[issue23220] IDLE does not display \b backspace correctly.

[Ned Deily]

Ned Deily added the comment:

It's helpful to keep in mind that IDLE is a Tk application written in Python 
and, as such, depends on Tk to do nearly everything associated with writing to 
displays and reading from keyboards and pointing devices.  If you try 
outputting the same string using the Tk shell, wish, you'll see exactly the 
same behavior as you do in IDLE:

$ wish
% .text insert 1.0 "hello\b\b\b\b\bHELLO"
% pack .text

And you'll see the same Tk platform differences.  With the native OS X Tk's, 
the backspace characters aren't displayed; with a Linux or OS X X11 Tk, empty 
box characters are displayed.  That may also depend on which font is in use.  
In any case, the Tk text widget does not behave the same way in this regard as 
most terminal emulator windows do would do with backspace characters.  So it's 
up to any Tk app to figure out how it wants to deal with them.

This issue has come up before for Tkinter in general: back in 2001, effbot 
suggested some code to search for and edit backspace runs in Tk text.  
Presumably something similar could be added to IDLE if there was general 
agreement that this was desirable (after verifying that it works on all of the 
Tk platforms that IDLE supports).  See 
https://mail.python.org/pipermail/python-list/2001-December/085908.html

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[issue23221] "a(n) the", "the a(n)" typos

[Serhiy Storchaka]

Changes by Serhiy Storchaka :


--
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components: +Documentation
nosy: +docs@python, r.david.murray
stage:  -> needs patch

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[issue21408] delegation of `!=` to the right-hand side argument is not always done

[Martin Panter]

Martin Panter added the comment:

This patch should fix the problem I think. Before the __ne__() implementation 
was calling the “==” operator; now it calls the __eq__() method instead.

Also includes extra test for Issue 4395 to avoid having conficting patches.

--
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Added file: http://bugs.python.org/file37672/method-not-operator.patch

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[issue4395] Document auto __ne__ generation; provide a use case for non-trivial __ne__

[Andrew Svetlov]

Changes by Andrew Svetlov :


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[issue4395] Document auto __ne__ generation; provide a use case for non-trivial __ne__

[Andrew Svetlov]

Changes by Andrew Svetlov :


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versions: +Python 3.4, Python 3.5 -Python 3.2, Python 3.3

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[issue22052] Comparison operators called in reverse order for subclasses with no override.

[Martin Panter]

Martin Panter added the comment:

I have included some rules about the priority for calling reflected operator 
methods in my patch to Issue 4395

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[issue4395] Document auto __ne__ generation; provide a use case for non-trivial __ne__

[Martin Panter]

Martin Panter added the comment:

Here is a patch that documents the default object.__ne__() implementation. It 
also documents the subclass priority rules for the reflected comparison 
methods, which is raised in Issue 22052.

I have made some more tests to verify the relationships exists from __ne__ to 
__eq__, but no other relationships exist for the other methods. I will include 
it in my patch in Issue 21408 to avoid the patches conflicting with each other.

--
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Added file: http://bugs.python.org/file37671/default-ne-reflected-priority.patch

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[issue23205] Unit test needed for IDLE's GrepDialog.py's findfiles()

[Al Sweigart]

Al Sweigart added the comment:

I checked with a couple grep programs and they use depth first. Which makes 
sense, since you'd want the return order to be something like:

/a/spam.txt
/a/aa/spam.txt
/a/bb/spam.txt
/x/spam.txt
/y/spam.txt
/z/spam.txt

...instead of the bread-first:

/a/spam.txt
/x/spam.txt
/y/spam.txt
/z/spam.txt
/a/aa/spam.txt
/a/bb/spam.txt

However, it turns out this is moot since the first thing GrepDialog.py does 
with the returned results is sort them.

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[issue23180] Rename IDLE's "Windows" menu item to "Window"

[Al Sweigart]

Al Sweigart added the comment:

Will do, re marking IDLE issues for 2.7, 3.4, and 3.5 only. Thanks for the 
heads up.

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[issue23220] IDLE does not display \b backspace correctly.

[Al Sweigart]

Al Sweigart added the comment:

For clarification, this happens on Windows 7.

