Python: Add Poetry IDEA instructions (apache#4980)

python/CONTRIBUTING.md

@@ -34,6 +34,22 @@ To get started, you can run `make install`, which will install poetry and it wil
 
 If you want to install the library on the host, you can simply run `pip3 install -e .`. If you wish to use a virtual environment, you can run `poetry shell`. Poetry will open up a virtual environment with all the dependencies set.
 
+To set up IDEA with Poetry ([also on Loom](https://www.loom.com/share/6d36464d45f244729d91003e7f671fd2)):
+
+- Open up the Python project in IntelliJ
+- Make sure that you're on a lastest master (that includes Poetry)
+- Go to File -> Project Structure (⌘;)
+- Go to Platform Settings -> SDKs
+- Click the + sign -> Add Python SDK
+- Select Poetry Environment from the left hand side bar and hit OK
+- It can take some time to download all the dependencies based on your internet
+- Go to Project Settings -> Project
+- Select the Poetry SDK from the SDK dropdown, and click OK
+
+For IDEA ≤2021 you need to install the [Poetry integration as a plugin](https://plugins.jetbrains.com/plugin/14307-poetry/).
+
+Now you're set using Poetry, and all the tests will run in Poetry, and you'll have syntax highlighting in the pyproject.toml to indicate stale dependencies.
+
 ## Linting
 
 We rely on `pre-commit` to apply autoformatting and linting: