This required moving the class from importlib/abc.py into
importlib/_bootstrap.py and jiggering some code to work better with the class.
This included changing how the file finder worked to better meet import
semantics. This also led to fixing importlib to handle the empty string from
sys.path as import currently does (and making me wish we didn't support that
instead just required people to insert '.' instead to represent cwd).

It also required making the new set_data abstractmethod create
any needed subdirectories implicitly thanks to __pycache__ (it was either this
or grow the SourceLoader ABC to gain an 'exists' method and either a mkdir
method or have set_data with no data arg mean to create a directory).

Lastly, as an optimization the file loaders cache the file path where the
finder found something to use for loading (this is thanks to having a
sourceless loader separate from the source loader to simplify the code and
cut out stat calls).
Unfortunately test_runpy assumed a loader would always work for a module, even
if you changed from underneath it what it was expected to work with. By simply
dropping the previous loader in test_runpy so the proper loader can be returned
by the finder fixed the failure.

At this point importlib deviates from import on two points:

1. The exception raised when trying to import a file is different (import does
an explicit file check to print a special message, importlib just says the path
cannot be imported as if it was just some module name).

2. the co_filename on a code object is not being set to where bytecode was
actually loaded from instead of where the marshalled code object originally
came from (a solution for this has already been agreed upon on python-dev but has
not been implemented yet; issue8611).

This required moving the class from importlib/abc.py into
importlib/_bootstrap.py and jiggering some code to work better with the class.
This included changing how the file finder worked to better meet import
semantics. This also led to fixing importlib to handle the empty string from
sys.path as import currently does (and making me wish we didn't support that
instead just required people to insert '.' instead to represent cwd).

It also required making the new set_data abstractmethod create
any needed subdirectories implicitly thanks to __pycache__ (it was either this
or grow the SourceLoader ABC to gain an 'exists' method and either a mkdir
method or have set_data with no data arg mean to create a directory).

Lastly, as an optimization the file loaders cache the file path where the
finder found something to use for loading (this is thanks to having a
sourceless loader separate from the source loader to simplify the code and
cut out stat calls).
Unfortunately test_runpy assumed a loader would always work for a module, even
if you changed from underneath it what it was expected to work with. By simply
dropping the previous loader in test_runpy so the proper loader can be returned
by the finder fixed the failure.

At this point importlib deviates from import on two points:

1. The exception raised when trying to import a file is different (import does
an explicit file check to print a special message, importlib just says the path
cannot be imported as if it was just some module name).

2. the co_filename on a code object is not being set to where bytecode was
actually loaded from instead of where the marshalled code object originally
came from (a solution for this has already been agreed upon on python-dev but has
not been implemented yet; issue8611).

descriptive comment into a docstring.  Cast attributes to int in
__init__.  Use __new__ instead of deleting attributes to
"uninitialize".

This required moving the class from importlib/abc.py into
importlib/_bootstrap.py and jiggering some code to work better with the class.
This included changing how the file finder worked to better meet import
semantics. This also led to fixing importlib to handle the empty string from
sys.path as import currently does (and making me wish we didn't support that
instead just required people to insert '.' instead to represent cwd).

It also required making the new set_data abstractmethod create
any needed subdirectories implicitly thanks to __pycache__ (it was either this
or grow the SourceLoader ABC to gain an 'exists' method and either a mkdir
method or have set_data with no data arg mean to create a directory).

Lastly, as an optimization the file loaders cache the file path where the
finder found something to use for loading (this is thanks to having a
sourceless loader separate from the source loader to simplify the code and
cut out stat calls).
Unfortunately test_runpy assumed a loader would always work for a module, even
if you changed from underneath it what it was expected to work with. By simply
dropping the previous loader in test_runpy so the proper loader can be returned
by the finder fixed the failure.

At this point importlib deviates from import on two points:

1. The exception raised when trying to import a file is different (import does
an explicit file check to print a special message, importlib just says the path
cannot be imported as if it was just some module name).

2. the co_filename on a code object is not being set to where bytecode was
actually loaded from instead of where the marshalled code object originally
came from (a solution for this has already been agreed upon on python-dev but has
not been implemented yet; issue8611).

Made minimal changes to make included test pass.

the command line.

(Extensive tests provided). Patch by Dan Mahn.

svn+ssh://pythondev@svn.python.org/python/branches/py3k/python/trunk

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82492 | victor.stinner | 2010-07-03 15:36:19 +0200 (sam., 03 juil. 2010) | 3 lines

  Issue #7673: Fix security vulnerability (CVE-2010-2089) in the audioop module,
  ensure that the input string length is a multiple of the frame size
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82483 | georg.brandl | 2010-07-03 12:25:54 +0200 (Sa, 03 Jul 2010) | 1 line

  Add link to bytecode docs.
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82474 | georg.brandl | 2010-07-03 10:40:13 +0200 (Sa, 03 Jul 2010) | 1 line

  Fix role name.
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82476 | mark.dickinson | 2010-07-03 10:15:09 +0100 (Sat, 03 Jul 2010) | 1 line

  Fix typo in sys.float_info docs.
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82466 | alexander.belopolsky | 2010-07-02 23:27:12 -0400 (Fri, 02 Jul 2010) | 1 line

  Revert r81681 (issue 8810).
........

face of a failure.

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82461 | benjamin.peterson | 2010-07-02 18:05:27 -0500 (Fri, 02 Jul 2010) | 1 line

  don't require the presence of __getformat__ or __setformat__; use requires_IEEE_754 globally
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82455 | eric.smith | 2010-07-03 00:44:16 +0300 (Sat, 03 Jul 2010) | 1 line

  Moved period outside paren, where it belongs.
........
  r82457 | ezio.melotti | 2010-07-03 01:17:29 +0300 (Sat, 03 Jul 2010) | 1 line

  #9139: Add examples for str.format().
........
  r82459 | ezio.melotti | 2010-07-03 01:50:39 +0300 (Sat, 03 Jul 2010) | 1 line

  #9139: the thousands separator is new in 2.7.  Also add a missing variable in the example.
........

reality it's simply an implementation detail for CPython. This point is now
clearly documented in both the docs for dis and the glossary.

Closes issue #7829. Thanks to Terry Reedy for some initial suggestions on
wording.

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82446 | mark.dickinson | 2010-07-02 19:06:52 +0100 (Fri, 02 Jul 2010) | 1 line

  Clarify sys.float_info documentation.
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82447 | benjamin.peterson | 2010-07-02 14:41:39 -0500 (Fri, 02 Jul 2010) | 1 line

  add space
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82441 | nick.coghlan | 2010-07-03 02:01:53 +1000 (Sat, 03 Jul 2010) | 1 line

  Issue 8202 actually caused an unintended behavioural change and was reverted in 2.7 - remove reference from What's New
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82439 | nick.coghlan | 2010-07-03 01:50:14 +1000 (Sat, 03 Jul 2010) | 1 line

  Fix a couple of minor nits in What's New before the release goes out
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82433 | georg.brandl | 2010-07-02 09:33:50 +0200 (Fr, 02 Jul 2010) | 1 line

  Grammar and markup fixes.
........

........
  r82429 | benjamin.peterson | 2010-07-01 18:35:37 -0500 (Thu, 01 Jul 2010) | 1 line

  trunc does use the special method, though
........

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r82420 | benjamin.peterson | 2010-07-01 12:45:52 -0500 (Thu, 01 Jul 2010) | 1 line

  fix fixer name
........