How do I manage transactions in SQLAlchemy?

How do I manage transactions in SQLAlchemy?

In SQLAlchemy, you can manage transactions using the Session object. You can start a transaction with session.begin(), and commit it with session.commit(). If you need to roll back, you can use session.rollback().

Can you give me an example of starting and committing a transaction?

Sure! Here's a simple example:

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker

engine = create_engine('sqlite:///example.db')
Session = sessionmaker(bind=engine)
session = Session()

try:
    session.begin()
    # Your database operations here
    session.commit()
except Exception as e:
    session.rollback()
    print(f'Error: {e}')
finally:
    session.close()

What happens if I forget to commit or rollback?

If you forget to commit or rollback, the transaction will remain open, which can lead to database locks and other issues. It's important to always ensure that you either commit or rollback your transactions.