Planning a Python Course for Beginners

[Python]

Marko Rauhamaa wrote:
> Python <python at example.invalid>:
>
>> Marko Rauhamaa wrote:
>>> id() is actually an ideal return value of __hash__(). The only criterion
>>> is that the returned number should be different if the __eq__() is
>>> False. That is definitely true for id().
>>
>> $ python
>> Python 2.7.13 (default, Jan 19 2017, 14:48:08)
>> [GCC 6.3.0 20170118] on linux2
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>> nan = float('NaN')
>>>>> id(nan) == id(nan)
>> True
>>>>> nan == nan
>> False
>>>>>
>
> Point being?

It is a counter example to your claim that if __eq__(...) is false
then id should return different values.