[issue20095] what is that result!?

[Liam Marsh]

New submission from Liam Marsh:

when does 3*0.1 make 0.30004 ?
YES it is the same program!

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components: Regular Expressions
messages: 207092
nosy: Liam.Marsh, ezio.melotti, mrabarnett
priority: normal
severity: normal
status: open
title: what is that result!?
versions: Python 3.3

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[issue7464] circular reference in HTTPResponse by urllib2

[Kristján Valur Jónsson]

Kristján Valur Jónsson added the comment:

No, the socket is actually closed when response's close() method is called.  
The problem is that the HTTPResponse object, buried deep within the nested 
classes returned from do_open(), has a circular reference, and _it_ will not go 
away.

No one is _relying_ on garbage collection in the sense that this is not, I 
think, designed behaviour, merely an unintentional effect of storing a bound 
method in the object inance.

As always, circular reference should be avoided when possible since relying on 
gc is not something to be done lightly.

Now, I think that changing the complicated wrapping at this stage is not 
possible, but merely replacing the bound method with a weak method might just 
do the trick.

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[issue20095] what is that result!?

[Mark Dickinson]

Mark Dickinson added the comment:

This is how binary floating-point arithmetic works.  See

http://docs.python.org/3/tutorial/floatingpoint.html

for some explanations.

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resolution:  -> invalid
status: open -> closed

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[issue20095] what is that result!?

[Mark Dickinson]

Changes by Mark Dickinson :


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[issue19732] python fails to build when configured with --with-system-libmpdec

[Stefan Krah]

Stefan Krah added the comment:

I wanted to force people to link explicitly with -l:libmpdec.so.2 in
order to avoid picking up a wrong version.  But indeed that won't work
since the GNU linker happily picks up the static lib with -lmpdec if
libmpdec.so is missing.

The docs are part of my website repo and are copied manually as
part of the release process.

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[issue20095] what is that result!?

[Liam Marsh]

Liam Marsh added the comment:

can you add an approximation of the result in the command?
(ex: the biggest precision in the values is 0.1, so it won't show after 4.0)
meen while, thank you.

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[issue18314] Have os.unlink remove junction points

[Kim Gräsman]

Kim Gräsman added the comment:

I really needed the well-wishing with regard to buffer sizing :-)

Here's a patch for a couple of fronts:
- Teach os.unlink about junction points
- Introduce _winapi.CreateJunction
- Introduce a new test suite in test_os.py for junction points

I pulled the definition of _REPARSE_DATA_BUFFER out into a new header called 
winreparse.h.

I'd appreciate critical review of _winapi.CreateJunction to make sure I haven't 
missed anything. I'm not familiar with the Python/C interop idioms, so I might 
have missed something wrt arguments/return values handling.

Happy new year!

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Added file: http://bugs.python.org/file33288/unlink-junctions.patch

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[issue20047] bytearray partition bug

[Brett Cannon]

Changes by Brett Cannon :


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[issue19995] %c, %o, %x, %X accept non-integer values instead of raising an exception

[Ethan Furman]

Ethan Furman added the comment:

Better doc enhancement thanks to R. David Murray (thanks!).

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Added file: http://bugs.python.org/file33289/issue19995.stoneleaf.03.patch

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[issue19995] %c, %o, %x, %X accept non-integer values instead of raising an exception

[R. David Murray]

Changes by R. David Murray :


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[issue19995] %c, %o, %x, %X accept non-integer values instead of raising an exception

[Eric V. Smith]

Eric V. Smith added the comment:

While I think this is an improvement, I don't think we can make this change in 
behavior at this stage in 3.4. Won't it have to go in 3.5?

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[issue19995] %c, %o, %x, %X accept non-integer values instead of raising an exception

[Ethan Furman]

Ethan Furman added the comment:

I can see why we wouldn't want to make this change in a point release, but this 
is a feature release we're talking about and this seems like buggy behavior:

--> hex(3.14)
Traceback (most recent call last):
  File "", line 1, in 
TypeError: 'float' object cannot be interpreted as an integer

--> '%x' % 3.14
'3'

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[issue19995] %c, %o, %x, %X accept non-integer values instead of raising an exception

[Eric V. Smith]

Eric V. Smith added the comment:

I agree the behavior is bad and should be fixed. But it's a new feature that 
will break existing code, and 3.4 is in beta, and therefore feature freeze. 
Unfortunately, I think this has to go into 3.5, unless you can get Larry to 
grant you an exception.

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[issue18310] itertools.tee() can't accept keyword arguments

[py.user]

Changes by py.user :


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[issue18310] itertools.tee() can't accept keyword arguments

[py.user]

py.user added the comment:

for example
http://docs.python.org/3/library/itertools.html#itertools.permutations

has same description and it's a keyword

compare
"itertools.tee(iterable, n=2)"
"itertools.permutations(iterable, r=None)"


>>> itertools.permutations('abc')

>>> itertools.permutations('abc', r=2)

>>> 
>>> 
>>> itertools.tee('abc')
(, )
>>> itertools.tee('abc', n=2)
Traceback (most recent call last):
  File "", line 1, in 
TypeError: tee() takes no keyword arguments
>>>

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[issue18310] itertools.tee() can't accept keyword arguments

[py.user]

Changes by py.user :


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[issue20096] Mention modernize and future in Python 2/3 porting HOWTO

[Brett Cannon]

New submission from Brett Cannon:

https://github.com/mitsuhiko/python-modernize
http://python-future.org/

Should also restructure to de-emphasize 2to3 and other approaches. In all 
honesty it should probably be nearly gutted to just "here are examples of how 
to write Python 2/3 compatible code", point to appropriate libraries, and be 
done with it with a minimal mention of 2to3 and 3to2.

