Django has seen great adoption in the content management sphere, especially among the newspaper crowd. One of the trickier things to get right, is to make sure that nobody steps on each others toes while editing and modifying existing content. Newspaper editors might not always be aware of what other editors are up to, and this goes double for distributed teams. When different people work on the same content, the one who saves last will win the day, while the other edits are overwritten.
django-locking is a Django app that provides a system that makes concurrent editing impossible, and informs users of what other users are working on and for how long that content will remain locked. Users can still read locked content, but cannot modify or save it.
django-locking is fairly well-documented. Check out the docs!