===================== Development version ===================== This document describes in-flight development work. .. warning:: Please do not edit this file by hand (doing so will likely cause merge conflicts for other Pull Requests). Instead, create a new file in the `docs/source/whatsnew/pr` folder Using different kernels ----------------------- .. image:: ../_images/kernel_selector_screenshot.png :alt: Screenshot of notebook kernel selection dropdown menu :align: center You can now choose a kernel for a notebook within the user interface, rather than starting up a separate notebook server for each kernel you want to use. The syntax highlighting adapts to match the language you're working in. Information about the kernel is stored in the notebook file, so when you open a notebook, it will automatically start the correct kernel. It is also easier to use the Qt console and the terminal console with other kernels, using the --kernel flag:: ipython qtconsole --kernel bash ipython console --kernel bash # To list available kernels ipython kernelspec list Kernel authors should see :ref:`kernelspecs` for how to register their kernels with IPython so that these mechanisms work. Typing unicode identifiers -------------------------- .. image:: /_images/unicode_completion.png Complex expressions can be much cleaner when written with a wider choice of characters. Python 3 allows unicode identifiers, and IPython 3 makes it easier to type those, using a feature from Julia. Type a backslash followed by a LaTeX style short name, such as ``\alpha``. Press tab, and it will turn into α. Other new features ------------------ * :class:`~.TextWidget` and :class:`~.TextareaWidget` objects now include a ``placeholder`` attribute, for displaying placeholder text before the user has typed anything. * The %load magic can now find the source for objects in the user namespace. To enable searching the namespace, use the ``-n`` option. .. sourcecode:: ipython In [1]: %load -n my_module.some_function * :class:`~.DirectView` objects have a new :meth:`~.DirectView.use_cloudpickle` method, which works like ``view.use_dill()``, but causes the ``cloudpickle`` module from PiCloud's `cloud`__ library to be used rather than dill or the builtin pickle module. __ https://pypi.python.org/pypi/cloud * Added a .ipynb exporter to nbconvert. It can be used by passing `--to notebook` as a commandline argument to nbconvert. * New nbconvert preprocessor called :class:`~.ClearOutputPreprocessor`. This clears the output from IPython notebooks. * New preprocessor for nbconvert that executes all the code cells in a notebook. To run a notebook and save its output in a new notebook:: ipython nbconvert InputNotebook --ExecutePreprocessor.enabled=True --to notebook --output Executed * Consecutive stream (stdout/stderr) output is merged into a single output in the notebook document. Previously, all output messages were preserved as separate output fields in the JSON. Now, the same merge is applied to the stored output as the displayed output, improving document load time for notebooks with many small outputs. .. DO NOT EDIT THIS LINE BEFORE RELEASE. FEATURE INSERTION POINT. Backwards incompatible changes ------------------------------ * :func:`IPython.core.oinspect.getsource` call specification has changed: * `oname` keyword argument has been added for property source formatting * `is_binary` keyword argument has been dropped, passing ``True`` had previously short-circuited the function to return ``None`` unconditionally * Removed the octavemagic extension: it is now available as ``oct2py.ipython``. * Creating PDFs with LaTeX no longer uses a post processor. Use `nbconvert --to pdf` instead of `nbconvert --to latex --post pdf`. * Used https://github.com/jdfreder/bootstrap2to3 to migrate the Notebook to Bootstrap 3. Additional changes: - Set `.tab-content .row` `0px;` left and right margin (bootstrap default is `-15px;`) - Removed `height: @btn_mini_height;` from `.list_header>div, .list_item>div` in `tree.less` - Set `#header` div `margin-bottom: 0px;` - Set `#menus` to `float: left;` - Set `#maintoolbar .navbar-text` to `float: none;` - Added no-padding convienence class. - Set border of #maintoolbar to 0px * Accessing the `container` DOM object when displaying javascript has been deprecated in IPython 2.0 in favor of accessing `element`. Starting with IPython 3.0 trying to access `container` will raise an error in browser javascript console. * ``IPython.utils.py3compat.open`` was removed: :func:`io.open` provides all the same functionality. * The NotebookManager and ``/api/notebooks`` service has been replaced by a more generic ContentsManager and ``/api/contents`` service, which supports all kinds of files. * The Dashboard now lists all files, not just notebooks and directories. * The ``--script`` hook for saving notebooks to Python scripts is removed, use :samp:`ipython nbconvert --to python {notebook}` instead. * The ``rmagic`` extension is deprecated, as it is now part of rpy2. See :mod:`rpy2.ipython.rmagic`. * :meth:`~.KernelManager.start_kernel` and :meth:`~.KernelManager.format_kernel_cmd` no longer accept a ``executable`` parameter. Use the kernelspec machinery instead. * The widget classes have been renamed from `*Widget` to `*`. The old names are still functional, but are deprecated. i.e. `IntSliderWidget` has been renamed to `IntSlider`. * The ContainerWidget was renamed to Box and no longer defaults as a flexible box in the web browser. A new FlexBox widget was added, which allows you to use the flexible box model. .. DO NOT EDIT THIS LINE BEFORE RELEASE. INCOMPAT INSERTION POINT. IFrame embedding ```````````````` The IPython Notebook and its APIs by default will only be allowed to be embedded in an iframe on the same origin. To override this, set ``headers[X-Frame-Options]`` to one of * DENY * SAMEORIGIN * ALLOW-FROM uri See `Mozilla's guide to X-Frame-Options `_ for more examples.