[IPython-dev] embedding ipython, namespace question

[Darren Dale]

On Sat Jan 03 2015 at 10:45:42 AM Darren Dale <dsdale24 at gmail.com> wrote:

> Hi Ray,
>
> On Sat Dec 27 2014 at 8:48:20 PM Osborn, Raymond <rosborn at anl.gov> wrote:
>
>>  I don’t really understand what you are trying to achieve, but the
>> ‘user_ns’ dictionary isn’t an isolated namespace - it’s the namespace that
>> is used by the console, and I would have thought you would have to do some
>> kind of injection to add other objects from within the application.
>>
>
> What I am trying to achieve is explicitly documented at
> http://ipython.org/ipython-doc/dev/interactive/reference.html#embedding-ipython
> :
>
> ---
>  It is also possible to embed an IPython shell in a namespace in your
> Python code. This allows you to evaluate dynamically the state of your
> code, operate with your variables, analyze them, etc. Note however that any
> changes you make to values while in the shell do not propagate back to the
> running code, so it is safe to modify your values because you won’t break
> your code in bizarre ways by doing so.
>
> Note
> At present, embedding IPython cannot be done from inside IPython. Run the
> code samples below outside IPython.
> [DD: I am not attempting to embed ipython from inside ipython]
>
> This feature allows you to easily have a fully functional python
> environment for doing object introspection anywhere in your code with a
> simple function call. In some cases a simple print statement is enough, but
> if you need to do more detailed analysis of a code fragment this feature
> can be very valuable.
>
> It can also be useful in scientific computing situations where it is
> common to need to do some automatic, computationally intensive part and
> then stop to look at data, plots, etc. Opening an IPython instance will
> give you full access to your data and functions, and you can resume program
> execution once you are done with the interactive part (perhaps to stop
> again later, as many times as needed).
> The following code snippet is the bare minimum you need to include in your
> Python programs for this to work (detailed examples follow later):
>
>    from IPython import embed
>    embed() # this call anywhere in your program will start IPython
>
> You can also embed an IPython kernel, for use with qtconsole, etc. via
> IPython.embed_kernel(). This should function work the same way, but you can
> connect an external frontend (ipython qtconsole or ipython console), rather
> than interacting with it in the terminal.
> ---
>
> This is impressively simple for the embed function:
>
> ---
> C:\Users\darren> python
> Python 2.7.8 |Continuum Analytics, Inc.| (default, Jul  2 2014, 15:12:11)
> [MSC v.1500 64 bit (AMD64)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
> Anaconda is brought to you by Continuum Analytics.
> Please check out: http://continuum.io/thanks and https://binstar.org
> >>> from IPython import embed
> >>> a=1
> >>> embed()
> Python 2.7.8 |Continuum Analytics, Inc.| (default, Jul  2 2014, 15:12:11)
> [MSC v.1500 64 bit (AMD64)]
> Type "copyright", "credits" or "license" for more information.
>
> IPython 2.3.1 -- An enhanced Interactive Python.
> Anaconda is brought to you by Continuum Analytics.
> Please check out: http://continuum.io/thanks and https://binstar.org
> ?         -> Introduction and overview of IPython's features.
> %quickref -> Quick reference.
> help      -> Python's own help system.
> object?   -> Details about 'object', use 'object??' for extra details.
>
> In [1]: a
> Out[1]: 1
> ---
>
> But I have not been able to achieve the same behavior with the qt
> in-process console.
>

If this is not possible, perhaps the documentation should be changed?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/ipython-dev/attachments/20150109/6b5208e5/attachment.html>