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Overview
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========
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This document describes the steps required to install IPython. IPython is
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organized into a number of subpackages, each of which has its own dependencies.
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All of the subpackages come with IPython, so you don't need to download and
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install them separately. However, to use a given subpackage, you will need to
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install all of its dependencies.
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Please let us know if you have problems installing IPython or any of its
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dependencies. Officially, IPython requires Python version 2.6 or 2.7. There
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is an experimental port of IPython for Python3 `on GitHub
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<https://github.com/ipython/ipython-py3k>`_
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.. warning::
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Officially, IPython supports Python versions 2.6 and 2.7.
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IPython 0.11 has a hard syntax dependency on 2.6, and will no longer work
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on Python <= 2.5.
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Some of the installation approaches use the :mod:`setuptools` package and its
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:command:`easy_install` command line program. In many scenarios, this provides
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the most simple method of installing IPython and its dependencies. It is not
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required though. More information about :mod:`setuptools` can be found on its
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website.
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.. note::
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On Windows, IPython *does* depend on :mod:`setuptools`, and it is recommended
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that you install the :mod:`distribute` package, which improves
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:mod:`setuptools` and fixes various bugs.
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We hope to remove this dependency in 0.12.
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More general information about installing Python packages can be found in
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Python's documentation at http://www.python.org/doc/.
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Quickstart
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==========
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If you have :mod:`setuptools` installed and you are on OS X or Linux (not
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Windows), the following will download and install IPython *and* the main
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optional dependencies:
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.. code-block:: bash
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$ easy_install ipython[zmq,test]
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This will get pyzmq, which is needed for
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IPython's parallel computing features as well as the nose package, which will
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enable you to run IPython's test suite.
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To run IPython's test suite, use the :command:`iptest` command:
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.. code-block:: bash
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$ iptest
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Read on for more specific details and instructions for Windows.
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Installing IPython itself
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=========================
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Given a properly built Python, the basic interactive IPython shell will work
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with no external dependencies. However, some Python distributions
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(particularly on Windows and OS X), don't come with a working :mod:`readline`
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module. The IPython shell will work without :mod:`readline`, but will lack
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many features that users depend on, such as tab completion and command line
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editing. If you install IPython with :mod:`setuptools`, (e.g. with `easy_install`),
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then the appropriate :mod:`readline` for your platform will be installed.
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See below for details of how to make sure you have a working :mod:`readline`.
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Installation using easy_install
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-------------------------------
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If you have :mod:`setuptools` installed, the easiest way of getting IPython is
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to simple use :command:`easy_install`:
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.. code-block:: bash
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$ easy_install ipython
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That's it.
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Installation from source
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------------------------
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If you don't want to use :command:`easy_install`, or don't have it installed,
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just grab the latest stable build of IPython from `here
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<https://github.com/ipython/ipython/downloads>`_. Then do the following:
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.. code-block:: bash
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$ tar -xzf ipython.tar.gz
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$ cd ipython
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$ python setup.py install
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If you are installing to a location (like ``/usr/local``) that requires higher
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permissions, you may need to run the last command with :command:`sudo`.
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Windows
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-------
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.. note::
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On Windows, IPython requires :mod:`setuptools` or :mod:`distribute`.
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We hope to remove this dependency in 0.12.
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There are a few caveats for Windows users. The main issue is that a basic
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``python setup.py install`` approach won't create ``.bat`` file or Start Menu
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shortcuts, which most users want. To get an installation with these, you can
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use any of the following alternatives:
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1. Install using :command:`easy_install`.
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2. Install using our binary ``.exe`` Windows installer, which can be found
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`here <http://ipython.scipy.org/dist/>`_
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3. Install from source, but using :mod:`setuptools` (``python setupegg.py
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install``).
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IPython by default runs in a terminal window, but the normal terminal
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application supplied by Microsoft Windows is very primitive. You may want to
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download the excellent and free Console_ application instead, which is a far
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superior tool. You can even configure Console to give you by default an
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IPython tab, which is very convenient to create new IPython sessions directly
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from the working terminal.
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.. _Console: http://sourceforge.net/projects/console
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Note for Windows 64 bit users: you may have difficulties with the stock
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installer on 64 bit systems; in this case (since we currently do not have 64
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bit builds of the Windows installer) your best bet is to install from source
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with the setuptools method indicated in #3 above. See `this bug report`_ for
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further details.
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.. _this bug report: https://bugs.launchpad.net/ipython/+bug/382214
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Installing the development version
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----------------------------------
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It is also possible to install the development version of IPython from our
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`Git <http://git-scm.com/>`_ source code repository. To do this you will
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need to have Git installed on your system. Then just do:
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.. code-block:: bash
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$ git clone https://github.com/ipython/ipython.git
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$ cd ipython
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$ python setup.py install
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Again, this last step on Windows won't create ``.bat`` files or Start Menu
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shortcuts, so you will have to use one of the other approaches listed above.
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Some users want to be able to follow the development branch as it changes. If
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you have :mod:`setuptools` installed, this is easy. Simply replace the last
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step by:
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.. code-block:: bash
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$ python setupegg.py develop
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This creates links in the right places and installs the command line script to
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the appropriate places. Then, if you want to update your IPython at any time,
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just do:
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.. code-block:: bash
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$ git pull
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Basic optional dependencies
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===========================
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There are a number of basic optional dependencies that most users will want to
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get. These are:
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* readline (for command line editing, tab completion, etc.)
