Tk.framework and build _tkinter only for those
architectures.

This replaces the hardcoded solution that is no
longer valid now that 64-bit capable versions of
Tk are available on OSX.

Test discovery in unittest will only attempt to import modules that are importable; i.e. their names are valid Python identifiers. If an import fails during discovery this will be recorded as an error and test discovery will continue. Issue 6568.

Note that sys._getframe is not guaranteed to exist in all implementations of Python, and a corresponding note in inspect.currentframe. Issue 6712.

Objects that compare equal automatically pass or fail assertAlmostEqual and assertNotAlmostEqual tests on unittest.TestCase. Issue 6567.

a couple of whitespace issues.

The filter argument must be a function that takes a TarInfo
object argument, changes it and returns it again. If the
function returns None the TarInfo object will be excluded
from the archive.
The exclude argument is deprecated from now on, because it
does something similar but is not as flexible.

formatting:  both are now right-aligned by default.

This patch has already been backported as part of the backport of r74701,
which is how I found this problem.

#Issue 6795:  Fix infinite recursion in long(Decimal('nan'));  change int(Decimal('nan')) to raise ValueError instead of either returning NaN or raising InvalidContext.

with no type specifier.

instead of [0, 256).  Thanks Hagen Fürstenau for the report and fix.