ImportError when attempting to test with Python 3.14

[befeleme]

Trying to run the tests with Python 3.14, I run into ImportError. This is new, doesn't happen with Python 3.13.
I test with Python 3.14, because I prepare an update of the main Python in Fedora Linux 43 and try to rebuild all Python packages as such.

$ tox -e py314
py314: commands[0]> pytest --cov=lz4/block --cov=lz4/frame --tb=long tests/block tests/frame
ImportError while loading conftest '/home/ksurma/dev/python-lz4/tests/frame/conftest.py'.
tests/frame/conftest.py:2: in <module>
    import lz4.frame as lz4frame
lz4/frame/__init__.py:30: in <module>
    from . import _compression
E   ImportError: cannot import name '_compression' from partially initialized module 'lz4.frame' (most likely due to a circular import) (/home/ksurma/dev/python-lz4/lz4/frame/__init__.py)

Or just on an installed project in Python 3.14 venv:

$ python                      
>>> import lz4.frame as lz4frame
Traceback (most recent call last):
  File "/home/ksurma/dev/python-lz4/lz4/frame/__init__.py", line 28, in <module>
    import _compression   # Python 3.6 and later
    ^^^^^^^^^^^^^^^^^^^
ModuleNotFoundError: No module named '_compression'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<python-input-0>", line 1, in <module>
    import lz4.frame as lz4frame
  File "/home/ksurma/dev/python-lz4/lz4/frame/__init__.py", line 30, in <module>
    from . import _compression
ImportError: cannot import name '_compression' from partially initialized module 'lz4.frame' (most likely due to a circular import) (/home/ksurma/dev/python-lz4/lz4/frame/__init__.py)

[hroncok]

From https://peps.python.org/pep-0784/

The _compression module, given that it is marked private, will be immediately renamed to compression._common._streams.

Here:

python-lz4/lz4/frame/__init__.py

Lines 27 to 30 in 022d538

	try:
	import _compression # Python 3.6 and later
	except ImportError:
	from . import _compression

It goes to the second import (which is likely broken, as it was not used since Python 3.5?).

[hroncok]

import compression._common._streams as _compression

should do on Python 3.14+

[hroncok]

Considering

python-lz4/setup.py

Line 174 in 022d538

python_requires=">=3.9",

The from . import _compression fallback is likely not needed.