Issue with custom_exceptions and astropy

[astrofrog]

The following demonstrates the issue:

python -m venv clean
source clean/bin/activate
pip install solara[pytest] astropy
echo 'import astropy' > test.py
pytest test.py

the output is:

______________________________________________________________________________ ERROR collecting test.py ______________________________________________________________________________
test.py:1: in <module>
    import astropy
clean/lib/python3.11/site-packages/astropy/__init__.py:176: in <module>
    log = _init_log()
clean/lib/python3.11/site-packages/astropy/logger.py:122: in _init_log
    log._set_defaults()
clean/lib/python3.11/site-packages/astropy/logger.py:499: in _set_defaults
    if self.exception_logging_enabled():
clean/lib/python3.11/site-packages/astropy/logger.py:321: in exception_logging_enabled
    return _AstLogIPYExc in get_ipython().custom_exceptions
E   AttributeError: 'NoneType' object has no attribute 'custom_exceptions'
============================================================================== short test summary info ===============================================================================
ERROR test.py - AttributeError: 'NoneType' object has no attribute 'custom_exceptions'
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
================================================================================== 1 error in 0.14s ==================================================================================

This doesn't happen if we don't install solara into the test environment.

[maartenbreddels]

This was merged in #839 and released in (see #839) version 1.43.0

[astrofrog]

That's what I thought but now it seems get_ipython is actually returning None instead of FakeIPython hence the above error