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<h1 id="what-s-new"><span id="changes"></span>What’s new<a class="headerlink" href="#what-s-new" title="Permalink to this headline">¶</a></h1>
<div class="contents topic">
<p class="topic-title first"><a id="contents" name="contents">Contents</a></p>
<ul class="simple">
<li><a class="reference" href="#what-s-new" id="id4" name="id4">What’s new</a><ul>
<li><a class="reference" href="#release-0-9" id="id5" name="id5">Release 0.9</a><ul>
<li><a class="reference" href="#new-features" id="id6" name="id6">New features</a></li>
<li><a class="reference" href="#bug-fixes" id="id7" name="id7">Bug fixes</a></li>
<li><a class="reference" href="#backwards-incompatible-changes" id="id8" name="id8">Backwards incompatible changes</a></li>
<li><a class="reference" href="#changes-merged-in-from-ipython1" id="id9" name="id9">Changes merged in from IPython1</a><ul>
<li><a class="reference" href="#id1" id="id10" name="id10">New features</a></li>
<li><a class="reference" href="#id2" id="id11" name="id11">Bug fixes</a></li>
<li><a class="reference" href="#id3" id="id12" name="id12">Backwards incompatible changes</a></li>
</ul>
</li>
</ul>
</li>
<li><a class="reference" href="#release-0-8-4" id="id13" name="id13">Release 0.8.4</a></li>
<li><a class="reference" href="#release-0-8-3" id="id14" name="id14">Release 0.8.3</a></li>
<li><a class="reference" href="#release-0-8-2" id="id15" name="id15">Release 0.8.2</a></li>
<li><a class="reference" href="#older-releases" id="id16" name="id16">Older releases</a></li>
</ul>
</li>
</ul>
</div>
<div class="section">
<h2 id="release-0-9">Release 0.9<a class="headerlink" href="#release-0-9" title="Permalink to this headline">¶</a></h2>
<div class="section">
<h3 id="new-features">New features<a class="headerlink" href="#new-features" title="Permalink to this headline">¶</a></h3>
<ul class="simple">
<li>All furl files and security certificates are now put in a read-only directory
named ~./ipython/security.</li>
<li>A single function <tt class="xref docutils literal"><span class="pre">get_ipython_dir()</span></tt>, in <tt class="xref docutils literal"><span class="pre">IPython.genutils</span></tt> that
determines the user’s IPython directory in a robust manner.</li>
<li>Laurent’s WX application has been given a top-level script called ipython-wx,
and it has received numerous fixes. We expect this code to be
architecturally better integrated with Gael’s WX ‘ipython widget’ over the
next few releases.</li>
<li>The Editor synchronization work by Vivian De Smedt has been merged in. This
code adds a number of new editor hooks to synchronize with editors under
Windows.</li>
<li>A new, still experimental but highly functional, WX shell by Gael Varoquaux.
This work was sponsored by Enthought, and while it’s still very new, it is
based on a more cleanly organized arhictecture of the various IPython
components. We will continue to develop this over the next few releases as a
model for GUI components that use IPython.</li>
<li>Another GUI frontend, Cocoa based (Cocoa is the OSX native GUI framework),
authored by Barry Wark. Currently the WX and the Cocoa ones have slightly
different internal organizations, but the whole team is working on finding
what the right abstraction points are for a unified codebase.</li>
<li>As part of the frontend work, Barry Wark also implemented an experimental
event notification system that various ipython components can use. In the
next release the implications and use patterns of this system regarding the
various GUI options will be worked out.</li>
<li>IPython finally has a full test system, that can test docstrings with
IPython-specific functionality. There are still a few pieces missing for it
to be widely accessible to all users (so they can run the test suite at any
time and report problems), but it now works for the developers. We are
working hard on continuing to improve it, as this was probably IPython’s
major Achilles heel (the lack of proper test coverage made it effectively
impossible to do large-scale refactoring). The full test suite can now
