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Aaron Meurer added the comment:
I'm surprised to hear that the "typical use-case" of Fraction is fractions
converted from floats. Do you have evidence in the wild to support that?
I would expect any application that uses fractions "generically" to run into
the sam
Aaron Black added the comment:
joseph.hackman
I don't think that the 63 character limit on a label is the problem
specifically, merely it's application.
The crux of my issue was that credentials passed with the url in a basic-authy
fashion (as some services require) count a
New submission from Aaron Lichtman :
It would be useful if the http.server module had an option for colored logging
to help users visually parse the HTTP traffic logs.
$ python3 -m http.server 80 --color is along the lines of what I'm thinking.
--
components: Library (Lib)
mes
New submission from Aaron Meurer :
This discussion started at https://github.com/python/cpython/pull/19503
(actually on Twitter https://twitter.com/asmeurer/status/1289304407696261120),
but Guido asked me to move it bpo.
Alongside the implementation of Python 3.9's new PEG parser,
Aaron Meurer added the comment:
The same thing occurs with specifiers like {a!r}.
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Aaron Meurer added the comment:
> It's not entirely clear to me what you are trying to do (what is the output
> you are hoping to get?) but this looks more like a question than a bug
> report, so I am closing this issue. If this is still relevant, I'd suggest
> you a
Aaron Meurer added the comment:
I think I found another way to achieve what I was trying to do, which is why I
never pursued this. But I still think it's a bug.
__traceback__ = None isn't documented anywhere that I could find, so I was only
able to deduce how it should work from r
Aaron Meurer added the comment:
I don't think it's helpful to make such a literalistic interpretation. Just
because the variable is called "traceback" doesn't mean it should apply only to
the things that are *technically* a traceback (and I don't agree anyway
Aaron Meurer added the comment:
Neither of those things preclude the possibility of the traceback module doing
a better job of printing tracebacks for exceptions where __traceback__ = None.
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New submission from Aaron Staley :
Am frequently getting segmentation faults with my python program. I am
utilizing heavy use of threading and sockets.
All sorts of ones are showing in syslog:
kernel: [7763578.475590] python[10097]: segfault at 88e5a0 ip 0088e5a0
sp 7f640efd4028
Aaron Staley added the comment:
For some more context:
Python 2.7.2
Running on Amazon EC2
Linux 3.0.0-14-virtual x86_64 in ubuntu 11.10
170 threads in this particular core dump (another similar crash has 135)
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Aaron Staley added the comment:
Active extension modules are MySQL-python, numpy, and crypto.
Here is the output from the non-optimized debug build. Slightly different
trace, but still some sort of deallocator crashing AFAIK:
#0 0x0046247c in _Py_ForgetReference (op=
, _pipe
Aaron Staley added the comment:
As far as I can tell, no other thread is active. Their backtraces are all
either:
#0 0x7f283dedd300 in sem_wait () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00519295 in PyThread_acquire_lock (lock=0xe7dd50, waitflag=1) at
Python
Aaron Staley added the comment:
I should note that my program is also affected by this bug:
http://bugs.python.org/issue13817
(couldn't isolate it until I used the pydebug configure info).
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Aaron Staley added the comment:
Used latest mercurial 2.7 branch and segfault still occurs.
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Aaron Staley added the comment:
Also, the only particular things by code does is have a lot of threads (100+),
holds open many ssh connections (with paramiko) and I do occasionally use
PyThreadState_SetAsyncExc to asynchronously terminate threads
Aaron Staley added the comment:
Unfortunately, my application is running so slow under valgrind that behavior
is changing, namely the sockets are all timing out.
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Aaron Staley added the comment:
I see no invalid read/write. Only warnings are some conditional jump depends on
uninitialized value in pycrypto's libraries very early on though.
The link seems to be a different bug from mine. I did test in python 2.6.7 and
the crash still occurs. (I
Aaron Staley added the comment:
BTW, I take back what I said about using PyThreadState_SetAsyncExc. Turns out
I had a bug where this function would never succeed (was always returning 0).
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New submission from Aaron Meurer :
Recently, after a small seemingly unrelated refactoring, the SymPy test suite
in Python 3 started dying with "Fatal Python error: Cannot recover from stack
overflow."
Here's how to reproduce the error
git clone git://github.com/sympy/sympy.
Aaron Meurer added the comment:
We do have a stack overflow, but this should be raising a RuntimeError, not
killing Python. The way it is now, Python dies completely with abort trap 6
(hence the Mac OS X problem report). Sorry if I didn't make this clear in th
Aaron Meurer added the comment:
No it does not. SymPy is a pure Python library.
