[issue34486] "RuntimeError: release unlocked lock" when starting a thread

[Radek]

Radek  added the comment:

Any progress on this topic? I think I've encountered this (or similar) issue:

>Traceback (most recent call last):
>  File "logging/__init__.py", line 1944, in shutdown
>  File "logging/__init__.py", line 813, in acquire
>  File "site-packages/utils/signals.py", line 58, in signal_wrapper
>  File "utils/utils.py", line 147, in sigterm_handler
>SystemExit: 0
>
>During handling of the above exception, another exception occurred:
>
>Traceback (most recent call last):
>  File "logging/__init__.py", line 1954, in shutdown
>  File "logging/__init__.py", line 821, in release
>RuntimeError: cannot release un-acquired lock

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[issue24209] Allow IPv6 bind in http.server

[Radek Podgorny]

Change by Radek Podgorny :


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[issue30786] getaddrinfo emulation does not support AI_NUMERICSERV

[Radek Smejkal]

Changes by Radek Smejkal <radek.smej...@laicatc.com>:


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[issue30711] getaddrinfo invalid port number

[Radek Smejkal]

Changes by Radek Smejkal <radek.smej...@laicatc.com>:


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[issue30710] getaddrinfo raises OverflowError

[Radek Smejkal]

Changes by Radek Smejkal <radek.smej...@laicatc.com>:


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[issue30711] getaddrinfo invalid port number

[Radek Smejkal]

Radek Smejkal added the comment:

See also issue30786.

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[issue30786] getaddrinfo emulation does not support AI_NUMERICSERV

[Radek Smejkal]

New submission from Radek Smejkal:

Modules/getaddrinfo.c should support AI_NUMERICSERV.

Moreover, not supporting AI_NUMERICSERV may cause troubles on platforms where 
the getaddrinfo function is available but it's buggy (see configure.ac and 
Modules/socketmodule.c), because Modules/addrinfo.h does not #undef 
AI_NUMERICSERV and Modules/socketmodule.c exports AI_NUMERICSERV defined in a 
system header that may collide with another flag defined in Modules/addrinfo.h 
and confuse the user.

./configure --with-pydebug
Comment out HAVE_GETADDRINFO in pyconfig.h
Comment out ENABLE_IPV6 in pyconfig.h on platforms where getipnodebyname and 
friends are not available
make -j
./python
Python 3.7.0a0 (default, Jun 27 2017, 11:59:50) 
[GCC 4.7.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket
>>> socket.AI_NUMERICSERV

>>> socket.getaddrinfo(None, "http", flags=socket.AI_NUMERICSERV)
Traceback (most recent call last):
  File "", line 1, in 
  File "/home/radek/src/github/cpython/Lib/socket.py", line 743, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 3] invalid value for ai_flags.
>>>

--
components: Extension Modules
messages: 297020
nosy: smejkar
priority: normal
severity: normal
status: open
title: getaddrinfo emulation does not support AI_NUMERICSERV
type: behavior
versions: Python 3.7

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[issue30711] getaddrinfo invalid port number

[Radek Smejkal]

Radek Smejkal added the comment:

See also issue30710.

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[issue30711] getaddrinfo invalid port number

[Radek Smejkal]

Changes by Radek Smejkal <radek.smej...@laicatc.com>:


Removed file: http://bugs.python.org/file46965/getaddrinfo_invalid_port.patch

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[issue30711] getaddrinfo invalid port number

[Radek Smejkal]

Changes by Radek Smejkal <radek.smej...@laicatc.com>:


--
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keywords: +patch
Added file: http://bugs.python.org/file46965/getaddrinfo_invalid_port.patch

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[issue30710] getaddrinfo raises OverflowError

[Radek Smejkal]

Radek Smejkal added the comment:

> I like your idea about getting rid of OverflowError. But wouldn't it make the 
> problem with other reported by you issue, issue30711, worse?

It depends on the implementation of the underlying getaddrinfo. For 
Modules/getaddrinfo.c, it will be worse for positive numbers outside the C long 
range.

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[issue30710] getaddrinfo raises OverflowError

[Radek Smejkal]

Radek Smejkal added the comment:

> Why can't the user simply pass in a string service name in the first place?
He/she can. But I don't propose to change that. The patch only changes the way 
a given number is converted to a string. That is, without an intermediate C 
long.