be run using the <strong>iptest</strong> command line program.</li>
<li>The notion of a task has been completely reworked. An <cite>ITask</cite> interface has
been created. This interface defines the methods that tasks need to
implement. These methods are now responsible for things like submitting
tasks and processing results. There are two basic task types:
<tt class="xref docutils literal"><span class="pre">IPython.kernel.task.StringTask</span></tt> (this is the old <cite>Task</cite> object, but
renamed) and the new <tt class="xref docutils literal"><span class="pre">IPython.kernel.task.MapTask</span></tt>, which is based on
a function.</li>
<li>A new interface, <tt class="xref docutils literal"><span class="pre">IPython.kernel.mapper.IMapper</span></tt> has been defined to
standardize the idea of a <cite>map</cite> method. This interface has a single <cite>map</cite>
method that has the same syntax as the built-in <cite>map</cite>. We have also defined
a <cite>mapper</cite> factory interface that creates objects that implement
<tt class="xref docutils literal"><span class="pre">IPython.kernel.mapper.IMapper</span></tt> for different controllers. Both the
multiengine and task controller now have mapping capabilties.</li>
<li>The parallel function capabilities have been reworks. The major changes are
that i) there is now an <cite>@parallel</cite> magic that creates parallel functions,
ii) the syntax for mulitple variable follows that of <cite>map</cite>, iii) both the
multiengine and task controller now have a parallel function implementation.</li>
<li>All of the parallel computing capabilities from <cite>ipython1-dev</cite> have been
merged into IPython proper. This resulted in the following new subpackages:
<tt class="xref docutils literal"><span class="pre">IPython.kernel</span></tt>, <tt class="xref docutils literal"><span class="pre">IPython.kernel.core</span></tt>, <tt class="xref docutils literal"><span class="pre">IPython.config</span></tt>,
<tt class="xref docutils literal"><span class="pre">IPython.tools</span></tt> and <tt class="xref docutils literal"><span class="pre">IPython.testing</span></tt>.</li>
<li>As part of merging in the <cite>ipython1-dev</cite> stuff, the <cite>setup.py</cite> script and
friends have been completely refactored. Now we are checking for
dependencies using the approach that matplotlib uses.</li>
<li>The documentation has been completely reorganized to accept the documentation
from <cite>ipython1-dev</cite>.</li>
<li>We have switched to using Foolscap for all of our network protocols in
<tt class="xref docutils literal"><span class="pre">IPython.kernel</span></tt>. This gives us secure connections that are both
encrypted and authenticated.</li>
<li>We have a brand new <cite>COPYING.txt</cite> files that describes the IPython license
and copyright. The biggest change is that we are putting “The IPython
Development Team” as the copyright holder. We give more details about
exactly what this means in this file. All developer should read this and use
the new banner in all IPython source code files.</li>
<li>sh profile: ./foo runs foo as system command, no need to do !./foo anymore</li>
<li>String lists now support <tt class="docutils literal"><span class="pre">sort(field,</span> <span class="pre">nums</span> <span class="pre">=</span> <span class="pre">True)</span></tt> method (to easily sort
system command output). Try it with <tt class="docutils literal"><span class="pre">a</span> <span class="pre">=</span> <span class="pre">!ls</span> <span class="pre">-l</span> <span class="pre">;</span> <span class="pre">a.sort(1,</span> <span class="pre">nums=1)</span></tt>.</li>
<li>‘%cpaste foo’ now assigns the pasted block as string list, instead of string</li>
<li>The ipcluster script now run by default with no security. This is done
because the main usage of the script is for starting things on localhost.
Eventually when ipcluster is able to start things on other hosts, we will put
security back.</li>
<li>‘cd –foo’ searches directory history for string foo, and jumps to that dir.
