[ANNOUNCE] PySide 1.0.7 - Beatriz: Python for Qt released!
The PySide team is proud to announce the new release version 1.0.7 of PySide project. Major changes == . Memory consumption optimization; . Bug Fixes; About PySide PySide is the Nokia-sponsored Python Qt bindings project, providing access to not only the complete Qt 4.7 framework but also Qt Mobility, as well as to generator tools for rapidly generating bindings for any C++ libraries. The PySide project is developed in the open, with all facilities you'd expect from any modern OSS project such as all code in a git repository [1], an open Bugzilla [2] for reporting bugs, and an open design process [3]. We welcome any contribution without requiring a transfer of copyright. List of bugs fixed == 996 Missing dependencies for QtWebKit in buildscripts for Fedora 986 Documentation links 985 Provide versioned pyside-docs zip file to help packagers 981 QSettings docs should empathize the behavior changes of value() on different platforms 902 Expose Shiboken functionality through a Python module 997 QDeclarativePropertyMap doesn't work. 994 QIODevice.readData must use qmemcpy instead of qstrncpy 989 Pickling QColor fails 987 Disconnecting a signal that has not been connected 973 shouldInterruptJavaScript slot override is never called 966 QX11Info.display() missing 959 can't pass QVariant to the QtWebkit bridge 1006 Segfault in QLabel init 1002 Segmentation fault on PySide/Spyder exit 998 Segfault with Spyder after switching to another app 995 QDeclarativeView.itemAt returns faulty reference. (leading to SEGFAULT) 990 Segfault when trying to disconnect a signal that is not connected 975 Possible memory leak 991 The __repr__ of various types is broken 988 The type supplied with currentChanged signal in QTabWidget has changed in 1.0.6 Download The files can be downloaded from PySide download page[4] References == [1] http://qt.gitorious.org/pyside [2] http://bugs.openbossa.org/ [3] http://www.pyside.org/docs/pseps/psep-0001.html [4] http://developer.qt.nokia.com/wiki/PySideDownloads PySide Team -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
Re: with statements does not delete the object
y...@zioup.com writes: Is this the expected behaviour: You can learn the expected behaviour for ‘with’ in the documentation URL:http://docs.python.org/reference/compound_stmts.html#the-with-statement. with mylib.token() as t: do_something dir() In the last dir(), after the with loop is finished, t still shows up... I expected it to be unreferenced by then. What gives you that expectation, when it's not the case for any of ‘if’, ‘for’, ‘while’, ‘try’, and so on? The set of statements which introduce a new scope is small, and ‘with’ is not one of them. -- \ “No smoothen the lion.” —lion cage, zoo, Czech Republic | `\ | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Environment variables not visible from Python
I don't understand why some environment variables are not visible from
Python.
[steve@wow-wow ~]$ echo $LINES $COLUMNS $TERM
30 140 xterm
[steve@wow-wow ~]$ python2.6
Python 2.6.6 (r266:84292, Dec 21 2010, 18:12:50)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-27)] on linux2
Type help, copyright, credits or license for more information.
import os
(os.getenv('LINES'), os.getenv('COLUMNS'), os.getenv('TERM'))
(None, None, 'xterm')
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Re: Environment variables not visible from Python
On Thu, Sep 22, 2011 at 11:42 AM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
I don't understand why some environment variables are not visible from
Python.
[steve@wow-wow ~]$ echo $LINES $COLUMNS $TERM
30 140 xterm
[steve@wow-wow ~]$ python2.6
Python 2.6.6 (r266:84292, Dec 21 2010, 18:12:50)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-27)] on linux2
Type help, copyright, credits or license for more information.
import os
(os.getenv('LINES'), os.getenv('COLUMNS'), os.getenv('TERM'))
(None, None, 'xterm')
I have this:
$ python
Python 2.6.6 (r266:84292, Sep 15 2010, 16:22:56)
[GCC 4.4.5] on linux2
Type help, copyright, credits or license for more information.
import os
os.getenv('LINES')
$ python -S
Python 2.6.6 (r266:84292, Sep 15 2010, 16:22:56)
[GCC 4.4.5] on linux2
import os
os.getenv('LINES')
'35'
I hope it helps narrow things down somewhat.
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Re: Environment variables not visible from Python
hello,
On Thu, Sep 22, 2011 at 06:12:01AM +, Steven D'Aprano wrote:
I don't understand why some environment variables are not visible from
Python.
[steve@wow-wow ~]$ echo $LINES $COLUMNS $TERM
30 140 xterm
[steve@wow-wow ~]$ python2.6
Python 2.6.6 (r266:84292, Dec 21 2010, 18:12:50)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-27)] on linux2
Type help, copyright, credits or license for more information.
import os
(os.getenv('LINES'), os.getenv('COLUMNS'), os.getenv('TERM'))
(None, None, 'xterm')
I think TERM is inherited from parent shell, but LINES and
COLUMNS are re-created every child shell. IMHO it's normally,
cause TERM will not change in child, but another variables should
changed...
Look at this:
airween@sebulba:~$ export LINES COLUMNS TERM
airween@sebulba:~$ python2.6
Python 2.6.6 (r266:84292, Mar 25 2011, 19:24:58)
[GCC 4.5.2] on linux2
Type help, copyright, credits or license for more information.
import os
(os.getenv('LINES'), os.getenv('COLUMNS'), os.getenv('TERM'))
('65', '210', 'rxvt-256color')
a.
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Re: Odd behavior with imp.reload and logging
On Thu, Sep 22, 2011 at 3:54 PM, Andrew Berg bahamutzero8...@gmail.com wrote: The main program is an IRC bot, which could potentially be in use by many people in several channels on a network. As it is, the bot can only connect to one server, but it could probably be set up to connect to any number of networks. Making a number of quick fixes or changes to one module could be very irritating to users if the bot has to terminate each time, especially if those users don't know or care about that specific module. Startup time is an issue because it must connect to a network before it can take any input. Also, many disconnects/reconnects could easily cause problems (like the network refusing the connection as a DoS prevention measure). Playing with networking and the desire to reload without restarting? I think Pike may be a good choice for you. It has a C-like syntax but Python-like guts; you use braces to delimit blocks of code, but arrays and mappings and such are first-class objects that you can pass around and use. It's a favorite of mine, but quite off-topic for this mailing list; I'd be happy to help you get started with it. Chris Angelico -- http://mail.python.org/mailman/listinfo/python-list
Re: Environment variables not visible from Python
Am 22.09.2011 08:12 schrieb Steven D'Aprano:
I don't understand why some environment variables are not visible from
Python.
[steve@wow-wow ~]$ echo $LINES $COLUMNS $TERM
30 140 xterm
[steve@wow-wow ~]$ python2.6
Python 2.6.6 (r266:84292, Dec 21 2010, 18:12:50)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-27)] on linux2
Type help, copyright, credits or license for more information.
import os
(os.getenv('LINES'), os.getenv('COLUMNS'), os.getenv('TERM'))
(None, None, 'xterm')
They are no environment variables, but merely shell variables.
You can turn them into environment variables with the shell command
export. After exporting them, they are visible by Python.
The environment can be obtained with env.
So try:
$ python -c 'import os; print \n.join(sorted(%s=%s % (k,v) for k,v
in os.environ.iteritems()))' | diff -u - (env|LANG=C sort)
@@ -61,4 +61,4 @@
XDG_DATA_DIRS=/usr/share
XKEYSYMDB=/usr/share/X11/XKeysymDB
XNLSPATH=/usr/share/X11/nls
-_=/usr/bin/python
+_=/usr/bin/env
and you see that they (nearly) match.
Try as well
$ python -c 'import os; print \n.join(os.getenv(k) or for k in
(LINES,COLUMNS,TERM))'
linux
$ export LINES
$ python -c 'import os; print \n.join(os.getenv(k) or for k in
(LINES,COLUMNS,TERM))'
24
linux
$ export COLUMNS
$ python -c 'import os; print \n.join(os.getenv(k) or for k in
(LINES,COLUMNS,TERM))'
24
80
linux
$
HTH,
Thomas
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Re: Python deadlock using subprocess.popen and communicate
Am 22.09.2011 05:42 schrieb Atherun: I'm pretty sure thats the problem, this is a generic catch all function for running subprocesses. It can be anything to a simple command to a complex command with a ton of output. I'm looking for a better solution to handle the case of running subprocesses that have an undetermined amount of output. Just handle process.stdout/stderr by yourself - read it out until EOF and then wait() for the process. Thomas -- http://mail.python.org/mailman/listinfo/python-list
static statements and thread safety
A recent thread on the python-ideas list got me thinking about the possibility of a static statement (akin to global and nonlocal). I am wondering if an implementation would have to address thread safety concerns. I would expect that static variables would work pretty much the same way as default arguments, with a list of names on the code object and a list of values on the function object. And I would guess that the values from the static variables would get updated on the function object at the end of the call. If multiple threads are executing the function at the same time won't there be a problem with that end-of-call update? -eric p.s. It probably shows that I haven't done a lot of thread-related programming, so perhaps this is not a hard question. -- http://mail.python.org/mailman/listinfo/python-list
Re: Odd behavior with imp.reload and logging
On 2011.09.22 01:46 AM, Chris Angelico wrote: I think Pike may be a good choice for you. That's quite unappealing for a few reasons. First, that would likely require writing an entirely new bot (I'm not even that familiar with the current one; I've only been writing a module for it). Also, I don't really enjoy programming (I'm aware I'm likely in the minority on this list); I tolerate it enough to get certain things done, so learning another language, especially when I'm still learning Python, is not something I want to do. Python is probably not the best tool for this particular job, but I am not nearly dedicated to this project enough to learn another programming language. So, is there any way to at least monitor what happens after a reload? I haven't noticed anything odd until I came across this logging issue. -- CPython 3.2.2 | Windows NT 6.1.7601.17640 | Thunderbird 6.0.2 -- http://mail.python.org/mailman/listinfo/python-list
Re: static statements and thread safety
On Thu, Sep 22, 2011 at 5:45 PM, Eric Snow ericsnowcurren...@gmail.com wrote:
I would expect that static variables would work pretty much the same
way as default arguments
Could you just abuse default arguments to accomplish this?
def accumulate(n,statics={'sum':0}):
statics['sum']+=n
return statics['sum']
accumulate(1)
1
accumulate(10)
11
accumulate(20)
31
accumulate(14)
45
This eliminates any sort of end of function write-back by writing to
static storage immediately. Of course, syntactic assistance would make
this look cleaner, for instance:
def accumulate(n):
static sum=0
sum+=n
return sum
Both of these would, of course, have thread-safety issues. But these
can be resolved by figuring out exactly what you're trying to
accomplish with your static data, and what it really means when two
threads are affecting it at once.
