Re: IPython 5.0.0b4 out: $ pip install --upgrade ipython prompt_toolkit --pre

Thanks, the following PR should fix it.
https://github.com/ipython/ipython/pull/9631
-- 
M

On Thu, Jun 16, 2016 at 3:51 PM, Aaron Meurer <[email protected]> wrote:
> Seems to be a backwards compatibility break that breaks SymPy (namely, isympy):
>
> Traceback (most recent call last):
>   File "./bin/isympy", line 357, in <module>
>     main()
>   File "./bin/isympy", line 354, in main
>     init_session(ipython, **args)
>   File "/Users/aaronmeurer/Documents/Python/sympy/sympy/sympy/interactive/session.py",
> line 475, in init_session
>     mainloop(message)
> TypeError: mainloop() takes 1 positional argument but 2 were given
>
> Aaron Meurer
>
>
> On Thu, Jun 16, 2016 at 6:45 PM, Matthias Bussonnier
> <[email protected]> wrote:
>> Hi all,
>>
>> TLDR:
>>
>> $ pip install --upgrade ipython prompt_toolkit --pre
>>
>> don't forget to update prompt_toolkit !
>> Most of the following is only relevant if you tried one of the previous beta.
>>
>> Small delay since last beta release, sorry about that,  a few reasons though:
>>
>> - We / I slowed down a bit on the beta release pace, there was a few
>>   bugs/issues/User interface annoyance that needed a new version of
>>   prompt_toolkit, there was no reasons to make extra-beta
>>   without this new version released.
>>
>> - We backed-down on some changes on which we had a few
>>   disagreements (more below).
>>
>> - I got sick, and had to catch up with backlog.
>>
>>
>> Anyway, Jonathan released prompt_toolkit 1.0.1 and 1.0.2, so even if you don't
>> try this new beta, upgrading prompt_toolkit will fix some of your issues.
>>
>> # Move back `TerminalInteractiveShell` to it's old place.
>>
>> The team was split on this one it took a BDFL decision to move forward.
>> One more example that it's good to have a BDFL, as at cuts short discussions.
>>
>> This is the bigger breaking change since 5.0b3, the `TerminalInteractiveshell`
>> moved back from `IPython.terminal.ptshell` to
>> `IPython.terminal.interactiveshell`, if you've updated your project recently to
>> adapt to this change we're sorry, but despite the fact that the version pre 5.0
>> and post 5.0 classes are relatively different the cost of conditional import for
>> project depending on us appeared to be too high. So it's now easier to migrate
>> from 4.0 to 5.0 as the class have the same name, and same location.
>>
>>
>>
>> # Option name and default changed.
>>
>> `TerminalInteractiveShell.display_completions_in_column` is now gone. It was
>> not present on 4.x so no API breakage there, and is now replaced by
>> `TerminalInteractiveShell.display_completions` and is a enum that gained a 3rd
>> mode for the completer: `readlinelike` for those of you that regret readline.
>> This give us more flexibility for further options later. We would
>> appreciate testing of
>> this new layout from vi user. The two other modes now being `column`
>> and `multicolumn`.
>>
>> By popular request, `multicolumn` is not the default value for the
>> previous option.
>>
>> # bug fixed:
>>
>> - quit/exit broken in ipdb
>> - Copy/Past broken on windowm
>> - Unicode broken on windows
>> - function signature garbled when using `object?`
>> - issue with paging text with `?`
>> - completer could get stuck.
>>
>> As usual enjoy. Hopefully this time we are getting close to RC.
>>
>> --
>> M
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