AttributeError: module 'collections' has no attribute 'MutableMapping'

[richstokes]

/Users/rich/Library/Python/3.11/bin/cohen3
Traceback (most recent call last):
  File "/Users/rich/Library/Python/3.11/bin/cohen3", line 5, in <module>
    from coherence.cli import main
  File "/Users/rich/Library/Python/3.11/lib/python/site-packages/coherence/cli.py", line 27, in <module>
    from coherence.base import Coherence, Plugins
  File "/Users/rich/Library/Python/3.11/lib/python/site-packages/coherence/base.py", line 62, in <module>
    from eventdispatcher import (
  File "/Users/rich/Library/Python/3.11/lib/python/site-packages/eventdispatcher/__init__.py", line 5, in <module>
    from .dictproperty import DictProperty, ObservableDict
  File "/Users/rich/Library/Python/3.11/lib/python/site-packages/eventdispatcher/dictproperty.py", line 13, in <module>
    class ObservableDict(collections.MutableMapping):
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'collections' has no attribute 'MutableMapping'

[opacam]

Thank you for bringing this issue to our attention!

I wanted to let you know that I'm fully aware of this error. It occurs in Python versions greater than 3.9 due to a change in the attribute MutableMapping from the collections module, which has been moved to collections.abc in Python 3.10. It's important to note that our dependency, eventdispatcher, is one of the triggers for this error. However, it's not the only one. The testing framework we use, nose, also relies on MutableMapping.

To address this, I've taken the initiative of fixing the problem by creating a fork of eventdispatcher (eventdospatcher3) where this issue has been resolved. Additionally, we're planning to eliminate our dependency on nose since it's no longer actively maintained. I've already started the process by initiating Pull Request (#66) to tackle these changes. However, please be aware that resolving this issue may take some time.

Once again, I appreciate your patience and understanding. We're actively working towards resolving this error and making the necessary adjustments to ensure smooth functionality in Python versions beyond 3.9. If you have any further questions or concerns, please don't hesitate to let me know.