Re: [Pydev-code] changing python interpreter and project's python path programmatically

[Fabio Z. <fa...@es...>]

On Mon, May 14, 2012 at 7:41 PM, Josh Stratton <str...@gm...> wrote:
> After digging around with the pydev code I've been trying to write a
> simple eclipse plugin that can change the active python interpreter or
> alter the current project's python path programmatically.  For
> example, if I call PythonInterpreterManager.createInterpreterInfo(), I
> get the popup asking for which system libs to include on the path.
> With the info I get back, I can call addInterpreterInfo() to store it
> in the manager.  What I don't understand though is what happens with
> this stored data.  For example, if I call
> PythonInterpreterManager.getInterpreterInfos(), I don't get that new
> info I just added back.  Looking at the code, it seems to be doing
> something more complex than just pulling from a list.  I also don't
> see anything outside the preferences as to which interpreter is
> actually being used.  Is it the selected one?  Is there a way to query
> this without actually looking at the IPreferencePage?  Because we have
> several diferrent interpreters, I'd like to write a view plugin that
> can add/switch-between the various interpreters without having to open
> up the preferences window.  However, it seems that the preferences are
> intimately tied to the actual data, so I have to actually look at
> preferences pages instead of some function on a manager like
> getActiveInterpreter() or setActiveInterpreter().
>
> In a related vein, I'd like to be able to alter the pythonpath for a
> given project I'm working on.  For example, I might add a checkbox to
> my view and when it's toggled, it adds/removes some path from the
> project's python path.
>
> I was expecting some functions like addInterpreterPath() on some
> manager that adds that path to the interpreters preferences page.  Or
> getProjectPythonPath(IProject) or setProjectPythonPath(IProject,
> String) that could change the project's python path without dealing
> with the actual preference pages.  Just from my limited understanding
> of the code, however, a lot of the "model" state is actually in the UI
> itself instead of just in the managers.
>
> Is this functionality currently possible with the existing API without
> having to jump through a bunch of hoops?
>
> Thanks, Josh
>


Not sure if it was you, but see:
http://stackoverflow.com/questions/10587681/adding-python-interpreters-programmatically

As for the project, you should do:

nature = PythonNature.getPythonNature(IProject)
pythonPath = nature.getPythonPathNature()
pythonPath.setProjectSourcePath("/project/path1|/project/path2")

You can look at those (IPythonNature and IPythonPathNature for more
APIs for dealing with the project).

Cheers,

Fabio