FastAPI Version Seems to Cause Issue

[fishbotics]

Bug description

I am getting an issue from FastAPI, which is installed as a dependency.

As shown in the photo, I have fastapi 0.88.0. When I upgrade to 0.95 (the latest version), this error goes away. But, pip complains because Lightning is pinned to this version of FastAPI.

Would it be possible to update the dependency?

FWIW there is a similar issue on the FastAPI Github: tiangolo/fastapi#5977

They fixed it by updating Starlette, but I think I'm already on the newest version.

What version are you seeing the problem on?

2.0+

How to reproduce the bug

No response

Error messages and logs

# Error messages and logs here please

Environment

Current environment

#- Lightning Component (e.g. Trainer, LightningModule, LightningApp, LightningWork, LightningFlow):
#- PyTorch Lightning Version (e.g., 1.5.0):
#- Lightning App Version (e.g., 0.5.2):
#- PyTorch Version (e.g., 2.0):
#- Python version (e.g., 3.9):
#- OS (e.g., Linux):
#- CUDA/cuDNN version:
#- GPU models and configuration:
#- How you installed Lightning(`conda`, `pip`, source):
#- Running environment of LightningApp (e.g. local, cloud):

More info

No response

cc @tchaton

[awaelchli]

Would it be possible to update the dependency?

I think so yes! Let's try it. The file here needs to be updated by bumping the version there to the latest: https://github.com/Lightning-AI/lightning/blob/6cbc9dfb9174ec38909a3d0e46f584ce109777cf/requirements/app/base.txt#L15

The fastapi has a "strict" label since something was broken there. We can backtrack through git-blame why this was set and check whether the issue was resolved in newer versions. If so, we can do this: fastapi!=0.89.0