Merge Windows What's New changes from 3.3

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Nick Coghlan 2012-09-30 13:02:03 +05:30
commit ee5ef0733c
2 changed files with 39 additions and 0 deletions

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@ -132,6 +132,8 @@ Consult :command:`set /?` for details on this behaviour.
Setting Environment variables, Louis J. Farrugia Setting Environment variables, Louis J. Farrugia
.. _windows-path-mod:
Finding the Python executable Finding the Python executable
----------------------------- -----------------------------

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@ -289,6 +289,43 @@ details).
and Martin von Löwis. and Martin von Löwis.
.. _pep-397:
PEP 397: Python Launcher for Windows
====================================
The Python 3.3 Windows installer now includes a ``py`` launcher application
that can be used to launch Python applications in a version independent
fashion.
This launcher is invoked implicitly when double-clicking ``*.py`` files.
If only a single Python version is installed on the system, that version
will be used to run the file. If multiple versions are installed, the most
recent version is used by default, but this can be overridden by including
a Unix-style "shebang line" in the Python script.
The launcher can also be used explicitly from the command line as the ``py``
application. Running ``py`` follows the same version selection rules as
implicitly launching scripts, but a more specific version can be selected
by passing appropriate arguments (such as ``-3`` to request Python 3 when
Python 2 is also installed, or ``-2.6`` to specifclly request an earlier
Python version when a more recent version is installed).
In addition to the launcher, the Windows installer now includes an
option to add the newly installed Python to the system PATH (contributed
by Brian Curtain in :issue:`3561`).
.. seealso::
:pep:`397` - Python Launcher for Windows
PEP written by Mark Hammond and Martin v. Löwis; implementation by
Vinay Sajip.
Launcher documentation: :ref:`launcher`
Installer PATH modification: :ref:`windows-path-mod`
.. _pep-3151: .. _pep-3151:
PEP 3151: Reworking the OS and IO exception hierarchy PEP 3151: Reworking the OS and IO exception hierarchy