# What is this PIP syntax: “azureml-dataset-runtime[pandas,fuse]” [closed]

I came recently across this environment file:

name: azureml_mnist
channels:
- conda-forge
- defaults
dependencies:
- ipykernel=5.5.3
- matplotlib=3.4.1
- python=3.8
- pip
- pip:
- azureml-dataset-runtime[pandas,fuse]


Regarding this line: azureml-dataset-runtime[pandas,fuse]

What do the square brackets mean? I've never seen packages declared like this and could not find anything in the docs to explain what this [ ] syntax means or does.

So, [] denotes extra packages that should be installed together with azureml-dataset-runtime