python functools total ordering
===============================

functools.total_ordering makes adding all of six of the rich comparison operators to your custom classes much easier, and more likely that you remember all...

Date: January 14, 2022

functools.total_ordering makes adding all of six of the rich comparison
operators to your custom classes much easier, and more likely that you
remember all of them.

> From the Docs: The class must define one of \_\_lt\_\_(), \_\_le\_\_(),
> \_\_gt\_\_(), or \_\_ge\_\_ In addition, the class should supply an
> \_\_eq\_\_() method.

one of these

* __lt__()
* __le__()
* __gt__()
* __ge__()

and required to have this one

* __eq__()

[Total Ordering Docs](https://docs.python.org/3/library/functools.html#functools.total_ordering)

Here is an example using the Enum I was working on the other day.

``` python
from enum import Enum, auto
from functools import total_ordering

@total_ordering
class LifeCycle(Enum):

 configure = auto()
 glob = auto()
 load = auto()
 pre_render = auto()
 render = auto()
 post_render = auto()
 save = auto()

 def __lt__(self, other):
 try:
 return self.value < other.value
 except AttributeError:
 return self.value < other

 def __eq__(self, other):
 try:
 return self.value == other.value
 except AttributeError:
 return self.value == other

```