Support python 3.12

[brawer]

Calamari can’t be installed on python 3.12. Here’s the error log from adding 3.12 to the test matrix in .github/workflows/python-test.yml. The problem is probably with an upstream dependency, but which one, and how to get it fixed?

  python -m pip install --upgrade pip
  pip install -e ".[test]"
  shell: /usr/bin/bash -e {0}
  env:
    pythonLocation: /opt/hostedtoolcache/Python/3.12.12/x64
    PKG_CONFIG_PATH: /opt/hostedtoolcache/Python/3.12.12/x64/lib/pkgconfig
    Python_ROOT_DIR: /opt/hostedtoolcache/Python/3.12.12/x64
    Python2_ROOT_DIR: /opt/hostedtoolcache/Python/3.12.12/x64
    Python3_ROOT_DIR: /opt/hostedtoolcache/Python/3.12.12/x64
    LD_LIBRARY_PATH: /opt/hostedtoolcache/Python/3.12.12/x64/lib
Requirement already satisfied: pip in /opt/hostedtoolcache/Python/3.12.12/x64/lib/python3.12/site-packages (25.3)
Obtaining file:///home/runner/work/calamari/calamari
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Checking if build backend supports build_editable: started
  Checking if build backend supports build_editable: finished with status 'done'
  Getting requirements to build editable: started
  Getting requirements to build editable: finished with status 'done'
  Preparing editable metadata (pyproject.toml): started
  Preparing editable metadata (pyproject.toml): finished with status 'done'
Collecting edit_distance (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading edit_distance-1.0.7-py3-none-any.whl.metadata (4.9 kB)
Collecting h5py (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading h5py-3.15.1-cp312-cp312-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl.metadata (3.0 kB)
Collecting lxml (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading lxml-6.0.2-cp312-cp312-manylinux_2_26_x86_64.manylinux_2_28_x86_64.whl.metadata (3.6 kB)
Collecting python-bidi~=0.4.2 (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading python_bidi-0.4.2-py2.py3-none-any.whl.metadata (4.6 kB)
Collecting tensorflow>=2.4.0 (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading tensorflow-2.20.0-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (4.5 kB)
Collecting ocrd-fork-tfaip>=1.2.7 (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading ocrd_fork_tfaip-1.2.7-py3-none-any.whl.metadata (9.4 kB)
Collecting xlsxwriter (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading xlsxwriter-3.2.9-py3-none-any.whl.metadata (2.7 kB)
Collecting pytest (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading pytest-9.0.2-py3-none-any.whl.metadata (7.6 kB)
Collecting pytest-cov (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading pytest_cov-7.0.0-py3-none-any.whl.metadata (31 kB)
Collecting pytest-isolate (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading pytest_isolate-0.0.13-py3-none-any.whl.metadata (5.6 kB)
Collecting pytest-xdist (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading pytest_xdist-3.8.0-py3-none-any.whl.metadata (3.0 kB)
Collecting flake8 (from calamari_ocr==0.1.dev1+gde5f95294)
  Downloading flake8-7.3.0-py2.py3-none-any.whl.metadata (3.8 kB)
Collecting six (from python-bidi~=0.4.2->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading six-1.17.0-py2.py3-none-any.whl.metadata (1.7 kB)
Collecting ocrd-fork-adabelief-tf (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading ocrd_fork_adabelief_tf-0.2.1-py3-none-any.whl.metadata (968 bytes)
Collecting dataclasses-json (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading dataclasses_json-0.6.7-py3-none-any.whl.metadata (25 kB)
Collecting GitPython (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading gitpython-3.1.45-py3-none-any.whl.metadata (13 kB)
Collecting imageio (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading imageio-2.37.2-py3-none-any.whl.metadata (9.7 kB)
Collecting nptyping (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading nptyping-2.5.0-py3-none-any.whl.metadata (7.6 kB)
Collecting opencv-python-headless (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading opencv_python_headless-4.12.0.88-cp37-abi3-manylinux2014_x86_64.manylinux_2_17_x86_64.whl.metadata (19 kB)
Collecting openpyxl (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading openpyxl-3.1.5-py2.py3-none-any.whl.metadata (2.5 kB)
Collecting paiargparse==1.1.2 (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading paiargparse-1.1.2-py3-none-any.whl.metadata (10 kB)
Collecting pandas (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading pandas-2.3.3-cp312-cp312-manylinux_2_24_x86_64.manylinux_2_28_x86_64.whl.metadata (91 kB)
Collecting pillow (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading pillow-12.0.0-cp312-cp312-manylinux_2_27_x86_64.manylinux_2_28_x86_64.whl.metadata (8.8 kB)
Collecting prettytable (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading prettytable-3.17.0-py3-none-any.whl.metadata (34 kB)
Collecting python-Levenshtein (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading python_levenshtein-0.27.3-py3-none-any.whl.metadata (3.9 kB)
Collecting scikit-image (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading scikit_image-0.26.0-cp312-cp312-manylinux_2_24_x86_64.manylinux_2_28_x86_64.whl.metadata (15 kB)
Collecting pooch==1.4.0 (from ocrd-fork-tfaip>=1.2.7->calamari_ocr==0.1.dev1+gde5f95294)
  Downloading pooch-1.4.0-py3-none-any.whl.metadata (10 kB)
INFO: pip is looking at multiple versions of ocrd-fork-tfaip to determine which version is compatible with other requirements. This could take a while.
ERROR: Cannot install None, calamari-ocr[test]==0.1.dev1+gde5f95294 and calamari_ocr because these package versions have conflicting dependencies.

The conflict is caused by:
    calamari-ocr 0.1.dev1+gde5f95294 depends on tensorflow>=2.4.0
    calamari-ocr[test] 0.1.dev1+gde5f95294 depends on tensorflow>=2.4.0
    ocrd-fork-tfaip 1.2.7 depends on tensorflow<2.16.0 and >=2.4.0

Additionally, some packages in these conflicts have no matching distributions available for your environment:
    tensorflow

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip to attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts
Error: Process completed with exit code 1.