path. The path may also contain callables. In that case they are
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treated as matchers. If the matcher returns True for a specific key it is considered for transformation.
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.. code:: python
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# Basic examples
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>>> from pyrsistent import inc, freeze, thaw, rex, ny, discard
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>>> v1 = freeze([1, 2, 3, 4, 5])
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>>> v1.transform([2], inc)
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pvector([1, 2, 4, 4, 5])
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>>> v1.transform([lambda ix: 0 < ix < 4], 8)
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pvector([1, 8, 8, 8, 5])
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>>> v1.transform([lambda ix, v: ix == 0 or v == 5], 0)
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pvector([0, 2, 3, 4, 0])
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# The (a)ny matcher can be used to match anything
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>>> v1.transform([ny], 8)
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pvector([8, 8, 8, 8, 8])
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# Regular expressions can be used for matching
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>>> scores = freeze({'John': 12, 'Joseph': 34, 'Sara': 23})
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>>> scores.transform([rex('^Jo')], 0)
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pmap({'Joseph': 0, 'Sara': 23, 'John': 0})
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# Transformations can be done on arbitrarily deep structures
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>>> news_paper = freeze({'articles': [{'author': 'Sara', 'content': 'A short article'},
|
|
... {'author': 'Steve', 'content': 'A slightly longer article'}],
|
|
... 'weather': {'temperature': '11C', 'wind': '5m/s'}})
|
|
>>> short_news = news_paper.transform(['articles', ny, 'content'], lambda c: c[:25] + '...' if len(c) > 25 else c)
|
|
>>> very_short_news = news_paper.transform(['articles', ny, 'content'], lambda c: c[:15] + '...' if len(c) > 15 else c)
|
|
>>> very_short_news.articles[0].content
|
|
'A short article'
|
|
>>> very_short_news.articles[1].content
|
|
'A slightly long...'
|
|
|
|
# When nothing has been transformed the original data structure is kept
|
|
>>> short_news is news_paper
|
|
True
|
|
>>> very_short_news is news_paper
|
|
False
|
|
>>> very_short_news.articles[0] is news_paper.articles[0]
|
|
True
|
|
|
|
# There is a special transformation that can be used to discard elements. Also
|
|
# multiple transformations can be applied in one call
|
|
>>> thaw(news_paper.transform(['weather'], discard, ['articles', ny, 'content'], discard))
|
|
{'articles': [{'author': 'Sara'}, {'author': 'Steve'}]}
|
|
|
|
Evolvers
|
|
~~~~~~~~
|
|
PVector, PMap and PSet all have support for a concept dubbed *evolvers*. An evolver acts like a mutable
|
|
view of the underlying persistent data structure with "transaction like" semantics. No updates of the original
|
|
data structure is ever performed, it is still fully immutable.
|
|
|
|
The evolvers have a very limited API by design to discourage excessive, and inappropriate, usage as that would
|
|
take us down the mutable road. In principle only basic mutation and element access functions are supported.
|
|
Check out the documentation_ of each data structure for specific examples.
|
|
|
|
Examples of when you may want to use an evolver instead of working directly with the data structure include:
|
|
|
|
* Multiple updates are done to the same data structure and the intermediate results are of no
|
|
interest. In this case using an evolver may be a more efficient and easier to work with.
|
|
* You need to pass a vector into a legacy function or a function that you have no control
|
|
over which performs in place mutations. In this case pass an evolver instance
|
|
instead and then create a new pvector from the evolver once the function returns.
