An oddity in list comparison and element assignment

[Kent Johnson]

michael.f.ellis at gmail.com wrote:
> Hi Alex,
> With all due respect to your well-deserved standing in the Python
> community, I'm not convinced that equality shouldn't imply invariance
> under identical operations.
> 
> Perhaps the most fundamental notion is mathematics is that the left and
> right sides of an equation remain identical after any operation applied
> to both sides.  Our experience of the physical world is similar.  If I
> make identical modifications to the engines of two identical
> automobiles, I expect the difference in performance to be identical.
> If my expectation is met, I would assert that either the two vehicles
> were not identical to begin with or that my modifications were not
> performed identically.

But programming is not mathematics and assignment is not an equation. 
How about this:

In [1]: a=3.0

In [2]: b=3

In [3]: a==b
Out[3]: True

In [4]: a/2 == b/2
Out[4]: False

Kent