Watcher for long computations

I have been using this code on my server to track long computations: https://gist.github.com/albop/8c94e8694369474f7c85 . It is used to track long computations and send an email when they are finished. It uses a context-manager in the following way:

with watcher('computation name', email='my@email.com'):
    run_long_computation()

When the computation is finished it prints on screen the number of days or seconds elapsed and sends a notification by email.
A few easy improvements could be made to it:

• allow to use desktop notification instead of email
• add an IPython cell/line magic to do the same

What do you think ? If polished a little bit (no docstring), it could be a nice addition.

Start by reviewing the linked gist and the repository structure to determine whether a computation watcher already exists. Clarify whether desktop notifications, email notification, and an IPython cell/line magic are all in scope; done should be defined by an agreed implementation and tests for the selected behavior.