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Daft: the distributed Python dataframe for complex data

Daft is a fast, Pythonic and scalable open-source dataframe library built for Python and Machine Learning workloads.

Daft is currently in its Alpha release phase - please expect bugs and rapid improvements to the project. We welcome user feedback/feature requests in our Discussions forums

Table of Contents

• About Daft
• Getting Started
• License

About Daft

The Daft dataframe is a table of data with rows and columns. Columns can contain any Python objects, which allows Daft to support rich complex data types such as images, audio, video and more.

1. Any Data: Columns can contain any Python objects, which means that the Python libraries you already use for running machine learning or custom data processing will work natively with Daft!
2. Notebook Computing: Daft is built for the interactive developer experience on a notebook - intelligent caching/query optimizations accelerates your experimentation and data exploration.
3. Distributed Computing: Rich complex formats such as images can quickly outgrow your local laptop's computational resources - Daft integrates natively with Ray for running dataframes on large clusters of machines with thousands of CPUs/GPUs.

Getting Started

Installation

Install Daft with pip install getdaft.

For more advanced installations (e.g. installing from source or with extra dependencies such as Ray and AWS utilities), please see our Installation Guide

Quickstart

Check out our 10-minute quickstart!

In this example, we load images from an AWS S3 bucket and run a simple function to generate thumbnails for each image:

from daft import DataFrame, lit

import io
from PIL import Image

def get_thumbnail(img: Image.Image) -> Image.Image:
    """Simple function to make an image thumbnail"""
    imgcopy = img.copy()
    imgcopy.thumbnail((48, 48))
    return imgcopy

# Load a dataframe from files in an S3 bucket
df = DataFrame.from_files("s3://daft-public-data/laion-sample-images/*")

# Get the AWS S3 url of each image
df = df.select(lit("s3://").str.concat(df["name"]).alias("s3_url"))

# Download images and load as a PIL Image object
df = df.with_column("image", df["s3_url"].url.download().apply(lambda data: Image.open(io.BytesIO(data))))

# Generate thumbnails from images
df = df.with_column("thumbnail", df["image"].apply(get_thumbnail))

df.show(3)

More Resources

• 10-minute tour of Daft - learn more about Daft's full range of capabilities including dataloading from URLs, joins, user-defined functions (UDF), groupby, aggregations and more.
• User Guide - take a deep-dive into each topic within Daft
• API Reference - API reference for public classes/functions of Daft

Contributing

To start contributing to Daft, please read CONTRIBUTING.md

Telemetry

To help improve Daft, we collect non-identifiable data.

To disable this behavior, set the following environment variable: DAFT_ANALYTICS_ENABLED=0

The data that we collect is:

1. Non-identifiable: events are keyed by a session ID which is generated on import of Daft
2. Metadata-only: we do not collect any of our users’ proprietary code or data
3. For development only: we do not buy or sell any user data

Please see our documentation for more details.

License

Daft has an Apache 2.0 license - please see the LICENSE file.