Thanks for this. It's working perfectly now. Funnily enough threading was the next thing on the list, so the (non-console) scripts run in a separate thread, allowing them to be stopped by the UI. You don't happen to know if PyErr_SetString is thread safe, to "break" the currently running script?

I'll have to think about whether taking care of separate threads redirecting sys.stdout is important - I'm not sure that it is in our environment.

Cheers, Dave.

On Tue, Jun 15, 2010 at 11:53 AM, Campbell Barton <ideasman42@gmail.com>wrote:

I should have mentioned the console I linked to is not thread safe, I asked in #python about this and apparently there are 2 ways to work around this.

• use a context manager to work out which thread is taking to the overridden stdout.
• override print() not to use sys.stdout, since the consoles "write" function can already redirect exception output.

Id like to make this thread safe but for now its not a priority for me.

From the script I linked this looks like its done entirely in python, this is because we have a py/c api so python has access to the command line and can add output to the display, rather then having C call python directly but both ways can work.

...

Thanks so much.. that looks like exactly what I want to do. Looks like you've done a fantastic job on the integration there - makes my weedy

On Fri, Jun 11, 2010 at 10:16 PM, Dave Brotherstone <davegb@pobox.com> wrote: little

...

console look very plain :)

Just need to work out why boost::python won't exec code.InteractiveConsole() now :)

Thanks again. Dave.

On Thu, Jun 10, 2010 at 9:29 PM, Campbell Barton <ideasman42@gmail.com wrote:

...

In blender 2.5 we have an interactive console with multi-line support and auto complete. Demo of using the console

http://sites.google.com/site/satishgoda/blender/learningblender25/introducti...

...

Heres the script which interfaces python and blenders generic console api, look at how it uses the 'code' module.

http://www.google.com/codesearch/p?hl=en#J_CGftyjihw/release/scripts/op/console_python.py&q=console_python&sa=N&cd=1&ct=rc

...

We do our own line editing functionality but basically you can use the code module like this import code namespace = {'__builtins__': __builtins__} code.InteractiveConsole(namespace) is_multiline = console.push(line_exec) # <--- this is the line you need to run in a loop and give user input to.

even though you mention not having a console, for the record that can be done like this... PyRun_String("__import__('code').interact()", Py_eval_input, namespace, namespace);

On Thu, Jun 10, 2010 at 8:59 PM, Dave Brotherstone <davegb@pobox.com> wrote:

...

Hi,

I hope I'm asking this in the right place... I've embedded Python in

an

...

...

application, and I'm now trying to emulate a "console" for immediate commands. I can see PyRun_InteractiveOneFlags and the variants are used to send single statements, but there doesn't seem to be any variants that take a string, only a FILE*. I'm in a windows app, so there's no console. (I actually have effectively two text boxes, one multi-line read only for stdout/stderr, and one input.), I know the prompt would be in the wrong place, but that's no biggie.

PyRun_String does almost what I want, except that it fails on multiline statements (if ... : etc).

I just wanted to check if there's an API I've missed, or, whether anyone can recommend an approach.

I think I could either: a) Emulate the console through an FILE* - not sure quite how this works in Windows, but I'm sure it's possible b) Copy what PyRun_InteractiveOneFlags() does, just replacing the PyParser_ASTFromFile with PyParser_ASTFromString. Only problem here is that I seem to need mod_ty, and not sure whether it's a good idea to use something that looks like an internal type.

Many thanks for any comments.

Dave.

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• Campbell

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• Campbell

Thanks for this. It's working perfectly now. Funnily enough threading was the next thing on the list, so the (non-console) scripts run in a separate thread, allowing them to be stopped by the UI. You don't happen to know if PyErr_SetString is thread safe, to "break" the currently running script?

I'll have to think about whether taking care of separate threads redirecting sys.stdout is important - I'm not sure that it is in our environment.

Cheers, Dave.

On Tue, Jun 15, 2010 at 11:53 AM, Campbell Barton <ideasman42@gmail.com>wrote:

I should have mentioned the console I linked to is not thread safe, I asked in #python about this and apparently there are 2 ways to work around this.

• use a context manager to work out which thread is taking to the overridden stdout.
• override print() not to use sys.stdout, since the consoles "write" function can already redirect exception output.

Id like to make this thread safe but for now its not a priority for me.

From the script I linked this looks like its done entirely in python, this is because we have a py/c api so python has access to the command line and can add output to the display, rather then having C call python directly but both ways can work.

...

Thanks so much.. that looks like exactly what I want to do. Looks like you've done a fantastic job on the integration there - makes my weedy

On Fri, Jun 11, 2010 at 10:16 PM, Dave Brotherstone <davegb@pobox.com> wrote: little

...

console look very plain :)

Just need to work out why boost::python won't exec code.InteractiveConsole() now :)

Thanks again. Dave.

On Thu, Jun 10, 2010 at 9:29 PM, Campbell Barton <ideasman42@gmail.com wrote:

...

In blender 2.5 we have an interactive console with multi-line support and auto complete. Demo of using the console

http://sites.google.com/site/satishgoda/blender/learningblender25/introducti...

...

Heres the script which interfaces python and blenders generic console api, look at how it uses the 'code' module.

http://www.google.com/codesearch/p?hl=en#J_CGftyjihw/release/scripts/op/console_python.py&q=console_python&sa=N&cd=1&ct=rc

...

We do our own line editing functionality but basically you can use the code module like this import code namespace = {'__builtins__': __builtins__} code.InteractiveConsole(namespace) is_multiline = console.push(line_exec) # <--- this is the line you need to run in a loop and give user input to.

even though you mention not having a console, for the record that can be done like this... PyRun_String("__import__('code').interact()", Py_eval_input, namespace, namespace);

On Thu, Jun 10, 2010 at 8:59 PM, Dave Brotherstone <davegb@pobox.com> wrote:

...

Hi,

I hope I'm asking this in the right place... I've embedded Python in

an

...

...

application, and I'm now trying to emulate a "console" for immediate commands. I can see PyRun_InteractiveOneFlags and the variants are used to send single statements, but there doesn't seem to be any variants that take a string, only a FILE*. I'm in a windows app, so there's no console. (I actually have effectively two text boxes, one multi-line read only for stdout/stderr, and one input.), I know the prompt would be in the wrong place, but that's no biggie.

PyRun_String does almost what I want, except that it fails on multiline statements (if ... : etc).

I just wanted to check if there's an API I've missed, or, whether anyone can recommend an approach.

I think I could either: a) Emulate the console through an FILE* - not sure quite how this works in Windows, but I'm sure it's possible b) Copy what PyRun_InteractiveOneFlags() does, just replacing the PyParser_ASTFromFile with PyParser_ASTFromString. Only problem here is that I seem to need mod_ty, and not sure whether it's a good idea to use something that looks like an internal type.

Many thanks for any comments.

Dave.

---

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--

• Campbell

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• Campbell