[Nexus] Status of Python related issues

[Osborn, Raymond]

I’m sorry if this debate is causing any concern. The python port of NAPI has been stable for many years, and as along as the call signatures to the C-API don’t change, then there is no problem keeping it in the distribution. I think the only issue we encountered before is whether it was looking in enough places for the NeXus library, but I think that was solved. I don’t mind helping out if people post issues to the new python-nxs github page. Personally, I would like tree.py deprecated, unless people are prepared to let me replace it with the h5py-only version we are developing as part of NeXpy.

We have even discussed making a port to h5py, although that is a bit more work because NAPI uses a state model, which is not so natural for python. So I believe that consensus is to keep napi.py, with minimal modifications, and your email confirms that. I don’t know if that needs further action by NIAC, i.e., to reassert the status quo.

Ray

On Dec 2, 2015, at 1:41 AM, Carlos Pascual <cpascual at cells.es<mailto:cpascual at cells.es>> wrote:

Our scan recorder is based on the napi, and it is a critical component
for our sytem. Also some other minor utilities.

I think it would no be too much work for us to migrate these t the tree
API or even use h5py directly, but I would appreciate if an official
statement is done ASAP regarding the napi.py in order to allocate time
for the migration before I find that an update of NeXus breaks our data
collection.


On Mon 30 November 2015 15:36:39 Osborn, Raymond wrote:
I see that some, if not all, of the Python issues were raised by me. I
presume the issue dates are actually the transfer dates and bear no
relation to the actual issues, which are probably lost in the mists
of time. I haven’t worked on the Python bindings in the official
NeXus repository for years, and have no idea of their status and
don’t really have time to go back over them again.

Is anyone else using these bindings? They are available in an
HDF5-only version in the nexusformat Github at
https://github.com/nexpy/nexusformat. The original napi.py was
removed there because the tree API doesn’t need it any more, although
we did discuss briefly at the code-camp telco resurrecting it using
h5py calls. That could be done within the nexpy Github, if someone
wants to work on it. I even created a ‘napi’ branch for this purpose
a couple of weeks ago.

Ray

On Nov 30, 2015, at 7:34 AM, Eugen Wintersberger
<eugen.wintersberger at desy.de<mailto:eugen.wintersberger at desy.de><mailto:eugen.wintersberger at desy.de>>
wrote:

Hi Stuart,

On 11/30/15 14:30, Stuart Campbell wrote:
Hi,
They only appear to be opened by me as I did the ticket migration. The
real 'requester' is in the first line of the body.
Cheers
Stu\

Sorry for blaming you being responsible for all the Python related
tickets ;). Did not recognize the first line with the original issuer.

regards
Eugen


On 11/30/2015 08:17 AM, Eugen Wintersberger wrote:
Hi folks,
 I am currently working on the release for the NAPI Python wrapper.
As you may have recognized, the Python code has moved to its own
repository (python-nxs). There are several Python related issues
concerning the Python bindings listed in NAPIs issues tracker which I
would like to move to the new python-nxs repository.
However, I am not sure about the status of theses issues (most of them
opend by Stuart).
Can anyone please confirm whether or not these issues are still open

https://github.com/nexusformat/code/issues/324
https://github.com/nexusformat/code/issues/322
https://github.com/nexusformat/code/issues/182
https://github.com/nexusformat/code/issues/162
https://github.com/nexusformat/code/issues/156

If theses issues are still open we should try to fix them in the 4.4.0
release for the Python bindings.

regards
 Eugen


--
Ray Osborn, Senior Scientist
Materials Science Division
Argonne National Laboratory
Argonne, IL 60439, USA
Phone: +1 (630) 252-9011
Email: ROsborn at anl.gov<mailto:ROsborn at anl.gov><mailto:ROsborn at anl.gov>

--
+----------------------------------------------------+
Carlos Pascual Izarra
Scientific Software Coordinator
Computing Division
ALBA Synchrotron  [http://www.albasynchrotron.es<http://www.albasynchrotron.es/>]
Carrer de la Llum 2-26
E-08290 Cerdanyola del Valles (Barcelona), Spain
E-mail: cpascual at cells.es<mailto:cpascual at cells.es>
Phone: +34 93 592 4428
+----------------------------------------------------+

--
Ray Osborn, Senior Scientist
Materials Science Division
Argonne National Laboratory
Argonne, IL 60439, USA
Phone: +1 (630) 252-9011
Email: ROsborn at anl.gov<mailto:ROsborn at anl.gov>


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