bollhav 3.0.4rc2

Standardizing models and pipes for data pipelines

bollhav

Model definition framework that standardizes data-pipeline code

This library

• is permissive by design
• is designed with ✨developer experience✨ in mind

Concepts

• Model
  • Upstream
• Runtime overrides — env vars that override model settings at run time, plus the @load_models decorator
• Tags
  • matching
• Modes
• Progress Bar

Implementations:

• Postgres
• MSSQL

Demo

Explore the features

See examples/ for self-contained, runnable pipelines that isolate each feature of bollhav

Installation

pip install bollhav

TUI

bollhav ships a terminal UI for running and exploring your models — set the run env (backfill window, suffixes, state mode, …) in a form and fire a dry run, a dry-state run, or the real thing, all without remembering env-var names

Install it with the tui extra, then just run bollhav pointed at a folder that contains your models:

pip install "bollhav[tui]"

bollhav                 # browse the current directory
bollhav path/to/models  # browse a specific folder

It discovers every Model defined below that folder and runs the nearest main.py. See bollhav/tui/README.md for the full guide (keybindings, config, the two modes).

Testing

Tests use pytest. Run the full suite:

pytest tests/

Build + publish example

git tag 1.2.3 && git push --tags