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whatsnew: frame.clear, expanded entry for -I/isolated mode.

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R David Murray 2014-02-24 10:38:13 -05:00
parent dda926e657
commit 26818f64f0
1 changed files with 20 additions and 2 deletions
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Doc/whatsnew/3.4.rst
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@ -95,7 +95,7 @@ New expected features for Python implementations:
* :ref:`pip should always be "available" <whatsnew-pep-453>` (:pep:`453`).
* :ref:`Make newly created file descriptors non-inheritable <whatsnew-pep-446>`
(:pep:`446`).
* command line option for :ref:`isolated mode <using-on-misc-options>`,
* command line option for :ref:`isolated mode <whatsnew-isolated-mode>`,
(:issue:`16499`).
* :ref:`improvements in the handling of codecs <codec-handling-improvements>`
that are not text encodings (multiple issues).
@ -373,6 +373,10 @@ Some smaller changes made to the core Python language are:
method for its *base* argument. (Contributed by Mark Dickinson in
:issue:`16772`.)
* Frame objects now have a :func:`~frame.clear` method that clears all
references to local variables from the frame. (Contributed by Antoine Pitrou
in :issue:`17934`.)
New Modules
===========
@ -1253,7 +1257,8 @@ traceback
A new :func:`traceback.clear_frames` function takes a traceback object
and clears the local variables in all of the frames it references,
reducing the amount of memory consumed (:issue:`1565525`).
reducing the amount of memory consumed. (Contributed by Andrew Kuchling in
:issue:`1565525`).
urllib
@ -1485,6 +1490,19 @@ Other Build and C API Changes
Other Improvements
------------------
.. _whatsnew-isolated-mode:
* The :ref:`python <using-on-cmdline>` command has a new :ref:`option
<using-on-misc-options>`, ``-I``, which causes it to run in "isolated mode",
which means that :data:`sys.path` contains neither the script's directory nor
the user's ``site-packages`` directory, and all :envvar:`PYTHON*` environment
variables are ignored (it implies both ``-s`` and ``-E``). Other
restrictions may also be applied in the future, with the goal being to
isolate the execution of a script from the user's environment. This is
appropriate, for example, when Python is used to run a system script. On
most POSIX systems it can and should be used in the ``#!`` line of system
scripts. (Contributed by Christian Heims in :issue:`16499`.)
* Tab-completion is now enabled by default in the interactive interpreter.
(Contributed by Antoine Pitrou and Éric Araujo in :issue:`5845`.)