ChrisA
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Re: Odd behavior with imp.reload and logging
On Thu, Sep 22, 2011 at 5:59 PM, Andrew Berg bahamutzero8...@gmail.com wrote:
That's quite unappealing for a few reasons. First, that would likely
require writing an entirely new bot (I'm not even that familiar with the
current one; I've only been writing a module for it).
Ah, then yeah, it's probably not a good idea to change languages. But
you may end up finding other issues with reload() as well.
I wonder whether this would work...
modules=[]
# instead of 'import mymodule' use:
modules.append(__import__('mymodule')); mymodule=modules[-1]
In theory, this should mean that you load it fresh every time - I
think. If not, manually deleting entries from sys.modules might help,
either with or without the list of modules.
ChrisA
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Re: static statements and thread safety
On Thu, Sep 22, 2011 at 2:06 AM, Chris Angelico ros...@gmail.com wrote:
On Thu, Sep 22, 2011 at 5:45 PM, Eric Snow ericsnowcurren...@gmail.com
wrote:
I would expect that static variables would work pretty much the same
way as default arguments
Could you just abuse default arguments to accomplish this?
def accumulate(n,statics={'sum':0}):
statics['sum']+=n
return statics['sum']
accumulate(1)
1
accumulate(10)
11
accumulate(20)
31
accumulate(14)
45
This eliminates any sort of end of function write-back by writing to
static storage immediately. Of course, syntactic assistance would make
this look cleaner, for instance:
def accumulate(n):
static sum=0
sum+=n
return sum
Both of these would, of course, have thread-safety issues. But these
can be resolved by figuring out exactly what you're trying to
accomplish with your static data, and what it really means when two
threads are affecting it at once.
That's a good point. So, isn't the default arguments hack in the same
boat with regards to threads?
Maybe I'm just misunderstanding the thread concept in Python. Threads
have separate execution stacks but share interpreter global state,
right?
-eric
ChrisA
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Re: Graphing
I'm using matplotlib and I'm happy with it. Quick plotting is easy using the pyplot interface, which resembles the popular software package MATLAB. As your ambitions grow, matplotlib has many sophisticated tools waiting for you. -- http://mail.python.org/mailman/listinfo/python-list
Re: static statements and thread safety
On Thu, Sep 22, 2011 at 6:16 PM, Eric Snow ericsnowcurren...@gmail.com wrote: That's a good point. So, isn't the default arguments hack in the same boat with regards to threads? Maybe I'm just misunderstanding the thread concept in Python. Threads have separate execution stacks but share interpreter global state, right? I would say it probably is, but others on this list will know more of threading in Python. I tend not to write multithreaded programs in Python - the main reason for me to use Python is rapid scriptwriting, which usually doesn't demand threads. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Odd behavior with imp.reload and logging
On Wed, 21 Sep 2011 23:47:55 -0500, Andrew Berg wrote: On 2011.09.21 11:22 PM, Steven D'Aprano wrote: You could try something like this (untested): That works. Thanks! This makes me wonder what else stays around after a reload Practically everything. A reload doesn't delete anything, except as a side-effect of running the module again. Don't think of reloading as: * Revert anything the module is responsible for. * Delete the module object from the import cache. * Import the module in a fresh environment. Instead, think of it as: * Re-import the module in the current environment. In practice, you won't often see such side-effects, because most modules don't store state outside of themselves. If they store state *inside* themselves, then they will (almost always) overwrite that state. E.g. this will work as expected: state = [something] But this leaves state hanging around in other modules and will be surprising: import another_module another_module.state.append(something) My guess is that the logging module uses a cache to save the logger, hence there is state inadvertently stored outside your module. Another place where reload() doesn't work as expected: import module a = module.MyClass() reload(module) module 'module' from 'module.pyc' b = module.MyClass() type(a) is type(b) False Objects left lying around from before the reload will keep references open to the way things were before the reload. This often leads to confusion when modules are edited, then reloaded. (Been there, done that.) -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Odd behavior with imp.reload and logging
On 2011.09.22 03:25 AM, Steven D'Aprano wrote:
Objects left lying around from before the reload will keep references
open to the way things were before the reload. This often leads to
confusion when modules are edited, then reloaded. (Been there, done that.)
I'll keep that in mind. My module does have a class, but instances are
kept inside dictionaries, which are explicitly set to {} at the
beginning (can't use the update() method for dictionaries that don't
exist). Also, class instances get pickled after creation and unpickled
when the module is imported.
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python install on locked down windows box?
Hi All, Is there a way to install python on a locked down Windows desktop? (ie: no compilers, no admin rights, etc) cheers, Chris -- Simplistix - Content Management, Batch Processing Python Consulting - http://www.simplistix.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: python install on locked down windows box?
You could try Portable Python (http://www.portablepython.com). No need to install anything! -- http://mail.python.org/mailman/listinfo/python-list
Re: Environment variables not visible from Python
Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes: I don't understand why some environment variables are not visible from Python. Not all variables are environment variables. Variables only become environment variables if exported to the environment; the ‘export’ command is one way to do that. -- \ “As far as the laws of mathematics refer to reality, they are | `\not certain, and as far as they are certain, they do not refer | _o__) to reality.” —Albert Einstein, 1983 | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Context manager with class methods
Hi, On Python 2.6 and 3.1 the following code works fine: class Foo(object): @classmethod def __enter__(cls): print(__enter__) @classmethod def __exit__(cls, exc_type, exc_value, traceback): print(__exit__) with Foo: pass However, in 2.7 and 3.2 I get: Traceback (most recent call last): File stdin, line 1, in module AttributeError: __exit__ Is this a regression or a deliberate change? Off the top of my head I can't think that this pattern is particularly useful, but it seems like something that ought to work. Gavin. -- http://mail.python.org/mailman/listinfo/python-list
httplib's HEAD request, and https protocol
Hi,
I wrote a function to get thorugh redirections and find a final page for a
given web-page. But following function gives maximum recursion error for any
https pages I tried. Do you know what might be the problem here?
def getHeadResponse(url,response_cache = {}):
try:
return response_cache[url]
except KeyError:
url = urlparse.urlparse(url)
conn = httplib.HTTPConnection(url.netloc)
try:
conn.request(HEAD,url.path)
except:
# Anything can happen, this is SPARTA!
return None
response = conn.getresponse()
response_cache[url.geturl()] = response
return response
def getFinalUrl(url):
Navigates through redirections to get final url.
response = getHeadResponse(url)
try:
if str(response.status).startswith(3):
return getFinalUrl(response.getheader(location))
except AttributeError:
pass
return url
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Execute code after Shut Down command given --- How?
I would like to execute some Python code (popup message to be displayed) when Windows Vista/7 is shut down. That is, this code should execute after Shut Down is given from the Shut Down Windows popup, but before the actual shut down sequence starts. How to write Python code to accomplish this task? -- http://mail.python.org/mailman/listinfo/python-list
Re: Environment variables not visible from Python
Ben Finney wrote: Steven D'Aprano steve+comp.lang.pyt...@pearwood.info writes: I don't understand why some environment variables are not visible from Python. Not all variables are environment variables. Variables only become environment variables if exported to the environment; the ‘export’ command is one way to do that. I see. Thank you to everyone who answered. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute code after Shut Down command given --- How?
Virgil Stokes wrote: I would like to execute some Python code (popup message to be displayed) when Windows Vista/7 is shut down. That is, this code should execute after Shut Down is given from the Shut Down Windows popup, but before the actual shut down sequence starts. How to write Python code to accomplish this task? Exactly the same way you would write it in any other language. This is not a Python question. It is a Windows question: How do I execute code after the user calls Shut Down Windows, but before the shut down sequence starts? Find out how to do that, and then do it using Python instead of another language. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Negativ nearest interger?
Have a simple question in the Integer calculator in Python 2.65 and also 2.7.. The consol showing: Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) [GCC 4.4.3] on linux2 Type help, copyright, credits or license for more information. 7.0/3 #fist to show floiting-point calculation 2.3335 -7.0/3 -2.3335 -7/-3 #Rounding to nearest interger. 2 7/3 2 7/-3 #Now to the problem with interger rounding with negative anwser. -3 -7/3 -3 -3 are more wrong than -2. Negativ number seems not to round to nearest interger, but the integer UNDER the anwser!! Or? Why? -- http://mail.python.org/mailman/listinfo/python-list
Re: httplib's HEAD request, and https protocol
Ok, nevermind. Appereantly there is such a thing as HTTPSConnection. I
thought httplib auto-handled https connections..
22 Eylül 2011 13:43 tarihinde Yaşar Arabacı yasar11...@gmail.com yazdı:
Hi,
I wrote a function to get thorugh redirections and find a final page for a
given web-page. But following function gives maximum recursion error for any
https pages I tried. Do you know what might be the problem here?
def getHeadResponse(url,response_cache = {}):
try:
return response_cache[url]
except KeyError:
url = urlparse.urlparse(url)
conn = httplib.HTTPConnection(url.netloc)
try:
conn.request(HEAD,url.path)
except:
# Anything can happen, this is SPARTA!
return None
response = conn.getresponse()
response_cache[url.geturl()] = response
return response
def getFinalUrl(url):
Navigates through redirections to get final url.
response = getHeadResponse(url)
try:
if str(response.status).startswith(3):
return getFinalUrl(response.getheader(location))
except AttributeError:
pass
return url
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Re: Negativ nearest interger?