Last part of dir name is checked first. If no matches for that are found,
look at the whole path.</li>
</ul>
</div>
<div class="section">
<h3 id="bug-fixes">Bug fixes<a class="headerlink" href="#bug-fixes" title="Permalink to this headline">¶</a></h3>
<ul class="simple">
<li>The Windows installer has been fixed. Now all IPython scripts have <tt class="docutils literal"><span class="pre">.bat</span></tt>
versions created. Also, the Start Menu shortcuts have been updated.</li>
<li>The colors escapes in the multiengine client are now turned off on win32 as
they don’t print correctly.</li>
<li>The <tt class="xref docutils literal"><span class="pre">IPython.kernel.scripts.ipengine</span></tt> script was exec’ing
mpi_import_statement incorrectly, which was leading the engine to crash when
mpi was enabled.</li>
<li>A few subpackages had missing <tt class="docutils literal"><span class="pre">__init__.py</span></tt> files.</li>
<li>The documentation is only created if Sphinx is found. Previously, the
<tt class="docutils literal"><span class="pre">setup.py</span></tt> script would fail if it was missing.</li>
<li>Greedy <tt class="docutils literal"><span class="pre">cd</span></tt> completion has been disabled again (it was enabled in 0.8.4) as
it caused problems on certain platforms.</li>
</ul>
</div>
<div class="section">
<h3 id="backwards-incompatible-changes">Backwards incompatible changes<a class="headerlink" href="#backwards-incompatible-changes" title="Permalink to this headline">¶</a></h3>
<ul class="simple">
<li>The <tt class="docutils literal"><span class="pre">clusterfile</span></tt> options of the <strong>ipcluster</strong> command has been
removed as it was not working and it will be replaced soon by something much
more robust.</li>
<li>The <tt class="xref docutils literal"><span class="pre">IPython.kernel</span></tt> configuration now properly find the user’s
IPython directory.</li>
<li>In ipapi, the <tt class="xref docutils literal"><span class="pre">make_user_ns()</span></tt> function has been replaced with
<tt class="xref docutils literal"><span class="pre">make_user_namespaces()</span></tt>, to support dict subclasses in namespace
creation.</li>
<li><tt class="xref docutils literal"><span class="pre">IPython.kernel.client.Task</span></tt> has been renamed
<tt class="xref docutils literal"><span class="pre">IPython.kernel.client.StringTask</span></tt> to make way for new task types.</li>
<li>The keyword argument <cite>style</cite> has been renamed <cite>dist</cite> in <cite>scatter</cite>, <cite>gather</cite>
and <cite>map</cite>.</li>
<li>Renamed the values that the rename <cite>dist</cite> keyword argument can have from
<cite>‘basic’</cite> to <cite>‘b’</cite>.</li>
<li>IPython has a larger set of dependencies if you want all of its capabilities.
See the <cite>setup.py</cite> script for details.</li>
<li>The constructors for <tt class="xref docutils literal"><span class="pre">IPython.kernel.client.MultiEngineClient</span></tt> and
<tt class="xref docutils literal"><span class="pre">IPython.kernel.client.TaskClient</span></tt> no longer take the (ip,port) tuple.
Instead they take the filename of a file that contains the FURL for that
client. If the FURL file is in your IPYTHONDIR, it will be found automatically
and the constructor can be left empty.</li>
<li>The asynchronous clients in <tt class="xref docutils literal"><span class="pre">IPython.kernel.asyncclient</span></tt> are now created
using the factory functions <tt class="xref docutils literal"><span class="pre">get_multiengine_client()</span></tt> and
<tt class="xref docutils literal"><span class="pre">get_task_client()</span></tt>. These return a <cite>Deferred</cite> to the actual client.</li>
<li>The command line options to <cite>ipcontroller</cite> and <cite>ipengine</cite> have changed to
reflect the new Foolscap network protocol and the FURL files. Please see the
help for these scripts for details.</li>
<li>The configuration files for the kernel have changed because of the Foolscap
stuff. If you were using custom config files before, you should delete them
and regenerate new ones.</li>
</ul>
</div>
<div class="section">
<h3 id="changes-merged-in-from-ipython1">Changes merged in from IPython1<a class="headerlink" href="#changes-merged-in-from-ipython1" title="Permalink to this headline">¶</a></h3>
<div class="section">
<h4 id="id1">New features<a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h4>
<ul class="simple">
