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Python Data Libraries

Project description

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mabel is a fully-portable Data Engineering platform designed to run on low-spec compute nodes.

There is no server component, mabel just runs when you need it, where you want it.

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Documentation GitHub Wiki
Bug Reports GitHub Issues
Feature Requests GitHub Issues
Source Code GitHub
Discussions GitHub Discussions

Focus on What Matters

We've built mabel to enable Data Analysts to write complex data engineering tasks quickly and easily, so they could get on with doing what they do best.

from mabel import operator
from mabel.operators import EndOperator

def say_hello(name):
    print(F"Hello, {name}!")

flow = say_hello > EndOperator()
with flow as runner:
    runner("world")  # Hello, world!

Key Features

  • Programatically define data pipelines
  • Treats datasets as immutable
  • On-the-fly compression
  • Automatic version tracking of processing operations
  • Trace messages through the pipeline (random sampling)
  • Automatic retry of failed operations
  • Low-memory requirements, even with terabytes of data
  • Indexing and partitioning of data for fast reads
  • Cursors for tracking reading position


From PyPI (recommended)

pip install --upgrade mabel

From GitHub

pip install --upgrade git+


How to Write a Flow
How to Read Data


  • dateutil is used to convert dates received as strings
  • mmh3 is used for non-cryptographic hashing
  • pydantic is used to define internal data models
  • UltraJSON (AKA ujson) is used where orjson is not available. (Notice1)
  • zstandard is used for real-time compression

There are a number of optional dependencies which are usually only required for specific features and functionality. These are listed in the requirements.txt file in the tests folder which is used for testing. The exception is orjson which is the preferred JSON library but not available on all platforms.


mabel comes with adapters for the following services:

Service Support
GCP Storage Google Cloud Storage Read/Write
MinIo MinIO Read/Write
AWS S3 S3 Read/Write

MongoDB and MQTT Readers are included in the base library but are not supported.

Deployment and Execution

mabel supports running on a range of platforms:

Docker Docker
Kubernetes Kubernetes
Raspberry Pi Raspberry Pi (Notice1)
Windows Windows (Notice2)
Linux Linux (Notice3)

MacOS also supported.

Adapters for other data services can be written.

Notice1 - Raspbian fully functional with ujson.
Notice2 - Multi-Processing not available on Windows. Alternate indexing libraries may be used on Windows.
Notice3 - Tested on Debian and Ubuntu.

How Can I Contribute?

All contributions, bug reports, bug fixes, documentation improvements, enhancements, and ideas are welcome.

If you have a suggestion for an improvement or a bug, raise a ticket or start a discussion.

Want to help build mabel? See the contribution guidance.


Apache 2.0

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