TJaniF opened a new issue, #48552:
URL: https://github.com/apache/airflow/issues/48552
### Apache Airflow version
3.0.0
### If "Other Airflow 2 version" selected, which one?
main
### What happened?
Added a dag that includes `-> bool | None:` in a function and got an import
error. This dag serializes and runs without issue in Airflow 2.10.
dag to reproduce:
```
from airflow.decorators import dag, task
def _my_func() -> bool | None:
print("Hello")
return None
@dag()
def testdag():
@task
def my_task():
_my_func()
my_task()
testdag()
```
Error:
```
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 228, in
_call_with_frames_removed
File "/files/dags/test.py", line 4, in <module>
def commit_message_checker() -> bool | None:
TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'
```
Runs in 2.10
Erros in 3.0.0
### What you think should happen instead?
The dag should serialize and run, otherwise this would be a breaking change
necessitating code edits for people upgrading.
### How to reproduce
Add the dag above to the Airflow env. Run `airflow dags reserialize`. See
the error.
### Operating System
MacOS
### Versions of Apache Airflow Providers
None
### Deployment
Other
### Deployment details
breeze
### Anything else?
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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