Deprecations


https://docs.python.org/3/library/warnings.html#warnings.deprecated
*Added in version 3.13: See [PEP 702](https://peps.python.org/pep-0702/).*

```python
from warnings import deprecated

@deprecated("Use the new way instead")
def the_old_way():
print("God dag!")

def main():
print("Hello from foo!")

if __name__ == "__main__":
main()
the_old_way()
```

```bash
$ uv run mypy main.py --enable-error-code=deprecated
main.py:15: error: function main.the_old_way is deprecated: Use the new way instead [deprecated]
Found 1 error in 1 file (checked 1 source file)
```