TypeError: metaclass conflict (problem with tfaip?)

Hello!

I’m not sure if I’m missing something, but as there has already been a problem with tfaip (#205), I wanted to point out an issue I’m struggling with when installing the latest version of calamari.

Here my output. Any hints welcome, the hack provided in the above-mentioned issue does not work.

 user@user:~/virtualenvs/calamari_2-1-1/calamari(master)$ calamari-train --version
Traceback (most recent call last):
  File "/home/user/virtualenvs/calamari_2-1-1/bin/calamari-train", line 33, in <module>
    sys.exit(load_entry_point('calamari-ocr==2.1.1', 'console_scripts', 'calamari-train')())
  File "/home/user/virtualenvs/calamari_2-1-1/bin/calamari-train", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/home/user/virtualenvs/calamari_2-1-1/lib/python3.6/site-packages/importlib_metadata-4.0.1-py3.6.egg/importlib_metadata/__init__.py", line 166, in load
    module = import_module(match.group('module'))
  File "/home/user/virtualenvs/calamari_2-1-1/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/user/virtualenvs/calamari_2-1-1/lib/python3.6/site-packages/calamari_ocr-2.1.1-py3.6.egg/calamari_ocr/scripts/train.py", line 5, in <module>
    from tfaip.util.logging import logger, WriteToLogFile
  File "/home/user/virtualenvs/calamari_2-1-1/lib/python3.6/site-packages/tfaip-1.1.1-py3.6.egg/tfaip/__init__.py", line 37, in <module>
    from tfaip.scenario.scenariobaseparams import ScenarioBaseParams
  File "/home/user/virtualenvs/calamari_2-1-1/lib/python3.6/site-packages/tfaip-1.1.1-py3.6.egg/tfaip/scenario/scenariobaseparams.py", line 48, in <module>
    class ScenarioBaseParams(Generic[TDataParams, TModelParams], ABC, metaclass=ScenarioBaseParamsMeta):
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

[ChWick]

calamari 1 requires tensorflow 2.1 (maximum 2.2)

[ChWick]

The bug-fix can be integrated in the calamar/1.0 branch, however I generally do not want to maintain old releases since this would consume much more time…