What's New in Python 3.3: Split improved and new modules, start to write a summary

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Victor Stinner 2012-08-05 16:37:12 +02:00
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@ -53,6 +53,18 @@ This article explains the new features in Python 3.3, compared to 3.2.
release, so it's worth checking back even after reading earlier versions. release, so it's worth checking back even after reading earlier versions.
Summary
=======
Major changes since Python 3.2:
* 4 new modules: :mod:`faulthandler`, :mod:`ipaddress`, :mod:`lzma` and :mod:`venv`.
* Syntax changes:
- ``u'unicode'`` syntax is accepted again
- Add ``yield from`` syntax
PEP 405: Virtual Environments PEP 405: Virtual Environments
============================= =============================
@ -803,8 +815,54 @@ Builtin functions and types
matching. For example, ``'ß'.casefold()`` returns ``'ss'``. matching. For example, ``'ß'.casefold()`` returns ``'ss'``.
New and Improved Modules New Modules
======================== ===========
faulthandler
------------
This new debug module contains functions to dump Python tracebacks explicitly,
on a fault (a crash like a segmentation fault), after a timeout, or on a user
signal. Call :func:`faulthandler.enable` to install fault handlers for the
:const:`SIGSEGV`, :const:`SIGFPE`, :const:`SIGABRT`, :const:`SIGBUS`, and
:const:`SIGILL` signals. You can also enable them at startup by setting the
:envvar:`PYTHONFAULTHANDLER` environment variable or by using :option:`-X`
``faulthandler`` command line option.
Example of a segmentation fault on Linux: ::
$ python -q -X faulthandler
>>> import ctypes
>>> ctypes.string_at(0)
Fatal Python error: Segmentation fault
Current thread 0x00007fb899f39700:
File "/home/python/cpython/Lib/ctypes/__init__.py", line 486 in string_at
File "<stdin>", line 1 in <module>
Segmentation fault
ipaddress
---------
The new :mod:`ipaddress` module provides tools for creating and manipulating
objects representing IPv4 and IPv6 addresses, networks and interfaces (i.e.
an IP address associated with a specific IP subnet).
(Contributed by Google and Peter Moody in :pep:`3144`)
lzma
----
The newly-added :mod:`lzma` module provides data compression and decompression
using the LZMA algorithm, including support for the ``.xz`` and ``.lzma``
file formats.
(Contributed by Nadeem Vawda and Per Øyvind Karlsen in :issue:`6715`)
Improved Modules
================
abc abc
--- ---
@ -1062,30 +1120,6 @@ API changes
changed to match the order displayed by :func:`repr`. changed to match the order displayed by :func:`repr`.
faulthandler
------------
This new debug module contains functions to dump Python tracebacks explicitly,
on a fault (a crash like a segmentation fault), after a timeout, or on a user
signal. Call :func:`faulthandler.enable` to install fault handlers for the
:const:`SIGSEGV`, :const:`SIGFPE`, :const:`SIGABRT`, :const:`SIGBUS`, and
:const:`SIGILL` signals. You can also enable them at startup by setting the
:envvar:`PYTHONFAULTHANDLER` environment variable or by using :option:`-X`
``faulthandler`` command line option.
Example of a segmentation fault on Linux: ::
$ python -q -X faulthandler
>>> import ctypes
>>> ctypes.string_at(0)
Fatal Python error: Segmentation fault
Current thread 0x00007fb899f39700:
File "/home/python/cpython/Lib/ctypes/__init__.py", line 486 in string_at
File "<stdin>", line 1 in <module>
Segmentation fault
ftplib ftplib
------ ------
@ -1155,25 +1189,6 @@ written on the :class:`~io.TextIOWrapper` object is immediately handled to its
underlying binary buffer. underlying binary buffer.
ipaddress
---------
The new :mod:`ipaddress` module provides tools for creating and manipulating
objects representing IPv4 and IPv6 addresses, networks and interfaces (i.e.
an IP address associated with a specific IP subnet).
(Contributed by Google and Peter Moody in :pep:`3144`)
lzma
----
The newly-added :mod:`lzma` module provides data compression and decompression
using the LZMA algorithm, including support for the ``.xz`` and ``.lzma``
file formats.
(Contributed by Nadeem Vawda and Per Øyvind Karlsen in :issue:`6715`)
math math
---- ----