branch: vs2010
tag: tip
user: Brian Curtin <brian@python.org>
date: Sun May 13 16:15:11 2012 -0500
summary: Changes to allow Profile Guided Optimization builds to succeed on VS2010

Issue #14245: Improve floating-point entry in FAQ.  Thanks Zbyszek Jędrzejewski-Szmek for some of the wording.

Issue #14417: Mutating a dict during lookup now restarts the lookup instead of raising a RuntimeError (undoes issue #14205).

timing attacks. Patch by Jon Oberheide.

The code itself does not raise a DeprecationWarning as the functions
are technically fine, it's just a bad API. Unfortunately experience
has shown that the terrible API has been exposed in various places,
necessitating that it stick around probably until py4k comes around
since it is such a shift to move over to importlib.find_loader().

Patch by Serhiy Storchaka.

(issue #13903).

The long-term goal is to deprecate imp.find_module() in favour of this
API, but it will take some time as some APIs explicitly return/use what
imp.find_module() returns.

universal: it returns a meaningless result. Use sys.maxsize instead of
platform.architecture as a fallback. Patch by Ned Deily.

Patch by Hynek Schlawack.

importlib.abc.FileLoader.load_module()/get_filename() and
importlib.machinery.ExtensionFileLoader.load_module() have their
single argument be optional as the loader's constructor has all the
ncessary information.

This allows for the deprecation of
imp.load_source()/load_compile()/load_package().

importlib.machinery that provide the suffix details for import.
The attributes were not put on imp so as to compartmentalize
everything importlib needs for setting up imports in
importlib.machinery.

This also led to an indirect deprecation of inspect.getmoduleinfo() as
it directly returned imp.get_suffix's returned tuple which no longer
makes sense.

import machinery is no longer implicit.

support chflag operations.  (Patch by Hynek Schlawack)

support chflag operations.  (Patch by Hynek Schlawack)