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* nose (to run the IPython test suite)
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* pexpect (to use things like irunner)
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If you are comfortable installing these things yourself, have at it, otherwise
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read on for more details.
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readline
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--------
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In principle, all Python distributions should come with a working
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:mod:`readline` module. But, reality is not quite that simple. There are two
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common situations where you won't have a working :mod:`readline` module:
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* If you are using the built-in Python on Mac OS X.
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* If you are running Windows, which doesn't have a :mod:`readline` module.
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When IPython is installed with :mod:`setuptools`, (e.g. with `easy_install`),
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readline is added as a dependency on OS X, and PyReadline on Windows, and will
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be installed on your system. However, if you do not use setuptools, you may
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have to install one of these packages yourself.
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On OS X, the built-in Python doesn't not have :mod:`readline` because of
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license issues. Starting with OS X 10.5 (Leopard), Apple's built-in Python has
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a BSD-licensed not-quite-compatible readline replacement. As of IPython 0.9,
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many of the issues related to the differences between readline and libedit seem
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to have been resolved. While you may find libedit sufficient, we have
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occasional reports of bugs with it and several developers who use OS X as their
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main environment consider libedit unacceptable for productive, regular use with
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IPython.
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Therefore, we *strongly* recommend that on OS X you get the full
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:mod:`readline` module. We will *not* consider completion/history problems to
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be bugs for IPython if you are using libedit.
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To get a working :mod:`readline` module, just do (with :mod:`setuptools`
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installed):
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.. code-block:: bash
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$ easy_install readline
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.. note::
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Other Python distributions on OS X (such as fink, MacPorts and the official
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python.org binaries) already have readline installed so you likely don't
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have to do this step.
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If needed, the readline egg can be build and installed from source (see the
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wiki page at http://ipython.scipy.org/moin/InstallationOSXLeopard).
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On Windows, you will need the PyReadline module. PyReadline is a separate,
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Windows only implementation of readline that uses native Windows calls through
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:mod:`ctypes`. The easiest way of installing PyReadline is you use the binary
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installer available `here <https://launchpad.net/pyreadline/+download>`_.
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nose
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----
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To run the IPython test suite you will need the :mod:`nose` package. Nose
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provides a great way of sniffing out and running all of the IPython tests. The
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simplest way of getting nose, is to use :command:`easy_install`:
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.. code-block:: bash
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$ easy_install nose
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Another way of getting this is to do:
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.. code-block:: bash
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$ easy_install ipython[test]
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For more installation options, see the `nose website
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<http://somethingaboutorange.com/mrl/projects/nose/>`_.
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Once you have nose installed, you can run IPython's test suite using the
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iptest command:
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.. code-block:: bash
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$ iptest
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pexpect
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-------
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The pexpect package is used in IPython's :command:`irunner` script, as well as
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for managing subprocesses [pexpect]_. IPython now includes a version of pexpect
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in :mod:`IPython.external`, but if you have installed pexpect, IPython will use
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that instead. On Unix platforms (including OS X), just do:
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.. code-block:: bash
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$ easy_install pexpect
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Windows users are out of luck as pexpect does not run there.
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Dependencies for IPython.parallel (parallel computing)
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======================================================
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:mod:`IPython.kernel` has been replaced by :mod:`IPython.parallel`,
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which uses ZeroMQ for all communication.
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IPython.parallel provides a nice architecture for parallel computing. The
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main focus of this architecture is on interactive parallel computing. These
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features require just one package: pyzmq. See the next section for pyzmq
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details.
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On a Unix style platform (including OS X), if you want to use
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:mod:`setuptools`, you can just do:
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.. code-block:: bash
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$ easy_install ipython[zmq] # will include pyzmq
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Security in IPython.parallel is provided by SSH tunnels. By default, Linux
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and OSX clients will use the shell ssh command, but on Windows, we also
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support tunneling with paramiko [paramiko]_.
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Dependencies for IPython.zmq
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============================
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pyzmq
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-----
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IPython 0.11 introduced some new functionality, including a two-process
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execution model using ZeroMQ for communication [ZeroMQ]_. The Python bindings
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to ZeroMQ are found in the pyzmq project, which is easy_install-able once you
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have ZeroMQ installed. If you are on Python 2.6 or 2.7 on OSX, or 2.7 on Windows,
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pyzmq has eggs that include ZeroMQ itself.
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IPython.zmq depends on pyzmq >= 2.1.4.
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Dependencies for ipython qtconsole (new GUI)
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============================================
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Qt
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--
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Also with 0.11, a new GUI was added using the work in :mod:`IPython.zmq`,
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which can be launched with ``ipython qtconsole``. The GUI is built on Qt, and works
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with either PyQt, which can be installed from the
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`PyQt website <http://www.riverbankcomputing.co.uk/>`_, or
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`PySide <http://www.pyside.org/>`_, from Nokia.
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pygments
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--------
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The syntax-highlighting in ``ipython qtconsole`` is done with the pygments project,
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which is easy_install-able [pygments]_.
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.. [ZeroMQ] ZeroMQ. http://www.zeromq.org
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.. [paramiko] paramiko. https://github.com/robey/paramiko
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.. [pygments] Pygments syntax highlighting. http://pygments.org
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.. [pexpect] Pexpect. http://www.noah.org/wiki/Pexpect
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