How do I use rollback in SQLAlchemy?

How do I use rollback in SQLAlchemy?

In SQLAlchemy, you can use the rollback() method on a session to revert any changes made during the current transaction.

Can you give me an example of how to implement it?

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:
    # Perform some operations
    session.add(new_object)
    session.commit()  # Commit the changes
except Exception as e:
    session.rollback()  # Rollback in case of error
    print(f'Error occurred: {e}')
finally:
    session.close()

What happens if I don't use rollback?

If you don't use rollback and an error occurs, the session will remain in a broken state, and no changes will be committed.