[Python-ideas] Fwd: Make `float('inf') //1 == float('inf')`

[Alexander Belopolsky]

On Thu, Sep 18, 2014 at 11:20 AM, Ian Cordasco <graffatcolmingov at gmail.com>
wrote:

> I understand that intuitively float('inf') // 1 being equal to
> infinity is nice, but it is inherently undefined. We don't really have
> the concept of undefined so NaN seems most acceptable.
>

The most acceptable would be to have x // 1 do the same as math.floor(x)
for any float x.  Note that math.floor() behavior changed from 2.x to 3.x:

Python 2.7.7:
>>> math.floor(float('inf'))
inf

Python 3.4.1:
>>> math.floor(float('inf'))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: cannot convert float infinity to integer

It looks like float // float case was overlooked when it was decided that
math.floor() should return int.
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