ImportError with Python 3.10

[prjemian]

As noted in https://github.com/BCDA-APS/apstools/pull/620#issuecomment-1014746302, the ImportError: cannot import name 'Iterable' from 'collections' error happens with Py3.10:

conda create -n py310 python=3.10
conda env update -f environment.yml -n py310
conda activate py310
python
import databroker

Expected Behavior

No exception should be raised due to import databroker.

Current Behavior

see the comment referenced above

Possible Solution

Could this be a problem upstream with the intake package?

Steps to Reproduce (for bugs)

see the comment referenced above

Context

Unit tests of apstools fail when using Python 3.10

Your Environment

Linux

[tacaswell]

This was fixed in pims in https://github.com/soft-matter/pims/pull/383 but I do not think we have done a release over there in a while.

[prjemian]

Might be a good idea. Warnings such as this one have been raised by pims for some time:

2022-01-17T20:51:37.1162836Z /opt/conda/conda-bld/apstools_1642452057613/_test_env_placehold_..._placehold/lib/python3.9/site-packages/pims/image_reader.py:26: RuntimeWarning: PIMS image_reader.py could not find scikit-image. Falling back to matplotlib's imread(), which uses floats instead of integers. This may break your scripts. 
2022-01-17T20:51:37.1164164Z (To ignore this warning, include the line "warnings.simplefilter("ignore", RuntimeWarning)" in your script.)
2022-01-17T20:51:37.1164607Z   warnings.warn(RuntimeWarning(ski_preferred))

Not sure how to control that in apstools other than heed the directiions of ignore this warning (apstools does not call pims directly).