diff options
| -rw-r--r-- | Doc/whatsnew/3.4.rst | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst index bf4b7e6c16..65cc4644ff 100644 --- a/Doc/whatsnew/3.4.rst +++ b/Doc/whatsnew/3.4.rst @@ -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`.) |