Python

Python functools - total_ordering()

Python tip:

You can create an orderable class (assuming the type is totally ordered) with __eq__, one other comparison methods (__ne__, __lt__, __le__, __gt__, __ge__), and the total_ordering decorator.

An example👇

from functools import total_ordering


@total_ordering
class Sample:
    def __init__(self, value):
        self.value = value

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


x = Sample(3)
y = Sample(4)

for expression in ["x == y", "x != y", "x < y", "x <= y", "x > y", "x >= y"]:
    result = eval(expression)
    print(f"{expression} is {result}")


"""
x == y is False
x != y is True
x < y is True
x <= y is True
x > y is False
x >= y is False
"""

Without it, you'd need to define all of the comparison methods.