Install Fabric
This tutorial shows how to install forge using minecraft-launcher-lib.
Install Fabric
Installing Fabric is very easy. Let’s say you want to install Fabric for 1.17:
minecraft_launcher_lib.fabric.install_fabric("1.17", minecraft_directory)
install_fabric() supports the same callbacks as install_minecraft_version().
Launch Fabric
Use get_installed_versions() to get a list of all installed versions. Your new installed fabric version should be in the list.
You can launch it like any other Minecraft version.