Problems using struct pack/unpack in files, and reading them.

[Dave Farrance]

Steven D'Aprano <steve at pearwood.info> wrote:

>On Mon, 16 Nov 2015 05:15 pm, Gregory Ewing wrote:
>
>> Ints are not the only thing that // can be applied to:
>> 
>>  >>> 1.0//0.01
>> 99.0
>
>Good catch!

Hmmm. I see that the float for 0.01 _is_ slightly larger than 0.01

>>> Decimal(0.01)
Decimal('0.01000000000000000020816681711721685132943093776702880859375')

But it seems that 1.0 // 0.01 is not directly equivalent to:

>>> int(1.0 / 0.01)
100

And I see that:

>>> Decimal(1.0 / 0.01)
Decimal('100')
>>> floor(1.0 / 0.01)
100
>>> 0.01 * 100.0 - 1.0
0.0

So I guess that the // operator is _very_ strict in its "floor division"
of floats, but that the "/" operator returns the nearest float value.