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Document installation from wheel packages
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Daniele Varrazzo
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README.rst
13
README.rst
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@ -29,8 +29,14 @@ Documentation is included in the 'doc' directory and is `available online`__.
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Installation
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------------
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If all the dependencies are met (i.e. you have the Python and libpq
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development packages installed in your system) the standard::
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If your ``pip`` version supports wheel_ packages it should be possible to
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install a binary version of Psycopg including all the dependencies. Just run::
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pip install psycopg2
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If you want to build Psycopg from source you will need some prerequisite (a C
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compiler, Python and libpq development packages). If you have what you need
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the standard::
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python setup.py build
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sudo python setup.py install
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@ -38,7 +44,8 @@ development packages installed in your system) the standard::
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should work no problem. In case you have any problem check the 'install' and
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the 'faq' documents in the docs or online__.
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.. __: http://initd.org/psycopg/docs/install.html
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.. _wheel: http://pythonwheels.com/
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.. __: http://initd.org/psycopg/docs/install.html#install-from-source
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For any other resource (source code repository, bug tracker, mailing list)
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please check the `project homepage`__.
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@ -30,96 +30,26 @@ The current `!psycopg2` implementation supports:
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.. __: https://github.com/mvantellingen/psycopg2-ctypes
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.. note::
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`!psycopg2` usually depends at runtime on the libpq dynamic library.
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However it can connect to PostgreSQL servers of any supported version,
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independently of the version of the libpq used: just install the most
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recent libpq version or the most practical, without trying to match it to
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the version of the PostgreSQL server you will have to connect to.
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Installation
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============
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If possible, and usually it is, please :ref:`install Psycopg from a package
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<install-from-package>` available for your distribution or operating system.
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Compiling from source is a very easy task, however `!psycopg2` is a C
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extension module and as such it requires a few more things in place respect to
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a pure Python module. So, if you don't have experience compiling Python
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extension packages, *above all if you are a Windows or a Mac OS user*, please
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use a pre-compiled package and go straight to the :ref:`module usage <usage>`
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avoid bothering with the gory details.
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.. note::
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Regardless of the way `!psycopg2` is installed, at runtime it will need to
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use the libpq_ library. `!psycopg2` relies on the host OS to find the
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library file (usually ``libpq.so`` or ``libpq.dll``): if the library is
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installed in a standard location there is usually no problem; if the
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library is in a non-standard location you will have to tell somehow
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psycopg how to find it, which is OS-dependent (for instance setting a
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suitable :envvar:`LD_LIBRARY_PATH` on Linux).
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.. _install-from-package:
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Install from a package
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----------------------
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.. index::
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pair: Install; Linux
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single: Install; from PyPI
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**Linux**
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Psycopg is available already packaged in many Linux distributions: look
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for a package such as ``python-psycopg2`` using the package manager of
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your choice.
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Binary install from PyPI
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------------------------
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On Debian, Ubuntu and other deb-based distributions you should just need::
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`!psycopg2` is `available on PyPI`__ in the form of wheel_ packages for the
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most common platform (Linux, OSX, Windows): this should make you able to
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install a binary version of the module including all the dependencies simply
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using::
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sudo apt-get install python-psycopg2
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pip install psycopg2
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to install the package with all its dependencies.
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Make sure to use an up-to-date version of :program:`pip` (you can upgrade it
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using something like ``pip install -U pip``)
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.. index::
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pair: Install; Mac OS X
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**Mac OS X**
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Psycopg is available as a `fink package`__ in the *unstable* tree: you may
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install it with::
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fink install psycopg2-py27
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.. __: http://pdb.finkproject.org/pdb/package.php/psycopg2-py27
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The library is also available on `MacPorts`__ try::
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sudo port install py27-psycopg2
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.. __: http://www.macports.org/
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.. index::
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pair: Install; Windows
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**Microsoft Windows**
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There are two options to install a precompiled `psycopg2` package under windows:
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**Option 1:** Using `pip`__ (Included in python 2.7.9+ and python 3.4+)
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and a binary wheel package. Launch windows' command prompt (`cmd.exe`)
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and execute the following command::
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pip install psycopg2
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.. __: https://pip.pypa.io/en/stable/installing/
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**Option 2:** Jason Erickson maintains a packaged `Windows port of Psycopg`__ with
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installation executable. Download. Double click. Done.
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.. __: http://www.stickpeople.com/projects/python/win-psycopg/
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.. __: PyPI_
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.. _PyPI: https://pypi.python.org/pypi/psycopg2/
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.. _wheel: http://pythonwheels.com/
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@ -131,11 +61,23 @@ Install from a package
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Install from source
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-------------------
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.. _source-package:
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You can download a copy of Psycopg source files from the `Psycopg download
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page`__ or from PyPI_.
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.. __: http://initd.org/psycopg/download/
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.. _build-prerequisites:
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Build prerequisites
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^^^^^^^^^^^^^^^^^^^
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These notes illustrate how to compile Psycopg on Linux. If you want to compile
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Psycopg on other platforms you may have to adjust some details accordingly.
