__loader__.
Since import now sets __loader__ on all modules it creates and
imp.reload() already relied on the attribute for modules that import
didn't create, the only potential compatibility issue is if people
were deleting the attribute on modules and expecting imp.reload() to
continue to work.
rewriting functionality in pure Python.
To start, imp.new_module() has been rewritten in pure Python, put into
importlib (privately) and then publicly exposed in imp.
of sys.modules when possible.
This is being done for two reasons. One is to gain a little bit of
performance by skipping an unnecessary dict lookup in sys.modules. But
the other (and main) reason is to be a little bit more clear in how
things should work from the perspective of import's interactions with
loaders. Otherwise loaders can easily forget to return the module even
though PEP 302 explicitly states they are expected to return the module
they loaded.
importlib._bootstrap is now frozen into Python/importlib.h and stored
as _frozen_importlib in sys.modules. Py_Initialize() loads the frozen
code along with sys and imp and then uses _frozen_importlib._install()
to set builtins.__import__() w/ _frozen_importlib.__import__().
Currently import does not use these attributes as they are planned
for use by importlib (which will be another commit).
Thanks to Filip Gruszczyński for the initial patch and Brian Curtin
for refining it.
Patch by Serhiy Storchaka.
This also moves the TypeError that results from trying to use a unicode
comment from the 'close' step to the point at which the comment is added to
the zipfile.
Patch by Serhiy Storchaka.
This also moves the TypeError that results from trying to use a unicode
comment from the 'close' step to the point at which the comment is added to
the zipfile.
This moves us further in the direction of using normal unittest facilities
instead of specialized regrtest ones. Any test module that can be correctly
run currently using 'python unittest -m test.test_xxx' can now be converted to
use normal unittest test loading by simply deleting its test_main, thus no
longer requiring manual maintenance of the list of tests to run. (Not all
tests can be converted that easily, since test_main sometimes does some
additional things (such as reap_children or reap_threads). In those cases the
extra code may be moved to setUpModule/tearDownModule methods, or perhaps the
same ends can be achieved in a different way, such as moving the decorators to
the test classes that need them, etc.)
I don't advocate going through and making this change wholesale, but any time
a list of tests in test_main would otherwise need to be updated, consideration
should instead be given to deleting test_main.
Previously mailbox was copying a list of attributes from one message object to
another in order to "copy the message data". This means that any time new
attributes were added to email.message.Message, mailbox broke. Now instead it
copies all attributes from the source object to the target object, skipping
any mailbox-object-specific attributes to produce the same clean initial
state it was previously getting by copying only the "known" attributes.
David Lam assisted in the development of this patch.
Antoine Pitrou
Benjamin Peterson
Brett Cannon
Charles-François Natali
Vinay Sajip
Brian Curtin
Victor Stinner
Mark Dickinson
Kristján Valur Jónsson
R David Murray
Georg Brandl
Stefan Krah
Ross Lagerwall
Andrew Svetlov