<li>Much improved <tt class="docutils literal"><span class="pre">setup.py</span></tt> and <tt class="docutils literal"><span class="pre">setupegg.py</span></tt> scripts. Because Twisted and
zope.interface are now easy installable, we can declare them as dependencies
in our setupegg.py script.</li>
<li>IPython is now compatible with Twisted 2.5.0 and 8.x.</li>
<li>Added a new example of how to use <tt class="xref docutils literal"><span class="pre">ipython1.kernel.asynclient</span></tt>.</li>
<li>Initial draft of a process daemon in <tt class="xref docutils literal"><span class="pre">ipython1.daemon</span></tt>. This has not
been merged into IPython and is still in <cite>ipython1-dev</cite>.</li>
<li>The <tt class="docutils literal"><span class="pre">TaskController</span></tt> now has methods for getting the queue status.</li>
<li>The <tt class="docutils literal"><span class="pre">TaskResult</span></tt> objects not have information about how long the task
took to run.</li>
<li>We are attaching additional attributes to exceptions <tt class="docutils literal"><span class="pre">(_ipython_*)</span></tt> that
we use to carry additional info around.</li>
<li>New top-level module <tt class="xref docutils literal"><span class="pre">asyncclient</span></tt> that has asynchronous versions (that
return deferreds) of the client classes. This is designed to users who want
to run their own Twisted reactor.</li>
<li>All the clients in <tt class="xref docutils literal"><span class="pre">client</span></tt> are now based on Twisted. This is done by
running the Twisted reactor in a separate thread and using the
<tt class="xref docutils literal"><span class="pre">blockingCallFromThread()</span></tt> function that is in recent versions of Twisted.</li>
<li>Functions can now be pushed/pulled to/from engines using
<tt class="xref docutils literal"><span class="pre">MultiEngineClient.push_function()</span></tt> and
<tt class="xref docutils literal"><span class="pre">MultiEngineClient.pull_function()</span></tt>.</li>
<li>Gather/scatter are now implemented in the client to reduce the work load
of the controller and improve performance.</li>
<li>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.</li>
<li>New developer oriented documentation: development guidelines and roadmap.</li>
<li>Traditional <tt class="docutils literal"><span class="pre">ChangeLog</span></tt> has been changed to a more useful <tt class="docutils literal"><span class="pre">changes.txt</span></tt>
file that is organized by release and is meant to provide something more
relevant for users.</li>
</ul>
</div>
<div class="section">
<h4 id="id2">Bug fixes<a class="headerlink" href="#id2" title="Permalink to this headline">¶</a></h4>
<ul class="simple">
<li>Created a proper <tt class="docutils literal"><span class="pre">MANIFEST.in</span></tt> file to create source distributions.</li>
<li>Fixed a bug in the <tt class="docutils literal"><span class="pre">MultiEngine</span></tt> interface. Previously, multi-engine
actions were being collected with a <tt class="xref docutils literal"><span class="pre">DeferredList</span></tt> with
<tt class="docutils literal"><span class="pre">fireononeerrback=1</span></tt>. 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
<tt class="docutils literal"><span class="pre">fireononeerrback=0</span></tt> to make sure all results (or exceptions) are in
before returning and 2) introduced a <tt class="xref docutils literal"><span class="pre">CompositeError</span></tt> exception
that wraps all of the engine exceptions. This is a huge change as it means
that users will have to catch <tt class="xref docutils literal"><span class="pre">CompositeError</span></tt> rather than the actual
exception.</li>
</ul>
</div>
<div class="section">
<h4 id="id3">Backwards incompatible changes<a class="headerlink" href="#id3" title="Permalink to this headline">¶</a></h4>
<ul class="simple">
<li>All names have been renamed to conform to the lowercase_with_underscore
convention. This will require users to change references to all names like
<tt class="docutils literal"><span class="pre">queueStatus</span></tt> to <tt class="docutils literal"><span class="pre">queue_status</span></tt>.</li>
<li>Previously, methods like <tt class="xref docutils literal"><span class="pre">MultiEngineClient.push()</span></tt> and