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[issue23218] Modernize the IDLE Find/Replace/Find in Files dialogs

[Al Sweigart]

Changes by Al Sweigart :


--
versions: +Python 2.7, Python 3.4

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[issue23220] IDLE does not display \b backspace correctly.

[Al Sweigart]

Changes by Al Sweigart :


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versions: +Python 2.7

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[issue23216] IDLE grep/find/replace source code needs docstrings

[Al Sweigart]

Changes by Al Sweigart :


--
versions: +Python 2.7, Python 3.4

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[issue23220] IDLE does not display \b backspace correctly.

[Martin Panter]

Martin Panter added the comment:

As far as I understand, Idle doesn’t interpret any terminal control codes apart 
from a plain \n for a new line. I know it doesn’t do a carriage return for \r 
either.

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[issue23220] IDLE does not display \b backspace correctly.

[Carol Willing]

Carol Willing added the comment:

FWIW: On Mac OS X 10.9.5 using Python 3.4.2, IDLE's interactive shell (started 
from the IDLE.app icon):

>>>print('hello\b\b\b\b\bHELLO')
helloHELLO

>From the command line using python3 interactive shell:
>>>print('hello\b\b\b\b\bHELLO')
HELLO

Both return a  for type('hello\b\b\b\b\bHELLO') 
Interestingly, both behave the same when executing:
>>>'hello\b\b\b\b\bHELLO'
'hello\x08\x08\x08\x08\x08HELLO'


I'm not sure that IDLE is used much on OS X since the Terminal is easily 
available. Since K12 education may use it, it would be nice to have consistency 
across the OSes.

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[issue23206] json.dumps(ensure_ascii=False) is ~10x slower than json.dumps()

[Arfrever Frehtes Taifersar Arahesis]

Changes by Arfrever Frehtes Taifersar Arahesis :


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[issue23203] Aliasing import of sub-{module, package} from the package raises AttributeError on import.

[Arfrever Frehtes Taifersar Arahesis]

Changes by Arfrever Frehtes Taifersar Arahesis :


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[issue11691] sqlite3 Cursor.description doesn't set type_code

[Gerhard Häring]

Changes by Gerhard Häring :


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[issue9924] sqlite3 SELECT does not BEGIN a transaction, but should according to spec

[Gerhard Häring]

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[issue20274] sqlite module has bad argument parsing code, including undefined behavior in C

[Gerhard Häring]

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[issue21408] delegation of `!=` to the right-hand side argument is not always done

[Arfrever Frehtes Taifersar Arahesis]

Changes by Arfrever Frehtes Taifersar Arahesis :


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[issue20463] sqlite dumpiter dumps invalid script when virtual tables are used

[Gerhard Häring]

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[issue13583] sqlite3.Row doesn't support slice indexes

[Gerhard Häring]

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[issue16958] The sqlite3 context manager does not work with isolation_level=None

[Gerhard Häring]

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[issue21465] sqlite3 Row can return duplicate keys when using adapters

[Gerhard Häring]

Changes by Gerhard Häring :


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[issue21836] Fix sqlite3 in unicodeless build

[Gerhard Häring]

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[issue20562] sqlite3 returns result set with doubled first entry

[Gerhard Häring]

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[issue20587] sqlite3 converter not being called

[Gerhard Häring]

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[issue13299] namedtuple row factory for sqlite3

[Gerhard Häring]

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[issue10740] sqlite3 module breaks transactions and potentially corrupts data

[Gerhard Häring]

Changes by Gerhard Häring :


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[issue23221] "a(n) the", "the a(n)" typos

[Arfrever Frehtes Taifersar Arahesis]

New submission from Arfrever Frehtes Taifersar Arahesis:

In default branch:

$ grep -Er '(^|[[:space:]])an? the($|[[:space:]])' *
Doc/c-api/structures.rst::c:type:`PyObject\*`, it is common that the method 
implementation uses a the
Include/dynamic_annotations.h: is about to be reused, or when a the locking 
discipline for a variable
Include/unicodeobject.h:/* Initializes the canonical string representation from 
a the deprecated
Lib/lib2to3/fixes/fix_exitfunc.py:# First, find a the sys import. We'll 
just hope it's global scope.
Lib/socket.py:Create a socket object from a the bytes object returned by
Lib/http/cookiejar.py:"""Return string representation of Cookie in an the 
LWP cookie file format.
Modules/_ctypes/_ctypes.c:   A Pointer instance must keep a the value it 
points to alive.  So, a

