How to specify versions on PIP when installing a python package with it's dependencies

Question

To install Celery with it's redis dependencies, one can do this.

$ pip install celery[redis]

Is it possible to explicitly provide version numbers to both celery and redis in the above command? It will effectively be the same as the following two commands

$ pip install -Iv redis==2.10.3
$ pip install -Iv celery==3.1.18

Answer 1

You can specify it with the flag -Iv

pip install -Iv redis==2.10.3

Answer 2

Use ==:

pip install -Iv redis==2.10.3