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Python-bug
New submission from Aaron Staley :
The json library's encoder includes a function called 'iterencode'. iterencode
allows for encoding to be streamed; as tokens are produced they are yielded.
This allows for the encoded object to be streamed to a file, over a socket,
etc. witho
Aaron Meurer added the comment:
I agree with Raymond that third party libraries are not ready for this.
My biggest issue is that the way Python warns about this makes it very
difficult for library authors to fix this. Most won't even notice. The problem
is the warnings are only shown
Aaron Hurst added the comment:
I believe this bug can be closed now that the following have landed:
New changeset 408a2ef1aceff1f4270c44552fa39ef93d9283e3 by Benjamin Peterson
(aaronpaulhurst) in branch 'master':
closes bpo-35184: Fix XML_POOR_ENTROPY option that breaks makesetup
Aaron Meurer added the comment:
I agree. Please someone else do that. I don't know what already has issues and
I unfortunately don't have time right now to help out with any of this.
I simply mentioned all these things as arguments why Python should not (yet)
make these warni
Aaron Meurer added the comment:
This looks like the same issue I mentioned here
https://bugs.python.org/msg344764
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Aaron Meurer added the comment:
Raymond, are you in agreement that these warnings should at some point
eventually become syntax errors?
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Python tracker
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Aaron Meurer added the comment:
Well paradoxically, the bugs that this prevents are the ones it doesn't warn
about. If someone writes '\tan(x)' thinking it is a string representing a LaTeX
formula for the tangent of x, they won't realize that they actually created a
st
Aaron Meurer added the comment:
This seems related. It's also possible I'm misunderstanding what is supposed to
happen here.
If you create test.py with just the 2 lines:
"""
a
and run python test.py from CPython master, you get
$./python.exe test.py
File &quo
Aaron Meurer added the comment:
Are there issues tracking the things I mentioned, which should IMO happen
before this becomes a hard error (making the warnings reproduce even if the
file has already been compiled, and making warning message point to the correct
line in multiline strings
Aaron Hall added the comment:
It seems that this issue is still properly open. (Another open issue seems be
related: http://bugs.python.org/issue30129)
In the docs on partial, we have:
>>> from functools import partial
>>> basetwo = partial(int, base=2)
>>> basetw
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Aaron Hall added the comment:
Serhiy,
Not sure what else needs to be done to wrap this up. All checks are passing on
the pull request.
Thoughts?
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Aaron Hall added the comment:
I like this idea too, but perhaps it should just be a multi-column bulleted
list (under the -m flag at
https://docs.python.org/3/using/cmdline.html#interface-options) with links to
the respective Standard Library doc?
Then we just ensure the documentation for
New submission from Aaron Michaux:
The file "Misc/valgrind-python.supp" doesn't work on Linux x64, running
Python3.5.2, when configured as such:
--with-pydebug --with-valgrind --without-pymalloc
Running the interpreter
echo "x = 1; print(x)" | valgrind --tool=m
Aaron Meurer added the comment:
Is it expected behavior that comments produce NEWLINE if they don't have a
newline and don't produce NEWLINE if they do (that is, '# comment' produces
NEWLINE but '# comment\n' does not
Aaron Meurer added the comment:
You can download the branch for a pull request even if the repo is deleted
using this https://stackoverflow.com/a/28622034/161801. That will let you keep
the original commits intact.
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Aaron Whitehouse added the comment:
Posted to the [Python-ideas] mailing list, as it is proposing a change to a
standard library:
https://mail.python.org/pipermail/python-ideas/2017-February/044880.html
Nobody has responded so far, however. I take this as at least no vehement
objection to the
New submission from Aaron Meurer:
I'm trying to completely hide an exception from the traceback module. From
reading the source, it looks like the only way to do this is to set
__traceback__ to None (I can also set __suppress_context__ to True, but that
only works if I have another exce
New submission from Aaron Hall:
The __slots__ documentation in the datamodel needs improvement.
For example:
> When inheriting from a class without __slots__, the __dict__ attribute of
> that class will always be accessible, so a __slots__ definition in the
> subclass is meaningl
Aaron Hall added the comment:
I've been working on this section quite a lot, trying to improve the flow of
content (which in the prior revision is a bit of a mish-mash of information in
the "Notes on using __slots__ section") - I intend to move some of that
information into
New submission from Aaron Hall:
We have __slots__ with other ABC's, see http://bugs.python.org/issue11333 and
http://bugs.python.org/issue21421.