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components: Documentation
messages: 207103
nosy: brett.cannon, docs@python
priority: normal
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status: open
title: Mention modernize and future in Python 2/3 porting HOWTO
versions: Python 3.4

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[issue20096] Mention modernize and future in Python 2/3 porting HOWTO

[Barry A. Warsaw]

Changes by Barry A. Warsaw :


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[issue18604] Consolidate gui available checks in test.support

[Zachary Ware]

Zachary Ware added the comment:

Here's a patch for 3.4, and some sample verbose output[1] from the AMD64 Win7 
buildbot (which runs buildbot as a service, and thus has no gui available).

[1] 
http://buildbot.python.org/all/builders/AMD64%20Windows7%20SP1%20custom/builds/40/steps/test/logs/stdio

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nosy: +zach.ware
Added file: http://bugs.python.org/file33290/issue18604.diff

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[issue20097] Bad use of `self` in importlib

[Ram Rachum]

New submission from Ram Rachum:

There's a bad usage of `self` here:


http://hg.python.org/cpython/file/fd846837492d/Lib/importlib/_bootstrap.py#l1431

`self` isn't defined because it's a class method.

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title: Bad use of `self` in importlib
type: crash
versions: Python 3.4

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[issue20097] Bad use of `self` in importlib

[Christian Heimes]

Christian Heimes added the comment:

I don't see a class method at line 1431.

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[issue20097] Bad use of `self` in importlib

[Ram Rachum]

Ram Rachum added the comment:

Sorry, bad link, this is the right link:

http://hg.python.org/cpython/file/fd846837492d/Lib/importlib/_bootstrap.py#l1409

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[issue6516] reset owner/group to root for distutils tarballs

[Roundup Robot]

Roundup Robot added the comment:

New changeset 83f12a9593db by Zachary Ware in branch 'default':
Issue #19544, #6516: check ZLIB_SUPPORT, not zlib (which might not be bound)
http://hg.python.org/cpython/rev/83f12a9593db

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[issue19544] Port distutils as found in Python 2.7 to Python 3.x.

[Roundup Robot]

Roundup Robot added the comment:

New changeset 83f12a9593db by Zachary Ware in branch 'default':
Issue #19544, #6516: check ZLIB_SUPPORT, not zlib (which might not be bound)
http://hg.python.org/cpython/rev/83f12a9593db

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[issue20097] Bad use of `self` in importlib

[Christian Heimes]

Christian Heimes added the comment:

Thanks! :)

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stage:  -> needs patch

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[issue19619] Blacklist base64, hex, ... codecs from bytes.decode() and str.encode()

[Roundup Robot]

Roundup Robot added the comment:

New changeset 0e10367c88ce by Zachary Ware in branch 'default':
Issue19619: skip zlib error test when zlib not available
http://hg.python.org/cpython/rev/0e10367c88ce

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[issue6516] reset owner/group to root for distutils tarballs

[Roundup Robot]

Roundup Robot added the comment:

New changeset 2a872126f4a1 by Zachary Ware in branch 'default':
Issue #19544, #6516: check ZLIB_SUPPORT, not zlib (which might not be bound)
http://hg.python.org/cpython/rev/2a872126f4a1

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[issue19544] Port distutils as found in Python 2.7 to Python 3.x.

[Roundup Robot]

Roundup Robot added the comment:

New changeset 2a872126f4a1 by Zachary Ware in branch 'default':
Issue #19544, #6516: check ZLIB_SUPPORT, not zlib (which might not be bound)
http://hg.python.org/cpython/rev/2a872126f4a1

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[issue19995] %c, %o, %x, %X accept non-integer values instead of raising an exception

[R. David Murray]

R. David Murray added the comment:

We don't usually *break* existing working code even if the output is wrong.  If 
you want to make '%x' % 3.14, etc, raise an error, I think you we should go 
through a deprecation period first.  The deprecation messages should, of 
course, be added now.

In other words, I would probably have voted against commit even if we weren't 
in beta yet.  It's a bit borderline, since the output is *wrong*, but given 
that we *are* in beta I think we'd better go the deprecation route.

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[issue19995] %c, %o, %x, %X accept non-integer values instead of raising an exception

[Ethan Furman]

Ethan Furman added the comment:

I can live with the deprecation route.  I'll create a patch today or tomorrow 
for that.

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[issue20097] Bad use of `self` in importlib

[Brett Cannon]

Changes by Brett Cannon :


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stage: needs patch -> test needed

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[issue20097] Bad use of `self` in importlib

[Brett Cannon]

Changes by Brett Cannon :


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dependencies: +Add tests for importlib.machinery.WindowsRegistryFinder

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[issue20098] email policy needs a mangle_from setting

[R. David Murray]

New submission from R. David Murray:

I missed this.  It still defaults to True in Generator.  It should default to 
False in the new policies (but True in compat32).

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priority: normal
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status: open
title: email policy needs a mangle_from setting
type: enhancement
versions: Python 3.5

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[issue19995] %c, %o, %x, %X accept non-integer values instead of raising an exception

[Larry Hastings]

Larry Hastings added the comment:

I wouldn't call this a new feature--it's definitely a bug fix.  So the "feature 
freeze" rule does not automatically apply.  I definitely wouldn't permit this 
once we reach release candidates, but we aren't there yet.

I get the impression that it will break code, and it does seem kind of late.  
So I'm not saying yes or no yet.  Let me think about it some more.

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