dynamongo: Pythonic DynamoDB models

dynamongo is Python ORM/framework-agnostic library for DynamoDB. It is highly inspired by the PyMongo project. This documentation attempts to explain everything you need to know to use dynamongo.

import datetime
from dynamongo import Model, Connection
from dynamongo import IntField, StringField, ListField, EmailField, DateTimeField

# This only need be called once. Alternatively, it can be set using env variables
Connection.set_config(
    access_key_id='<KEY>',
    secret_access_key='<SECRET>',
    table_prefix='test-'
)


class User(Model):
    __table__ = 'users'
    __hash_key__ = 'email'

    email = EmailField(required=True)
    name = StringField(required=True)
    year_of_birth = IntField(max_value=2018, min_value=1900)
    cities_visited = ListField(StringField)
    created_at = DateTimeField(default=datetime.datetime.now)


# store data to DynamoDB
john = User.save_one({
    'email': 'johndoe@gmail.com',
    'name': 'John Doe',
    'year_of_birth': 1990,
    'cities_visited': ['Nairobi', 'New York']
})

# year_of_birth, cities_visited & created_at are all optional
jane = User.save_one({
    'email': 'jane@gmail.com',
    'name': 'Jane Doe'
})

# Access attribute values
print(john.name)

# Fetch data from dynamoDB
user = User.get_one(User.email == 'johndoe@gmail.com')
print(user.to_dict())

In short, dynamongo models can be used to easily:

• validate input data

• save serialized data to DynamoDB

• read and deserialize data from DynamoDB

• delete items from DynamoDB

• update data in DynamoDB

$ pip install dynamongo