[Bug]: Can't import xcdat after updating from 0.3.0 to 0.5.0 (module 'xarray.core' has no attribute 'resample')

[jypeter]

What happened?

I have updated xcdat using mamba the following way

(cdatm_py3) jypeter@obelix4 - ...jypeter - 45 >mamba update xcdat
[...]

Pinned packages:
  - python 3.8.*


Transaction

  Prefix: /home/share/unix_files/cdat/miniconda3_21-02/envs/cdatm_py3

  Updating specs:

   - xcdat
   - ca-certificates
   - certifi
   - openssl


  Package    Version  Build           Channel                   Size
──────────────────────────────────────────────────────────────────────
  Install:
──────────────────────────────────────────────────────────────────────

  + libxslt   1.1.33  hf705e74_1      conda-forge/linux-64     553kB
  + lxml       4.8.0  py38h0a891b7_3  conda-forge/linux-64       2MB

  Upgrade:
──────────────────────────────────────────────────────────────────────

  - openssl   1.1.1v  hd590300_0      installed
  + openssl   1.1.1w  hd590300_0      conda-forge/linux-64       2MB
  - xcdat      0.3.0  pyhd8ed1ab_0    installed
  + xcdat      0.5.0  pyhd8ed1ab_0    conda-forge/noarch        61kB

  Summary:

  Install: 2 packages
  Upgrade: 2 packages

  Total download: 4MB

──────────────────────────────────────────────────────────────────────

Confirm changes: [Y/n] Y
lxml                                                 1.5MB @   4.9MB/s  0.3s
libxslt                                            553.1kB @   1.7MB/s  0.3s
openssl                                              2.0MB @   5.7MB/s  0.4s
xcdat                                               61.0kB @ 128.9kB/s  0.5s
Preparing transaction: done
Verifying transaction: done
Executing transaction: done

Afterwards, I can't import xcdat anymore

(cdatm_py3) jypeter@obelix4 - ...jypeter - 46 >python
Python 3.8.8 | packaged by conda-forge | (default, Feb 20 2021, 16:22:27)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import xcdat
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/share/unix_files/cdat/miniconda3_21-02/envs/cdatm_py3/lib/python3.8/site-packages/xcdat/__init__.py", line 2, in <module>
    from xcdat.axis import (  # noqa: F401
  File "/home/share/unix_files/cdat/miniconda3_21-02/envs/cdatm_py3/lib/python3.8/site-packages/xcdat/axis.py", line 9, in <module>
    from cf_xarray.criteria import coordinate_criteria
  File "/home/share/unix_files/cdat/miniconda3_21-02/envs/cdatm_py3/lib/python3.8/site-packages/cf_xarray/__init__.py", line 1, in <module>
    from .accessor import CFAccessor  # noqa
  File "/home/share/unix_files/cdat/miniconda3_21-02/envs/cdatm_py3/lib/python3.8/site-packages/cf_xarray/accessor.py", line 42, in <module>
    xr.core.resample.Resample,
AttributeError: module 'xarray.core' has no attribute 'resample'

What did you expect to happen? Are there are possible answers you came across?

I expected xcdat to keep on working after the update :-)

Minimal Complete Verifiable Example (MVCE)

No response

Relevant log output

No response

Anything else we need to know?

What is the suggested way to update xcdat?
I have not found anything about that in the documentation

Environment

import xarray as xr
xr.show_versions()

INSTALLED VERSIONS

commit: None
python: 3.8.8 | packaged by conda-forge | (default, Feb 20 2021, 16:22:27)
[GCC 9.3.0]
python-bits: 64
OS: Linux
OS-release: 3.10.0-1160.83.1.el7.x86_64
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: None
LANG: en_US.UTF-8
LOCALE: ('en_US', 'UTF-8')
libhdf5: 1.10.6
libnetcdf: 4.7.4

xarray: 2022.9.0
pandas: 1.2.3
numpy: 1.21.4
scipy: 1.7.0
netCDF4: 1.5.6
pydap: None
h5netcdf: 0.13.1
h5py: 2.10.0
Nio: None
zarr: 2.11.0
cftime: 1.6.2
nc_time_axis: 1.4.1
PseudoNetCDF: None
rasterio: None
cfgrib: 0.9.9.0
iris: 3.1.0
bottleneck: 1.3.7
dask: 2021.02.0
distributed: 2021.02.0
matplotlib: 3.3.4
cartopy: 0.18.0
seaborn: 0.11.1
numbagg: None
fsspec: 0.8.7
cupy: None
pint: 0.20.1
sparse: 0.13.0
flox: 0.7.2
numpy_groupies: 0.9.22
setuptools: 49.6.0.post20210108
pip: 22.0.4
conda: None
pytest: 6.2.4
IPython: 7.21.0
sphinx: 3.5.2

[jypeter]

I have just found #341 !

Maybe #341 should not have been closed before exploring A few things we might want to consider on our end @tomvothecoder mentioned at the end? Because we are just 1 year after the issue was reported and the issue is still occurring

xr.show_versions() does not report cf_xarray version. It appears I have an even older version (0.6.1) than the one mentioned in the original issue (0.7.0)

I have updated cf_xarray and I can import xcdat again! You may want to do something about this, even if it is likely that not many people around have an old version of xcdat and cf_xarray

(cdatm_py3) jypeter@obelix4 - ...jypeter - 48 >mamba update cf_xarray
[...]
  Package      Version  Build         Channel                Size
───────────────────────────────────────────────────────────────────
  Upgrade:
───────────────────────────────────────────────────────────────────

  - cf_xarray    0.6.1  pyh6c4a22f_0  installed
  + cf_xarray    0.8.4  pyhd8ed1ab_0  conda-forge/noarch     53kB

  Summary:

  Upgrade: 1 packages

  Total download: 53kB

───────────────────────────────────────────────────────────────────

Confirm changes: [Y/n] Y
cf_xarray                                           53.3kB @ 325.9kB/s  0.2s
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
(cdatm_py3) jypeter@obelix4 - ...jypeter - 49 >python
Python 3.8.8 | packaged by conda-forge | (default, Feb 20 2021, 16:22:27)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import xcdat
>>>

[tomvothecoder]

Thanks @jypeter! I accidentally closed the issue by linking it to a PR merge and forgot to go back and open an issue to constrain cf_xarray.

I'll patch the v0.5.0 release to ensure this doesn't happen.

[tomvothecoder]

I accidentally closed the issue by linking it to a PR merge and forgot to go back and open an issue to constrain cf_xarray.

Actually the user who opened the issue closed the issue and I forgot to go back to it :(

[tomvothecoder]

I opened up an issue in the cf-xarray repo so they can possibly address it on their end.

In an hour or so, there will be a new version of v0.5.0 on conda-forge that includes this patch from this PR.

python: 3.8.8 | packaged by conda-forge | (default, Feb 20 2021, 16:22:27)

I also suggest you update your environments to at least python >=3.10. Python 3.8 is approaching end-of-life (https://devguide.python.org/versions/).