joni writes: Have a simple question in the Integer calculator in Python 2.65 and also 2.7.. The consol showing: Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) ... -7/3 -3 -3 are more wrong than -2. Negativ number seems not to round to nearest interger, but the integer UNDER the anwser!! Or? Why? It simply does not round to the nearest integer. It floors. This has nicer mathematical properties. In particular, it allows the remainder (notated as per cent) operation (n % m) to return a number that differs from n by a multiple of m (is congruent to n modulo m). These two operations go together. -- http://mail.python.org/mailman/listinfo/python-list
Re: Environment variables not visible from Python
Am 22.09.2011 12:16 schrieb Ben Finney: -- \ “As far as the laws of mathematics refer to reality, they are | `\not certain, and as far as they are certain, they do not refer | _o__) to reality.” —Albert Einstein, 1983 | Ben Finney So, he said what in 1983? Wow. -- http://mail.python.org/mailman/listinfo/python-list
Re: Context manager with class methods
Am 22.09.2011 12:21 schrieb Gavin Panella: Hi, On Python 2.6 and 3.1 the following code works fine: class Foo(object): @classmethod def __enter__(cls): print(__enter__) @classmethod def __exit__(cls, exc_type, exc_value, traceback): print(__exit__) with Foo: pass However, in 2.7 and 3.2 I get: Traceback (most recent call last): File stdin, line 1, inmodule AttributeError: __exit__ Same here. But with Foo(): pass works, and that is more important and more logical. Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: Environment variables not visible from Python
Thomas Rachel writes: Am 22.09.2011 12:16 schrieb Ben Finney: -- \ “As far as the laws of mathematics refer to reality, they are | `\not certain, and as far as they are certain, they do not refer | _o__) to reality.” —Albert Einstein, 1983 | Ben Finney So, he said what in 1983? Wow. Or at least, in a work of his published in 1983: “Sidelights on Relativity”. According to Wikiquote, anyway URL:https://secure.wikimedia.org/wikiquote/en/wiki/Albert_Einstein. -- \ “[Entrenched media corporations will] maintain the status quo, | `\ or die trying. Either is better than actually WORKING for a | _o__) living.” —ringsnake.livejournal.com, 2007-11-12 | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: Context manager with class methods
Gavin Panella wrote: Hi, On Python 2.6 and 3.1 the following code works fine: class Foo(object): @classmethod def __enter__(cls): print(__enter__) @classmethod def __exit__(cls, exc_type, exc_value, traceback): print(__exit__) with Foo: pass However, in 2.7 and 3.2 I get: Traceback (most recent call last): File stdin, line 1, in module AttributeError: __exit__ Is this a regression or a deliberate change? Off the top of my head I can't think that this pattern is particularly useful, but it seems like something that ought to work. This seems to work: class MetaWith (type): @classmethod def __enter__(cls): print(__enter__) @classmethod def __exit__(cls, exc_type, exc_value, traceback): print(__exit__) class With (object): __metaclass__ = MetaWith with With: pass Mel. -- http://mail.python.org/mailman/listinfo/python-list
Re: Context manager with class methods
Mel wrote: This seems to work: class MetaWith (type): @classmethod def __enter__(cls): print(__enter__) @classmethod def __exit__(cls, exc_type, exc_value, traceback): print(__exit__) class With (object): __metaclass__ = MetaWith with With: pass It seems to work equally well without the `@classmethod`s Mel. -- http://mail.python.org/mailman/listinfo/python-list
Re: python install on locked down windows box?
Chris Withers wrote: Hi All, Is there a way to install python on a locked down Windows desktop? (ie: no compilers, no admin rights, etc) (1) Bribe or blackmail the fascist system administrator. (2) Hack into the system with any of dozens of unpatched vulnerabilities that will give you admin rights. (3) Sneak into the office at 3 in the morning and replace the desktop with an identical machine which you have admin rights to. (4) Guess the admin password -- it's not hard, most fascist system administrators can't remember words with more than four letters, so the password is probably something like passw or, if he's being especially cunning, drows. (5) Accidentally install Linux on the machine and use that instead. (6) Take hostages. (7) If all else fails, as an absolute last resort, simply run the Windows installer as a regular, unprivileged user, after selecting the option for a Non-Admin Install under Advanced Options first. You could also try the ActivePython installer. http://www.richarddooling.com/index.php/2006/03/14/python-on-xp-7-minutes-to-hello-world/ http://diveintopython.org/installing_python/windows.html -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Negativ nearest interger?
On Sep 22, 1:44 pm, Jussi Piitulainen jpiit...@ling.helsinki.fi wrote: joni writes: Have a simple question in the Integer calculator in Python 2.65 and also 2.7.. The consol showing: Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) ... -7/3 -3 -3 are more wrong than -2. Negativ number seems not to round to nearest interger, but the integer UNDER the anwser!! Or? Why? It simply does not round to the nearest integer. It floors. This has nicer mathematical properties. In particular, it allows the remainder (notated as per cent) operation (n % m) to return a number that differs from n by a multiple of m (is congruent to n modulo m). These two operations go together. Thanx. See if I can understand it /Cheers -- http://mail.python.org/mailman/listinfo/python-list
Re: static statements and thread safety
On 22/09/2011 08:45, Eric Snow wrote: A recent thread on the python-ideas list got me thinking about the possibility of a static statement (akin to global and nonlocal). I am wondering if an implementation would have to address thread safety concerns. I would expect that static variables would work pretty much the same way as default arguments, with a list of names on the code object and a list of values on the function object. And I would guess that the values from the static variables would get updated on the function object at the end of the call. If multiple threads are executing the function at the same time won't there be a problem with that end-of-call update? It's no different from using a global, except that it's not in the global (module) namespace, but attached to a function object. -eric p.s. It probably shows that I haven't done a lot of thread-related programming, so perhaps this is not a hard question. -- http://mail.python.org/mailman/listinfo/python-list
ANN: Urwid 1.0.0 - Console UI Library
Announcing Urwid 1.0.0 -- Urwid home page: http://excess.org/urwid/ Manual: http://excess.org/urwid/wiki/UrwidManual Tarball: http://excess.org/urwid/urwid-1.0.0.tar.gz About this release: === This is a major feature release for Urwid: It's the first official release that has support for Python 3. There's a new experimental Terminal widget so you can terminal while you terminal or write a screen-clone. There's a new example showing how to serve Urwid interfaces to many users simultaneously over ssh with Twisted. There are new classes to help with creating dynamic tree views of anything you have that's tree-like. There are new widgets for working with pop-ups so you can now have all the menu bars, drop-downs and combo-boxes you can write. The old requirement to sprinkle draw_screen() calls around your callbacks is gone. Urwid now updates the screen automatically after everything else is done. There's a new simple MainLoop method for catching updates from other threads and processes. No need to manually fumble with os.pipe() and event loops. And lots more... Happy 1.0 Urwid! It's been a great nearly-seven years since our first release. Huge thanks to everyone that's contributed code, docs, bug reports and help on the mailing list and IRC. New in this release: * New support for Python 3.2 from the same 2.x code base, requires distribute instead of setuptools (by Kirk McDonald, Wendell, Marien Zwart) everything except TwistedEventLoop and GLibEventLoop is supported * New experimental Terminal widget with xterm emulation and terminal.py example program (by aszlig) * Edit widget now supports a mask (for passwords), has a insert_text_result() method for full-field validation and normalizes input text to Unicode or bytes based on the caption type used * New TreeWidget, TreeNode, ParentNode, TreeWalker and TreeListBox classes for lazy expanding/collapsing tree views factored out of browse.py example program, with new treesample.py example program (by Rob Lanphier) * MainLoop now calls draw_screen() just before going idle, so extra calls to draw_screen() in user code may now be removed * New MainLoop.watch_pipe() method for subprocess or threaded communication with the process/thread updating the UI, and new subproc.py example demonstrating its use * New PopUpLauncher and PopUpTarget widgets and MainLoop option for creating pop-ups and drop-downs, and new pop_up.py example program * New twisted_serve_ssh.py example (by Ali Afshar) that serves multiple displays over ssh from the same application using Twisted and the TwistedEventLoop * ListBox now includes a get_cursor_coords() method, allowing nested ListBox widgets * Columns widget contents may now be marked to always be treated as flow widgets for mixing flow and box widgets more easily * New lcd_display module with support for CF635 USB LCD panel and lcd_cf635.py example program with menus, slider controls and a custom font * Shared command_map instance is now stored as Widget._command_map class attribute and may be overridden in subclasses or individual widgets for more control over special keystrokes * Overlay widget parameters may now be adjusted after creation with set_overlay_parameters() method * New WidgetPlaceholder widget useful for swapping widgets without having to manipulate a container widget's contents * LineBox widgets may now include title text * ProgressBar text content and alignment may now be overridden * Use reactor.stop() in TwistedEventLoop and document that Twisted's reactor is not designed to be stopped then restarted * curses_display now supports AttrSpec and external event loops (Twisted or GLib) just like raw_display * raw_display and curses_display now support the IBMPC character set (currently only used by Terminal widget) * Fix for a gpm_mev bug preventing user input when on the console * Fix for leaks of None objects in str_util extension * Fix for WidgetWrap and AttrMap not working with fixed widgets * Fix for a lock up when attempting to wrap text containing wide characters into a single character column About Urwid === Urwid is a console UI library for Python. It features fluid interface resizing, Unicode support, multiple text layouts, simple attribute markup, powerful scrolling list boxes and flexible interface design. Urwid is released under the GNU LGPL. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python deadlock using subprocess.popen and communicate
On Sep 22, 12:24 am, Thomas Rachel nutznetz-0c1b6768-bfa9-48d5- a470-7603bd3aa...@spamschutz.glglgl.de wrote: Am 22.09.2011 05:42 schrieb Atherun: I'm pretty sure thats the problem, this is a generic catch all function for running subprocesses. It can be anything to a simple command to a complex command with a ton of output. I'm looking for a better solution to handle the case of running subprocesses that have an undetermined amount of output. Just handle process.stdout/stderr by yourself - read it out until EOF and then wait() for the process. Thomas Thats what confuses me though, the documentation says process.stdout.read()/stderr.read() can deadlock and apparently so can communicate, how do you read the stdout/stderr on yourself if its documented using them can cause a deadlock? -- http://mail.python.org/mailman/listinfo/python-list
Decision on python technologies
Hi Guys, I have been a python developer for a bit now and for the life of me I am not being able to decide something. I am trying to develop a web based application in python. I am torn between using python 2 or 3. All the good frameworks are still in 2.x. Now, cherrypy, sqlalchemy and jinja2 support python 3. But do I really want to do all the boilerplate work again? I have this strong urge to use python 3 and call it my indecisiveness , I am somehow not wanting to use 2.x, though it has everything I need to build my app. Hence, I finally decided to turn to the community for helping me make this decision. Please help. Regards, Nav -- http://mail.python.org/mailman/listinfo/python-list
Re: [ANNC] pynguin-0.12 (fixes problems running on Windows)
Thank you! My kids *love* it. -- http://mail.python.org/mailman/listinfo/python-list
Re: Environment variables not visible from Python
On Thu, 22 Sep 2011 09:21:59 +0200, Thomas Rachel wrote: [snip] $ python -c 'import os; print \n.join(sorted(%s=%s % (k,v) for k,v in os.environ.iteritems()))' | diff -u - (env|LANG=C sort) [standing ovation] -- To email me, substitute nowhere-spamcop, invalid-net. -- http://mail.python.org/mailman/listinfo/python-list