$ grep -Er '(^|[[:space:]])the an?($|[[:space:]])' *
Doc/library/unittest.mock.rst:being looked up on the a module and so we have to 
patch ``a.SomeClass`` instead::
Doc/c-api/init.rst:   Return the a pointer to the first :c:type:`PyThreadState` 
object in the list of
Doc/c-api/exceptions.rst:  case of a class exception, or it may the a 
subclass of the expected exception.)
Doc/distutils/apiref.rst:   *base_dir* is just the a name of a directory which 
doesn't necessarily exist
Lib/test/test_argparse.py:"""Tests the an optional action that is 
required"""
Lib/ssl.py:"""Return the a list of ciphers shared by the client during 
the
Lib/distutils/dir_util.py:'base_dir' is just the a name of a directory 
which doesn't necessarily

'the a module' in Doc/library/unittest.mock.rst probably should be 'the ``a`` 
module'.
'may the a' in Doc/c-api/exceptions.rst should be 'may be a'.

--
keywords: easy
messages: 233829
nosy: Arfrever
priority: normal
severity: normal
status: open
title: "a(n) the", "the a(n)" typos
versions: Python 2.7, Python 3.4, Python 3.5

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[issue23220] IDLE does not display \b backspace correctly.

[Al Sweigart]

New submission from Al Sweigart:

IDLE cannot display the \b backspace character correctly. From IDLE's 
interactive shell:

>>> print('hello\b\b\b\b\bHELLO')
hello◙HELLO

Whereas from cmd:

>>> print('hello\b\b\b\b\bHELLO')
HELLO

--
messages: 233828
nosy: Al.Sweigart
priority: normal
severity: normal
status: open
title: IDLE does not display \b backspace correctly.
versions: Python 3.4, Python 3.5

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[issue23166] urllib2 ignores opener configuration under certain circumstances

[Arfrever Frehtes Taifersar Arahesis]

Changes by Arfrever Frehtes Taifersar Arahesis :


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[issue23165] Heap overwrite in Python/fileutils.c:_Py_char2wchar() on 32 bit systems due to malloc parameter overflow

[Arfrever Frehtes Taifersar Arahesis]

Changes by Arfrever Frehtes Taifersar Arahesis :


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[issue21408] delegation of `!=` to the right-hand side argument is not always done

[Martin Panter]

Martin Panter added the comment:

There is a bit of analysis of the object.__ne__() implementation in Issue 4395. 
If my understanding is correct, I think it is a bug that object.__ne__(self, 
other) evaluates “not self == other”. It should evaluate “not 
self.__eq__(other)” instead, so that NotImplemented can be caught, allowing the 
reflected other.__ne__(self) method to be tried.

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[issue23185] add inf and nan to math module

[Ethan Furman]

Changes by Ethan Furman :


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[issue23206] json.dumps(ensure_ascii=False) is ~10x slower than json.dumps()

[INADA Naoki]

INADA Naoki added the comment:

test_encode_basestring_ascii.py has duplicated test cases.

--
Added file: http://bugs.python.org/file37670/json-fast-unicode-encode.patch

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[issue23206] json.dumps(ensure_ascii=False) is ~10x slower than json.dumps()

[INADA Naoki]

INADA Naoki added the comment:

I've updated patch to use PyUnicode_MAX_CHAR_VALUE().

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[issue22411] Embedding Python on Windows

[Steve Dower]

Steve Dower added the comment:

distutils will (now, after some changes in 3.5) build debug versions of 
packages on installation when running with python_d.exe. I haven't tested 
exactly how pip behaves here, but it should work fine if you run with a command 
line like this:

python_d.exe -m pip install --no-use-wheel --no-clean --build  


I don't think pip will create a pip_d.exe, and it's likely that if a wheel is 
available it will grab that and you really need to build it locally. Using 
--no-clean and --build to specify where to build it will ensure that the 
symbols for the package aren't deleted, which may help with debugging, but if 
you don't care about that you can omit those two parameters.