There are no downsides to having empty slots on a non-instantiable class, but
it does give the option of denying __dict__ creation for subcla
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Aaron Hall added the comment:
I created a new PR based on rhettinger's feedback (which on consideration was
quite correct) with a fresh branch from master.
Terseness is retained, and I think this revision makes the documentation more
correct and complete. The rewording makes the beh
Changes by Aaron Hall :
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Aaron Hall added the comment:
Bumping this - I intend to work on this next, if no objections.
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Aaron Hall added the comment:
Added news, working on tests
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Aaron Hall added the comment:
> Please also add yourself to Misc/ACKS.
Done!
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Aaron Hall added the comment:
I tweaked the docs a little more this morning, but I believe I am done making
any further changes unless so requested.
This issue doesn't say it's assigned to anyone. Is there anything else that
needs to h
New submission from Aaron Meurer :
I am getting a Fatal Python error: Cannot recover from stack overflow. running
the SymPy tests on a branch of mine where the tests fail. I have reproduced
this in Python 3.6.7, as well as CPython master
(fc96e5474a7bda1c5dec66420e4467fc9f7ca968).
Here are
Change by Aaron Hall :
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Aaron Hall added the comment:
No need to keep this open, I agree with the core developers this shouldn't be
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Change by Aaron Hurst :
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pull_requests: +12827
stage: -> patch review
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Aaron Hurst added the comment:
I can reproduce this issue by uncommenting the pyexpat line in Setup.dist and
compiling.
The issue is with -DXML_POOR_ENTROPY=1. The equals character causes the line
to be incorrectly interpreted as a macro definition by makesetup. This results
in an
Aaron Hurst added the comment:
This is the same issue as https://bugs.python.org/issue35184
I can reproduce this issue by uncommenting the pyexpat line in Setup.dist and
compiling.
The issue is with -DXML_POOR_ENTROPY=1. The equals character causes the line
to be incorrectly interpreted
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Aaron Hurst added the comment:
Sorry for my misunderstanding of the process, and thanks for explaining. I
resubmitted the PR against the master branch.
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Aaron Hurst added the comment:
Hi Ned,
>From a fresh checkout of master on Ubuntu 18.04, I uncomment the pyexpat line
>in Modules/Setup and run:
cpython$ ./configure
...
cpython$ make
Makefile:273: *** missing separator. Stop.
Here is the offending section of the resulting Makefile
Aaron Hurst added the comment:
Hi Ned,
Thanks for testing this. I also observe that macOS compiles "without error"...
but it's still broken... and silently.
This is because the pyexpat line isn't being turned into the expected set of
source compilation rules, but
Change by Aaron Hall :
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New submission from Aaron Hall :
I've written three (or more) answers on Stack Overflow about how to use the
functions in the traceback module, and I code Python all day long.
Embarrassing confession: I just recommended the wrong traceback function in
email to fix the incorrect usa
New submission from Aaron Black :
While working on a custom conda channel with authentication, I ran into the
following UnicodeError:
Traceback (most recent call last):
File
"/Users/ablack/miniconda3/lib/python3.6/site-packages/conda/core/repodata.py",
li
New submission from Aaron Christianson :
I'm always writting these wrapper classes where I want to selectively want to
expose the interface of some of the methods of certain attributes to co the
containing object. This can mean I spend a lot of time implementing wrapper
methods. That
Aaron Black added the comment:
Just to be clear, I don't know if the socket needs to support 64 character long
host name sections, so here's an example url that is at the root of my problem
that I'm pretty sure it should support:
>>
Change by Aaron Ang :
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pull_requests: +5952
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Change by Aaron Ang :
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pull_requests: +6119
stage: needs patch -> patch review
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_
Aaron Ang added the comment:
I couldn't reproduce this issue. I tried reproducing this problem by extending
the TestRefactoringTool class and creating two files: one file with LF
line-endings and one file with CRLF line-endings.
The changes that I made can be found here:
https://githu
Change by Aaron Ang :
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pull_requests: +6181
stage: test needed -> patch review
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Aaron Ang added the comment:
@Jason R. Coombs
You are right. I managed to reproduce the problem with a test. It only occurs
when a fix is applied.
Also, I figured out that the refactoring reads in the file using `open(file,
'r')`, which basically transforms all line-endings to LF
New submission from Aaron Hall :
pathlib.Path wants the rmtree method from shutil
I think we need this method for a couple of reasons.
1. in shell, rm has the -r flag - In Python, we use shutil.rmtree as a best
practice for this.
2. I prefer to teach my students about pathlib.Path as opposed
Aaron Hall added the comment:
> What is wrong with just using shutil.rmtree()?
