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

In 2015 PEP-0508 defined a way to specify optional dependencies in requirements.txt:

requests[security]

That means that yourpackage needs requests for its security option. You can install it as:

pip install yourpackage[security]