problem with tzdata or zoneinfo

[stonebig]

hi,

trying to get plotnine working, I fail on a 'No time zone found with key UTC'

I can't find how to resolve this , even if trying to include tzdata

environment

name: xeus-python-kernel
channels:
  - https://repo.mamba.pm/emscripten-forge
  - https://repo.mamba.pm/conda-forge
dependencies:
  - ipycanvas
  - numpy
  - matplotlib
  - seaborn
  - plotnine
  - pandas
  - statsmodels
  - scikit-learn
  - scipy
  - sqlite
  - bokeh
  - panel
  - altair
  - ipympl
  - ipyleaflet
  - ipydatagrid
  - ipycanvas
  - vega_datasets
  - plotly
  - bqplot
  - black
  - pyviz_comms
  - openpyxl
  - tzdata
  - httpx

typical code that doesn't want to work:

from zoneinfo import ZoneInfo
utc = ZoneInfo('UTC')

target code

from plotnine import ggplot, geom_point, aes, stat_smooth, facet_wrap
from plotnine.data import mtcars

(ggplot(mtcars, aes('wt', 'mpg', color='factor(gear)'))
 + geom_point()
 + stat_smooth(method='lm')
 + facet_wrap('~gear'))

[martinRenou]

Thanks for opening an issue!

My gut feeling is that empack is filtering out some data files from the tzdata module. I'll have a look into it.

[martinRenou]

This should fix it #53

[stonebig]

I duplicated today xeus-python-demo and generated from it a new demo2, but I still fail on it.
I don't know how to inquire.
it apparently fails also on latest jupyterlite/demo.

it's rather a simple test now:

from zoneinfo import ZoneInfo
utc = ZoneInfo('UTC')

[martinRenou]

It also fails that way for me with a classic JupyterLab/ipykernel/tzdata installation from conda-forge.

The issues seems to be that the tzdata from conda-forge IS NOT the tzdata we find on PyPi. The one on conda-forge is not the Python package.

In order to install the Python one, you need to install python-tzdata from conda-forge. This seems to resolve the traceback you see here with the No module named tzdata.

But there is another issue on top of this with empack and that python-tzdata, I'll push a PR.

[martinRenou]

This PR fixes it, as tested in https://github.com/martinRenou/tzdata-test (https://martinrenou.github.io/tzdata-test/lab/index.html).

I'll make another empack release with this.

[stonebig]

ok, now I'm stuck on the "normal' problem of files, but otherwise, Waaaaaaaaaaaaaaa

FileNotFoundError: [Errno 44] No such file or directory: '/tmp/xeus-python-kernel/envs/xeus-python-kernel/lib/python3.10/site-packages/plotnine/data/mtcars.csv'

[martinRenou]

FileNotFoundError: [Errno 44] No such file or directory: '/tmp/xeus-python-kernel/envs/xeus-python-kernel/lib/python3.10/site-packages/plotnine/data/mtcars.csv'

This is a very similar issue. The .csv file gets filtered out by empack. I suppose this .csv is for example purpose and does not prevent plotnine to work? IMO this kind of file should get filtered out (if we were to include example data from all packages the jupyterlite kernel would not be "lite" anymore).

If you really want this file to be included you can provide your own empack config that tells to not filter out this file. We should document this properly in jupyterlite-xeus-python.

[stonebig]

My experiment was to have a full stack pytho distro... as a stupid webapp. I didn't think about the "lite" meaning, only about the dramatic simplification it apparently allows