Skip to main content

ObjectBox is a superfast lightweight database for objects

Project description

ObjectBox Python API

ObjectBox is a superfast database for objects, now also available for Python with a simple CRUD API.

  • Python version: 3.4+
  • Platforms supported:
    • Linux x86-64 (64-bit)
    • Linux ARMv6hf (e.g. Raspberry PI Zero)
    • Linux ARMv7hf (e.g. Raspberry PI 3)
    • MacOS x86-64 (64-bit)
    • MacOS arm64 (Apple silicon)
    • Windows x86-64 (64-bit)

Getting started

First of all, install the latest version:

pip install --upgrade objectbox

To start using ObjectBox as a storage for your data, you need to define your model first. The model consists of Python classes annotated with @Entity decorator.

Model IDs and UIDs

Each Entity has to have an ID (unique among entities). Properties need an ID as well (unique inside one Entity). Both Entities and Properties must also have an UID, which is a globally unique identifier.

For other ObjectBox supported languages, the binding takes care of assigning these IDs/UIDs but this feature is not yet implemented for Python. To learn more, see ObjectBox Java documentation

from objectbox.model import *

@Entity(id=1, uid=1)
class Person:
    id = Id(id=1, uid=1001)
    name = Property(str, id=2, uid=1002)
    is_enabled = Property(bool, id=3, uid=1003)
    # int can be stored with 64 (default), 32, 16 or 8 bit precision.
    int64 = Property(int, id=4, uid=1004)
    int32 = Property(int,, id=5, uid=1005)
    int16 = Property(int, type=PropertyType.short, id=6, uid=1006)
    int8 = Property(int, type=PropertyType.byte, id=7, uid=1007)
    # float can be stored with 64 or 32 (default) bit precision.
    float64 = Property(float, id=8, uid=1008)
    float32 = Property(float, type=PropertyType.float, id=9, uid=1009)
    byte_array = Property(bytes, id=10, uid=1010)
    # Regular properties are not stored.
    transient = ""

Using ObjectBox

To actually use the database, you launch (or "build") it with the model you've just defined. Afterwards, you can reuse the instance (ob in the example below) and use it to access "Entity Boxes" which hold your objects.

import objectbox
# from mypackage.model import Person

# Configure ObjectBox: should be done only once in the whole program and the "ob" variable should be kept around
model = objectbox.Model()
model.entity(Person, last_property_id=objectbox.model.IdUid(10, 1010))
model.last_entity_id = objectbox.model.IdUid(1, 1)
ob = objectbox.Builder().model(model).directory("db").build()

# Open the box of "Person" entity. This can be called many times but you can also pass the variable around
box = objectbox.Box(ob, Person)

id = box.put(Person(name="Joe Green"))  # Create
person = box.get(id)  # Read = "Joe Black"
box.put(person)       # Update
box.remove(person)    # Delete

Additionally, see the TaskList example app. After checking out this repository to run the example:

// Set up virtual environment, download ObjectBox libraries
make depend

// Activate virtual environment...
// ...on Linux
source .venv/bin/activate
// ...on Windows

// Run the example
python3 -m example

// Once done, leave the virtual environment

For more information and code examples, see the tests folder. The docs for other languages may also help you understand the basics.

Some features

  • automatic transactions (ACID compliant)
  • bulk operations

Coming in the future

The goodness you know from the other ObjectBox language-bindings, e.g.,

  • model management (no need to manually set id/uid)
  • automatic model migration (no schema upgrade scripts etc.)
  • powerful queries
  • relations (to-one, to-many)
  • asynchronous operations
  • secondary indexes

Help wanted

ObjectBox for Python is still in an early stage with limited feature set (compared to other languages). To bring all these features to Python, we're asking the community to help out. PRs are more than welcome! The ObjectBox team will try its best to guide you and answer questions. See to get started.


Also, please let us know your feedback by opening an issue: for example, if you experience errors or if you have ideas for how to improve the API. Thanks!


Copyright 2019-2021 ObjectBox Ltd. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Built Distribution

objectbox-0.4.0-py3-none-any.whl (2.1 MB view hashes)

Uploaded py3

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page