0. It's awkward to import just for demonstrations.
1. It's harder for new pythonists to discover.
2. A method provides discoverability in an object's namespace.
3. rmtree is a method of paths
New submission from Aaron Meurer :
>>> '{:+.19e}'.format(0.)
'+0.000e+00'
>>> import decimal
>>> '{:+.19e}'.format(decimal.Decimal(0))
'+0.000e+19'
Note the decimal uses e+19 instead of e+00. Obvi
Aaron Meurer added the comment:
I guess I would expect that to be captured by the number of zeros printed (and
obviously doing a string format operation with a set number of digits destroys
that information).
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<ht
Aaron Meurer added the comment:
I meant that format() destroys information in a decimal in general. Obviously
if you have n digits of precision and format with m < n, then you lose
information.
I also can't help but feel that we're mixing up "trailing zeros"
New submission from Aaron Hall :
Removing the closure seems to make the function about 10% faster.
Original source code at:
https://github.com/python/cpython/blob/3.6/Lib/ast.py#L40
Empirical evidence: astle.py
import timeit
from ast import literal_eval as orig_literal_eval
from ast import
Aaron Hall added the comment:
Rejecting and withdrawing with apologies.
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Aaron Hall added the comment:
So... moving the closure (which may be called recursively) to the global scope
actually does improve performance (for small cases, about 10% - larger cases
amortize the cost of the closure being built, but in a 100 item dictionary,
still about 4% faster to
Aaron Gallagher <_...@habnab.it> added the comment:
>Storing the marker attribute in __main__ [...]
Can I request please not using __main__ for this? setuptools console_scripts
are very common, which is a case where __main__ will be a generated (i.e. not
user-controllable) fil
Aaron Hall added the comment:
Static analysis:
My mental model currently says the rebuilt function every outer call is an
expense with no offsetting benefit. It seems that a function shouldn't build a
closure on every call if the closure doesn't close over anything immediately
u
Aaron Hall added the comment:
New information: I think I have pinpointed at least a contributor to the
difference - closure lookups seem to be currently slightly slower (by a few
percent) than global lookups (see https://stackoverflow.com/a/46798876/541136).
And as we can see, an inner
Aaron Hall added the comment:
If/when order is guaranteed (3.7?) we should have a pprint that respects
current order,
-or-
we should get an improved pprint (maybe named pp or print?) that understands
mappings and other abstract data types.
I had a conversation about pprint at the Python
New submission from Aaron Meurer :
Here are the steps to reproduce this:
- Compile and link Python against readline version 7.0 or higher.
- Add
set enable-bracketed-paste on
to your ~/.inputrc
- Start python and paste the following two lines. Make sure to use a terminal
emulator that
Aaron Meurer added the comment:
If it's of any interest to this discussion, for SymPy (for some time) we have
used a custom subclass of DeprecationWarning that we enable by default
https://github.com/sympy/sympy/blob/master/sympy/utilities/exceptions.py. I
don't know if there
New submission from Aaron Meurer :
Take the following scenario which happened to me recently. I am trying to debug
an issue on Travis CI involving environment variables. Basically, I am not sure
if an environment variable is being set correctly. So in my code, I put
print(os.environ.keys
Aaron Meurer added the comment:
So the best fix is to just override keys() in the _Environ class, so that it
returns an EnvironKeysView class that overrides __repr__?
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Python tracker
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New submission from Aaron Meurer :
inspect.getsource(datetime) shows the Python source code for datetime, even
when it is the C extension. This is very confusing.
I believe it's because _datetime is used to override everything in datetime at
the end of the file (here
https://githu
Aaron Meurer added the comment:
Serhiy, isn't option 4?
4. Make KeysView.__repr__ show list(self). Add a custom wrapper for Shelf's
KeysView so that it doesn't do this.
This seems to be what Victor is suggesting. It makes the most sense to me for
the common (i.e., default
Aaron Meurer added the comment:
Can't third party code write their own proxies? Why do we have to do that?
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Aaron Hall added the comment:
Now that dicts are sortable, does that make the sort_keys argument redundant?
Should this bug be changed to "won't fix"?
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Aaron Hall added the comment:
>From a design standpoint, I'm fairly certain the sort_keys argument was
>created due to Python's dicts being arbitrarily ordered.
Coercing to strings before sorting is unsatisfactory because, e.g. numbers sort
lexicographically instead of by nu
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Aaron Hall added the comment:
Should pydoc treat a partial object like a function?
Should a partial be an instance of a function?
Should we be able to add all the nice things that functions have to it?
If we want that, should we simply instantiate a function the normal way, with a
new
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