What is SQLAlchemy and how do I use it?

What is SQLAlchemy and how do I use it?

SQLAlchemy is a SQL toolkit and Object-Relational Mapping (ORM) system for Python. It allows you to interact with databases using Python objects.

Can you show me a simple example of how to connect to a database using SQLAlchemy?

Sure! Here's a basic example:

from sqlalchemy import create_engine

# Create an engine
engine = create_engine('sqlite:///example.db')

# Connect to the database
connection = engine.connect()

What are sessions in SQLAlchemy?

Sessions in SQLAlchemy are used to manage the persistence of objects. They handle transactions and allow you to interact with the database.

How do I perform a query using SQLAlchemy?

You can perform a query using the session object. For example:

from sqlalchemy.orm import sessionmaker

Session = sessionmaker(bind=engine)
session = Session()

# Querying
results = session.query(YourModel).all()