New submission from Lele Gaifax:
The documentation of namedtuple, near the end, talks about implementing
enumerated constants and says “Enumerated constants can be implemented with
named tuples, but it is simpler and more efficient to use a simple class
declaration“.
Maybe it should mention
Changes by Mark Lawrence breamore...@yahoo.co.uk:
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New submission from Antoine Pitrou:
Currently, test cases have no control over output and verbosity. I would
propose two possible enhancements:
- give the TestCase read access to the verbosity value (as e.g.
`self.verbosity`), to allow for conditional output in tests
- allow test methods to
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Changes by Saimadhav Heblikar saimadhavhebli...@gmail.com:
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New submission from Mark Dickinson:
I'm not sure it's worth fixing this, but it seems worth recording:
-0.5 // float('inf')
-1.0
I was expecting a value of `-0.0`, and while IEEE 754 doesn't cover the floor
division operation, I'm reasonably confident that that's the value it would
have
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Serhiy Storchaka added the comment:
Benchmark from issue22003:
$ ./python0 -m timeit -s 'import i' 'i.readlines()'
Before patch: 10 loops, best of 3: 36.1 msec per loop
After patch: 10 loops, best of 3: 27.5 msec per loop
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New submission from Jim Carroll:
On the page
https://docs.python.org/2/extending/embedding.html#compiling-and-linking-under-unix-like-systems
The documentation makes the following reference:
...(use sysconfig.get_makefile_filename() to find its location)...
But this is incorrect. sysconfig
Milan Oberkirch added the comment:
Thanks, for the review, here's comes an updated version.
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Steven D'Aprano added the comment:
On Thu, Aug 14, 2014 at 04:47:41PM +, Mark Dickinson wrote:
I'm not sure it's worth fixing this, but it seems worth recording:
-0.5 // float('inf')
-1.0
I was expecting a value of `-0.0`, and while IEEE 754 doesn't cover
the floor division
Roundup Robot added the comment:
New changeset b5114747d3ed by Serhiy Storchaka in branch '2.7':
Issue #22193: Added private function _PySys_GetSizeOf() needed to implement
http://hg.python.org/cpython/rev/b5114747d3ed
New changeset 46504edf7594 by Serhiy Storchaka in branch '3.4':
Issue
Roundup Robot added the comment:
New changeset 601045ceff94 by Serhiy Storchaka in branch 'default':
Issue #15381: Optimized line reading in io.BytesIO.
http://hg.python.org/cpython/rev/601045ceff94
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Serhiy Storchaka added the comment:
Thanks Martin.
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resolution: - fixed
stage: commit review - resolved
status: open - closed
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Tim Peters added the comment:
I'm OK with -1, but I don't get that or -0.0 on 32-bit Windows Py 3.4.1:
Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:38:22) [MSC v.1600 32 bit
(Intel)] on win32
Type copyright, credits or license() for more information.
-0.5 // float('inf')
nan
So maybe
Mark Dickinson added the comment:
Steven: there's a set of (unwritten) rules for how the IEEE 754 operations
work. (I think they actually *were* articulated explicitly in some of the 754r
drafts, but didn't make it into the final version.) One of them is that
ideally, a floating-point
Mark Dickinson added the comment:
[Tim]
-0.5 // float('inf')
nan
Urk! I wonder what's going on there. I think I like that answer even less
than -1.0.
IEEE 754's floor does indeed take -0.0 to -0.0.
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Serhiy Storchaka added the comment:
Updated patch without just committed line reading optimization and committed in
issue22193 the _PySys_GetSizeOf() function.
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Added file: http://bugs.python.org/file36371/bytesio_resized_bytes-5.patch
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Python
Antoine Pitrou added the comment:
Can you post any benchmark?
Also, if you wouldn't change the resizing factor it would make it easier to
compare the two approaches on their own merits, IMO.
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Serhiy Storchaka added the comment:
I posted benchmarks two years ago, in msg165795. Here are updated results:
$ ./python -m timeit -s import io; n=100; d=[b'a'*n,b'bb'*n,b'ccc'*n]*1
s=io.BytesIO(); w=s.write for x in d: w(x) s.getvalue()
Before patch: 10 loops, best of 3: 42.3 msec
Christian Heimes added the comment:
The code is missing an overflow check. There should be some verification that
__sizeof__ returns a value smaller than SIZE_T_MAX - 24. Also 24 for GC
overhead looks strange. IMHO it should be sizeof(PyGC_Head) which can be
smaller than 24 bytes.
Python
New submission from Thomas Kluyver:
We noticed the other day that distutils, despite being part of the standard
library, checks the version of Python it's running under and has some different
code paths - one of which is only taken for Python 2.2.
We haven't managed to figure out why this is
Changes by Ismail Badawi ism...@badawi.io:
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Ned Deily added the comment:
Thanks for the report. After reviewing the situation, I think this is actually
a code bug rather than a documentation issue; in other words, things should
work like the embedding documentation states.
sysconfig has a complicated history; there are currently 6
Lita Cho added the comment:
pinging for another review. I have included tests for the patch as well as
documentation!
