POLL: default to Py3 syntax in Python 3 jupyter kernels?

[Stefan Behnel]

Hi!

Here's a quick poll. Currently, Cython defaults to its Python 2 based
syntax everywhere and full Python 3 syntax and semantics have to be enabled
with the "language_level=3" directive, or with the "%%cython -3" cell magic
in IPython/jupyter notebooks.

In the jupyter notebook, however, the Python version, and thus the syntax
used in the overall notebook, is determined by the running kernel. If that
uses Python 3 syntax for the Python cells, it feels weird to me to require
Python 2 syntax in the Cython cells.

Would anyone object to making Python 3 syntax the default in Cython cells
when using a Python 3 kernel? Do you see any drawbacks?

Personally, I doubt that it would break all that much code. And Python 2
syntax could still be selected with "%%cython -2" if needed.

Stefan

[Francesc Alted]

+1 for Python 3 syntax as default.

Stefan

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Francesc Alted

[MinRK]

+1 to matching the interpreter by default in the magic.

-Min

[Stefan Behnel]

I've pushed this change to master. Let's see if we hear anyone screaming
when we release it. :)

Stefan

[Robert Bradshaw]

I'm in favor of matching the environment.

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[Fernando Perez]

On Fri, Sep 2, 2016 at 2:25 AM, MinRK <benja...@gmail.com> wrote:

+1 to matching the interpreter by default in the magic.

+1, that would be best semantics IMO

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[Big Stone]

If Cython syntax was 100% compatible with Python syntax, current situation ("legacy syntax" or "not released syntax) would be considered as a bug.

"+1" for this change

[Stefan Behnel]

Big Stone schrieb am 04.09.2016 um 17:27:
> If Cython syntax was 100% compatible with Python syntax, current situation
> ("legacy syntax" or "not released syntax) would be considered as a bug.

My personal take on this is that a) it's compatible enough for all
realistic use cases and b) the special "cdef" syntax is not going to go
away, ever, because it's very concise and well adapted to its purpose.

Stefan

[Robert Bradshaw]

On Sun, Sep 4, 2016 at 8:27 AM, Big Stone <stone...@gmail.com> wrote:
> If Cython syntax was 100% compatible with Python syntax, current situation
> ("legacy syntax" or "not released syntax) would be considered as a bug.

I'm not quite following what you're saying here--the question would
still be whether to be 100% compatible with Python 2 syntax or 100%
compatible with Python 3 syntax,

> "+1" for this change
>
>
>
>
> On Friday, September 2, 2016 at 9:52:07 AM UTC+2, Stefan Behnel wrote:
>>
>> Hi!
>>
>> Here's a quick poll. Currently, Cython defaults to its Python 2 based
>> syntax everywhere and full Python 3 syntax and semantics have to be
>> enabled
>> with the "language_level=3" directive, or with the "%%cython -3" cell
>> magic
>> in IPython/jupyter notebooks.
>>
>> In the jupyter notebook, however, the Python version, and thus the syntax
>> used in the overall notebook, is determined by the running kernel. If that
>> uses Python 3 syntax for the Python cells, it feels weird to me to require
>> Python 2 syntax in the Cython cells.
>>
>> Would anyone object to making Python 3 syntax the default in Cython cells
>> when using a Python 3 kernel? Do you see any drawbacks?
>>
>> Personally, I doubt that it would break all that much code. And Python 2
>> syntax could still be selected with "%%cython -2" if needed.
>>
>> Stefan
>

[Big Stone]

Hi,

I vote for "100% compatible with Python syntax of the running Python Kernel interpreter" .

[Hai Nguyen]

On Tue, Sep 6, 2016 at 12:33 PM, Big Stone <stone...@gmail.com> wrote:

Hi,

I vote for "100% compatible with Python syntax of the running Python Kernel interpreter" .

 

me too.

Hai