Meltano

This is a framework built on top of the Singer Spec.

When creating a Tap, Meltano’s quickstart CLI tool generates a Python package with three files:

Python module	Description
client.py	Optional file for client code logic if multiple streams share the same client
stream.py	A data stream corresponding to one table.
tap.py	Class that interfaces with the rest of the Singer ecosystem. Responsible for providing the list of user-defined streams.

Call hierarchy

The relevant ones when a user defines their own methods & hooks.

flowchart
	Tap:cli --> Tap:sync_all --> Stream:sync
	Stream:sync --> Stream._sync_records --> Stream.get_records --> Stream.post_process