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A number of changes to how traitlets and components work....
A number of changes to how traitlets and components work. * Classes can be given as strings, like 'foo.bar.Bar' in the Type and Instance traitlets as well as the get_instances method of Component. This is done to allow for forward declarations. * New IPython.utils.importstring that imports a class from a string, like 'foo.bar.Bar'.

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api_changes.txt
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=============
API Changes
=============
.. contents::
..
1 Purpose
2 Version 0.8.2
Purpose
=======
This file documents backwards-incompatible changes to the IPython API,
including user-visible changes of commands, magics, etc.
It should be filled in reverse chronological order, with one section for each
release (which means changes since the previous release).
Version 0.8.2
=============
Changes made since version 0.8.1 was released:
* %pushd/%popd behave differently; now "pushd /foo" pushes CURRENT directory
and jumps to /foo. The current behaviour is closer to the documented
behaviour, and should not trip anyone.
Version 0.8.3
=============
* pydb is now disabled by default (due to %run -d problems). You can enable
it by passing -pydb command line argument to IPython. Note that setting
it in config file won't work.