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[issue30710] getaddrinfo raises OverflowError

[Radek Smejkal]

Radek Smejkal added the comment:

> But how large is the performance hit of this change? It adds at least one 
> additional memory allocation for the str object. If the slowdown is 
> significant perhaps it is worth to keep the old code as a fast path.

commit 5cc7ac24da10568d2a910a91a24183b904118cf8
./python -m timeit -s 'import socket' 'socket.getaddrinfo(None, 1000)'
2000 loops, best of 5: 139 usec per loop
./python -m timeit -s 'import socket' 'socket.getaddrinfo(None, "1000")'
2000 loops, best of 5: 142 usec per loop

with getaddrinfo_overflow_error.patch
./python -m timeit -s 'import socket' 'socket.getaddrinfo(None, 1000)'
2000 loops, best of 5: 140 usec per loop
./python -m timeit -s 'import socket' 'socket.getaddrinfo(None, "1000")'
2000 loops, best of 5: 139 usec per loop

It seems the impact on performance is negligible/not measurable.

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[issue30710] getaddrinfo raises OverflowError

[Radek Smejkal]

Radek Smejkal added the comment:

Use PyObject_Str and PyUnicode_AsUTF8 if the port argument is a PyLong instead 
of converting it to an intermediate C long that may raise OverflowError. See 
getaddrinfo_overflow_error.patch

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keywords: +patch
Added file: http://bugs.python.org/file46964/getaddrinfo_overflow_error.patch

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[issue30711] getaddrinfo invalid port number

[Radek Smejkal]

New submission from Radek Smejkal:

Some getaddrinfo implementations do not detect invalid numeric services and 
blindly pass the port number to htons(). For example, service "960179" is 
returned as port 42675.

glibc
https://sourceware.org/bugzilla/show_bug.cgi?id=16208
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/posix/getaddrinfo.c;h=a8bdd9a1829409bd797637b2c4fca4d67a11012d;hb=HEAD#l435
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/posix/getaddrinfo.c;h=a8bdd9a1829409bd797637b2c4fca4d67a11012d;hb=HEAD#l2313

AIX 7.1 libc
Broken

Modules/getaddrinfo
https://github.com/python/cpython/blob/master/Modules/getaddrinfo.c#L342


On the other hand, for example, OpenBSD and musl check the port range
https://github.com/openbsd/src/blob/master/lib/libc/asr/getaddrinfo_async.c#L477
https://git.musl-libc.org/cgit/musl/tree/src/network/lookup_serv.c#n53


Modules/getaddrinfo should be fixed.

The configure script should detect whether the system getaddrinfo is broken. If 
so, a wrapper that checks numeric services, and returns EAI_SERVICE or calls 
the system getaddrinfo should be used in place of the system getaddrinfo.

--
components: Library (Lib)
messages: 296423
nosy: smejkar
priority: normal
severity: normal
status: open
title: getaddrinfo invalid port number
type: behavior
versions: Python 3.7

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[issue30710] getaddrinfo raises OverflowError

[Radek Smejkal]

New submission from Radek Smejkal:

If the port argument is a number, getaddrinfo attempts to convert it to a C 
long, that raises OverflowError if the conversion fails.

Instead, getaddrinfo should convert the port to a string (bytes) directly and 
rely on the underlying getaddrinfo to return EAI_SERVICE. This is also 
consistent with the case when a numeric port is passed as a string.

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messages: 296421
nosy: smejkar
priority: normal
severity: normal
status: open
title: getaddrinfo raises OverflowError
type: behavior
versions: Python 3.7

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Re: Quote of the day

[Radek Holý]

2016-05-17 9:50 GMT+02:00 Steven D'Aprano <
steve+comp.lang.pyt...@pearwood.info>:

> Overhead in the office today:
>
>
> "I don't have time to learn an existing library - much faster to make my
> own
> mistakes!"
>
>
>
> --
> Steve
>
> --
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>

*THUMBS UP* At least they are aware of that "own mistakes" part... Not like
my employer...
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Re: Pylint prefers list comprehension over filter...

[Radek Holý]

2016-05-07 21:17 GMT+02:00 Christopher Reimer :

> On 5/5/2016 6:37 PM, Stephen Hansen wrote:
>
>> On Thu, May 5, 2016, at 06:26 PM, Christopher Reimer wrote:
>>
>>> Which is one is correct (Pythonic)? Or does it matter?
>>>
>> First, pylint is somewhat opinionated, and its default options shouldn't
>> be taken as gospel. There's no correct: filter is fine.
>>
>
> Since the code I'm working on is resume fodder (i.e., "Yes, I code in
> Python! Check out my chess engine code on GitHub!"), I want it to be as
> Pythonic and PEP8-compliant as possible. That includes scoring 10/10 with
> pylint. Never know when an asshat hiring manager would reject my resume out
> of hand because my code fell short with pylint.
>
> For my purposes, I'm using the list comprehension over filter to keep
> pylint happy.
>
>
> Thank you,
>
> Chris R.
> --
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>


