===================
Changes in IPython
===================

.. contents::

Release 0.3
===========

New features
------------

	* Much improved ``setup.py`` and ``setupegg.py`` scripts.  Because Twisted
	  and zope.interface are now easy installable, we can declare them as dependencies
	  in our setupegg.py script.
	* IPython is now compatible with Twisted 2.5.0 and 8.x.
	* Added a new example of how to use :mod:`ipython1.kernel.asynclient`.
	* Initial draft of a process daemon in :mod:`ipython1.daemon`.
	* The ``TaskController`` now has methods for getting the queue status.
	* The ``TaskResult`` objects not have information about how long the task
	  took to run.
	* We are attaching additional attributes to exceptions ``(_ipython_*)`` that 
	  we use to carry additional info around.
	* New top-level module :mod:`asynclient` that has asynchronous versions (that
	  return deferreds) of the client classes.  This is designed to users who want
	  to run their own Twisted reactor
	* All the clients in :mod:`client` are now based on Twisted.  This is done by 
	  running the Twisted reactor in a separate thread and using the
	  :func:`blockingCallFromThread` function that is in recent versions of Twisted.
	* Functions can now be pushed/pulled to/from engines using
	  :meth:`MultiEngineClient.push_function` and :meth:`MultiEngineClient.pull_function`.
	* Gather/scatter are now implemented in the client to reduce the work load
	  of the controller and improve performance.
	* Complete rewrite of the IPython docuementation.  All of the documentation
	  from the IPython website has been moved into docs/source as restructured
	  text documents.  PDF and HTML documentation are being generated using 
	  Sphinx.
	* New developer oriented documentation: development guidelines and roadmap. 
	* Traditional ``ChangeLog`` has been changed to a more useful ``changes.txt`` file
	  that is organized by release and is meant to provide something more relevant
	  for users.

Bug fixes
---------

	* Created a proper ``MANIFEST.in`` file to create source distributions.
	* Fixed a bug in the ``MultiEngine`` interface.  Previously, multi-engine 
	  actions were being collected with a :class:`DeferredList` with 
	  ``fireononeerrback=1``.  This meant that methods were returning 
	  before all engines had given their results.  This was causing extremely odd 
	  bugs in certain cases. To fix this problem, we have 1) set 
	  ``fireononeerrback=0`` to make sure all results (or exceptions) are in 
	  before returning and 2) introduced a :exc:`CompositeError` exception 
	  that wraps all of the engine exceptions.  This is a huge change as it means 
	  that users will have to catch :exc:`CompositeError` rather than the actual
	  exception.

Backwards incompatible changes
------------------------------

	* All names have been renamed to conform to the lowercase_with_underscore
	  convention.  This will require users to change references to all names like
	  ``queueStatus`` to ``queue_status``.
	* Previously, methods like :meth:`MultiEngineClient.push` and    	
	  :meth:`MultiEngineClient.push` used ``*args`` and ``**kwargs``.  This was 
	  becoming a problem as we weren't able to introduce new keyword arguments into
	  the API.  Now these methods simple take a dict or sequence.  This has also allowed
	  us to get rid of the ``*All`` methods like :meth:`pushAll` and :meth:`pullAll`.
	  These things are now handled with the ``targets`` keyword argument that defaults
	  to ``'all'``.
	* The :attr:`MultiEngineClient.magicTargets` has been renamed to
	  :attr:`MultiEngineClient.targets`. 
	* All methods in the MultiEngine interface now accept the optional keyword argument
	  ``block``.
	* Renamed :class:`RemoteController` to :class:`MultiEngineClient` and 
	  :class:`TaskController` to :class:`TaskClient`.
	* Renamed the top-level module from :mod:`api` to :mod:`client`.
	* Most methods in the multiengine interface now raise a :exc:`CompositeError` exception
	  that wraps the user's exceptions, rather than just raising the raw user's exception.
	* Changed the ``setupNS`` and ``resultNames`` in the ``Task`` class to ``push`` 
	  and ``pull``.

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.

Releases prior to 0.3
=====================

Changes prior to version 0.3 of IPython are described in the older file ``ChangeLog``.  
Please refer to this document for details.