ipython/ipython — pull request #1655 by tkf (2012-04-24 17:22:30+00:00)
Title: Add %open magic command to open editor in non-blocking manner

Open editor in non-blocking manner.

Usage:
%open [options] [args]

%open acts similarly as %edit. However, it does not block
IPython so that you can continue interaction with IPython and
view code at the same time. See the document of %edit for
more information. Options '-p', '-r' and '-n' are available
and same as %edit.

It is probably good to make open command configurable instead of using edit command.