random.randint() slow, esp in Python 3
The standard library function random.randint() seems to be quite slow compared to random.random(), and worse in Python 3 than Python 2 (specifically that's 3.3a0 latest from Mercurial, and 2.6.6 that came default on my Ubuntu install). My test involves building a list of one million random integers between 0 and ten million (for tinkering with sorting algorithms), using a list comprehension: import random import time sz=100 start=time.time() a=[random.randint(0,sz*10-1) for i in range(sz)] print(Time taken: ,time.time()-start) The code works fine in either version of Python (although the display looks a bit odd in Py2). But on my test system, it takes about 5 seconds to run in Py2, and about 10 seconds for Py3. (The obvious optimization of breaking sz*10-1 out and storing it in a variable improves both times, but leaves the dramatic difference.) Replacing randint with random(): a=[int(random.random()*top) for i in range(sz)] cuts the times down to about 1.5 secs for Py2, and 1.8 secs for Py3. I suspect that the version difference is (at least in part) due to the merging of the 'int' and 'long' types in Py3. This is supported experimentally by rerunning the second list comp but using int() in place of long() - the time increases to about 1.7-1.8 secs, matching Py3. But this still doesn't explain why randint() is so much slower. In theory, randint() should be doing basically the same thing that I've done here (multiply by the top value, truncate the decimal), only it's in C instead of Python - if anything, it should be faster than doing it manually, not slower. A minor point of curiosity, nothing more... but, I think, a fascinating one. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Python deadlock using subprocess.popen and communicate
On Thu, 22 Sep 2011 08:55:40 -0700, Atherun wrote: Just handle process.stdout/stderr by yourself - read it out until EOF and then wait() for the process. Thats what confuses me though, the documentation says process.stdout.read()/stderr.read() can deadlock and apparently so can communicate, how do you read the stdout/stderr on yourself if its documented using them can cause a deadlock? If you try to read/write two or more of stdin/stdout/stderr via the naive approach, you run the risk of the child process writing more than a pipe's worth of data to one stream (and thus blocking) while the parent is performing a blocking read/write on another stream, resulting in deadlock. The .communicate() method avoids the deadlock by either: 1. On Unix, using non-blocking I/O and select(), or 2. On Windows, creating a separate thread for each stream. Either way, the result is that it can always read/write whichever streams are ready, so the child will never block indefinitely while waiting for the parent. If .communicate() is blocking indefinitely, it suggests that the child process never terminates. There are many reasons why this might happen, and most of them depend upon exactly what the child process is doing. I suggest obtaining a copy of Process Explorer, and using it to investigate the state of both processes (but especially the child) at the point that the deadlock seems to occur. -- http://mail.python.org/mailman/listinfo/python-list
Re: Decision on python technologies
On 9/22/2011 9:00 AM Navkirat Singh said... Hi Guys, I have been a python developer for a bit now and for the life of me I am not being able to decide something. I am trying to develop a web based application in python. I am torn between using python 2 or 3. All the good frameworks are still in 2.x. Now, cherrypy, sqlalchemy and jinja2 support python 3. But do I really want to do all the boilerplate work again? I have this strong urge to use python 3 and call it my indecisiveness , I am somehow not wanting to use 2.x, though it has everything I need to build my app. Hence, I finally decided to turn to the community for helping me make this decision. I'd consider the development timeframe -- if it'll still be under development within the timeframe of migration and availability of desired tools then I'd start with 3 and focus on those parts that can be worked on. If your development timeframe is measured in weeks instead of quarters or years, I'd just get it done with 2. Emile -- http://mail.python.org/mailman/listinfo/python-list
Re: random.randint() slow, esp in Python 3
Chris Angelico wrote: The standard library function random.randint() seems to be quite slow compared to random.random(), and worse in Python 3 than Python 2 [...] But this still doesn't explain why randint() is so much slower. In theory, randint() should be doing basically the same thing that I've done here (multiply by the top value, truncate the decimal), only it's in C instead of Python - if anything, it should be faster than doing it manually, not slower. What makes you think it's in C? I don't have Python 3.3a, but in 3.2 the random module is mostly Python. There is an import of _random, which presumably is in C, but it doesn't have a randint method: import _random _random.Random.randint Traceback (most recent call last): File stdin, line 1, in module AttributeError: type object '_random.Random' has no attribute 'randint' I'm not seeing any significant difference in speed between 2.6 and 3.2: [steve@sylar ~]$ python2.6 -m timeit -s from random import randint randint(0, 100) 10 loops, best of 3: 4.29 usec per loop [steve@sylar ~]$ python3.2 -m timeit -s from random import randint randint(0, 100) 10 loops, best of 3: 4.98 usec per loop (The times are quite variable: the above are the best of three attempts.) -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Python deadlock using subprocess.popen and communicate
On Sep 22, 10:44 am, Nobody nob...@nowhere.com wrote: On Thu, 22 Sep 2011 08:55:40 -0700, Atherun wrote: Just handle process.stdout/stderr by yourself - read it out until EOF and then wait() for the process. Thats what confuses me though, the documentation says process.stdout.read()/stderr.read() can deadlock and apparently so can communicate, how do you read the stdout/stderr on yourself if its documented using them can cause a deadlock? If you try to read/write two or more of stdin/stdout/stderr via the naive approach, you run the risk of the child process writing more than a pipe's worth of data to one stream (and thus blocking) while the parent is performing a blocking read/write on another stream, resulting in deadlock. The .communicate() method avoids the deadlock by either: 1. On Unix, using non-blocking I/O and select(), or 2. On Windows, creating a separate thread for each stream. Either way, the result is that it can always read/write whichever streams are ready, so the child will never block indefinitely while waiting for the parent. If .communicate() is blocking indefinitely, it suggests that the child process never terminates. There are many reasons why this might happen, and most of them depend upon exactly what the child process is doing. I suggest obtaining a copy of Process Explorer, and using it to investigate the state of both processes (but especially the child) at the point that the deadlock seems to occur. In the one case I can easily reproduce, its in a p4.exe call that I'm making both python and p4.exe have nearly the same stack for their threads: python: ntoskrnl.exe!memset+0x64a ntoskrnl.exe!KeWaitForMultipleObjects+0xd52 ntoskrnl.exe!KeWaitForMutexObject+0x19f ntoskrnl.exe!__misaligned_access+0xba4 ntoskrnl.exe!__misaligned_access+0x1821 ntoskrnl.exe!KeWaitForMultipleObjects+0xf5d ntoskrnl.exe!KeWaitForMutexObject+0x19f ntoskrnl.exe!NtWaitForSingleObject+0xde ntoskrnl.exe!KeSynchronizeExecution+0x3a43 wow64cpu.dll!TurboDispatchJumpAddressEnd+0x6c0 wow64cpu.dll!TurboDispatchJumpAddressEnd+0x4a8 wow64.dll!Wow64SystemServiceEx+0x1ce wow64.dll!Wow64LdrpInitialize+0x429 ntdll.dll!RtlUniform+0x6e6 ntdll.dll!RtlCreateTagHeap+0xa7 ntdll.dll!LdrInitializeThunk+0xe ntdll.dll!ZwWaitForSingleObject+0x15 kernel32.dll!WaitForSingleObjectEx+0x43 kernel32.dll!WaitForSingleObject+0x12 python26.dll!_Py_svnversion+0xcf8 p4: ntoskrnl.exe!memset+0x64a ntoskrnl.exe!KeWaitForMultipleObjects+0xd52 ntoskrnl.exe!KeWaitForSingleObject+0x19f ntoskrnl.exe!_misaligned_access+0xba4 ntoskrnl.exe!_misaligned_access+0x1821 ntoskrnl.exe!KeWaitForMultipleObjects+0xf5d ntoskrnl.exe!KeWaitForSingleObject+0x19f ntoskrnl.exe!NtCreateFile+0x4c9 ntoskrnl.exe!NtWriteFile+0x7e3 ntoskrnl.exe!KeSynchronizeExecution+0x3a43 ntdll.dll!ZwWriteFile+0xa KERNELBASE.dll!WriteFile+0x7b kernel32.dll!WriteFile+0x36 p4.exe+0x42d4b p4.exe+0x42ed8 To me it looks like they're both waiting on each other. -- http://mail.python.org/mailman/listinfo/python-list
Python Mixins
I'm curious about what people's opinions are about using mixins in Python. I really like, for example, the way that class based views were implemented in Django 1.3 using mixins. It makes everything extremely customizable and reusable. I think this is a very good practice to follow, however, in Python mixins are achieved by using (or perhaps misusing) inheritance and often multiple inheritance. Inheritance is a very powerful tool, and multiple inheritance is an even more powerful tool. These tools have their uses, but I feel like mixing in functionality is not one of them. There are much different reasons and uses for inheriting functionality from a parent and mixing in functionality from elsewhere. As a person, you learn certain things from your parents, you learn other things from your peers all of those things put together becomes you. Your peers are not your parents, that would not be possible. You have completely different DNA and come from a completely different place. In terms of code, lets say we have the following classes: class Animal class Yamlafiable class Cat(Animal, Yamlafiable) class Dog(Animal, Yamlafiable) I've got an Animal that does animal things, a Cat that does cat things and a Dog that does dog things. I've also got a Yamlafiable class that does something clever to generically convert an object into Yaml in some way. Looking at these classes I can see that a Cat is an Animal, a Dog is an Animal, a Dog is not a Cat, a Cat is not a Dog, a Dog is a Yamlafiable? and a Cat is a Yamlafiable? Is that really true? If my objects are categorized correctly, in the correct inheritance hierarchy shouldn't that make more sense? Cats and Dogs aren't Yamlafiable, that doesn't define what they are, rather it defines something that they can do because of things that they picked up from their friend the Yamlafile. This is just a ridiculous example, but I think it is valid to say that these things shouldn't be limited to inherit functionality only from their parents, that they can pick other things up along the way as well. Which is easy to do, right? Dog.something_new = something_new (I wish my stupid dog would learn that easily) Ideally, what I would like to see is something like Ruby's mixins. It seems to me like Ruby developed this out of necessity due to the fact that it does not support multiple inheritance, however I think the implementation is much more pure than inheriting from things that aren't your parents. (although having only a single parent doesn't make much sense either, I believe there are very few actual documented cases of that happening). Here is a Ruby snippet: module ReusableStuff def one_thing something cool end end class MyClass MyParent include ReusableStuff end x = MyClass.new x.one_thing == something cool MyClass.superclass == Object So I'm inheriting from MyParent and mixing in additional functionality from ReusableStuff without affecting who my Parents are. This, to me, makes much more sense than using inheritance to just grab a piece of functionality that I want to reuse. I wrote a class decorator for Python that does something similar (https://gist.github.com/1233738) here is a snippet from that: class MyMixin(object): def one_thing(self): return something cool @mixin(MyMixin) class MyClass(object): pass x = MyClass() x.one_thing() == 'something cool' x.__class__.__bases__ == (object,) To me, this is much more concise. By looking at this I can tell what MyClass IS, who it's parents are and what else it can do. I'm very interested to know if there are others who feel as dirty as I do when using inheritance for mixins or if there are other things that Python developers are doing to mix in functionality without using inheritance or if the general populous of the Python community disagrees with me and thinks that this is a perfectly valid use of inheritance. I look forward to hearing back. Thanks, Matthew J Morrison www.mattjmorrison.com P.S. - This is a good article about not using inheritance as a code reuse tool: http://littletutorials.com/2008/06/23/inheritance-not-for-code-reuse/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Mixins
