[Python.NET] homebrew pythonnet, versus pip install --pre pythonnet

Wed Jun 11 20:35:24 CEST 2014

+1 for this comment
I'm learning a lot from the source code, and the way it "just works" from cpython really is mind blowing. Kudos once again.

In case anyone here is interested I gave a lightning talk on python.NET at PyCon in Montreal in April:

http://pyvideo.org/video/2680/lightning-talks-friday-afternoon

My talk is around the 37 minute mark of the video.

Thanks to everyone who made this magic possible.

From: PythonDotNet [mailto:pythondotnet-bounces+jgill=tokiomillennium.com at python.org] On Behalf Of Adam Klein
Sent: Wednesday, June 04, 2014 6:18 PM
To: A list for users and developers of Python for .NET
Subject: Re: [Python.NET] homebrew pythonnet, versus pip install --pre pythonnet

Agreed - had no problem building in VS. I did have some problems in setup.py, that I pointed out (but only having to do with my registry keys not aligning with what the script expected).

I'm learning a lot from the source code, and the way it "just works" from cpython really is mind blowing. Kudos once again.

From: PythonDotNet [mailto:pythondotnet-bounces+aklein=bmcm.com at python.org] On Behalf Of David Anthoff
Sent: Wednesday, June 04, 2014 3:38 PM
To: 'A list for users and developers of Python for .NET'
Subject: Re: [Python.NET] homebrew pythonnet, versus pip install --pre pythonnet

Ok, actually we are talking past each other. The problem Adam had apparently has nothing to do with the migration or the pip stuff, it probably is just caused by a bug introduced in a recent commit, the code Adam identified. We should fix that once we have figured out all the details.

As far as I can tell building from VS still works, none of the changes made should cause a problem for that. If they did, we should fix them, but so far I am not aware of anything that broke building from VS.

I also want to stress that what we have on github right now is not a released version. We are slowly working towards a release. If you find bugs or regressions in the prerelease version, please help us to fix them. The best way to make sure things work in your environment is to test and help out.

From: PythonDotNet [mailto:pythondotnet-bounces+anthoff=berkeley.edu at python.org] On Behalf Of Bradley Friedman
Sent: Wednesday, June 4, 2014 11:36 AM
To: pythondotnet at python.org<mailto:pythondotnet at python.org>
Subject: Re: [Python.NET] homebrew pythonnet, versus pip install --pre pythonnet

Yes.  But the problem is: before the migration, those things DID work.  And it was the pip/setup.py that needed to be fixed up.  It sounds like you're saying you've sacrificed all of it just to get a pip install working for windows.  This is extremely troubling.  I have not looked at the git branch yet.  But now I need to investigate what exactly is going on.

On Jun 4, 2014, at 1:46 PM, David Anthoff <anthoff at berkeley.edu<mailto:anthoff at berkeley.edu>> wrote:

Pull requests to fix this are more than welcome :) I agree that building from the IDE should also work, but right now there doesn't seem to be the man power to fix all of these things.

From: PythonDotNet [mailto:pythondotnet-bounces+anthoff=berkeley.edu at python.org] On Behalf Of Brad Friedman
Sent: Wednesday, June 4, 2014 9:49 AM
To: A list for users and developers of Python for .NET
Subject: Re: [Python.NET<http://Python.NET>] homebrew pythonnet, versus pip install --pre pythonnet

Umm. As an asside:  seriously?  You are only supporting setup.py builds from this branch?  That's a problem. Python.net<http://python.net/> is also used to embed python. Therefore, it should build from IDE on all platforms and also from an autotools system.

On Jun 4, 2014, at 6:15 AM, Tony Roberts <tony at pyxll.com<mailto:tony at pyxll.com>> wrote:
Hi Adam,

that 2.0.0.beta1 build was built from the source on github here:
https://github.com/pythonnet/pythonnet

You should build it using the setup.py script and not in the IDE.

There are CI builds setup for both windows and linux (see README.md) if you want to see exactly how the wheel gets built.

Best regards,
Tony

On Wed, Jun 4, 2014 at 3:48 AM, Bradley Friedman <brad at fie.us<mailto:brad at fie.us>> wrote:
Can you provide the contents of the ".Config" file that is built with your particular build solution?  There's a pretty good chance that the "FileNotFound" is actually mono trying to link back to Python shared libraries.  Though to be honest, debugging is going to be your best bet here.  You might try building in Xamarin or MonoDevelop on the mac, to be able to debug more easily.

-brad

On Jun 3, 2014, at 7:15 PM, Tribble, Brett <btribble at ea.com<mailto:btribble at ea.com>> wrote:

It has been a while since I've had to deal with this, but make sure that your assembly is in the system path and/or pythonpath if it is not registered in the GAC.

From: PythonDotNet [mailto:pythondotnet-bounces+btribble=ea.com at python.org] On Behalf Of Adam Klein
Sent: Tuesday, June 03, 2014 4:02 PM
To: pythondotnet at python.org<mailto:pythondotnet at python.org>
Subject: [Python.NET<http://python.net/>] homebrew pythonnet, versus pip install --pre pythonnet

Hi All,

Amazing library, first of all!

I am experimenting with integrating ipython / numpy / pandas for interactive data analysis with our large existing C# codebase. We are using the Anaconda 2.0 release from ContinuumIO. With `pip install -pre pythonnet`, everything goes as expected (great!)

However, when I build from source (in VS2013), point my PYTHONPATH to the clr.pyd and Python.Runtime.dll that results from the build, and run my ipython, I can do `import clr` and `ref = clr.AddReference("assemblyname")`, but I cannot load any modules within this assembly. I get a `ImportError: No module named ...` Furthermore, if I try to do ref.ExportedTypes, I get a `FileNotFoundException: Could not load file or assembly ...` where it cannot find an assembly that is referenced by the original assembly. There must be some broken loading going on... Any thoughts why this might have different behavior than what I install via PyPI (https://pypi.python.org/pypi/pythonnet/2.0.0.dev1)? Or, hints on how to debug?

Thanks!!!

--Adam

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