systems.
-.. IDLE
- ====
+Documentation
+=============
+
+The documentation continues to be improved.
+
+A table of quick links has been added to the top of lengthy sections such as
+:ref:`built-in-funcs`. In the case of :mod:`itertools`, the links are
+accompanied by tables of cheatsheet-style summaries to provide an overview and
+memory jog without having to read all of the docs.
+
+In some cases, the pure python source code can be helpful adjunct to the docs,
+so now some modules feature quick links to the latest version of the source
+code. For example, the :mod:`functools` module documentation has a quick link
+at the top labeled :source:`functools Python source code <Lib/functools.py>`.
+
+The docs now contain more examples and recipes. In particular, :mod:`re` module
+has an extensive section, :ref:`re-examples`. Likewise, the :mod:`itertools`
+module continues to be updated with new :ref:`itertools-recipes`.
+
+
+IDLE
+====
* The format menu now has an option to clean-up source files by strip trailing
whitespace (:issue:`5150`).
* Hash values are now values of a new type, Py_hash_t, which is defined to
be the same size as a pointer. Previously they were of type long, which
- on some 64-bit operating systems is still only 32 bits long.
+ on some 64-bit operating systems is still only 32 bits long. As a result
+ of this fix, :class:`set` and :class:`dict` can now hold more than ``2**32``
+ entries on builds with 64-bit pointers (previously, they could grow to
+ that size but their performance degraded catastrophically).
(Contributed by Benjamin Peterson; :issue:`9778`.)
* The :mod:`nntplib` module was reworked extensively, meaning that its APIs
are often incompatible with the 3.1 APIs.
-* :class:`bytearray` objects cannot be used any more as filenames: convert them
- to :class:`bytes`.
+* :class:`bytearray` objects can no longer be used as filenames; instead,
+ they should be converted to :class:`bytes`.
* PyArg_Parse*() functions:
information and a less complicated signature for calling a destructor.
* The :func:`sys.setfilesystemencoding` function was removed because
- it has a flawed design.
+ it had a flawed design.