List Equality

[MatzeB]

>>> nan = float("nan")
>>> nan == nan
False
>>> [nan] == [nan]
True

Explanation: In most containers python assumes identical objects must be equal and does not even invoke a comparison function like __eq__.

[georgepsarakis]

@MatzeB as far as I can tell, unfortunately NaN objects generated by float('nan') don't even seem to be identical:

>>> float('nan') is float('nan')
False

I found this great article that analyzes this behavior in detail: https://towardsdatascience.com/navigating-the-hell-of-nans-in-python-71b12558895b

[satwikkansal]

Right, this one is covered in the nan-reflexivity example,