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