Python 3.10 - Schematics finally broke

[ahopkins]

Schematics has been ignoring this:

$ python
Python 3.9.7 (default, Aug 31 2021, 13:28:12) 
[GCC 11.1.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from collections import Iterable
<stdin>:1: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.10 it will stop working

With the release of Python 3.10, it is finally broken:

$ python                
Python 3.10.0rc2 (default, Oct  4 2021, 11:48:47) [GCC 11.1.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from collections import Iterable
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'Iterable' from 'collections' (/usr/local/lib/python3.10/collections/__init__.py)

[kjaquier]

On Python 3.10:

Python 3.10.0 (default, Oct 13 2021, 08:45:17) [GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import schematics
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/root/.cache/pypoetry/virtualenvs/poetry-demo-il7asoJj-py3.10/lib/python3.10/site-packages/schematics/__init__.py", line 5, in <module>
    from .models import Model, ModelMeta
  File "/root/.cache/pypoetry/virtualenvs/poetry-demo-il7asoJj-py3.10/lib/python3.10/site-packages/schematics/models.py", line 11, in <module>
    from .datastructures import OrderedDict, Context
  File "/root/.cache/pypoetry/virtualenvs/poetry-demo-il7asoJj-py3.10/lib/python3.10/site-packages/schematics/datastructures.py", line 6, in <module>
    from collections import MutableMapping, KeysView, ValuesView, ItemsView
ImportError: cannot import name 'MutableMapping' from 'collections' (/usr/local/lib/python3.10/collections/__init__.py)

[heuripedes]

Ubuntu LTS 22.04 will ship with Python 3.10 in April 2022. Every user of the library would appreciate if someone could merge or adapt PR #595 to solve this issue. Meanwhile the solution is to move on to something else or maintain a fork that doesn't have the problem.

[lucaspolo]

Hello, is this project still maintained? If not, is there a fork or a good alternative?

[ahopkins]

Hello, is this project still maintained? If not, is there a fork or a good alternative?

Seems 🪦 to me. I'd suggest migrating to another modelling lib. I am not aware of an alternative offering the same API as this. Maybe try attrs, marshmallow, or pydantic. All of those are very well supported and maintained.