“pip-tools“ is a set of command line tools to help you keep your pip-based packages fresh, even when you’ve pinned them.

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# As part of a Python project's environment tooling (similar to pip), it's recommended to install pip-tools in each project's virtual environment:
source /path/to/venv/bin/activate
(venv)$ pip install --upgrade pip  # pip-tools needs pip==8.0 or higher (!)
(venv)$ pip install pip-tools

The instructions how to use this tool can be found here.

“pipdeptree“ is a command line utility for displaying the installed python packages in form of a dependency tree. It works for packages installed globally on a machine as well as in a virtualenv. To work with packages installed inside a virtualenv, pipdeptree also needs to be installed in the same virtualenv even if it’s already installed globally.

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# Install 
pip install pipdeptree
# Run
pipdeptree