On Sep 22, 4:14 pm, Matt mattj.morri...@gmail.com wrote: (although having only a single parent doesn't make much sense either, I believe there are very few actual documented cases of that happening). There is nothing wrong with an object having only one parent. Most times the reasons are for maintainability. I might have a TextEditor that exposes all the generic functionality that are ubiquitous to text editors and then a FancyTextEditor(TextEditor) that exposes functionality that is unique to a confined set of text editing uses. A silly example, but proves the point. Do not judge an object by the number of prodigy. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Mixins
On 2011-09-22 23:14, Matt wrote: I'm curious about what people's opinions are about using mixins in Python. I really like, for example, the way that class based views were implemented in Django 1.3 using mixins. It makes everything extremely customizable and reusable. I think this is a very good practice to follow, however, in Python mixins are achieved by using (or perhaps misusing) inheritance and often multiple inheritance. Inheritance is a very powerful tool, and multiple inheritance is an even more powerful tool. These tools have their uses, but I feel like mixing in functionality is not one of them. There are much different reasons and uses for inheriting functionality from a parent and mixing in functionality from elsewhere. As a person, you learn certain things from your parents, you learn other things from your peers all of those things put together becomes you. Your peers are not your parents, that would not be possible. You have completely different DNA and come from a completely different place. In terms of code, lets say we have the following classes: class Animal class Yamlafiable class Cat(Animal, Yamlafiable) class Dog(Animal, Yamlafiable) I think this is an excellent use of multiple inheritance. One could also have a construction like this: class Dog (Animal) class YamlafialbleDog (Dog, Yamlafiable) ... which you may be more comfortable with. In you above example, yes, a Dog object is a Yamlafiable object. If you need a Yamlafiable object, you can use a Cat or Dog. That's what inheritance is about. In Python or Ruby, this way of doing things is not all that different from the one you present below. Here, it doesn't really matter. In strictly typed languages, it makes a world of difference. What if you don't care what kind of object you're dealing with, as long as it supports the interface a certain mixin provides? In Python, true, duck typing will do the trick. In C++, for example, where you could use the C preprocessor to do something like Ruby mixins, multiple inheritance is a lot more useful for mixing in something that has a public interface. The Vala language, and, I suppose the GObject type system, actually allows interfaces to act as mixins. This is really a more formalised way of doing just this: using multiple inheritance (which, beyond interfaces, Vala does not support) to mix in functionality. Oh and your thing looks kind of neat. Thomas I've got an Animal that does animal things, a Cat that does cat things and a Dog that does dog things. I've also got a Yamlafiable class that does something clever to generically convert an object into Yaml in some way. Looking at these classes I can see that a Cat is an Animal, a Dog is an Animal, a Dog is not a Cat, a Cat is not a Dog, a Dog is a Yamlafiable? and a Cat is a Yamlafiable? Is that really true? If my objects are categorized correctly, in the correct inheritance hierarchy shouldn't that make more sense? Cats and Dogs aren't Yamlafiable, that doesn't define what they are, rather it defines something that they can do because of things that they picked up from their friend the Yamlafile. This is just a ridiculous example, but I think it is valid to say that these things shouldn't be limited to inherit functionality only from their parents, that they can pick other things up along the way as well. Which is easy to do, right? Dog.something_new = something_new (I wish my stupid dog would learn that easily) Ideally, what I would like to see is something like Ruby's mixins. It seems to me like Ruby developed this out of necessity due to the fact that it does not support multiple inheritance, however I think the implementation is much more pure than inheriting from things that aren't your parents. (although having only a single parent doesn't make much sense either, I believe there are very few actual documented cases of that happening). Here is a Ruby snippet: module ReusableStuff def one_thing something cool end end class MyClass MyParent include ReusableStuff end x = MyClass.new x.one_thing == something cool MyClass.superclass == Object So I'm inheriting from MyParent and mixing in additional functionality from ReusableStuff without affecting who my Parents are. This, to me, makes much more sense than using inheritance to just grab a piece of functionality that I want to reuse. I wrote a class decorator for Python that does something similar (https://gist.github.com/1233738) here is a snippet from that: class MyMixin(object): def one_thing(self): return something cool @mixin(MyMixin) class MyClass(object): pass x = MyClass() x.one_thing() == 'something cool' x.__class__.__bases__ == (object,) To me, this is much more concise. By looking at this I can tell what MyClass IS, who it's parents are and what else it can do. I'm very interested to know if there are others who feel as dirty as I
Re: Context manager with class methods
On 9/22/2011 6:21 AM, Gavin Panella wrote: On Python 2.6 and 3.1 the following code works fine: class Foo(object): @classmethod def __enter__(cls): print(__enter__) @classmethod def __exit__(cls, exc_type, exc_value, traceback): print(__exit__) with Foo: pass This could be regarded as a bug, see below. However, in 2.7 and 3.2 I get: Traceback (most recent call last): File stdin, line 1, inmodule AttributeError: __exit__ type(Foo) == type and type has no such attribute. Unless otherwise specified, 'method' typically means 'instance method'. In particular, the '__xxx__' special methods are (all?) (intended to be) instance methods, which is to say, functions that are attributes of an object's class. So it is normal to look for special methods on the class (and superclasses) of an object rather than starting with the object itself. For instance, when executing 'a+b', the interpreter never looks for __add__ as an attribute of a itself (in a.__dict__) but starts the search looking for with type(a).__add__ Is this a regression or a deliberate change? Off the top of my head I can't think that this pattern is particularly useful, but it seems like something that ought to work. I suspect there was a deliberate change to correct an anomaly, though this might have been done as part of some other change. As Thomas noted, *instances* of Foo work and as Mei noted, making Foo an instance of a (meta)class with the needed methods also works. -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Negativ nearest interger?
On 9/22/2011 7:44 AM, Jussi Piitulainen wrote: joni writes: Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) ... -7/3 -3 In late Python 2 you *can* and in Python 3 you *must* use // rather than / to get an int result. -3 are more wrong than -2. Negativ number seems not to round to nearest interger, but the integer UNDER the anwser!! Or? Why? It simply does not round to the nearest integer. It floors. This has nicer mathematical properties. In particular, it allows the remainder (notated as per cent) operation (n % m) to return a number that differs from n by a multiple of m (is congruent to n modulo m). These two operations go together. The Python doc set has a FAQ collection. I recommend you read the questions for those you might be interested in. In the Programming FAQ: Why does -22 // 10 return -3? It’s primarily driven by the desire that i % j have the same sign as j. If you want that, and also want: i == (i // j) * j + (i % j) then integer division has to return the floor. C also requires that identity to hold, and then compilers that truncate i // j need to make i % j have the same sign as i. There are few real use cases for i % j when j is negative. When j is positive, there are many, and in virtually all of them it’s more useful for i % j to be = 0. If the clock says 10 now, what did it say 200 hours ago? -190 % 12 == 2 is useful; -190 % 12 == -10 is a bug waiting to bite. -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: random.randint() slow, esp in Python 3
On Fri, Sep 23, 2011 at 4:14 AM, Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote: What makes you think it's in C? I don't have Python 3.3a, but in 3.2 the random module is mostly Python. There is an import of _random, which presumably is in C, but it doesn't have a randint method: True. It seems to be defined in cpython/lib/random.py as a reference to randrange, which does a pile of error checking and calls _randbelow... which does a whole lot of work as well as calling random(). Guess I should have checked the code before asking! There's probably good reasons for using randint(), but if you just want a pile of more-or-less random integers, int(random.random()*top) is the best option. I'm not seeing any significant difference in speed between 2.6 and 3.2: [steve@sylar ~]$ python2.6 -m timeit -s from random import randint randint(0, 100) 10 loops, best of 3: 4.29 usec per loop [steve@sylar ~]$ python3.2 -m timeit -s from random import randint randint(0, 100) 10 loops, best of 3: 4.98 usec per loop That might be getting lost in the noise. Try the list comp that I had above and see if you can see a difference - or anything else that calls randint that many times. Performance-testing with a heapsort (and by the way, it's _ridiculously_ slower implementing it in Python instead of just calling a.sort(), but we all knew that already!) shows a similar difference in performance. As far as I know, everything's identical between the two (I use // division so there's no floating point getting in the way, for instance), but what takes 90 seconds on Py2 takes 150 seconds on Py3. As with the randint test, I switched int() to long() to test Py2, and that slowed it down a little, but still far far below the Py3 time. I've pasted the code I'm using here: http://pastebin.com/eQPHQhD0 Where's the dramatic performance difference? Or doesn't it matter, since anything involving this sort of operation needs to be done in C anyway? ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: PyEval_EvalCodeEx return value
On 20/09/2011 8:34 PM, Mateusz Loskot wrote: Hi, I'm trying to dig out details about what exactly is the return value the of PyEval_EvalCodeEx function in Python 3.x The documentation is sparse, unfortunately. Perhaps I'm looking at wrong function. My aim is simple, I need to execute Python code using Python interpreter embedded in my C++ application. The Python code is a simple script that always returns single value. For example: #! /usr/bin/env python def foo(a, b): return a + b f = foo(2, 3) But, f can be of different type for different script: one returns numeric value, another returns a sequence, so the type is not possible to be determined in advance. I know how to capture Python stdout/stderr. I also know how to access the f attribute using PyObject_GetAttrString and then I can convert f value to C++ type depending on PyObject type. However, I guess there shall be a way to access f value directly from PyEval_EvalCode return object: PyObject* evalRet = ::PyEval_EvalCode(...); But, I can't find any details what the evalRet actually is. Eval is to eval an expression. If you simply eval the expression f in the context of the module you should get the result returned. Obviously though it is designed to eval more complex expressions and in your specific example, doing the getattr thing will also work fine. Mark -- http://mail.python.org/mailman/listinfo/python-list
Python 2.5 zlib trouble
Hello, I am trying to deploy an app on google app engine using bottle, a micro-framework, similar to flask. I am running on ubuntu which comes with python 2.7 installed but GAE needs version 2.5, so I installed 2.5. I then realized I didn't use make altinstall so I may have a default version problem now. But my real problem is that when I try to use the gae server to test locally I get the following error: Traceback (most recent call last): File /opt/google/appengine/dev_appserver.py, line 77, in module run_file(__file__, globals()) File /opt/google/appengine/dev_appserver.py, line 73, in run_file execfile(script_path, globals_) File /opt/google/appengine/google/appengine/tools/ dev_appserver_main.py, line 156, in module from google.appengine.tools import dev_appserver File /opt/google/appengine/google/appengine/tools/ dev_appserver.py, line 94, in module import zlib ImportError: No module named zlib Can you help me with this? -- http://mail.python.org/mailman/listinfo/python-list
Re: python install on locked down windows box?
