https://packaging.python.org/en/latest/specifications/dependency-specifiers/#extras There's one at https://packaging.python.org/en/latest/specifications/dependency-specifiers/#examples , but if you happened to be deep-linked into the "Extras" part of that page you probably would miss that example at the top.
https://packaging.python.org/en/latest/specifications/dependency-specifiers/#extras
There's one at https://packaging.python.org/en/latest/specifications/dependency-specifiers/#examples , but if you happened to be deep-linked into the "Extras" part of that page you probably would miss that example at the top.