I've also been experimenting with adding an option to download and install 
debug binaries as part of the installer, and it looks like it'll work fine. So 
that at least will make things simpler for developers. Another change for 3.5 
that will also help is #22980 (though that one isn't quite settled yet and may 
change again).

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[issue23203] Aliasing import of sub-{module, package} from the package raises AttributeError on import.

[Brett Cannon]

Brett Cannon added the comment:

That seems reasonable. I guess first step is a patch and then seeing if it 
passes the test suite.

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[issue22980] C extension naming doesn't take bitness into account

[Steve Dower]

Steve Dower added the comment:

> Could you explain what replacing the _d suffix with a "d" ABI flag
> would break ?

It breaks consistency with python_d.exe and python35_d.dll, mainly, and those 
are not going to change (specifically, python.exe and python35.dll are not 
going to change, and so there's no point changing the debug versions any more 
than with _d).

It would also break consistency with untagged PYDs, which are still supported 
but still need to distinguish between debug and release builds. Currently the 
accepted suffixes are "_d.cp35-{plat}.pyd" and "_d.pyd". While we could start 
requiring at least "cp3d" as the API tag, that would break a lot of development 
environments for no gain.

So basically, I see compelling reasons for allowing the platform in the name, 
good enough reasons for the version, but not good enough reasons for changing 
the existing debug tag (and no reason for the m flag at all).

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[issue22411] Embedding Python on Windows

[Joakim Karlsson]

Joakim Karlsson added the comment:

Sounds reasonable.

It would also require that all third party packages supply a "*_d.pyd" version 
of any extensions.

Does setuptools and pip have any support for automatically creating debug 
versions of extensions with the correct naming scheme when creating wheels or 
compiling during installation? A (really shallow) search didn't find any info 
on this.

Anyway, thanks for stepping up and taking charge of the windows installers!

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[issue23217] help() function incorrectly captures comment preceding a nested function

[R. David Murray]

Changes by R. David Murray :


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[issue23201] Decimal(0)**0 is an error, 0**0 is 1, but Decimal(0) == 0

[Stefan Krah]

Stefan Krah added the comment:

For the differences between the standard and IEEE 754-2008 we could
link to:

  http://speleotrove.com/decimal/dascope.html


In the long run, perhaps we should move to IEEE, because we're
almost there (but that's a separate issue).

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[issue23163] pdb docs need to contain a statement on threads/multithreaded debugging

[Xavier de Gaye]

Xavier de Gaye added the comment:

The pdb documentation could make an explicit reference to the documentation of 
sys.settrace() where it is explained that the function is thread specific.

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[issue23188] Provide a C helper function to chain raised (but not yet caught) exceptions

[Nick Coghlan]

Nick Coghlan added the comment:

Updated the issue title and type again based on Antoine's explanation.

--
title: Exception chaining should trigger for non-normalised exceptions -> 
Provide a C helper function to chain raised (but not yet caught) exceptions
type: behavior -> enhancement

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[issue23188] Exception chaining should trigger for non-normalised exceptions

[Nick Coghlan]

Nick Coghlan added the comment:

Ah, confusion between "exception has been raised" and "we're in an active 
exception handler" is almost certainly what is happening. In both issue 22906 
and my previous codec exception wrapping work, we're still in the C code that 
raised the exception, *before* we make it back to the eval loop and any Python 
level exception handling.

So I think that's the distinction we need to ensure is documented, and 
potentially a new public helper function provided - if you're in a Python level 
exception handler, then exception context chaining will be handled 
automatically for you in PyErr_SetObject, but if you're still in C code and 
haven't made it back to the eval loop after raising an exception, then you're 
going to have to do any exception chaining explicitly.