5 is the best solution, followed by 2 and 3. On Sep 22, 2011 11:02 PM, Steven Dapos;Aprano steve+comp.lang.pyt...@pearwood.info wrote: Chris Withers wrote: Hi All, Is there a way to install python on a locked down Windows desktop? (ie: no compilers, no admin rights, etc) (1) Bribe or blackmail the fascist system administrator. (2) Hack into the system with any of dozens of unpatched vulnerabilities that will give you admin rights. (3) Sneak into the office at 3 in the morning and replace the desktop with an identical machine which you have admin rights to. (4) Guess the admin password -- it's not hard, most fascist system administrators can't remember words with more than four letters, so the password is probably something like passw or, if he's being especially cunning, drows. (5) Accidentally install Linux on the machine and use that instead. (6) Take hostages. (7) If all else fails, as an absolute last resort, simply run the Windows installer as a regular, unprivileged user, after selecting the option for a Non-Admin Install under Advanced Options first. You could also try the ActivePython installer. http://www.richarddooling.com/index.php/2006/03/14/python-on-xp-7-minutes-to-hello-world/ http://diveintopython.org/installing_python/windows.html -- Steven -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
[issue13026] Dis module - documentation of MAKE_FUNCTION
Terry J. Reedy tjre...@udel.edu added the comment: Right. This opcode is the end of a sequence of opcodes that sets up the stack in the way expected. Perhaps something like Pushes a new function object on the stack. From bottom to top, the consumed stack must have have argc 0xFF positional default parameter objects, (argc 8) 0xFF keyword only name, default parameter object pairs (with name and object in separate positions), (argc 16) 0x7FFF parameter annotations, a tuple listing the parameter names for the annotations, and finally a code object as TOS. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13026 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13026] Dis module - documentation of MAKE_FUNCTION
Arnaud Delobelle arno...@googlemail.com added the comment: This reads a lot better. Perhaps change (with name and object in separate positions) to something like (with name just below object on the stack) -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13026 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1625] bz2.BZ2File doesn't support multiple streams
ozan caglayan ozan...@gmail.com added the comment: I ported the bz2ms.patch to Python 2.7.2 and it works correctly within the bz2 module. But when you open a multistream (tar)bz2 with the tarfile module, even the tarfile uses the BZ2File() class, there exists unextracted missing files. I'll now try with the current tip. -- nosy: +ozan.caglayan ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1625 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12943] tokenize: add python -m tokenize support back
Georg Brandl ge...@python.org added the comment: I don't think the help option needs to be documented, it will document itself. An additional suggestion is to catch errors on tokenizing and exiting with a non-zero exit status in these cases. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12943 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1625] bz2.BZ2File doesn't support multiple streams
ozan caglayan ozan...@gmail.com added the comment: With the current tip everything works correctly. I think it's because of the complete rewrite of the bz2 module with python and the refactoring of _bz2.so. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1625 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7133] test_ssl failure
Keith Briggs kbri...@users.sourceforge.net added the comment: I am still getting this error with SocketServer in Python 2.7.2, even though it looks the same as was fixed in Issue7133: File /usr/local/lib/python2.7/SocketServer.py, line 284, in _handle_request_noblock self.process_request(request, client_address) File /usr/local/lib/python2.7/SocketServer.py, line 310, in process_request self.finish_request(request, client_address) File /usr/local/lib/python2.7/SocketServer.py, line 323, in finish_request self.RequestHandlerClass(request, client_address, self) File /usr/local/lib/python2.7/SocketServer.py, line 641, in __init__ self.finish() File /usr/local/lib/python2.7/SocketServer.py, line 694, in finish self.wfile.flush() File /usr/local/lib/python2.7/socket.py, line 303, in flush self._sock.sendall(view[write_offset:write_offset+buffer_size]) TypeError: must be string or read-only buffer, not memoryview Keith -- nosy: +kbriggs ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7133 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue6549] ttk.Style -- minor issues with element_names and configure
Changes by Ethan Furman et...@stoneleaf.us: -- nosy: +terry.reedy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6549 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13027] python 2.6.6 interpreter core dumps on modules command from help prompt
New submission from Balachandran Sivakumar benignb...@gmail.com: From the python 2.6.6 interpreter on Debian Lenny(Debian 5.0), on invoking help(), and issuing the modules command, the interpreter seg faults, and dumps core. Also, it throws a few Deprecated warnings for modules like md5. The gdb backtrace on the core had 1 frame. attaching the bt in a separate file. Core was generated by `python'. Program terminated with signal 11, Segmentation fault. #0 0xb5d72e47 in XQueryExtension () from /usr/lib/libX11.so.6 (gdb) -- components: Interpreter Core files: python_bt.log messages: 144408 nosy: Balachandran.Sivakumar priority: normal severity: normal status: open title: python 2.6.6 interpreter core dumps on modules command from help prompt type: crash versions: Python 2.6 Added file: http://bugs.python.org/file23224/python_bt.log ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13027 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11816] Refactor the dis module to provide better building blocks for bytecode analysis
Meador Inge mead...@gmail.com added the comment: I agree that 'bytecode_instructions' is a long-winded. FWIW, I have worked on or with a fair amount instruction level things and instruction or instr seem to be the established domain terminology. Here are a few examples: * Java ASM - http://asm.ow2.org/asm33/javadoc/user/index.html - Classes named 'InsnList', 'InsnNode' * PyPy - https://bitbucket.org/pypy/pypy/src/default/pypy/interpreter/astcompiler/assemble.py - class named 'Instruction' * Python - http://hg.python.org/cpython/file/a06ef7ab7321/Python/compile.c#l45 - struct named 'instr' * binutils - http://sourceware.org/git/?p=binutils.git;a=tree - structs, variables, etc ... with use of 'insn' and 'instruction' * gcc - http://gcc.gnu.org/git/?p=gcc.git;a=tree - structs, variables, etc ... with use of 'insn' and 'instruction' -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue11816 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7475] codecs missing: base64 bz2 hex zlib hex_codec ...
Changes by Cherniavsky Beni b...@google.com: -- nosy: +cben ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7475 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13027] python 2.6.6 interpreter core dumps on modules command from help prompt
Ezio Melotti ezio.melo...@gmail.com added the comment: help(modules) imports all the modules, and you probably have some module that once imported makes the interpreter crash (maybe _keybinder? you could try importing that from the interpreter and see if it crashes). The deprecation warnings comes from deprecated modules that get imported too, maybe these could be silenced by help(). I'm not sure there's much we can do with this though, see also #12902. -- nosy: +ezio.melotti, terry.reedy ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13027 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1625] bz2.BZ2File doesn't support multiple streams
Changes by Gökçen Eraslan gok...@pardus.org.tr: -- nosy: +Gökçen.Eraslan ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1625 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13027] python 2.6.6 interpreter core dumps on modules command from help prompt
Balachandran Sivakumar benignb...@gmail.com added the comment: But this doesn't happen in other versions of python. Also what I did is something like this: bala@bala$ python ... ... help() ... ... ... help modules It is after this I see it dumping. And I see this only with 2.6.6. I have other versions in other machines(all running Debian) and none of them crash. In my opinion, a seg fault doesn't look good. Of course, if we can't do much about it, I don't have a problem closing it down. core But a segv looks bad to the beginner, who is more likely to use this. In fact, I was using that just to show a beginner how to get help :( -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13027 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13027] python 2.6.6 interpreter core dumps on modules command from help prompt
Ezio Melotti ezio.melo...@gmail.com added the comment:
Doing help('modules') and help(), help modules should be the same.
My point is that the crash is not Python's fault, but it's caused by some
extension module that gets imported by help('modules'). This module is
probably not installed on the other machines and on the same machine for other
Python versions, so it doesn't crash there. You can look on sys.path to see
the places where Python searches for the modules.
If you manage to identify the module, you could report the problem to their bug
tracker. AFAIK Python can't do anything to prevent/contain a crash while
importing an extension module.
