suggestion from Guido, along with a formal correctness proof of the
trickiest bit. The intricacy of the proof reveals how delicate this
is, but also how robust the conclusion: correctness doesn't rely on
dst() returning +- one hour (not all real time zones do!), it only
relies on:
1. That dst() returns a (any) non-zero value if and only if daylight
time is in effect.
and
2. That the tzinfo subclass implements a consistent notion of time zone.
The meaning of "consistent" was a hidden assumption, which is now an
explicit requirement in the docs. Alas, it's an unverifiable (by the
datetime implementation) requirement, but so it goes.
understood now: it can't work. Added comments explaining why (it's "the
usual"-- unrepresentable hours in local time --but in a slightly different
guise).
Remove broken code in visitDict(). I assume the code was trying to
add set lineno events for each line of a dict constructor, but I think
it was using the wrong object (node instead of k or v).
A variety of changes from Michael Hudson to get the compiler working
with 2.3. The primary change is the handling of SET_LINENO:
# The set_lineno() function and the explicit emit() calls for
# SET_LINENO below are only used to generate the line number table.
# As of Python 2.3, the interpreter does not have a SET_LINENO
# instruction. pyassem treats SET_LINENO opcodes as a special case.
A few other small changes:
- Remove unused code from pycodegen and pyassem.
- Fix error handling in parsermodule. When PyParser_SimplerParseString()
fails, it sets an exception with detailed info. The parsermodule
was clobbering that exception and replacing it was a generic
"could not parse string" exception. Keep the original exception.
an idea from Guido. This restores that the datetime implementation
never passes a datetime d to a tzinfo method unless d.tzinfo is the
tzinfo instance whose method is being called. That in turn allows
enormous simplifications in user-written tzinfo classes (see the Python
sandbox US.py and EU.py for fully fleshed-out examples).
d.astimezone(tz) also raises ValueError now if d lands in the one hour
of the year that can't be expressed in tz (this can happen iff tz models
both standard and daylight time). That it used to return a nonsense
result always ate at me, and it turned out that it seemed impossible to
force a consistent nonsense result under the new implementation (which
doesn't know anything about how tzinfo classes implement their methods --
it can only infer properties indirectly). Guido doesn't like this --
expect it to change.
New tests of conversion between adjacent DST-aware timezones don't pass
yet, and are commented out.
Running the datetime tests in a loop under a debug build leaks 9
references per test run, but I don't believe the datetime code is the
cause (it didn't leak the last time I changed the C code, and the leak
is the same if I disable all the tests that invoke the only function
that changed here). I'll pursue that next.
any_missing() returns less bogus missing modules.
- I've rewritten scan_code() more or less from scratch,
factored bits and pieces out for readability.
- keep track of global assignments and failed imports per
module; use this to determine whether the Y in "from X
import Y" is a submodule or just a global name. This is not
100% doable: you can't tell which symbols are imported when
doing a star import of a non-Python module short of actually
importing it.
- added a new method to ModuleFinder: any_missing_maybe(),
which returns *two* lists, one with certain misses, one with
possible misses. The possible misses are *very* often false
alarms, so it's useful to keep this list separate.
any_misses() now simply returns the union of
any_missing_maybe().
TODO: documentation, test_modulefinder.py
Pass the right number of args to .format(). (Caught by
pychecker.)
- Protect the global namespace more carefully.
- Don't use the types module now that we don't need to.
InterpolationError constructor, not the KeyError exception itself.
(Caught by the new InterpolationError test.)
SafeConfigParser._interpolate_some(): Pass the right number of
arguments to the InterpolationError constructor.
(Caught by pychecker.)
- new import hooks in import.c, exposed in the sys module
- new module called 'zipimport'
- various changes to allow bootstrapping from zip files
I hope I didn't break the Windows build (or anything else for that
matter), but then again, it's been sitting on sf long enough...
Regarding the latest discussions on python-dev: zipimport sets
pkg.__path__ as specified in PEP 273, and likewise, sys.path item such as
/path/to/Archive.zip/subdir/ are supported again.
in MacPython-OS9 and MacPython-OSX (or the equivalent unix Python on
Mac OS X). The only items remaining in Mac/Lib are modules that are
meaningful only for MacPython-OS9 (CFM stuff, MacPython preferences
in resources, etc).
of the timetz case. A tzinfo method will always see a datetimetz arg,
or None, now. In the former case, it's still possible that it will get
a datetimetz argument belonging to a different timezone. That will get
fixed next.
is passed straight through to the unicode() and ustr.encode() calls.
I think it's the best we can do to address the UnicodeErrors in badly
encoded headers such as is described in SF bug #648119.
file, needed because some binary distros (read RPMs) don't include the
test module in their standard Python package. This eliminates an
external dependency and closes SF bug # 650441.
binary distros (read RPMs) don't include the test module in their
standard Python package. This eliminates an external dependency and
closes SF bug # 650441.
ignore tuple.
The line, "from _random import Random as CoreGenerator", fools the test
code which expects CoreGenerator.__name__ to be "CoreGenerator" instead
of "Random".
Guido has in mind an easier way for users to code this stuff, but the
only tests we have now are for fixed-offset tzinfo classes, and this
stuff is extremely delicate in the endcases (read the new test code
for why: there are holes in time <wink>).
M PyShell.py
1. PyShell Rev 1.39, EditorWindow Rev 1.37 fix was not handling a
multiline prompt.
2. The same fix introduced a bug where hitting <enter> at a previous
prompt-only line would copy the prompt to the iomark.
3. Move the setting of sys.ps1 earlier, into PyShell.main(), to allow
this code to work before a shell is started up.
4. If cursor is on the input line in the prompt, and you hit <enter>,
process the line instead of complaining.
5. If line has no stdin range (this includes the last line before shell
restart) strip any prompt before recalling.
equality. Note, there is another flavor that compares to a given
number of significant digits rather than decimal places. If there
is a demand, that could be added at a later date.
operands have identical tzinfo members (meaning object identity -- "is").
I misunderstood the intent here, reading wrong conclusion into
conflicting clues.
subtraction, work as documented. In the Python implementation,
they weren't calling utcoffset() if both operands had the same
tzinfo object. That's fine if it so happens that the shared
tzinfo object returns a fixed offset (independent of operand),
but can give wrong results if that's not so, and the latter
obtains in a tzinfo subclass instance trying to model both
standard and daylight times. The C implementation was already
doing this "correctly", so we're just adding tests to verify it.
module.
The code is shorter, more readable, faster, and dramatically increases the
range of acceptable dates.
Also, used the floor division operator in leapdays().
M idle
M idle.py
M idle.pyw
M setup.py
Switch back to installing IDLE as a package. The IDLE GUI and the
subprocess will both attempt to start up via the package mechanism, but if
IDLE is not yet installed it is possible to run by calling python idle.py
in the IDLE source directory, or to add the source directory to sys.path.
One advantage of doing it this way is IDLE stays off sys.path.
Developed in collaboration with Tony Lownds.
Tim Peters
Neal Norwitz
Martin v. Löwis
Kurt B. Kaiser
Barry Warsaw
Jeremy Hylton
Tony Lownds
Fred Drake
Just van Rossum
Andrew MacIntyre
Guido van Rossum
Jack Jansen
Neil Schemenauer
Marc-André Lemburg
Raymond Hettinger
Andrew M. Kuchling