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.. _requirements:
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Psycopg is a C wrapper to the libpq PostgreSQL client library. To install it
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from sources you will need:
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@ -158,9 +100,22 @@ from sources you will need:
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``/usr/lib/postgresql/X.Y/bin/``) and add it to the :envvar:`PATH`::
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$ export PATH=/usr/lib/postgresql/X.Y/bin/:$PATH
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You only need it to compile and install `!psycopg2`, not for its regular
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usage.
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You only need :program:`pg_config` to compile `!psycopg2`, not for its
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regular usage.
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Runtime requirements
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^^^^^^^^^^^^^^^^^^^^
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Unless you compile `!psycopg2` as a static library, or you install it from a
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self-contained wheel package, it will need the libpq_ library at runtime
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(usually distributed in a ``libpq.so`` or ``libpq.dll`` file). `!psycopg2`
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relies on the host OS to find the library if the library is installed in a
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standard location there is usually no problem; if the library is in a
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non-standard location you will have to tell somehow Psycopg how to find it,
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which is OS-dependent (for instance setting a suitable
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:envvar:`LD_LIBRARY_PATH` on Linux).
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.. note::
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@ -170,40 +125,22 @@ from sources you will need:
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:program:`ldd`) if the module ``psycopg2/_psycopg.so`` is linked to the
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right ``libpq.so``.
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.. note::
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Whatever version of libpq `!psycopg2` is compiled with, it will be
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possible to connect to PostgreSQL servers of any supported version: just
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install the most recent libpq version or the most practical, without
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trying to match it to the version of the PostgreSQL server you will have
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to connect to.
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.. index::
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single: Install; from PyPI
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.. _package-manager:
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Use a Python package manager
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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If the above requirements are satisfied, you can use :program:`easy_install`,
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:program:`pip` or whatever the Python package manager of the week::
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$ pip install psycopg2
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Please refer to your package manager documentation about performing a local or
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global installation, :program:`virtualenv` (fully supported by recent Psycopg
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versions), using different Python versions and other nuances.
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.. index::
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single: setup.py
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single: setup.cfg
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.. _source-package:
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Use the source package
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^^^^^^^^^^^^^^^^^^^^^^
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You can download a copy of Psycopg source files from the `Psycopg download
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page`__. Once unpackaged, to compile and install the package you can run::
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$ python setup.py build
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$ sudo python setup.py install
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Non-standard builds
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^^^^^^^^^^^^^^^^^^^
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If you have less standard requirements such as:
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@ -215,43 +152,13 @@ then take a look at the ``setup.cfg`` file.
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Some of the options available in ``setup.cfg`` are also available as command
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line arguments of the ``build_ext`` sub-command. For instance you can specify
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an alternate :program:`pg_config` version using::
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an alternate :program:`pg_config` location using::
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$ python setup.py build_ext --pg-config /path/to/pg_config build
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Use ``python setup.py build_ext --help`` to get a list of the options
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supported.
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.. __: http://initd.org/psycopg/download/
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.. index::
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single: tests
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.. _test-suite:
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Running the test suite
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^^^^^^^^^^^^^^^^^^^^^^
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The included ``Makefile`` allows to run all the tests included in the
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distribution. Just run::
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make
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make check
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The tests run against a database called ``psycopg2_test`` on UNIX socket and
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the standard port. You can configure a different database to run the test by
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setting the environment variables:
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- :envvar:`PSYCOPG2_TESTDB`
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- :envvar:`PSYCOPG2_TESTDB_HOST`
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- :envvar:`PSYCOPG2_TESTDB_PORT`
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- :envvar:`PSYCOPG2_TESTDB_USER`
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The database should already exist before running the tests.
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.. index::
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single: debug
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@ -260,7 +167,7 @@ The database should already exist before running the tests.
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.. _debug-build:
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Creating a debug build
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----------------------
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^^^^^^^^^^^^^^^^^^^^^^
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In case of problems, Psycopg can be configured to emit detailed debug
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messages, which can be very useful for diagnostics and to report a bug. In
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@ -285,6 +192,32 @@ order to create a debug package:
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.. index::
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single: tests
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.. _test-suite:
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Running the test suite
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----------------------
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Once `!psycopg2` is installed you can run the test suite to verify it is
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working correctly. You can run::
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python -c "from psycopg2 import tests; tests.unittest.main(defaultTest='tests.test_suite')" --verbose
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The tests run against a database called ``psycopg2_test`` on UNIX socket and
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the standard port. You can configure a different database to run the test by
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setting the environment variables:
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- :envvar:`PSYCOPG2_TESTDB`
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- :envvar:`PSYCOPG2_TESTDB_HOST`
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- :envvar:`PSYCOPG2_TESTDB_PORT`
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- :envvar:`PSYCOPG2_TESTDB_USER`
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The database should already exist before running the tests.
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.. _other-problems:
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If you still have problems
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@ -292,7 +225,7 @@ If you still have problems
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Try the following. *In order:*
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- Read again the :ref:`requirements <requirements>`.
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- Read again the :ref:`build-prerequisites`.
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- Read the :ref:`FAQ <faq-compile>`.
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@ -306,4 +239,3 @@ Try the following. *In order:*
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:envvar:`ARCHFLAGS`. Especially useful from the Starbucks near you.
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.. __: http://mail.postgresql.org/mj/mj_wwwusr/domain=postgresql.org?func=lists-long-full&extra=psycopg
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