Python peewee tutorial

Python peewee tutorial

Here is a Python Peewee tutorial for you:

What is Peewee?

Peewee is an ORM (Object-Relational Mapping) tool for Python, designed to work with SQLite databases. It's a lightweight alternative to more complex ORMs like SQLAlchemy or Django's built-in ORM.

Getting Started

To get started with Peewee, you need to install it using pip:

pip install peewee

Once installed, you can import the necessary modules and create a database connection:

import peewee
Create a database connection
db = peewee.SqliteDatabase('mydatabase.db')

Models

In Peewee, models are classes that represent tables in your database. Each model needs to inherit from peewee.Model. Let's create a simple example:

class Author(peewee.Model):
class Meta:
database = db
name = peewee.CharField()
email = peewee.CharField(unique=True)

In this example, we're creating an Author model with two fields: name and email. The Meta inner-class is used to specify the database connection for this model.

Table Creation

To create the table in your database, simply use the following code:

try:
db.create_tables([Author])
except peewee.Error as e:
print(f"Error: {e}")

This will create the authors table in your database, with columns for name and email.

Inserting Data

Now that our table is created, we can start inserting data:

# Create some authors
author1 = Author(name='John Doe', email='[email protected]')
author2 = Author(name='Jane Smith', email='[email protected]')
Save the authors to the database
author1.save()
author2.save()

Querying Data

Peewee provides a simple and intuitive way to query your data. Let's find all the authors in our database:

authors = Author.select().execute()
for author in authors:
print(author.name, author.email)

This will print out each author's name and email.

Advanced Features

Peewee has many advanced features that make it a powerful ORM tool. Some of these include:

These are just the basics of Peewee. With its simplicity and flexibility, it's an excellent choice for building Python applications that interact with SQLite databases.

Conclusion

Peewee is a lightweight ORM tool for Python that provides a simple way to interact with SQLite databases. It's ideal for small projects or prototyping. If you're looking for a more comprehensive ORM solution, SQLAlchemy or Django's built-in ORM might be better suited for your needs.

I hope this tutorial has helped you get started with Peewee!

What databases are supported by Python?

Python supports a wide range of databases, making it a versatile language for data manipulation and analysis. Here's an overview of the various databases that Python has connections with:

This list is not exhaustive, but it highlights the diverse range of databases that Python can work with. Whether you're dealing with traditional relational databases or cutting-edge NoSQL and graph databases, Python's versatility makes it an excellent choice for data-driven projects!