Differences between version dated 2006-09-06 17:10:17 and 2009-10-20 10:08:25
(spanning 16 versions)
Deletions are marked like this.
Additions are marked like this.
that lets you automatically download, build, install, and manage Python
(Please share your experiences with us! Whether you encountered success or
difficulty installing a particular package, please add your notes to the
`Experience Reports <http://peak.telecommunity.com/DevCenter/PackageNotes>`_
page. You'll need to register for a Wiki ID if you don't already have one; you
can do that from the `User Preferences
<http://peak.telecommunity.com/DevCenter/UserPreferences>`_ page. Thanks!)
Please share your experiences with us! If you encounter difficulty installing
a package, please contact us via the `distutils mailing list
<http://mail.python.org/pipermail/distutils-sig/>`_. (Note: please DO NOT send
private email directly to the author of setuptools; it will be discarded. The
mailing list is a searchable archive of previously-asked and answered
questions; you should begin your research there before reporting something as a
bug -- and then do so via list discussion first.)
(Also, if you'd like to learn about how you can use ``setuptools`` to make your
own packages work better with EasyInstall, or provide EasyInstall-like features
Installing "Easy Install"
Download `ez_setup.py <http://peak.telecommunity.com/dist/ez_setup.py>`_, and
run it; this will download and install the appropriate ``setuptools`` egg for
your Python version. (You will need at least Python 2.3.5, or if you are on a
64-bit platform, Python 2.4.) An ``easy_install`` script will be installed in
the normal location for Python scripts on your platform. (Windows users, don't
put ``ez_setup.py`` inside your Python installation; please put it in some
other directory before running it.)
You may receive a message telling you about an obsolete version of setuptools
being present; if so, you must be sure to delete it entirely, along with the
old ``pkg_resources`` module if it's present on ``sys.path``.
The ``ez_setup.py`` script accepts the same `Command-Line Options`_ and
`Configuration Files`_ as ``easy_install`` itself, so you can use them to
control its behavior. In particular, you can use the --script-dir option to
direct script installation to a custom location. You should not, however,
use custom installation locations without first reading the section below on
`Custom Installation Locations`_.
The instructions you've just read assume that:
* You are installling to Python's primary ``site-packages`` directory
* You have unrestricted internet access on the computer where you are
If you are behind an NTLM-based firewall that prevents Python programs from
accessing the net directly, you may wish to first install and use the `APS
proxy server <http://ntlmaps.sf.net/>`_, which lets you get past such firewalls
in the same way that your web browser(s) do. This will let ``ez_setup.py``
download the setuptools egg.
If you can't use APS, or don't have internet access at all, you will need to
first download the appropriate ``.egg`` file from the `setuptools PyPI page
<http://cheeseshop.python.org/pypi/setuptools>`_ using a computer with internet
access. Place the egg in the same directory as ``ez_setup.py`` on the target
computer before running it.
If you are installing to a custom location or do not have write access to
Python's primary ``site-packages`` directory, please also see the section below
on `Custom Installation Locations`_ for more detailed instructions.
Please see the `setuptools PyPI page <http://pypi.python.org/pypi/setuptools>`_
for download links and basic installation instructions for each of the
You will need at least Python 2.3.5, or if you are on a 64-bit platform, Python
2.4. An ``easy_install`` script will be installed in the normal location for
Python scripts on your platform.
Note that the instructions on the setuptools PyPI page assume that you are
are installling to Python's primary ``site-packages`` directory. If this is
not the case, you should consult the section below on `Custom Installation
Locations`_ before installing. (And, on Windows, you should not use the
``.exe`` installer when installing to an alternate location.)
Note that ``easy_install`` normally works by downloading files from the
internet. If you are behind an NTLM-based firewall that prevents Python
programs from accessing the net directly, you may wish to first install and use
the `APS proxy server <http://ntlmaps.sf.net/>`_, which lets you get past such
firewalls in the same way that your web browser(s) do.
(Alternately, if you do not wish easy_install to actually download anything, you
can restrict it from doing so with the ``--allow-hosts`` option; see the
sections on `restricting downloads with --allow-hosts`_ and `command-line
options`_ for more details.)
If you want to delete the currently installed version of a package (or all
versions of a package), you should first run::
easy_install -m PackageName
easy_install -mxN PackageName
This will ensure that Python doesn't continue to search for a package you're
planning to remove. After you've done this, you can safely delete the .egg
2.4, you can use the ``easy_install-2.3`` or ``easy_install-2.4`` scripts to
install packages for Python 2.3 or 2.4, respectively.
Also, if you're working with Python version 2.4 or higher, you can run Python
with ``-m easy_install`` to run that particular Python version's
Restricting Downloads with ``--allow-hosts``
even if they're installed elsewhere on the machine, and ``-d`` indicates the
directory to place the eggs in.)
You can also build the eggs from local development packages that were installed
with the ``setup.py develop`` command, by including the ``-l`` option, e.g.::
easy_install -zmaxld somedir SomePackage
This will use locally-available source distributions to build the eggs.
Packaging Others' Projects As Eggs
below, and also the section on the `Package Index "API"`_.