--
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http://bugs.python.org/issue13027
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[issue13028] python wastes linux users time by checking for dylib on each dynamic library load
New submission from Roger fzvq...@v.mintemail.com:
instead it should check for linux once, store that linux is used and not even
once check for dylib
strace extract
[pid 23025] stat64(//lib/libreadline.dylib, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(//lib/libreadline.so, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(//lib/libreadline.a, 0xbfd27c1c) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(/lib64/libreadline.dylib, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/lib64/libreadline.so, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/lib64/libreadline.a, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/usr/lib64/libreadline.dylib, 0xbfd27c1c) = -1 ENOENT (No
such file or directory)
[pid 23025] stat64(/usr/lib64/libreadline.so, 0xbfd27c1c) = -1 ENOENT (No
such file or directory)
[pid 23025] stat64(/usr/lib64/libreadline.a, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/lib/libreadline.dylib, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/lib/libreadline.so, 0xbfd27c1c) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(/lib/libreadline.a, 0xbfd27c1c) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(/usr/lib/libreadline.dylib, 0xbfd27c1c) = -1 ENOENT (No
such file or directory)
[pid 23025] stat64(/usr/lib/libreadline.so, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/usr/lib/libreadline.a, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(//lib/libncursesw.dylib, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(//lib/libncursesw.so, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(//lib/libncursesw.a, 0xbfd27c1c) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(/lib64/libncursesw.dylib, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/lib64/libncursesw.so, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/lib64/libncursesw.a, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/usr/lib64/libncursesw.dylib, 0xbfd27c1c) = -1 ENOENT (No
such file or directory)
[pid 23025] stat64(/usr/lib64/libncursesw.so, 0xbfd27c1c) = -1 ENOENT (No
such file or directory)
[pid 23025] stat64(/usr/lib64/libncursesw.a, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/lib/libncursesw.dylib, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/lib/libncursesw.so, 0xbfd27c1c) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(/lib/libncursesw.a, 0xbfd27c1c) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(/usr/lib/libncursesw.dylib, 0xbfd27c1c) = -1 ENOENT (No
such file or directory)
[pid 23025] stat64(/usr/lib/libncursesw.so, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/usr/lib/libncursesw.a, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(//lib/libncurses.dylib, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(//lib/libncurses.so, 0xbfd27c1c) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(//lib/libncurses.a, {st_mode=S_IFREG|0644, st_size=431218,
...}) = 0
[pid 23025] stat64(//lib/libcrypt.dylib, 0xbfd27c1c) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(//lib/libcrypt.so, 0xbfd27c1c) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(//lib/libcrypt.a, {st_mode=S_IFREG|0644, st_size=8, ...})
= 0
[pid 23025] stat64(//include/openssl/ssl.h, {st_mode=S_IFREG|0644,
st_size=93660, ...}) = 0
[pid 23025] stat64(//include/krb5.h, 0xbfd27cac) = -1 ENOENT (No such file or
directory)
[pid 23025] stat64(./krb5.h, 0xbfd27cac) = -1 ENOENT (No such file or
directory)
[pid 23025] stat64(Include/krb5.h, 0xbfd27cac) = -1 ENOENT (No such file or
directory)
[pid 23025] stat64(./Include/krb5.h, 0xbfd27cac) = -1 ENOENT (No such file or
directory)
[pid 23025] stat64(/src/Python-2.7.2/Include/krb5.h, 0xbfd27cac) = -1 ENOENT
(No such file or directory)
[pid 23025] stat64(/src/Python-2.7.2/krb5.h, 0xbfd27cac) = -1 ENOENT (No such
file or directory)
[pid 23025] stat64(/usr/include/krb5.h, 0xbfd27cac) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(/usr/kerberos/include/krb5.h, 0xbfd27cac) = -1 ENOENT (No
such file or directory)
[pid 23025] stat64(//lib/libssl.dylib, 0xbfd27b3c) = -1 ENOENT (No such file
or directory)
[pid 23025] stat64(//lib/libssl.so, 0xbfd27b3c) = -1 ENOENT (No such file or
directory)
[pid 23025] stat64(//lib/libssl.a, {st_mode=S_IFREG|0644, st_size=448496,
...}) = 0
--
messages: 144413
nosy: fzvqedi
priority: normal
severity: normal
status: open
title: python wastes linux users time by checking for dylib on each dynamic
library load
versions: Python 2.7
___
Python tracker rep...@bugs.python.org
[issue12902] help(modules) executes module code
Ezio Melotti ezio.melo...@gmail.com added the comment: Since help(modules) just shows a list of modules without any description, maybe it could avoid importing them until further information about individual modules are requested. Also while trying to do help(modules) twice on py3k, I noticed that the second time many modules are missing from the list. Is this expected and/or a known issue? -- nosy: +rhettinger ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12902 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13028] python wastes linux users time by checking for dylib on each dynamic library load
STINNER Victor victor.stin...@haypocalc.com added the comment: The list of file extensions is written in _PyImport_DynLoadFiletab constant. This list depends on the OS. For Linux, the list is defined in: Python/dynload_shlib.c. I don't understand because in Python 2.7, Python/dynload_shlib.c doesn't contain .dylib. -- nosy: +haypo ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13028 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10141] SocketCan support
Charles-François Natali neolo...@free.fr added the comment: Here's an updated patch, with more tests. Please review! -- keywords: +needs review nosy: +haypo stage: patch review - commit review Added file: http://bugs.python.org/file23225/socketcan_v4.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10141 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13029] test_strptime fails on Windows 7 french
New submission from STINNER Victor victor.stin...@haypocalc.com:
Python 3 uses wcsftime() to format a timestamp and decodes tzname[0] and
tzname[1] from UTF-8. The problem is that both methods format the quote
differently: U+0092 for wcsftime(%Z) and U+2019 in tzname[1].
time.strftime(%Z)
'Paris, Madrid (heure d\x92été)'
time.tzname
('Paris, Madrid', 'Paris, Madrid (heure d\u2019été)')
==
ERROR: test_timezone (test.test_strptime.StrptimeTests)
--
Traceback (most recent call last):
File C:\victor\cpython\lib\test\test_strptime.py, line 303, in test_timezone
strp_output = _strptime._strptime_time(strf_output, %Z)
File C:\victor\cpython\lib\_strptime.py, line 482, in _strptime_time
tt = _strptime(data_string, format)[0]
File C:\victor\cpython\lib\_strptime.py, line 340, in _strptime
data_string[found.end():])
ValueError: unconverted data remains: (heure d\x92été)
==
FAIL: test_timezone (test.test_strptime.LocaleTime_Tests)
--
Traceback (most recent call last):
File C:\victor\cpython\lib\test\test_strptime.py, line 78, in test_timezone
(timezone, self.LT_ins.timezone))
AssertionError: False is not true : timezone paris, madrid (heure d\x92été) not
found in (frozenset({'utc', 'paris, madrid', 'gmt'}), frozenset({'paris, madrid
(heure d\u2019été)'}))
--
--
components: Unicode, Windows
messages: 144417
nosy: haypo
priority: normal
severity: normal
status: open
title: test_strptime fails on Windows 7 french
versions: Python 3.3
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[issue13029] test_strptime fails on Windows 7 french
Changes by STINNER Victor victor.stin...@haypocalc.com: -- nosy: +belopolsky ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13029 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13029] test_strptime fails on Windows 7 french
STINNER Victor victor.stin...@haypocalc.com added the comment: See also issue #10653. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13029 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10653] test_time test_strptime fails on windows
STINNER Victor victor.stin...@haypocalc.com added the comment: See also issue #13029. -- nosy: +haypo ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10653 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13029] test_strptime fails on Windows 7 french
Alexander Belopolsky alexander.belopol...@gmail.com added the comment: Isn't this a duplicate of #10653? In any case, this looks like a windows only issue, so I cannot move it further. Would be interested in resolution, though. Thanks for making me nosy. -- nosy: +ocean-city ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13029 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10254] unicodedata.normalize('NFC', s) regression
Victor Ruiz vic...@ninibe.com added the comment: Hi, I think I've come across what seems to be another flavor of this issue. The following string will cause a crash in some interpreters. text = u\u062d\u064e\u064a\u0651\u064b\u0627\u060c\u0648\u064e\u064a\u064e\u062d\u0650\u0642\u0651\u064e \u0627\u0644\u0652\u0642\u064e\u0648\u0652\u0644\u064f \u0648\u064e\u0644\u0651\u064e\u064a\u0652\u062a\u064f\u0643\u064f\u0645\u064e\u0627\u060c \u0648\u064e\u0625\u0650\u0646\u0652 \u0623\u064e\u0628\u064e\u064a\u0652\u062a\u064f\u0645\u064e\u0627 \u0623\u064e\u0646\u0652 \u062a\u064f\u0642\u0650\u0631\u0651\u064e\u0627 \u0628\u0650\u0627\u0644\u0625\u0650\u0633\u0652\u0644\u0627\u064e\u0645\u0650 \u0641\u064e\u0625\u0650\u0646\u0651\u064e \u0648\u064e\u062e\u064e\u064a\u0652\u0644\u0650\u064a \u062a\u064e\u062d\u064f\u0644\u0651\u064f \u0628\u0650\u0633\u064e\u0627\u062d\u064e\u062a\u0650\u0643\u064f\u0645\u064e\u0627\u060c \u0648\u064e\u062a\u064e\u0638\u0652\u0647\u064e\u0631\u064f \u0646\u064f\u0628\u064f\u0648\u0651\u064e\u062a\u0650\u064a \u0645\u064f\u0644\u0652\u0643\u0650\u0643\u064f\u0645\u064e\u0627.\u0648\u0643\u062a\u0628 \u0623\u0628\u064a\u0651\u064f \u0628\u0646 \u0643\u0639\u0628 \u0627\u0644\u0652\u0631\u064e\u0651\u062d\u0650\u064a\u0652\u0645\u060c \u0645\u0650\u0646 \u0645\u064f\u062d\u064e\u0645\u064e\u0651\u062f \u0631\u064e\u0633\u064f\u0648\u0652\u0644 \u0627\u0644\u0652\u0644\u064e\u0651\u0647 \u0625\u0650\u0644\u064e\u0649 \u0627\u0644\u0652\u0645\u064f\u0646\u0652\u0630\u0650\u0631 \u0628\u0652\u0646 \u0633\u064e\u0627\u0648\u0650\u064a \u0633\u064e\u0644\u064e\u0627\u0645 \u0639\u064e\u0644\u064e\u064a\u0652\u0643 \u0641\u064e\u0625\u0650\u0646\u0650\u0651\u064a \u0623\u064e\u062d\u0652\u0645\u064e\u062f \u0627\u0644\u0652\u0644\u064e\u0651\u0647 \u0625\u0650\u0644\u064e\u064a\u0652\u0643 \u0627\u0644\u064e\u0651\u0630\u0650\u064a\u0644\u064e\u0627 \u0625\u0650\u0644\u064e\u0647 \u063a\u064e\u064a\u0652\u0631\u064f\u0647 \u0648\u064e\u0623\u064e\u0634\u0652\u0647\u064e\u062f \u0623\u064e\u0646 \u0644\u064e\u0627 \u0625\u0650\u0644\u064e\u0647 \u0625\u0650\u0644\u064e\u0651\u0627 \u0627\u0644\u0652\u0644\u064e\u0651\u0647 There is a sample script attached. This issue does not seem to be related to the python version itself but rather to its compilation. Since the exact same version crashes in OSX but not Ubuntu linux for example. ERROR - Python 2.7.1 (r271:86832, Apr 9 2011, 17:12:59) [GCC 4.2.1 (Apple Inc. build 5664)] on darwin OK - Python 2.7.1+ (r271:86832, Apr 11 2011, 18:13:53) [GCC 4.5.2] on linux2 Default version 2.6.6 on Debian squeeze should crash too for example. This is a trace of the error in 2.7.1 OSX (this interpreter passes the test posted on msg124450): Process: Python [78170] Path: /opt/local/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python Identifier: Python Version: ??? (???) Code Type: X86-64 (Native) Parent Process: bash [77126] Date/Time: 2011-09-22 23:20:48.892 +0200 OS Version: Mac OS X 10.6.8 (10K549) Report Version: 6 Interval Since Last Report: 88509 sec Crashes Since Last Report: 135 Per-App Crashes Since Last Report: 134 Anonymous UUID: F5DD44CE-A8F4-474C-BA10-2B21B4C92C1E Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: 0x000d, 0x Crashed Thread: 0 Dispatch queue: com.apple.main-thread Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 org.python.python 0x000100086b33 _PyUnicode_Resize + 51 1 unicodedata.so 0x000100601bff nfc_nfkc + 335 2 unicodedata.so 0x000100601f2a unicodedata_normalize + 154 3 org.python.python 0x0001000bfccd PyEval_EvalFrameEx + 20797 4 org.python.python 0x0001000c1f16 PyEval_EvalCodeEx + 2118 5 org.python.python 0x0001000c2036 PyEval_EvalCode + 54 6 org.python.python 0x0001000e6a5e PyRun_FileExFlags + 174 7 org.python.python 0x0001000e6d19 PyRun_SimpleFileExFlags + 489 8 org.python.python 0x0001000fd6fc Py_Main + 2940 9 org.python.python 0x00010f14 0x1 + 3860 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0644062700200627 rbx: 0x000100373d9c rcx: 0x003c rdx: 0x000a rdi: 0x7fff5fbff078 rsi: 0x80169ba9 rbp: 0x7fff5fbfefa0 rsp: 0x7fff5fbfef80 r8: 0x004e r9: 0x000a r10: 0x000100373db8 r11: 0x000100373dac r12: 0x7fff5fbff078 r13: 0x80169ba9 r14: 0x80169ba9 r15: 0x00a1 rip: 0x000100086b33 rfl: 0x00010206 cr2: 0x00010066a2f4 Binary Images: 0x1 -0x10fff
