python-lazyarray fails to build with Python 3.10.0a5.

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ERROR: test_ufunc.test_cos_from_generator
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Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/builddir/build/BUILD/lazyarray-0.3.4/test/test_ufunc.py", line 40, in test_cos_from_generator
    A = larray(clock(), shape=(2, 2))
  File "/builddir/build/BUILD/lazyarray-0.3.4/lazyarray.py", line 191, in __init__
    elif isinstance(value, collections.Sized):  # False for numbers, generators, functions, iterators
AttributeError: module 'collections' has no attribute 'Sized'

----------------------------------------------------------------------
Ran 91 tests in 0.145s

FAILED (errors=88)

The deprecated aliases to Collections Abstract Base Classes were removed from the collections module.
https://docs.python.org/3.10/whatsnew/changelog.html#python-3-10-0-alpha-5
https://bugs.python.org/issue37324

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.10/fedora-rawhide-x86_64/01954791-python-lazyarray/

For all our attempts to build python-lazyarray with Python 3.10, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/package/python-lazyarray/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.10:
https://copr.fedorainfracloud.org/coprs/g/python/python3.10/

Let us know here if you have any questions.

Python 3.10 will be included in Fedora 35. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.10.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.