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PEP 285. Everything described in the PEP is here, and there is even
some documentation. I had to fix 12 unit tests; all but one of these
were printing Boolean outcomes that changed from 0/1 to False/True.
(The exception is test_unicode.py, which did a type(x) == type(y)
style comparison. I could've fixed that with a single line using
issubtype(x, type(y)), but instead chose to be explicit about those
places where a bool is expected.
Still to do: perhaps more documentation; change standard library
modules to return False/True from predicates.
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Bugfix candidate? Don't know -- never bothered me, but it's minor
either way.
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Repair unlikely surprise due to magical softspace attr and the use of
print with a trailing comma in doctest examples.
Bugfix candidate.
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Taught doctest about static methods, class methods, and property docstrings
in new-style classes. As for inspect.py/pydoc.py before it, the new stuff
needed didn't really fit into the old architecture (but was less of a
strain to force-fit here).
New-style class docstrings still aren't found, but that's the subject
of a different bug and I want to fix that right instead of hacking around
it in doctest.
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Another installment; the new functionality wasn't actually enabled in
normal use, only in the strained use checked by the test case.
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from Tim Hochberg. Also mucho fiddling to change the way doctest
determines whether a thing is a function, module or class. Under 2.2,
this really requires the functions in inspect.py (e.g., types.ClassType
is close to meaningless now, if not outright misleading).
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somewhat less horrid hack <wink>: if a module does
from __future__ import X
then the module dict D is left in a state such that (viewing X as a
string)
D[X] is getattr(__future__, X)
So by examining D for all the names of future features, and making that
test for each, we can make a darned good guess as to which future-features
were imported by the module. The appropriate flags are then sucked out
of the __future__ module, and passed on to compile()'s new optional
arguments (PEP 264).
Also gave doctest a meaningful __all__, removed the history of changes
(CVS serves that purpose now), and removed the __version__ vrbl (similarly;
before CVS, it was a reasonable clue, but not anymore).
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that 'yield' is a keyword. This doesn't help test_generators at all! I
don't know why not. These things do work now (and didn't before this
patch):
1. "from __future__ import generators" now works in a native shell.
2. Similarly "python -i xxx.py" now has generators enabled in the
shell if xxx.py had them enabled.
3. This program (which was my doctest proxy) works fine:
from __future__ import generators
source = """\
def f():
yield 1
"""
exec compile(source, "", "single") in globals()
print type(f())
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clearing a shallow copy _run_examples() makes itself can't hurt anything.
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break cycles, which are a special problem when running generator tests
that provoke exceptions by invoking the .next() method of a named
generator-iterator: then the iterator is named in globs, and the
iterator's frame gets a tracekback object pointing back to globs, and
gc doesn't chase these types so the cycle leaks.
Also changed _run_examples() to make a copy of globs itself, so its
callers (direct and indirect) don't have to (and changed the callers
to stop making their own copies); *that* much is a change I've been
meaning to make for a long time (it's more robust the new way).
Here's a way to provoke the symptom without doctest; it leaks at a
prodigious rate; if the last two "source" lines are replaced with
g().next()
the iterator isn't named and then there's no leak:
source = """\
def g():
yield 1/0
k = g()
k.next()
"""
code = compile(source, "<source>", "exec")
def f(globs):
try:
exec code in globs
except ZeroDivisionError:
pass
while 1:
f(globals().copy())
After this change, running test_generators in an infinite loop still leaks,
but reduced from a flood to a trickle.
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example (an obvious trackback cycle). Repaired.
Bugfix candidate.
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because it picks up the first line of traceback.format_exception_only()
instead of the last line. Pick up the last line instead!
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This makes verbose-mode output easier to dig thru, and removes an accidental
dependence on the order of dict.items() (made visible by recent changes to
dictobject.c).
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from the last failure report.
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newline at the end if there isn't one already. Expected output has no
way to indicate that a trailing newline was not expected, and in the
interpreter shell *Python* supplies the trailing newline before printing
the next prompt.
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<wink>.
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