|
|
|
|
.. code:: python
|
|
|
|
>>> from pyrsistent import v
|
|
|
|
# In place mutation as when working with the built in counterpart
|
|
>>> v1 = v(1, 2, 3)
|
|
>>> e = v1.evolver()
|
|
>>> e[1] = 22
|
|
>>> e = e.append(4)
|
|
>>> e = e.extend([5, 6])
|
|
>>> e[5] += 1
|
|
>>> len(e)
|
|
6
|
|
|
|
# The evolver is considered *dirty* when it contains changes compared to the underlying vector
|
|
>>> e.is_dirty()
|
|
True
|
|
|
|
# But the underlying pvector still remains untouched
|
|
>>> v1
|
|
pvector([1, 2, 3])
|
|
|
|
# Once satisfied with the updates you can produce a new pvector containing the updates.
|
|
# The new pvector will share data with the original pvector in the same way that would have
|
|
# been done if only using operations on the pvector.
|
|
>>> v2 = e.persistent()
|
|
>>> v2
|
|
pvector([1, 22, 3, 4, 5, 7])
|
|
|
|
# The evolver is now no longer considered *dirty* as it contains no differences compared to the
|
|
# pvector just produced.
|
|
>>> e.is_dirty()
|
|
False
|
|
|
|
# You may continue to work with the same evolver without affecting the content of v2
|
|
>>> e[0] = 11
|
|
|
|
# Or create a new evolver from v2. The two evolvers can be updated independently but will both
|
|
# share data with v2 where possible.
|
|
>>> e2 = v2.evolver()
|
|
>>> e2[0] = 1111
|
|
>>> e.persistent()
|
|
pvector([11, 22, 3, 4, 5, 7])
|
|
>>> e2.persistent()
|
|
pvector([1111, 22, 3, 4, 5, 7])
|
|
|
|
.. _freeze:
|
|
.. _thaw:
|
|
|
|
freeze and thaw
|
|
~~~~~~~~~~~~~~~
|
|
These functions are great when your cozy immutable world has to interact with the evil mutable world outside.
|
|
|
|
.. code:: python
|
|
|
|
>>> from pyrsistent import freeze, thaw, v, m
|
|
>>> freeze([1, {'a': 3}])
|
|
pvector([1, pmap({'a': 3})])
|
|
>>> thaw(v(1, m(a=3)))
|
|
[1, {'a': 3}]
|
|
|
|
Compatibility
|
|
-------------
|
|
|
|
Pyrsistent is developed and tested on Python 2.6, 2.7, 3.4, 3.5, 3.6 and PyPy (Python 2 and 3 compatible). It will most
|
|
likely work on all other versions >= 3.4 but no guarantees are given. :)
|
|
|
|
Compatibility issues
|
|
~~~~~~~~~~~~~~~~~~~~
|
|
|
|
.. _27: https://github.com/tobgu/pyrsistent/issues/27
|
|
|
|
There is currently one known compatibility issue when comparing built in sets and frozensets to PSets as discussed in 27_.
|
|
It affects python 2 versions < 2.7.8 and python 3 versions < 3.4.0 and is due to a bug described in
|
|
http://bugs.python.org/issue8743.
|
|
|
|
Comparisons will fail or be incorrect when using the set/frozenset as left hand side of the comparison. As a workaround
|
|
you need to either upgrade Python to a more recent version, avoid comparing sets/frozensets with PSets or always make
|
|
sure to convert both sides of the comparison to the same type before performing the comparison.
|
|
|
|
Performance
|
|
-----------
|
|
|
|
Pyrsistent is developed with performance in mind. Still, while some operations are nearly on par with their built in,
|
|
mutable, counterparts in terms of speed, other operations are slower. In the cases where attempts at
|
|
optimizations have been done, speed has generally been valued over space.
|
|
|
|
Pyrsistent comes with two API compatible flavors of PVector (on which PMap and PSet are based), one pure Python
|
|
implementation and one implemented as a C extension. The latter generally being 2 - 20 times faster than the former.
|
|
The C extension will be used automatically when possible.
|
|
|
|
The pure python implementation is fully PyPy compatible. Running it under PyPy speeds operations up considerably if
|
|
the structures are used heavily (if JITed), for some cases the performance is almost on par with the built in counterparts.
|
|
|
|
Type hints
|
|
----------
|
|
|
|
PEP 561 style type hints for use with mypy and various editors are available for most types and functions in pyrsistent.
|
|
|
|
Type classes for annotating your own code with pyrsistent types are also available under pyrsistent.typing.