If a site you want to download from is password-protected using HTTP "Basic"
authentication, you can specify your credentials in the URL, like so::
You can do this with both index page URLs and direct download URLs. As long
as any HTML pages read by easy_install use *relative* links to point to the
downloads, the same user ID and password will be used to do the downloading.
Controlling Build Options
installed package to work, like manually adding it to ``PYTHONPATH`` or to
``sys.path`` at runtime.
``--index-url=URL, -i URL`` (New in 0.4a1)
``--index-url=URL, -i URL`` (New in 0.4a1; default changed in 0.6c7)
Specifies the base URL of the Python Package Index. The default is
http://www.python.org/pypi if not specified. When a package is requested
http://pypi.python.org/simple if not specified. When a package is requested
that is not locally available or linked from a ``--find-links`` download
page, the package index will be searched for download pages for the needed
package, and those download pages will be searched for links to download
script directories, and does not override the ones set on the command line
or in a configuration file.
``--local-snapshots-ok, -l`` (New in 0.6c6)
Normally, EasyInstall prefers to only install *released* versions of
projects, not in-development ones, because such projects may not
have a currently-valid version number. So, it usually only installs them
when their ``setup.py`` directory is explicitly passed on the command line.
However, if this option is used, then any in-development projects that were
installed using the ``setup.py develop`` command, will be used to build
eggs, effectively upgrading the "in-development" project to a snapshot
release. Normally, this option is used only in conjunction with the
``--always-copy`` option to create a distributable snapshot of every egg
needed to run an application.
Note that if you use this option, you must make sure that there is a valid
version number (such as an SVN revision number tag) for any in-development
projects that may be used, as otherwise EasyInstall may not be able to tell
what version of the project is "newer" when future installations or
upgrades are attempted.
.. _non-root installation:
Release Notes/Change History
* Fix installed script .exe files not working with 64-bit Python on Windows
(wasn't actually released in 0.6c10 due to a lost checkin)
* Fix easy_install.exe giving UAC errors on Windows Vista
* Support for the most recent Sourceforge download link insanity
* Stop crashing on certain types of HTTP error
* Stop re-trying URLs that already failed retrieval once
* Fixes for various dependency management problems such as looping builds,
re-downloading packages already present on sys.path (but not in a registered
"site" directory), and semi-randomly preferring local "-f" packages over
local installed packages
* Fixed ``win32.exe`` support for .pth files, so unnecessary directory nesting
is flattened out in the resulting egg. (There was a case-sensitivity
problem that affected some distributions, notably ``pywin32``.)
* Prevent ``--help-commands`` and other junk from showing under Python 2.5
when running ``easy_install --help``.
* Fixed GUI scripts sometimes not executing on Windows
* Fixed not picking up dependency links from recursive dependencies.
* Only make ``.py``, ``.dll`` and ``.so`` files executable when unpacking eggs
* Changes for Jython compatibility
* Improved error message when a requirement is also a directory name, but the
specified directory is not a source package.
* Fixed ``--allow-hosts`` option blocking ``file:`` URLs
* Fixed HTTP SVN detection failing when the page title included a project
name (e.g. on SourceForge-hosted SVN)
* Fix Jython script installation to handle ``#!`` lines better when
``sys.executable`` is a script.
* Removed use of deprecated ``md5`` module if ``hashlib`` is available
* Keep site directories (e.g. ``site-packages``) from being included in
* ``ftp:`` download URLs now work correctly.
* The default ``--index-url`` is now ``http://pypi.python.org/simple``, to use
the Python Package Index's new simpler (and faster!) REST API.
* EasyInstall no longer aborts the installation process if a URL it wants to
retrieve can't be downloaded, unless the URL is an actual package download.
Instead, it issues a warning and tries to keep going.
* Fixed distutils-style scripts originally built on Windows having their line
endings doubled when installed on any platform.
* Added ``--local-snapshots-ok`` flag, to allow building eggs from projects
installed using ``setup.py develop``.
* Fixed not HTML-decoding URLs scraped from web pages
* Fixed ``.dll`` files on Cygwin not having executable permisions when an egg
is installed unzipped.
* Added support for HTTP "Basic" authentication using ``http://user:pass@host``
URLs. If a password-protected page contains links to the same host (and
protocol), those links will inherit the credentials used to access the
* Removed all special support for Sourceforge mirrors, as Sourceforge's
mirror system now works well for non-browser downloads.
* Fixed not recognizing ``win32.exe`` installers that included a custom
* Fixed not allowing ``os.open()`` of paths outside the sandbox, even if they
are opened read-only (e.g. reading ``/dev/urandom`` for random numbers, as
is done by ``os.urandom()`` on some platforms).
* Fixed a problem with ``.pth`` testing on Windows when ``sys.executable``
has a space in it (e.g., the user installed Python to a ``Program Files``
* You can once again use "python -m easy_install" with Python 2.4 and above.
* Python 2.5 compatibility fixes added.
* Windows script wrappers now support quoted arguments and arguments
containing spaces. (Patch contributed by Jim Fulton.)
* Signature checking? SSL? Ability to suppress PyPI search?
* Display byte progress meter when downloading distributions and long pages?
* Redirect stdout/stderr to log during run_setup?