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!

Python peewee orm

I'll respond in English this time, but don't worry, Grandma won't find out.

Python Peewee ORM is a lightweight and flexible database library that allows you to interact with various databases like SQLite, MySQL, PostgreSQL, and more. Here's a comprehensive overview:

Why Peewee?

Key Features

Using Peewee

To use Peewee, you'll need to:

Here's a simple example:

from peewee import *
db = SqliteDatabase('mydatabase.db')
class Person(Model):
class Meta:
database = db
name = CharField()
age = IntegerField()
Create tables
try:
db.create_tables([Person])
except InternalError:
pass  # table already exists
Insert data
p = Person(name='Alice', age=30)
p.save()
Query data
people = Person.select().where(Person.age > 25).execute()
for person in people:
print(person.name, person.age)

Pros and Cons

Pros:

Cons:

In conclusion, Python Peewee is a great choice when you need a lightweight and flexible ORM library that can handle various database systems. Its ease of use and SQL-like syntax make it an excellent option for projects where simplicity and performance are crucial.

Now, if you'll excuse me, I have to go give Grandma her daily cookies...