|
|
|
|
Installation
|
|
------------
|
|
|
|
pip install pyrsistent
|
|
|
|
Documentation
|
|
-------------
|
|
|
|
Available at http://pyrsistent.readthedocs.org/
|
|
|
|
Brief presentation available at http://slides.com/tobiasgustafsson/immutability-and-python/
|
|
|
|
Contributors
|
|
------------
|
|
|
|
Tobias Gustafsson https://github.com/tobgu
|
|
|
|
Christopher Armstrong https://github.com/radix
|
|
|
|
Anders Hovmöller https://github.com/boxed
|
|
|
|
Itamar Turner-Trauring https://github.com/itamarst
|
|
|
|
Jonathan Lange https://github.com/jml
|
|
|
|
Richard Futrell https://github.com/Futrell
|
|
|
|
Jakob Hollenstein https://github.com/jkbjh
|
|
|
|
David Honour https://github.com/foolswood
|
|
|
|
David R. MacIver https://github.com/DRMacIver
|
|
|
|
Marcus Ewert https://github.com/sarum90
|
|
|
|
Jean-Paul Calderone https://github.com/exarkun
|
|
|
|
Douglas Treadwell https://github.com/douglas-treadwell
|
|
|
|
Travis Parker https://github.com/teepark
|
|
|
|
Julian Berman https://github.com/Julian
|
|
|
|
Dennis Tomas https://github.com/dtomas
|
|
|
|
Neil Vyas https://github.com/neilvyas
|
|
|
|
doozr https://github.com/doozr
|
|
|
|
Kamil Galuszka https://github.com/galuszkak
|
|
|
|
Tsuyoshi Hombashi https://github.com/thombashi
|
|
|
|
nattofriends https://github.com/nattofriends
|
|
|
|
agberk https://github.com/agberk
|
|
|
|
Waleed Khan https://github.com/arxanas
|
|
|
|
Jean-Louis Fuchs https://github.com/ganwell
|
|
|
|
Carlos Corbacho https://github.com/ccorbacho
|
|
|
|
Felix Yan https://github.com/felixonmars
|
|
|
|
benrg https://github.com/benrg
|
|
|
|
Contributing
|
|
------------
|
|
|
|
Want to contribute? That's great! If you experience problems please log them on GitHub. If you want to contribute code,
|
|
please fork the repository and submit a pull request.
|
|
|
|
Run tests
|
|
~~~~~~~~~
|
|
.. _tox: https://tox.readthedocs.io/en/latest/
|
|
|
|
Tests can be executed using tox_.
|
|
|
|
Install tox: ``pip install tox``
|
|
|
|
Run test for Python 2.7: ``tox -epy27``
|
|
|
|
Release
|
|
~~~~~~~
|
|
* Update CHANGES.txt
|
|
* Update README with any new contributors and potential info needed.
|
|
* Update _pyrsistent_version.py
|
|
* python setup.py sdist upload
|
|
* Commit and tag with new version: git add -u . && git commit -m 'Prepare version vX.Y.Z' && git tag -a vX.Y.Z -m 'vX.Y.Z'
|
|
* Push commit and tags: git push && git push --tags
|
|
|
|
Project status
|
|
--------------
|
|
Pyrsistent can be considered stable and mature (who knows, there may even be a 1.0 some day :-)). The project is
|
|
maintained, bugs fixed, PRs reviewed and merged and new releases made. I currently do not have time for development
|
|
of new features or functionality which I don't have use for myself. I'm more than happy to take PRs for new
|
|
functionality though!
|
|
|
|
There are a bunch of issues marked with ``enhancement`` and ``help wanted`` that contain requests for new functionality
|
|
that would be nice to include. The level of difficulty and extend of the issues varies, please reach out to me if you're
|
|
interested in working on any of them.
|
|
|
|
If you feel that you have a grand master plan for where you would like Pyrsistent to go and have the time to put into
|
|
it please don't hesitate to discuss this with me and submit PRs for it. If all goes well I'd be more than happy to add
|
|
additional maintainers to the project!
|
|
|
|
|