Don't forget that you can also place a pylintrc file (with some reasonable
comments) into the repository or use the other means to disable selected
rules
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HTTPServer and SSL

[Radek Holý]

Hello,

some people recommend following implementation of a simple HTTP server
that supports SSL:


Handler = http.server.BaseHTTPRequestHandlerhttpd =
http.server.HTTPServer(("", 4443), Handler)
httpd.socket = ssl.wrap_socket(httpd.socket, server_side=True)
httpd.serve_forever()

I wonder whether this usage is *supported* or not. The documentation
is not explicit about whether the httpd.socket attribute can be safely
reassigned. Also there were some questions regarding a simple HTTPS
server on this list already and none of the answerers mentioned this
approach.

Also there used to be a HTTPSServer in the test suite of Python 2.7 in
2014 that did a similar thing but in the "get_request" method but it
isn't there anymore.

So, is there a *supported* way of combining http.server.HTTPServer and ssl?

Best regards
-- 

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[issue21295] Python 3.4 gives wrong col_offset for Call nodes returned from ast.parse

[Radek Novacek]

Radek Novacek added the comment:

There is still problem with col_offset is some situations, for example 
col_offset of the ast.Attribute should be 4 but is 0 instead:

>>> for x in ast.walk(ast.parse('foo.bar')):
... if hasattr(x, 'col_offset'):
... print("%s: %d" % (x, x.col_offset))
... 
<_ast.Expr object at 0x7fcdc84722b0>: 0
<_ast.Attribute object at 0x7fcdc84723c8>: 0
<_ast.Name object at 0x7fcdc8472438>: 0

Is there any solution to this problem? It causes problems in python support in 
KDevelop (kdev-python).

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[issue21295] Python 3.4 gives wrong col_offset for Call nodes returned from ast.parse

[Radek Novacek]

Radek Novacek added the comment:

Aivar, I have to admit that my knowledge of this is limited, but as I 
understand it, the attribute is "bar" in the "foo.bar" expression.

I can get beginning of the assignment by 
>>> ast.parse('foo.bar').body[0].value.value.col_offset
0

But how can I get position of the 'bar'? My guess is this:
>>> ast.parse('foo.bar').body[0].value.col_offset
but it still returns 0.

Why this two col_offsets returns the same value? How can I get the position of 
'bar' in 'foo.bar'?

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[issue21295] Python 3.4 gives wrong col_offset for Call nodes returned from ast.parse

[Radek Novacek]

Radek Novacek added the comment:

I've ran the tests from first and second comment using python 3.5.0 and it 
seems it produces correct results:

>>> import ast
>>> tree = ast.parse("sin(0.5)")
>>> first_stmt = tree.body[0]
>>> call = first_stmt.value
>>> print("col_offset of call expression:", call.col_offset)
col_offset of call expression: 0
>>> print("col_offset of func of the call:", call.func.col_offset)
col_offset of func of the call: 0

>>> tree = ast.parse("(sin\n(0.5))")
>>> first_stmt = tree.body[0]
>>> call = first_stmt.value
>>> print("col_offset of call expression:", call.col_offset)
col_offset of call expression: 1
>>> print("col_offset of func of the call:", call.func.col_offset)
col_offset of func of the call: 1
>>> print("lineno of call expression:", call.lineno)
lineno of call expression: 1
>>> print("lineno of func of the call:", call.lineno)
lineno of func of the call: 1

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[issue6057] sqlite3 error classes should be documented

[Radek Holý]

Radek Holý added the comment:

One reason why I would like to have it mentioned in the documentation is that 
the fact that it is not documented there causes sqlite3.Error to be missing 
in the objects.inv file generated by Sphinx so that enabling the nitpicky 
mode with intersphinx extension when generating my documentation using Sphinx 
results in many WARNING: py:exc reference target not found: sqlite3.Error 
false positives.

