__ne__ behavior

point.py

from functools import total_ordering

@total_ordering
class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    __hash__ = None

    def __repr__(self):
        return "Point(%s, %s)" % (self.x, self.y)

    def __eq__(self, other):
        print("eq", self, other)
        if not isinstance(other, Point):
            return False
        return self.x == other.x and self.y == other.y

    def __lt__(self, other):
        return (self.x, self.y) < (other.x, other.y)

What I saw

In [1]: import point
eq Point(1, 1) Point(1, 1)
True
eq Point(1, 1) Point(1, 1)
False
eq Point(3, 2) Point(2, 3)
True
False

In [2]: x = point.Point(1,1)

In [3]: y = point.Point(1,1)

In [4]: z = point.Point(1,2)

In [5]: x == y
eq Point(1, 1) Point(1, 1)
Out[5]: True

In [6]: x != y
eq Point(1, 1) Point(1, 1)
Out[6]: False

In [7]: x == z
eq Point(1, 1) Point(1, 2)
Out[7]: False

In [8]: x != z
eq Point(1, 1) Point(1, 2)
Out[8]: True