Error with pytorch-lightning 2.0.0

[jlkjlkj]

Describe the bug
After initial standalone install with WLS2 Ubuntu 22.04.2 LTS running on Windows 11 and pytorch-lightning 2.0.0, I got below mentioned error. After downgrading to 1.7.2 the error disappeared.

To Reproduce
Steps to reproduce the behavior:

1. Start WSL2
2. conda activate graphnet
3. cd graphnet
4. cd examples
5. cd 04_training
6. python 01_train_model.py

Expected behavior

TypeError: `devices` selected with `CPUAccelerator` should be an int > 0.

Full traceback
Please include the full error message to allow for debugging

Traceback (most recent call last):
  File "01_train_model.py", line 171, in <module>
    main(
  File "01_train_model.py", line 97, in main
    model.fit(
  File "/home/jonathan/graphnet/src/graphnet/models/model.py", line 93, in fit
    self._construct_trainers(
  File "/home/jonathan/graphnet/src/graphnet/models/model.py", line 50, in _construct_trainers
    self._trainer = Trainer(
  File "/home/jonathan/anaconda3/envs/graphnet/lib/python3.8/site-packages/pytorch_lightning/utilities/argparse.py", line 69, in insert_env_defaults
    return fn(self, **kwargs)
  File "/home/jonathan/anaconda3/envs/graphnet/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 393, in __init__
    self._accelerator_connector = _AcceleratorConnector(
  File "/home/jonathan/anaconda3/envs/graphnet/lib/python3.8/site-packages/pytorch_lightning/trainer/connectors/accelerator_connector.py", line 157, in __init__
    self._set_parallel_devices_and_init_accelerator()
  File "/home/jonathan/anaconda3/envs/graphnet/lib/python3.8/site-packages/pytorch_lightning/trainer/connectors/accelerator_connector.py", line 391, in _set_parallel_devices_and_init_accelerator
    self._devices_flag = accelerator_cls.parse_devices(self._devices_flag)
  File "/home/jonathan/anaconda3/envs/graphnet/lib/python3.8/site-packages/pytorch_lightning/accelerators/cpu.py", line 47, in parse_devices
    devices = _parse_cpu_cores(devices)
  File "/home/jonathan/anaconda3/envs/graphnet/lib/python3.8/site-packages/lightning_fabric/accelerators/cpu.py", line 85, in _parse_cpu_cores
    raise TypeError("`devices` selected with `CPUAccelerator` should be an int > 0.")
TypeError: `devices` selected with `CPUAccelerator` should be an int > 0.

Additional context

$ pip list
Package                       Version                  Editable project location
----------------------------- ------------------------ ---------------------------
aiohttp                       3.8.4
aiosignal                     1.3.1
alabaster                     0.7.13
appdirs                       1.4.4
astroid                       2.15.1
async-timeout                 4.0.2
attrs                         22.2.0
awkward                       1.10.3
Babel                         2.12.1
beautifulsoup4                4.12.0
black                         23.1.0
certifi                       2022.12.7
cfgv                          3.3.1
charset-normalizer            2.1.1
click                         8.1.3
colorlog                      6.7.0
ConfigUpdater                 3.1.1
contourpy                     1.0.7
coverage                      7.2.2
css-html-js-minify            2.5.5
cycler                        0.11.0
dill                          0.3.6
distlib                       0.3.6
docformatter                  1.5.1
docker-pycreds                0.4.0
docutils                      0.19
exceptiongroup                1.1.1
filelock                      3.10.7
fonttools                     4.39.3
frozenlist                    1.3.3
fsspec                        2023.3.0
gitdb                         4.0.10
GitPython                     3.1.31
graphnet                      0+untagged.2320.g9530955 /home/jonathan/graphnet/src
greenlet                      2.0.2
identify                      2.5.22
idna                          3.4
imagesize                     1.4.1
importlib-metadata            6.1.0
importlib-resources           5.12.0
iniconfig                     2.0.0
isort                         5.12.0
Jinja2                        3.1.2
joblib                        1.2.0
kiwisolver                    1.4.4
lazy-object-proxy             1.9.0
lightning-utilities           0.8.0
lxml                          4.9.2
markdown-it-py                2.2.0
MarkupSafe                    2.1.0
matplotlib                    3.7.1
mccabe                        0.7.0
mdit-py-plugins               0.3.5
mdurl                         0.1.2
multidict                     6.0.4
mypy                          1.1.1
mypy-extensions               1.0.0
myst-parser                   1.0.0
nodeenv                       1.7.0
numpy                         1.24.2
packaging                     23.0
pandas                        1.5.3
pathspec                      0.11.1
pathtools                     0.1.2
Pillow                        9.4.0
pip                           23.0.1
platformdirs                  3.2.0
pluggy                        1.0.0
pre-commit                    3.2.1
protobuf                      4.22.1
psutil                        5.9.4
pyarrow                       11.0.0
pydantic                      1.10.7
pydocstyle                    6.3.0
Pygments                      2.14.0
pylint                        2.17.1
pyparsing                     3.0.9
pytest                        7.2.2
pytest-order                  1.1.0
python-dateutil               2.8.2
python-slugify                8.0.1
pytorch-lightning             2.0.0
pytz                          2023.2
PyYAML                        6.0
requests                      2.28.2
ruamel.yaml                   0.17.21
ruamel.yaml.clib              0.2.7
scikit-learn                  1.2.2
scipy                         1.10.1
sentry-sdk                    1.18.0
setproctitle                  1.3.2
setuptools                    67.6.0
six                           1.16.0
smmap                         5.0.0
snowballstemmer               2.2.0
soupsieve                     2.4
Sphinx                        6.1.3
sphinx_autodoc_typehints      1.22
sphinx-material               0.0.35
sphinxcontrib-applehelp       1.0.4
sphinxcontrib-devhelp         1.0.2
sphinxcontrib-htmlhelp        2.0.1
sphinxcontrib-jsmath          1.0.1
sphinxcontrib-qthelp          1.0.3
sphinxcontrib-serializinghtml 1.1.5
SQLAlchemy                    2.0.7
text-unidecode                1.3
threadpoolctl                 3.1.0
timer                         0.2.2
tomli                         2.0.1
tomlkit                       0.11.7
torch                         1.11.0+cpu
torch-cluster                 1.6.0
torch-geometric               2.0.4
torch-scatter                 2.0.9
torch-sparse                  0.6.13
torchmetrics                  0.11.4
tqdm                          4.65.0
typing_extensions             4.5.0
Unidecode                     1.3.6
untokenize                    0.1.1
urllib3                       1.26.15
versioneer                    0.28
virtualenv                    20.21.0
wandb                         0.14.0
wheel                         0.40.0
wrapt                         1.15.0
yarl                          1.8.2
zipp                          3.15.0