Questions on the Python Shell

[Paulo Teotonio Sobrinho]

Hi

I'm playing with the new python shell dialog and I must say, it is really
useful! To give one example, one can interactively learn the python
interface much faster than any other way, specially people like me that
are not experienced programmers.

I have some questions regarding the python shell

1) K3d 0.7.11.0 does not have really usable shell. On the other hand
0.7.12.0 has a nice python shell but the mesh module will be off for some
time. I would like to have both. How can I build 0.7.11.0 but with the
newest python shell? I tried to copy ngui_python_shell/dialog.cpp over the
old one, but it did not work.

2) It seems that line editing in 0.7.12.0 python shell is not working. For
example, I am able to move the cursor to any point on a line of text, but
I can not erase or insert any character.

3) Can I get a python shell inside of a Scripted Node? In the same way as
for document context scripts, I think that would be useful for exploring,
testing and developing scripted node codes.

Thanks,
  Paulo

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[Timothy M. Shead]

Paulo Teotonio Sobrinho wrote:
> Hi
>
> I'm playing with the new python shell dialog and I must say, it is really
> useful! To give one example, one can interactively learn the python
> interface much faster than any other way, specially people like me that
> are not experienced programmers.

Glad to hear it!

> I have some questions regarding the python shell
>
> 1) K3d 0.7.11.0 does not have really usable shell. On the other hand
> 0.7.12.0 has a nice python shell but the mesh module will be off for some
> time. I would like to have both. How can I build 0.7.11.0 but with the
> newest python shell? I tried to copy ngui_python_shell/dialog.cpp over the
> old one, but it did not work.

Hopefully the mesh module won't be off for long :)  In the meantime,
multiple files changed to implement the Python shell.  If you want to
backport it, you'll have to use svn to look at the history and see
everything that changed.  This is technically feasible, but you'll have
to do the homework.

> 2) It seems that line editing in 0.7.12.0 python shell is not working. For
> example, I am able to move the cursor to any point on a line of text, but
> I can not erase or insert any character.

This is by-design - the Python shell works like any other - once you
enter a command with the "return" key, it becomes part of the shell
history.  Editing it after the fact wouldn't make any sense, since the
command has already been executed by the Python interpreter.  You seem
to want some kind of hybrid between a text editor and an interactive
interpreter.  I'm open to the idea, but I've never seen such a thing.
Got an example?

> 3) Can I get a python shell inside of a Scripted Node? In the same way as
> for document context scripts, I think that would be useful for exploring,
> testing and developing scripted node codes.

A scripted node executes its script whenever its output needs to be
updated, so it isn't clear how one would use an interactive shell in
that context.

Cheers,
Tim

[tshead.vcf]

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url:www.k-3d.org
version:2.1
end:vcard

---

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[bART Janssens-2]

On Tue, Jul 7, 2009 at 2:30 AM, Timothy M. Shead<tshead@...> wrote:

> Paulo Teotonio Sobrinho wrote:
>> Hi
>>
>> I'm playing with the new python shell dialog and I must say, it is really
>> useful! To give one example, one can interactively learn the python
>> interface much faster than any other way, specially people like me that
>> are not experienced programmers.
>
> Glad to hear it!
>
>> I have some questions regarding the python shell
>>
>> 1) K3d 0.7.11.0 does not have really usable shell. On the other hand
>> 0.7.12.0 has a nice python shell but the mesh module will be off for some
>> time. I would like to have both. How can I build 0.7.11.0 but with the
>> newest python shell? I tried to copy ngui_python_shell/dialog.cpp over the
>> old one, but it did not work.
>
> Hopefully the mesh module won't be off for long :)  In the meantime,
> multiple files changed to implement the Python shell.  If you want to
> backport it, you'll have to use svn to look at the history and see
> everything that changed.  This is technically feasible, but you'll have
> to do the homework.
>
>> 2) It seems that line editing in 0.7.12.0 python shell is not working. For
>> example, I am able to move the cursor to any point on a line of text, but
>> I can not erase or insert any character.
>
> This is by-design - the Python shell works like any other - once you
> enter a command with the "return" key, it becomes part of the shell
> history.  Editing it after the fact wouldn't make any sense, since the
> command has already been executed by the Python interpreter.  You seem
> to want some kind of hybrid between a text editor and an interactive
> interpreter.  I'm open to the idea, but I've never seen such a thing.
> Got an example?