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[issue23163] pdb docs need to contain a statement on threads/multithreaded debugging

[Xavier de Gaye]

Xavier de Gaye added the comment:

pdb does not ignore breakpoints which are set and hit in a non-main thread.
For example with the attached script:

$ python pdb_thread.py
> pdb_thread.py(5)foo()
-> lineno = 5
(Pdb) break 6
Breakpoint 1 at pdb_thread.py:6
(Pdb) continue
> pdb_thread.py(6)foo()
-> lineno = 6
(Pdb) threading.current_thread().name
'fooThread'
(Pdb)

--
nosy: +xdegaye
Added file: http://bugs.python.org/file37668/pdb_thread.py

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[issue23203] Aliasing import of sub-{module, package} from the package raises AttributeError on import.

[Nick Coghlan]

Nick Coghlan added the comment:

I'm suggesting we change this part of the bytecode emitted for "import x.y.z as 
bar":

  6 IMPORT_NAME  0 (x.y.z)
  9 LOAD_ATTR1 (y)
 12 LOAD_ATTR2 (z)
 15 STORE_NAME   3 (bar)

to instead emit:

  6 IMPORT_NAME  0 (x.y)
  9 IMPORT_FROM  1 (z)
 12 STORE_NAME   2 (bar)
 15 POP_TOP

The degenerate case of "import x as y" would be unchanged, only cases which 
currently emit LOAD_ATTR instructions would be modified.

I haven't looked at the practical details yet, but the key would be to use 
IMPORT_FROM to do the name resolution, rather than LOAD_ATTR, thus enabling the 
fallback to sys.modules for the eager lookup.

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[issue21408] delegation of `!=` to the right-hand side argument is not always done

[Martin Panter]

Changes by Martin Panter :


--
nosy: +vadmium

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[issue23219] asyncio: cancelling wait_for(task, timeout) must also cancel the task

[STINNER Victor]

STINNER Victor added the comment:

Oops, I forgot to call remove_done_callback(). New patch attached.

My patch is based on Gustavo Carneiro's patch from Tulip issue #211.

--
Added file: http://bugs.python.org/file37667/cancel_wait_for-2.patch

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[issue23219] asyncio: cancelling wait_for(task, timeout) must also cancel the task

[STINNER Victor]

Changes by STINNER Victor :


Removed file: http://bugs.python.org/file37665/cancel_wait_for.patch

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[issue23219] asyncio: cancelling wait_for(task, timeout) must also cancel the task

[STINNER Victor]

New submission from STINNER Victor:

Cancelling wait_for(task, timeout) must also cancel the waited task. Attached 
patch fixes this issue.

Original issue:
https://code.google.com/p/tulip/issues/detail?id=211

--
components: asyncio
files: cancel_wait_for.patch
keywords: patch
messages: 233813
nosy: gvanrossum, haypo, yselivanov
priority: normal
severity: normal
status: open
title: asyncio: cancelling wait_for(task, timeout) must also cancel the task
versions: Python 3.4, Python 3.5
Added file: http://bugs.python.org/file37665/cancel_wait_for.patch

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[issue23218] Modernize the IDLE Find/Replace/Find in Files dialogs

[Al Sweigart]

Changes by Al Sweigart :


--
keywords: +patch
Added file: http://bugs.python.org/file37666/idle_find_ui_redesign.diff

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[issue23218] Modernize the IDLE Find/Replace/Find in Files dialogs

[Al Sweigart]

New submission from Al Sweigart:

Various changes to modernize the user interface of the Find, Replace, and Find 
in Files dialogs:

- Got rid of the "close" button, since it is redundant.
- Moved the buttons below the text fields, to make better use of screen real 
estate.
- Shorten the titles by getting rid of the "Dialog" part.
- Renamed "Search" title to "Find" to match the menu item.
- Renamed "Regular expression" label to the shorter "Regex"
- Added slightly more padding.
- Removed the "Replace+Find" and made "Replace" have this functionality. (all 
modern editors use Replace to mean "Replace and Find")

The attached png shows the before/after differences in the design of these 
dialogs.

--
components: IDLE
files: idle_grep_compare.png
messages: 233812
nosy: Al.Sweigart
priority: normal
severity: normal
status: open
title: Modernize the IDLE Find/Replace/Find in Files dialogs
type: enhancement
versions: Python 3.5
Added file: http://bugs.python.org/file37664/idle_grep_compare.png

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[issue20699] Behavior of ZipFile with file-like object and BufferedWriter.

