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A simple alternative to Python 3 enums.

Project description

Xenum offers a simple alternative to Python 3 enums that’s especially useful for (de)serialization. When you would like to model your enum values so that they survive jumps to and from JSON, databases, and other sources cleanly as strings, Xenum will allow you to do so extremely easily.

Installation

Installation is simple. With python3-pip, do the following:

$ sudo pip install -e .

Or, to install the latest version available on PyPI:

$ sudo pip install xenum

Usage

Just create a basic class with attributes and annotate it with the @xenum attribute. This will convert all of the class attributes into Xenum instances and allow you to easily convert them to strings via str(MyEnum.A) and from strings via MyEnum.by_name("MyEnum.A").

Example

from xenum import xenum, ctor

@xenum
class Actions:
  INSERT = ctor('insert')
  UPDATE = ctor('update')
  DELETE = ctor('delete')

  def __init__(self, name):
     self.name = name

assert Actions.INSERT == Actions.by_name('Actions.INSERT')
assert Actions.INSERT().name == 'insert'

Checkout test.py in the git repo for more usage examples.

Change Log

Version 1.4: September 5th, 2016

  • Add ‘xenum.sref()’ allowing enum values to be instances of the @xenum annotated class, whos *args is prepended with the Xenum instance itself for self-reference.

Version 1.3: September 4th, 2016

  • Add ‘xenum.ctor()’ allowing enum values to be instances of the @xenum annotated class.
  • Made Xenum instances callable, returning the enum’s internal value.

Version 1.2: September 4th, 2016

  • Add ‘values()’ method to @xenum annotated classes for fetching an ordered sequence of the Xenum entities created.

Version 1.1: August 31st, 2016

  • Made Xenum instances hashable, removed value() as a function.

Project details


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