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[Python-Dev] TextIO seek and tell cookies

Ben Leslie benno at benno.id.au
Mon Sep 26 05:30:17 EDT 2016 
I think the case of JSON or SQL database is even more important though.

tell/seek can return 129-bit integers (maybe even more? my maths might
be off here).

The very large integers that can be returned by tell() will break
serialization to JSON, and storing in a SQL database (at least for
most database types).

What is the value of comparing these to plain integers? Unless you
happen to know the magic encoding it isn't going to be very useful I
think?

Cheers,

Ben

On 25 September 2016 at 21:18, Guido van Rossum <guido at python.org> wrote:
> Be careful though, comparing these to plain integers should probably
> be allowed, and we also should make sure that things like
> serialization via JSON or storing in an SQL database don't break. I
> personally think it's one of those "learn not to touch the stove"
> cases and there's limited value in making this API idiot proof.
>
> On Sun, Sep 25, 2016 at 9:05 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:
>> On 26 September 2016 at 10:21, MRAB <python at mrabarnett.plus.com> wrote:
>>> On 2016-09-26 00:21, Ben Leslie wrote:
>>>> Are there any downsides to this? I've made some progress developing a
>>>> patch to change this functionality. Is it worth polishing and
>>>> submitting?
>>>>
>>> An alternative might be a subclass of int.
>>
>> It could make sense to use a subclass of int that emitted deprecation
>> warnings for integer arithmetic, and then eventually disallowed it
>> entirely.
>>
>> Cheers,
>> Nick.
>>
>> --
>> Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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>
>
> --
> --Guido van Rossum (python.org/~guido)
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