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Lita Cho added the comment:
ping!
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Vinay Sajip added the comment:
This is easy enough to do, I posted about it in 2009 here:
http://plumberjack.blogspot.co.uk/2009/09/how-to-treat-logger-like-output-stream.html
Basically, something like
class LoggerWriter(object):
def __init__(self, logger, level):
self.logger =
New submission from Antony Lee:
With Python 3.4.1:
$ mkdir foo; zip -r foo{,}; python -mzipfile -e foo.zip dest
adding: foo/ (stored 0%)
Traceback (most recent call last):
File /usr/lib/python3.4/runpy.py, line 170, in _run_module_as_main
__main__, mod_spec)
File
Changes by Aaron Meurer asmeu...@gmail.com:
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Steven D'Aprano added the comment:
Thank you for the extensive examples, but I'm afraid this is not a bug.
In your code, result is a local variable, which means it only exists inside
the fib() function. When you try inspecting result, it fails because there is
no global variable result.
Try
Changes by Steven D'Aprano steve+pyt...@pearwood.info:
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Roundup Robot added the comment:
New changeset 6d41f139709b by Terry Jan Reedy in branch '2.7':
Issue #17390: Adjust Editor window title. Remove 'Python', move version to end.
http://hg.python.org/cpython/rev/6d41f139709b
New changeset ba141f9e58b6 by Terry Jan Reedy in branch '3.4':
Issue
Changes by Terry J. Reedy tjre...@udel.edu:
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stage: test needed - resolved
status: open - closed
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Antoine Pitrou added the comment:
This is easy enough to do, I posted about it in 2009 here
I know it's easy. It's still annoying to have to write such boilerplate by hand
(especially when everyone ends up rewriting the exact same one).
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Terry J. Reedy added the comment:
I am working on backporting the #10291 patch and re-synchronizing 3.4 and 3.5
so revised version of this patch, including help change, and of #22065 patch
can merge forward properly.
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Roundup Robot added the comment:
New changeset 7708f80940b0 by Terry Jan Reedy in branch '3.4':
Issue #10291: Backport 004fe3449193 with a few changes due to 22095.
http://hg.python.org/cpython/rev/7708f80940b0
New changeset 68902ee48985 by Terry Jan Reedy in branch 'default':
Issue #10291:
Roundup Robot added the comment:
New changeset 4349bbc21ca7 by Terry Jan Reedy in branch 'default':
Issue #22065: forward port the changes in c26862955342, update docstring with
http://hg.python.org/cpython/rev/4349bbc21ca7
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Roundup Robot added the comment:
New changeset 59cc3bfdac4b by Terry Jan Reedy in branch 'default':
Issue #22065: Try the delete demohelp.txt part again.
http://hg.python.org/cpython/rev/59cc3bfdac4b
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Changes by Terry J. Reedy tjre...@udel.edu:
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Terry J. Reedy added the comment:
After backporting 004fe3449193 (#10921 3.5 patch) with changes as 7708f80940b0,
forward port to 3.5 the 3.4 patch c26862955342 that did not merge before. The
3.4 and 3.5 files are identical.
Misdirected changeset notices:
New changeset 4349bbc21ca7 by Terry
Changes by Terry J. Reedy tjre...@udel.edu:
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Terry J. Reedy added the comment:
The two misdirected and unlinked changeset notices belong to #22053.
(Not completely off, as they synchronize 3.4 and 3.5 so I can start work on
this.)
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Roundup Robot added the comment:
New changeset 5aa3f4863dda by Terry Jan Reedy in branch '3.4':
#22053: actually remove .txt files from 3.4.
http://hg.python.org/cpython/rev/5aa3f4863dda
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Raymond Hettinger added the comment:
This is a recurring problem. I concur with Antoine that there needs to be
logging functions that are harmonized with print().
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New submission from Alexander Schepanovski:
inspect.getargspec() returns empty ArgSpec for map() and filter():
import inspect
inspect.getargspec(map)
ArgSpec(args=[], varargs=None, keywords=None, defaults=None)
inspect.getargspec(filter)
ArgSpec(args=[], varargs=None,
Roundup Robot added the comment:
New changeset 39c67beb483a by Terry Jan Reedy in branch '3.4':
Issue #22065: Update turtledemo menu creation; don't use obsolete Menubutton.
http://hg.python.org/cpython/rev/39c67beb483a
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Raymond Hettinger added the comment:
ideally, a floating-point operations works as though the
corresponding mathematical operation were performed exactly
on the inputs (considered as real numbers), followed by a rounding
step that takes the resulting real number and rounds it to the
Serhiy Storchaka added the comment:
This was discussed in issue15490. Such implementation is just incorrect,
because we cannot allocate such much memory.
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Terry J. Reedy added the comment:
The changes to help menu creation in #22053 required hand patching of the last
chunk, but that was pretty easy. The code definitely looks better for the
change.
After pushing, I compared the look to 2.7. The first letters are not
underlined, but Alt-first
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