[pyngl-talk] Unable to import ngl

Zilore Mumba zmumba at gmail.com
Thu May 9 04:45:17 MDT 2019

Thanks very much for your info and hints. When I was buying the laptop I
asked for a 64-bit but the vendor gave me a 32-bit with 64-bit Windows
operaing system installed. I tried 64-bit Anaconda3-2019.03-Linux-x86_64.sh
but then python-3.7.3 builds fails.
I will try the suggestion you gave.Thanks very much.

On Wed, May 8, 2019 at 10:00 PM Kevin Hallock <hallock at ucar.edu> wrote:

> Hi Zilore,
> If your laptop is a 32-bit system, then unfortunately I don’t think that
> the 64-bit anaconda3 or any of the pre-existing conda packages will work on
> your computer. It is generally possible to run 32-bit binaries on a 64-bit
> system, but not 64-bit binaries on 32-bit systems.
> It is theoretically possible to build PyNGL and PyNIO on a 32-bit system,
> but because PyNGL requires NCL to be built as well, this process would
> likely be rather complicated and time consuming. You might be able to hack
> together a solution using the
> “ncl_ncarg-6.6.2-Debian7.11_32bit_gnu472.tar.gz” download of NCL on this
> page: https://www.earthsystemgrid.org/dataset/ncl.662.dap/file.html
> I tried to mimic the build environment used by the conda-forge PyNGL
> package (https://github.com/conda-forge/pyngl-feedstock/tree/master/recipe
> dependency packages in meta.yaml, build commands in build.sh), but ran into
> issues and am unable to spend more time working on it right now. Hopefully
> this info is enough to get you on the right track, but feel free to ask for
> advice if you hit any roadblocks.
> I hope this helps,
> Kevin
> On May 8, 2019, at 12:00 AM, Zilore Mumba <zmumba at gmail.com> wrote:
> Kevin,
> Thanks very much for the hints you gave me. I would like to run my scripts
> on a laptop which is 32 bit. I notice that both Nio.py and Ngl.py are in
> $HOME/anaconda3/lib/site-packages. I have added this to my LD_LIBRARY_PATH,
> but still the same problem. So looks like it is an architecture problem as
> you point out.
> I am thinking of installing 64-bit anaconda3 on top of 32-bit. Before I do
> that, would you advise that, or I have to install the current installation
> first?
> Thanks for your time
> On Wed, May 8, 2019 at 12:09 AM Kevin Hallock <hallock at ucar.edu> wrote:
>> Hi Zilore,
>> I think the “PackagesNotFoundError” from conda is due to the fact that
>> you are running a 32-bit Linux OS, while the conda packages are explicitly
>> 64-bit binaries. Would it be possible to use a 64-bit Linux virtual machine
>> instead?
>> When you installed PyNGL from source, were there any particular warning
>> or error messages? Did you use conda to install the necessary dependencies,
>> or did you use packages installed via apt-get?
>> Thanks,
>> Kevin
>> On May 7, 2019, at 3:31 PM, Zilore Mumba via pyngl-talk <
>> pyngl-talk at ucar.edu> wrote:
>> Hello, <pyngl-talk at ucar.edu>
>> I am trying to run python scripts for plotting data, from the ncl to
>> python transition manual. The scripts call nio and ngl.
>> I have installed anaconda3 and created an ncl_to_python environment as
>> follows:
>> conda create -n yourenvname python=x.x anaconda
>> conda activate ncl_to_python
>> Then following here http://mailman.ucar.edu/pipermail/pyngl-talk/2019-February/000276.html
>> I did:
>> conda update -c conda-forge —all
>> python -c "import Nio; print(Nio.__version__)"
>> the last command was giving me "no module NIO" as in the pyngl-talk post above. I have followed  subsequent post and managed to install pynio with:
>> conda install gdal; conda update --all
>> When I run the script I get:
>> Traceback (most recent call last):
>>   File "TRANS_contour_lines_on_map.py", line 41, in <module>
>>     import Ngl
>> ModuleNotFoundError: No module named 'Ngl'
>> I have installed pyngl from source, but it does not seem to be seen. With
>> conda install -c conda-forge pyngl
>>   or
>> conda install -c conda-forge/label/cf201901 pyngl
>> I get:
>> PackagesNotFoundError: The following packages are not available from current channels:
>>   - pyngl
>> I am working on ubuntu 18.04 32 bit on VMware as a guest on Windows 10.
>> Assistance will be appreciated.
>> Zilore Mumba
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