[issue13030] Be more generic when identifying the Windows main dir in installation doc
New submission from Sandro Tosi sandro.t...@gmail.com: Given I have no knowledge of the windows system, I'm just proxying http://mail.python.org/pipermail/docs/2011-September/005793.html : Under: http://docs.python.org/install/index.html#inst-how-install-works It notes Windows prefix\Lib\site-packages C:\PythonXY\Lib\site-packages for default values on Windows. In the paragraph following the table is the text: prefix and exec-prefix stand for the directories that Python is installed to, and where it finds its libraries at run-time. They are always the same under Windows, and very often the same under Unix and Mac OS X. I don't know if it's hardcoded into Python distributions to use C, but it's not correct. The correct way to identify what most people think of as C is via the %SYSTEMROOT% environment variable, so the path described would be %SYSTEMROOT%\PythonXY\Lib\site-packages (This is still not the correct way to do things on Windows, but it at least shouldn't break on systems with a %SYSTEMROOT% other than C. I've seen configurations like that on systems which boot multiple versions of Windows.) -- assignee: docs@python components: Documentation messages: 144422 nosy: brian.curtin, docs@python, sandro.tosi, tim.golden priority: normal severity: normal stage: needs patch status: open title: Be more generic when identifying the Windows main dir in installation doc type: behavior versions: Python 2.7, Python 3.2, Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13030 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10254] unicodedata.normalize('NFC', s) regression
Changes by Alexander Belopolsky alexander.belopol...@gmail.com: -- status: closed - open ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10254 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12729] Python lib re cannot handle Unicode properly due to narrow/wide bug
Changes by Alexander Belopolsky alexander.belopol...@gmail.com: -- nosy: +belopolsky ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12729 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13026] Dis module - documentation of MAKE_FUNCTION
Terry J. Reedy tjre...@udel.edu added the comment: Agreed -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13026 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue6549] ttk.Style -- minor issues with element_names and configure
Changes by Terry J. Reedy tjre...@udel.edu: -- stage: - patch review versions: +Python 3.2, Python 3.3 -Python 3.1 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6549 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12902] help(modules) executes module code
Terry J. Reedy tjre...@udel.edu added the comment: As I said in msg143786, the second time only c-coded modules are listed. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12902 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12902] help(modules) executes module code
Ezio Melotti ezio.melo...@gmail.com added the comment: Right, I missed that. If we change the way the list is created this bug will be probably get fixed too. If we don't, we should open another issue. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12902 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10254] unicodedata.normalize('NFC', s) regression
Alexander Belopolsky alexander.belopol...@gmail.com added the comment: This new data does not crash Python 2.7.2, so I assume the issue has been fixed. Re-closing. -- status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10254 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12398] Sending binary data with a POST request in httplib can cause Unicode exceptions
Adam Cohen a...@seatgeek.com added the comment: I encountered this issue as well. params is simply a bytestring, with no encoding. Workaround/proper solution is to cast the string as a bytearray with bytearray(params). -- nosy: +Adam.Cohen ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12398 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10254] unicodedata.normalize('NFC', s) regression
STINNER Victor victor.stin...@haypocalc.com added the comment: This new data does not crash Python 2.7.2, so I assume the issue has been fixed. Yes, the bug was already fixed in branch 2.7 by the SVN commit r87541: changeset: 67185:54f1d5651555 branch: 2.7 parent: 67159:2d09af4c137c user:Alexander Belopolsky alexander.belopol...@gmail.com date:Tue Dec 28 15:47:56 2010 + files: Lib/test/test_normalization.py Lib/test/test_unicodedata.py Modules/unicodedata.c description: Merged revisions 87442 via svnmerge from svn+ssh://python...@svn.python.org/python/branches/py3k r87442 | alexander.belopolsky | 2010-12-22 21:27:37 -0500 (Wed, 22 Dec 2010) | 1 line Issue #10254: Fixed a crash and a regression introduced by the implementation of PRI 29. This fix is part of Python 2.7.2, but not of 2.7.2. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10254 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10254] unicodedata.normalize('NFC', s) regression
STINNER Victor victor.stin...@haypocalc.com added the comment: This fix is part of Python 2.7.2, but not of 2.7.2. ... but not of 2.7.1. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10254 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9319] imp.find_module('test/badsyntax_pep3120') causes segfault
Ezio Melotti ezio.melo...@gmail.com added the comment:
Can the workaround be removed from Lib/pydoc.py:2001 ?
I tried to remove it from 3.2 and help('modules spam') seems to work fine.
--
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[issue12931] xmlrpclib confuses unicode and string
Roundup Robot devn...@psf.upfronthosting.co.za added the comment: New changeset c02e790c4535 by Victor Stinner in branch '2.7': Issue #12931: xmlrpclib now encodes Unicode URI to ISO-8859-1, instead of http://hg.python.org/cpython/rev/c02e790c4535 New changeset 5ceab07bcd02 by Victor Stinner in branch '3.2': Issue #12931: Add a test with Unicode URI to test_xmlrpc http://hg.python.org/cpython/rev/5ceab07bcd02 New changeset 3b46f2e2d280 by Victor Stinner in branch 'default': Merge 3.2: Issue #12931: Add a test with Unicode URI to test_xmlrpc http://hg.python.org/cpython/rev/3b46f2e2d280 -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12931 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12931] xmlrpclib confuses unicode and string
Changes by STINNER Victor victor.stin...@haypocalc.com: -- resolution: - fixed status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12931 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12902] help(modules) executes module code
Ezio Melotti ezio.melo...@gmail.com added the comment:
A separate issue would be a feature request to not do that (assuming it
really does).
I tried to verify this (the fact that modules get imported with
help('modules')). Here are the results:
* Lib/foobar.py:
- help('modules'): foobar in the list, code is *not* executed;
- help('foobar'): code is executed;
* Lib/deleteme/__init__.py:
- help('modules'): deleteme in the list, code is executed;
- help('deleteme'): code is executed;
* Lib/deleteme/__init__.py and Lib/deleteme/foobar.py:
- help('modules'): deleteme in the list, only __init__ code is executed;
- help('deleteme.foobar'): foobar code is executed;
So it seems the only code that gets executed with help('modules') is the one in
packages' __init__s. It also seems that the code is executed only once, so
doing help('deleteme') after help('modules') doesn't execute the code again.
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[issue12931] xmlrpclib confuses unicode and string
Changes by Ezio Melotti ezio.melo...@gmail.com: -- stage: - committed/rejected ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12931 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12398] Sending binary data with a POST request in httplib can cause Unicode exceptions
STINNER Victor victor.stin...@haypocalc.com added the comment: Here is a patch for httplib encoding HTTP headers to ISO-8859-1, as done in Python 3 (see HTTPConnection.putheader() from http.client). urllib is not affected by this issue because it does already encode Unicode, but encode to ASCII instead of ISO-8859-1. Related commit in Python 3: changeset: 67720:b3cadf5cf742 user:Armin Ronacher armin.ronac...@active-4.com date:Sat Jan 22 13:44:22 2011 + files: Lib/http/client.py Lib/test/test_httpservers.py Misc/NEWS description: To match the behaviour of HTTP server, the HTTP client library now also encodes headers with iso-8859-1 (latin1) encoding. It was already doing that for incoming headers which makes this behaviour now consistent in both incoming and outgoing direction. -- keywords: +patch Added file: http://bugs.python.org/file23227/urllib2.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12398 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10141] SocketCan support
STINNER Victor victor.stin...@haypocalc.com added the comment: socketcan_v4.patch: - dummy question: why an address is a tuple with 1 string instead of just the string? Does AF_UNIX also uses a tuple of 1 string? - the example should also use struct.pack() to create the frame, I don't like hardcoded BLOB - in test_socket: _have_socket_can() interprets permission denied as CAN is not supported, it would be nice to provide a better skip message. Create maybe a decorator based? - _have_socket_can(): you may move s.close() outside the try block (add maybe a else: block?) because you may hide a real bug in .close() - data += b'\0' * (8 - can_dlc): I prefer data = data.ljust(8, '\x00') - you might add frame encoder/decoder in your example - if (!strcmp(PyBytes_AS_STRING(interfaceName), )) hum. PyBytes_GET_SIZE(intername)==0 should be enough - you truncate the interface name, it can be surprising, I would prefer an error (e.g. interface name too long: 20 characters, the maximum is 10 characters ?) - (oh no! don't include horrible configure diff in patches for the bug tracker :-p) In which Linux version was CAN introduced? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10141 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12943] tokenize: add python -m tokenize support back
Meador Inge mead...@gmail.com added the comment: I don't think the help option needs to be documented, it will document itself. Normally I would document it anyway, but in this case there is only the one option. So, I dropped it. An additional suggestion is to catch errors on tokenizing and exiting with a non-zero exit status in these cases. I like that idea. Sample output: $ python -m tokenize foo.py foo.py: error: unknown encoding: meador $ python -m tokenize foo.py foo.py:7:2: error: unindent does not match any outer indentation level $ ./python -m tokenize bogus.py error: [Errno 2] No such file or directory: 'bogus.py' $ python -m tokenize foo.py $ echo '[1,' | ./python -m tokenize 1,0-1,1:OP '[' 1,1-1,2:NUMBER '1' 1,2-1,3:OP ',' 1,3-1,4:NL '\n' stdin:2:0: error: EOF in multi-line statement Attached is the latest patch implementing these suggestions. -- Added file: http://bugs.python.org/file23228/issue12943-5.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12943 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13031] [PATCH] small speed-up for tarfile.py when unzipping tarballs
New submission from Justin Peel pee...@gmail.com: Attached small diff speeds up extracting a gzipped tarball on my machine using python 3.2 by 3-5%. It will probably be a larger percentage on machines that have faster hard drives (mine is 5400rpm). Basically, the changes speed up calculating the checksums by only doing one slice rather than four and call struct.unpack twice rather than four times. We are able to use less unpack calls because 'x' means to skip a byte. -- components: Library (Lib) files: cpython_tarfile.diff keywords: patch messages: 144436 nosy: jpeel priority: normal severity: normal status: open title: [PATCH] small speed-up for tarfile.py when unzipping tarballs versions: Python 2.7, Python 3.2 Added file: http://bugs.python.org/file23229/cpython_tarfile.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13031 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13031] [PATCH] small speed-up for tarfile.py when unzipping tarballs
Changes by Justin Peel pee...@gmail.com: -- type: - performance ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13031 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