<tt class="xref docutils literal"><span class="pre">MultiEngineClient.push()</span></tt> used <tt class="docutils literal"><span class="pre">*args</span></tt> and <tt class="docutils literal"><span class="pre">**kwargs</span></tt>. 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 <tt class="docutils literal"><span class="pre">*All</span></tt> methods like <tt class="xref docutils literal"><span class="pre">pushAll()</span></tt> and
<tt class="xref docutils literal"><span class="pre">pullAll()</span></tt>. These things are now handled with the <tt class="docutils literal"><span class="pre">targets</span></tt> keyword
argument that defaults to <tt class="docutils literal"><span class="pre">'all'</span></tt>.</li>
<li>The <tt class="xref docutils literal"><span class="pre">MultiEngineClient.magicTargets</span></tt> has been renamed to
<tt class="xref docutils literal"><span class="pre">MultiEngineClient.targets</span></tt>.</li>
<li>All methods in the MultiEngine interface now accept the optional keyword
argument <tt class="docutils literal"><span class="pre">block</span></tt>.</li>
<li>Renamed <tt class="xref docutils literal"><span class="pre">RemoteController</span></tt> to <tt class="xref docutils literal"><span class="pre">MultiEngineClient</span></tt> and
<tt class="xref docutils literal"><span class="pre">TaskController</span></tt> to <tt class="xref docutils literal"><span class="pre">TaskClient</span></tt>.</li>
<li>Renamed the top-level module from <tt class="xref docutils literal"><span class="pre">api</span></tt> to <tt class="xref docutils literal"><span class="pre">client</span></tt>.</li>
<li>Most methods in the multiengine interface now raise a <tt class="xref docutils literal"><span class="pre">CompositeError</span></tt>
exception that wraps the user’s exceptions, rather than just raising the raw
user’s exception.</li>
<li>Changed the <tt class="docutils literal"><span class="pre">setupNS</span></tt> and <tt class="docutils literal"><span class="pre">resultNames</span></tt> in the <tt class="docutils literal"><span class="pre">Task</span></tt> class to <tt class="docutils literal"><span class="pre">push</span></tt>
and <tt class="docutils literal"><span class="pre">pull</span></tt>.</li>
</ul>
</div>
</div>
</div>
<div class="section">
<h2 id="release-0-8-4">Release 0.8.4<a class="headerlink" href="#release-0-8-4" title="Permalink to this headline">¶</a></h2>
<p>This was a quick release to fix an unfortunate bug that slipped into the 0.8.3
release. The <tt class="docutils literal"><span class="pre">--twisted</span></tt> option was disabled, as it turned out to be broken
across several platforms.</p>
</div>
<div class="section">
<h2 id="release-0-8-3">Release 0.8.3<a class="headerlink" href="#release-0-8-3" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li>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.</li>
</ul>
</div>
<div class="section">
<h2 id="release-0-8-2">Release 0.8.2<a class="headerlink" href="#release-0-8-2" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li>%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.</li>
</ul>
</div>
<div class="section">
<h2 id="older-releases">Older releases<a class="headerlink" href="#older-releases" title="Permalink to this headline">¶</a></h2>
<p>Changes in earlier releases of IPython are described in the older file
<tt class="docutils literal"><span class="pre">ChangeLog</span></tt>. Please refer to this document for details.</p>
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<h3><a href="index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference" href="">What’s new</a><ul>
<li><a class="reference" href="#release-0-9">Release 0.9</a><ul>
<li><a class="reference" href="#new-features">New features</a></li>
<li><a class="reference" href="#bug-fixes">Bug fixes</a></li>
<li><a class="reference" href="#backwards-incompatible-changes">Backwards incompatible changes</a></li>
<li><a class="reference" href="#changes-merged-in-from-ipython1">Changes merged in from IPython1</a><ul>
<li><a class="reference" href="#id1">New features</a></li>
<li><a class="reference" href="#id2">Bug fixes</a></li>
<li><a class="reference" href="#id3">Backwards incompatible changes</a></li>
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</li>
</ul>
</li>
<li><a class="reference" href="#release-0-8-4">Release 0.8.4</a></li>
<li><a class="reference" href="#release-0-8-3">Release 0.8.3</a></li>
<li><a class="reference" href="#release-0-8-2">Release 0.8.2</a></li>
<li><a class="reference" href="#older-releases">Older releases</a></li>
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