[Python-ideas] Show deprecation warnings in the interactive interpreter

[Terry Reedy]

On 2/25/2015 5:04 PM, Nathaniel Smith wrote:
> On Wed, Feb 25, 2015 at 1:45 PM, Terry Reedy <tjreedy at udel.edu> wrote:
>> On 2/25/2015 3:39 AM, Ben Finney wrote:
>>>
>>> Serhiy Storchaka <storchaka at gmail.com>
>>> writes:
>>>
>>>> What you are think about turning deprecation warnings on by default in
>>>> the interactive interpreter?
>>
>> I don't really get the point.  It seems to me that the idea is to have
>> warnings optionally on during development, always off during production.
>> Most development, especially of 'permanent' code, does not take place at the
>> interactive prompt.
>
> This reasoning seems backwards to me. It doesn't matter whether there
> is also code being developed non-interactively; the question is, for
> that code which *is* developed interactively, should warnings be
> visible by default.

I develop interactively by editing a bit, running, ......, with 
occasional use of the Idle prompt after running.

> BTW, the people around me seem to be developing possibly a majority of
> their code these days by starting out iteratively refining stuff using
> the ipython notebook as a REPL.

You comment actually supports the more important part of my post, which 
you snipped.  An ipython notebook, like Idle, is not the interactive 
interpreter.  It would have to be changed independently, as would Idle. 
  Neither has to wait for an 'official' change.  Idle would not be 
changed by a change only to the official interactive interpreter.  I 
suspect that the same would also be true of ipython, but I am not 
familiar with its implementation as to how it actually runs code entered 
by users.

-- 
Terry Jan Reedy