Docs: Add destinations API reference docs (#314)

airbyte/destinations/__init__.py

@@ -1,5 +1,77 @@
 # Copyright (c) 2024 Airbyte, Inc., all rights reserved.
-"""Destinations module."""
+"""Destinations module.
+
+This module contains classes and methods for interacting with Airbyte destinations. You can use this
+module to create custom destinations, or to interact with existing destinations.
+
+## Getting Started
+
+To get started with destinations, you can use the `get_destination()` method to create a destination
+object. This method takes a destination name and configuration, and returns a destination object
+that you can use to write data to the destination.
+
+```python
+import airbyte as ab
+
+my_destination = ab.get_destination(
+    "destination-foo",
+    config={"api_key": "my_api_key"},
+    docker_image=True,
+)
+```
+
+## Writing Data to a Destination
+
+To write data to a destination, you can use the `Destination.write()` method. This method
+takes either a `airbyte.Source` or `airbyte.ReadResult` object.
+
+## Writing to a destination from a source
+
+To write directly from a source, simply pass the source object to the `Destination.write()` method:
+
+```python
+my_source = get_source(...)
+my_destination = get_destination(...)
+my_destination.write(source_faker)
+```
+
+## Writing from a read result:
+
+To write from a read result, you can use the following pattern. First, read data from the source,
+then write the data to the destination, using the `ReadResult` object as a buffer between the source
+and destination:
+
+```python
+# First read data from the source:
+my_source = get_source(...)
+read_result = my_source.read(...)
+
+# Optionally, you can validate data before writing it:
+# ...misc validation code here...
+
+# Then write the data to the destination:
+my_destination.write(read_result)
+```
+
+## Using Docker and Python-based Connectors
+
+By default, the `get_destination()` method will look for a Python-based connector. If you want to
+use a Docker-based connector, you can set the `docker_image` parameter to `True`:
+
+```python
+my_destination = ab.get_destination(
+    "destination-foo",
+    config={"api_key": "my_api_key"},
+    docker_image=True,
+)
+```
+
+**Note:** Unlike source connectors, most destination connectors are written in Java, and for this
+reason are only available as Docker-based connectors. If you need to load to a SQL database and your
+runtime does not support docker, you may want to use the `airbyte.caches` module to load data to
+a SQL cache. Caches are mostly identical to destinations in behavior, and are implemented internally
+to PyAirbyte so they can run anywhere that PyAirbyte can run.
+"""
 
 from __future__ import annotations
 

airbyte/destinations/base.py

@@ -1,5 +1,8 @@
 # Copyright (c) 2024 Airbyte, Inc., all rights reserved.
-"""Destination base classes."""
+"""Destination base classes.
+
+For usage examples, see the `airbyte.destinations` module documentation.
+"""
 
 from __future__ import annotations
 

airbyte/destinations/util.py

@@ -1,5 +1,8 @@
 # Copyright (c) 2024 Airbyte, Inc., all rights reserved.
-"""Destination utilities."""
+"""Destination utilities.
+
+For usage examples, see the `airbyte.destinations` module documentation.
+"""
 
 from __future__ import annotations