Optional dependencies in a pip requirements file

Question

How can I specify optional dependencies in a pip requirements file?

According to the pip documentation this is possible, but the documentation doesn\'t explain how t

Answer 1

You are misunderstanding the documentation; it's not as clear as it could be. The point in the documentation is that with a requirements file you can feel free to specify your full recommended working set of packages, including both necessary dependencies and optional ones.

You can add comments (lines beginning with #) to distinguish the two to humans, but pip makes no distinction. You can also have two requirements files, as Daniel suggests.