[pyngl-talk] Importing PyNIO from a conda install

[David Brown]

I have found the problem with the HREF data and will be checking in a
fix soon. I will try to make a new "beta" version and put it in the
"dbrown" channel. I can't promise exactly when, but hopefully within a
week or two.
I will take a look at the wavewatch data now.
 -dave


On Wed, Mar 16, 2016 at 3:51 PM, Ray Hawthorne <frontogenesis at gmail.com> wrote:
> Hi Dave,
>
> Yes, I downloaded from the ncar channel (version 1.4.3).
>
> The library is very good overall and works on most grib2 files.  The only
> two model data files (that I’ve tried anyway) that do not play nicely are:
> HREF (High Resolution Ensemble Forecast) -
> http://nomads.ncep.noaa.gov/pub/data/nccf/com/hiresw/prod/
> Wavewatch - http://nomads.ncep.noaa.gov/pub/data/nccf/com/wave/prod/  (the
> multi_1 data, specifically)
>
> Several others I’ve used (RAP, GFS, SREF) work great.  The Wavewatch model
> data can pulled in as netcdf through the opendap server, and I’m able to
> plot that through the netcdf4 library.  However, the HREF is only available
> via grib2, so I’m a little out of luck on that one.
>
> Just thought I’d pass along.
>
> Thanks again for the help and for this nice tool,
>
> Ray
>
>
> On Mar 16, 2016, at 2:13 PM, David Brown <dbrown at ucar.edu> wrote:
>
> Hi Ray,
> We were aware of the krb5 problem, but so far we have only updated the
> code to handle it for the beta version of PyNIO in the 'dbrown'
> channel. We will update the 'ncar' channel with the 1.4.3 version of
> PyNIO today. Is that the version that you installed?
> As for the GRIB2 file, PyNIO does support GRIB2 probability data in
> general, but apparently there is some feature of these particular
> files that it does not yet handle. We will investigate. Thanks for the
> report.
> -dave
>
>
>
> On Tue, Mar 15, 2016 at 8:33 AM, Ray Hawthorne <frontogenesis at gmail.com>
> wrote:
>
> Natalie’s suggestion appears to be the smoking gun.  I’m able to import Nio
> now, and was able to open up a RAP GRIB2 file downloaded from NOMADS.
>
> The original file I was attempting to open is throwing me an error and
> aborting.  I’m not sure if pynio supports probability files, so I’ll take a
> closer look at that portion of the pynio documentation later on.
>
> import Nio
> f = Nio.open_file("href.t06z.prob.f36.grib2")
>
> Abort trap: 6
>
> Thank you for the help,
>
> Ray
>
>
>
>
> On Mar 15, 2016, at 8:16 AM, Tourville,Natalie
> <Natalie.Tourville at colostate.edu> wrote:
>
> Hi Ray,
>
> We recently ran into this error and installing krb5 fixed the issue.  It’s
> looking for the libgssapi_krb5.2.2.dylib library (found in the krb5
> package).
>
> conda install krb5
>
> And then reinstall PyNio.
>
> Regards,
> -Natalie Tourville
>
>
> On Mar 15, 2016, at 6:49 AM, Kyle Griffin <ksgriffin2 at wisc.edu> wrote:
>
> Ray,
>
> If you import a module with a certain name, you must reference its functions
> with that name as well. Since 'import Nio' is how the module was intended to
> be imported, the instructions are to use that. Since you've imported PyNIO,
> you would have to use 'PyNIO.open_file(....)' to use things from the PyNIO
> module. Alternatively, you can do 'import PyNIO as Nio' to create an alias
> with which you can refer to the module - this would allow your
> 'Nio.open_file(...)' statements to work as you've written them.
>
>
> Kyle
>
> On Tue, Mar 15, 2016 at 7:06 AM Ray Hawthorne <frontogenesis at gmail.com>
> wrote:
> Good morning Dave,
>
> Unfortunately, that does not work.
>
> Here’s what I get back when importing Nio:
>
> import Nio
>
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File
> "/Users/frontogenesis/anaconda2/lib/python2.7/site-packages/PyNIO/Nio.py",
> line 63, in <module>
>   from nio import *
> ImportError:
> dlopen(/Users/frontogenesis/anaconda2/lib/python2.7/site-packages/PyNIO/nio.so,
> 2): Library not loaded: @rpath/libgssapi_krb5.2.2.dylib
> Referenced from:
> /Users/frontogenesis/anaconda2/lib/python2.7/site-packages/PyNIO/nio.so
> Reason: image not found
>
>
> Here’s what I get when importing PyNIO (success), but try to open the file
> (not successful):
>
> import PyNIO
> f = Nio.open_file("href.t06z.prob.f36.grib2")
>
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> NameError: name 'Nio' is not defined
>
> -Ray
>
> On Mar 14, 2016, at 11:19 PM, David Brown <dbrown at ucar.edu> wrote:
>
> The standard way to import PyNIO is simply:
>
> import Nio
>
> f = Nio.open_file(<filename>)
>
> Let us know if that doesn't work.
> -dave
>
>
>
>
>
> On Mon, Mar 14, 2016 at 9:10 PM, Ray Hawthorne <frontogenesis at gmail.com>
> wrote:
>
> Greetings,
>
> I just installed PyNIO from anaconda and I’m having some trouble reading in
> a grib2 file.
>
> Using the documentation, when I do an import into my Python script:
> import Nio
>
> The import fails to occur.
>
> I dug around in the anaconda subdirectories and tried:
> import PyNIO
> And that import statement works just fine.
>
> However, when I go to open a grib file:
> f = Nio.open_file("href.t06z.prob.f36.grib2”)
> I end up getting a traceback.
>
> (Similar issue with importing PyNio.Nio as Nio)
>
> I suspect there’s a discrepancy between the documentation and the build of
> PyNIO from anaconda — but I’m somewhere in the advanced beginner stage when
> it comes to Python in general, so I’m not sure how I might be able to fix
> this so that I can open the grib file with pynio.  Would someone be able to
> point me in the right direction?
>
> Thanks,
>
> Ray Hawthorne
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