decorators

Provides a decorator to add total ordering to a class using a _compare method.

This is useful in Python 3 when you want to define a single _compare() method and automatically get all comparison methods.

Functions

total_ordering_from_compare(cls)

Decorator that adds total ordering to a class by defining all comparison operators using the _compare(other) method.

total_ordering_from_compare(cls)

Decorator that adds total ordering to a class by defining all comparison operators using the _compare(other) method.

The decorated class must implement:

def _compare(self, other) -> int

Parameters:

cls (type[T]) – A class with a _compare method.

Returns:

The same class with comparison methods __eq__, __ne__, __lt__, __le__, __gt__, __ge__.

Return type:

type[T]

Example

@total_ordering_from_compare class MyObject:

def __init__(self, value):

self.value = value

def _compare(self, other):

return self.value - other.value