I think this really was a bug: moving somewhere in the middle of a
non-submitted line of code did not allow editing. I fixed this in my
branch, see changeset:
http://code.google.com/p/k3d-bart/source/detail?r=9c859a8ea62a22817ea44f236fcf150ee0dce7c9

Cheers,

--
Bart

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[Timothy M. Shead]

Bart Janssens wrote:
> On Tue, Jul 7, 2009 at 2:30 AM, Timothy M. Shead<tshead@...> wrote:
>> Paulo Teotonio Sobrinho wrote:

>>> 2) It seems that line editing in 0.7.12.0 python shell is not working. For
>>> example, I am able to move the cursor to any point on a line of text, but
>>> I can not erase or insert any character.

>> This is by-design - the Python shell works like any other - once you
>> enter a command with the "return" key, it becomes part of the shell
>> history.  Editing it after the fact wouldn't make any sense, since the
>> command has already been executed by the Python interpreter.  You seem
>> to want some kind of hybrid between a text editor and an interactive
>> interpreter.  I'm open to the idea, but I've never seen such a thing.
>> Got an example?

> I think this really was a bug: moving somewhere in the middle of a
> non-submitted line of code did not allow editing. I fixed this in my
> branch, see changeset:
> http://code.google.com/p/k3d-bart/source/detail?r=9c859a8ea62a22817ea44f236fcf150ee0dce7c9

My mistake, I see what you mean now.  Although I'm not giving-up on my
lifelong dream of a hybrid text editor / interactive shell ;)

I notice that the diff on your changeset is the entire file ... is this
google code do you think, or some subtlety of the way you're bridging to
svn?

Cheers,
Tim

[tshead.vcf]

---

begin:vcard
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n:Shead;Timothy
org:www.k-3d.org
email;internet:tshead@...
title:Founder
x-mozilla-html:FALSE
url:www.k-3d.org
version:2.1
end:vcard

---

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[Paulo Teotonio Sobrinho]

On Tue, 7 Jul 2009, Bart Janssens wrote:

> On Tue, Jul 7, 2009 at 2:30 AM, Timothy M. Shead<tshead@...> wrote:
>> Paulo Teotonio Sobrinho wrote:
>>> Hi
>>>
>>> I'm playing with the new python shell dialog and I must say, it is really
>>> useful! To give one example, one can interactively learn the python
>>> interface much faster than any other way, specially people like me that
>>> are not experienced programmers.
>>
>> Glad to hear it!
>>
>>> I have some questions regarding the python shell
>>>
>>> 1) K3d 0.7.11.0 does not have really usable shell. On the other hand
>>> 0.7.12.0 has a nice python shell but the mesh module will be off for some
>>> time. I would like to have both. How can I build 0.7.11.0 but with the
>>> newest python shell? I tried to copy ngui_python_shell/dialog.cpp over the
>>> old one, but it did not work.
>>
>> Hopefully the mesh module won't be off for long :)  In the meantime,
>> multiple files changed to implement the Python shell.  If you want to
>> backport it, you'll have to use svn to look at the history and see
>> everything that changed.  This is technically feasible, but you'll have
>> to do the homework.
>>
>>> 2) It seems that line editing in 0.7.12.0 python shell is not working. For
>>> example, I am able to move the cursor to any point on a line of text, but
>>> I can not erase or insert any character.
>>
>> This is by-design - the Python shell works like any other - once you
>> enter a command with the "return" key, it becomes part of the shell
>> history.  Editing it after the fact wouldn't make any sense, since the
>> command has already been executed by the Python interpreter.  You seem
>> to want some kind of hybrid between a text editor and an interactive
>> interpreter.  I'm open to the idea, but I've never seen such a thing.
>> Got an example?
>
> I think this really was a bug: moving somewhere in the middle of a
> non-submitted line of code did not allow editing. I fixed this in my
> branch, see changeset:
> http://code.google.com/p/k3d-bart/source/detail?r=9c859a8ea62a22817ea44f236fcf150ee0dce7c9
>
> Cheers,
>
> --
> Bart
>

Hi

I used used your code and now non-submitted lines can be edited nicely.

Thanks!

Paulo
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[bART Janssens-2]

On Wed, Jul 8, 2009 at 4:31 AM, Timothy M. Shead<tshead@...> wrote:
> I notice that the diff on your changeset is the entire file ... is this
> google code do you think, or some subtlety of the way you're bridging to
> svn?

This is a bug in Google Code, see
http://code.google.com/p/support/issues/detail?id=2521

Cheers,

--
Bart

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[bART Janssens-2]

On Tue, Jul 7, 2009 at 2:30 AM, Timothy M. Shead<tshead@...> wrote:
> Hopefully the mesh module won't be off for long :)  In the meantime,
> multiple files changed to implement the Python shell.  If you want to
> backport it, you'll have to use svn to look at the history and see
> everything that changed.  This is technically feasible, but you'll have
> to do the homework.

The last two modules have been converted, at the tip of
http://code.google.com/p/k3d-bart/source/list

Cheers,

--
Bart

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