[Serhiy Storchaka]

Changes by Serhiy Storchaka :


--
nosy: +serhiy.storchaka
stage:  -> patch review
versions: +Python 3.5

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[issue23217] help() function incorrectly captures comment preceding a nested function

[Raymond Hettinger]

New submission from Raymond Hettinger:

The help() function mysteriously captures a comment on the line preceding an 
inner function definition in a nested scope.

Given this code:


def outer(func):
#comment
def inner():
return
return inner

@outer
def f():
return


Calling help(f) produces:
-

Help on function inner in module __main__:

inner()
#comment

--
components: Library (Lib)
messages: 233811
nosy: rhettinger
priority: normal
severity: normal
status: open
title: help() function incorrectly captures comment preceding a nested function
type: behavior
versions: Python 3.2, Python 3.3, Python 3.5

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[issue23205] Unit test needed for IDLE's GrepDialog.py's findfiles()

[Terry J. Reedy]

Terry J. Reedy added the comment:

I have been putting off re-writing findfiles because it partly duplicates 
os.listdir, which should perhaps be used instead, except that a new, improved, 
os.scandir is in the works: PEP 471 and  #22524.

I believe filefiles currently searches depth first, whereas I would generally 
prefer breadth first.  For instance, I would like all hits in /lib together and 
then hits in /lib/idlelib, /lib/test, /lib/tinter, etc.  What do you think?

--
nosy: +terry.reedy
stage:  -> patch review
type:  -> enhancement
versions: +Python 2.7, Python 3.4

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[issue23201] Decimal(0)**0 is an error, 0**0 is 1, but Decimal(0) == 0

[Raymond Hettinger]

Raymond Hettinger added the comment:

> A possibility would be to add "(disallowed by the 
> Decimal standard)" to the exception message.

That is what InvalidOperation means ;-)

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[issue23201] Decimal(0)**0 is an error, 0**0 is 1, but Decimal(0) == 0

[Terry J. Reedy]

Terry J. Reedy added the comment:

Thank you Tim.

A possibility would be to add "(disallowed by the Decimal standard)" to the 
exception message.

--
nosy: +terry.reedy
versions:  -Python 3.6

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[issue23216] IDLE grep/find/replace source code needs docstrings

[Al Sweigart]

New submission from Al Sweigart:

The following IDLE files need docstrings for their methods:

GrepDialog.py
SearchEngine.py
SearchDialogBase.py
SearchDialog.py
ReplaceDialog.py

--
components: IDLE
files: idle_docstrings.diff
keywords: patch
messages: 233807
nosy: Al.Sweigart
priority: normal
severity: normal
status: open
title: IDLE grep/find/replace source code needs docstrings
type: enhancement
versions: Python 3.5
Added file: http://bugs.python.org/file37663/idle_docstrings.diff

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[issue19051] Unify buffered readers

[Martin Panter]

Martin Panter added the comment:

Parts of the patch here actually do the same thing as my LZMAFile patch for 
Issue 15955. I wish I had looked at the patch earlier! The difference is I used 
a proposed max_length parameter for the decompressor rather than unlimited 
decompression, and I used the existing BufferedReader class rather than 
implementing a new custom one.

The changes for the “gzip” module could probably be merged with my GzipFile 
patch at Issue 15955 and made to use BufferedReader.

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[issue19776] Provide expanduser() on Path objects

[STINNER Victor]

STINNER Victor added the comment:

Ok, test_pathlib now pass on the buildbot "PPC64 AIX 3.x". I close the issue. 
Nice enhancement of the Path object.

--
resolution:  -> fixed
status: open -> closed

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[issue13742] Add a key parameter (like sorted) to heapq.merge

[Terry J. Reedy]

Terry J. Reedy added the comment:

You can set up mecurial on your machine, make a read-only clone of the cpython 
repository, and compile it just as do other people, whether core-developers or 
otherwise.  See docs.python.org/devguide for details.

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[issue19776] Provide expanduser() on Path objects

[Roundup Robot]

Roundup Robot added the comment:

New changeset 63dac5212552 by Victor Stinner in branch 'default':
Issue #19776: Fix test_pathlib.test_expanduser()
https://hg.python.org/cpython/rev/63dac5212552

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