_cppyy_backend.py causes error in python 3.11

[tdubose]

In python 3.11 file.open("rU") (_cppyy_backend.py:95) cling/python/cppyy_backend/_cppyy_generator.py:95 causes an error. Removal of the U solves this issue without apparent side effects.

[wlav]

What/where is _cppyy_backend.py?

[tdubose]

Apologies, I meant
cling/python/cppyy_backend/_cppyy_generator.py

[vanguard737]

FWIW, I just got bit by this one on 3.12. Workaround was just to muck around with my conda venv like so; not pretty but it did the trick:

sed -ibak s/"rU"/"r"/ $CONDA_PREFIX/lib/python3.12/site-packages/cppyy_backend/_cppyy_generator.py

Long thread below. tl;dr Looks like 'rU' has been deprecated since python 3.3, and was outright removed in ~3.10:

python/cpython#81511

[wlav]

Thanks for reviving this one. :) Removed. (The generator code was contributed and doesn't have good test coverage.)