Here's the `dependencies.py` file for the specified path `app/api/core/dependencies/`:
```python
from contextlib import contextmanager
from sqlalchemy.orm import Session
from app.api.db.database import SessionLocal
@contextmanager
def get_db() -> Session:
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()
```
This file defines a context manager function `get_db` that creates a new SQLAlchemy `Session` using the `SessionLocal` imported from `app.api.db.database`. The session is yielded within the context manager, and it is automatically closed when the context manager exits, ensuring proper resource management.
To use this function in your application, you can import it and use it as a dependency in your API routes or services that require database access. For example:
```python
from fastapi import Depends
from app.api.core.dependencies import get_db
# In your API route or service
def my_function(db: Session = Depends(get_db)):
    # Use the database session 'db' here
    ...
```
By using the `Depends` function from FastAPI, the `get_db` function will be called for each request, and the resulting database session will be injected as a dependency into your function.