benbuckman commented on issue #32384:
URL: https://github.com/apache/airflow/issues/32384#issuecomment-1623831755
mypy needs `--strict` mode to see this:
host:
```
$ docker run -it --rm apache/airflow:2.6.2-python3.10 bash
```
container:
```
$ pip install 'mypy==1.0.0'
$ printf 'from datetime import datetime
from airflow.decorators import dag, task
@task()
def demo_type_error() -> None:
...
@dag(schedule=None, start_date=datetime(2021, 1, 1), catchup=False)
def demo_dag() -> None:
demo_type_error()
demo_dag()' > /opt/airflow/dags/t.py
$ cd dags
# (this takes a while to build the cache the first time)
$ mypy --strict .
```
I see:
```
t.py:7: error: Untyped decorator makes function "demo_type_error" untyped
[misc]
Found 1 error in 1 file (checked 1 source file)
```
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