(I'd also like to have it backported to Python 2.6 but I know that it's 
impossible)

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[issue23169] Reflect that PreReq and BuildPreReq are deprecated in the latest RPM

[Radek Simko]

New submission from Radek Simko:

When I try to make custom package of Python 2.7, I use the spec file attached 
in `/Misc/RPM`. I don't really use it to build Python as I want to define some 
specific options, but I do use it as a source of RPM package meta data which I 
can simply reuse when creating the final RPM, e.g.:

rpm -q --specfile ./Misc/RPM/python-2.7.spec --queryformat '%{DESCRIPTION}'

Manipulation with that specfile in RPM 4.4.2.3 (CentOS 5.6) is fine, but there 
are warnings in RPM 4.8.0 (CentOS 6.5):

warning: line 71: buildprereq is deprecated: BuildPrereq: expat-devel
warning: line 72: buildprereq is deprecated: BuildPrereq: db4-devel
warning: line 73: buildprereq is deprecated: BuildPrereq: gdbm-devel
warning: line 74: buildprereq is deprecated: BuildPrereq: sqlite-devel
warning: line 91: prereq is deprecated: Prereq: python2.6 = %{PACKAGE_VERSION}
warning: line 122: prereq is deprecated: Prereq: python2.6 = 
%{PACKAGE_VERSION}-1pydotorg

Here's related thread: 
https://groups.google.com/forum/#!topic/comp.lang.python/R8ahiZ5wyhc
and most importantly here's proof/explanation: 
http://www.rpm.org/wiki/Releases/4.8.0#Packagebuilding

 - PreReq and BuildPreReq are now officially deprecated, with warnings at 
build-time
 - PreReq is mapped to Requires(pre,preun) at build-time

Requires(pre,preun) is backwards compatible, so it works in RPM 4.4 too, I 
would therefore suggest to change [Build]Prereq to 
[Build]Requires(pre,preun) respectively in the specfile to reflect this.

I'm happy to send a patch if some maintainers will agree with proposed solution.

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messages: 233462
nosy: radeksimko
priority: normal
severity: normal
status: open
title: Reflect that PreReq and BuildPreReq are deprecated in the latest RPM
type: enhancement
versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4, Python 3.5, Python 3.6

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Re: Shear image (numpy.ndarray)

[Radek Machulka]

Yes, I already find that scipy.ndimage.interpolation.affine_transform
will solve this (but thank you Robert anyway!).

Just for others (if somebody will find this thread):
The 'matrix' parameter is transformation matrix for shear
transformation. For more detailes see:
http://en.wikipedia.org/wiki/Shear_matrix

Radek
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Shear image (numpy.ndarray)

[Radek Machulka]

Hi,

I am looking for some function that would shear my 2D numpy.ndarray array.
Since the numpy (probably) does not provide such a functionality
(numpy.roll does not do what I need), I hope the PIL might do the trick.

Google give me page that says: 'This function (im.transform) can be used to
scale, translate, rotate, and shear the original image.', however I was not
able to get it work.

So could anybody give me a hand how to use it (or how to shear the image in
different way)?

The input array is 2D (NxM) type numpy.float32.

Thanks
Radek
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[issue5148] gzip.open breaks with 'U' flag

[Radek]

Radek szklarc...@yahoo.com added the comment:

Same bug in 2.5, I don't know if the patch applies to 2.5

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Re: fetch html page via isa proxy

[Radek]

 So you have already tried NTLM Authorization Proxy 
 Server?http://ntlmaps.sourceforge.net/
 This used to work fine for me but that was at least 3-4 years ago.

Actually NTLM proxy server works for most intranet addresses. Not for
the outside Internet ones, though.

Radek

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fetch html page via isa proxy

[Radek]

Hi,

I have been trying several days to get the html page of www.python.org
when behind the corporate MS isa proxy.

I have tried setting http_proxy environment, played with proxy
openers, use ntlm proxy server all without success.

I can get the page using Firefox and IE with proxy settings.

As the last resort I started to play with pywin32 win32inet, but even
the test_win32inet.py does not get there.

Any advice? Or better working example?

Thanks a lot,

Radek

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Re: run subprocess in separate window

[Radek]

Hello,

as you can see, I tried subprocess methods. But could not find the
right call.

Radek


[EMAIL PROTECTED] wrote:
 Radek a écrit :

  Hi,
 
  I am trying to create GUI launcher of several applications using Python
  and Tkinter.
 
  Currently when using subprocess.Popen(mycommand) all output goes to
  the stdout of my launcher.
 
  For some command line applications I need to launch them so that their
  output goes into the separate terminal window.
 
  How can I make it?
 
  Thanks,
 
  Radek

 Hello, have a look at the subprocess module, it might help you get to
 what you want.

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run subprocess in separate window

[Radek]

Hi,

I am trying to create GUI launcher of several applications using Python
and Tkinter.

Currently when using subprocess.Popen(mycommand) all output goes to
the stdout of my launcher.

For some command line applications I need to launch them so that their
output goes into the separate terminal window.

How can I make it?

Thanks,

Radek

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Re: What editor shall I use?

[Radek Kubicek]

 What editor shall I use if my Python script must contain utf-8
 characters?
 I use XP

vim :-)

 Thank you for reply
 l.b.

not for all :-)
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