date:20120412

On Thu, Apr 12, 2012 at 4:02 PM, Karl Knechtel zahl...@gmail.com wrote:
 Aside: when I double-click a .py file, what determines which Python will run
 it? Is it a matter of which appears first in the PATH, or do I have to set
 something else in the registry? Will a shebang line override the default on
 Windows? If so, how do I write a shebang line for a Windows path - just
 #!C:/Windows/Python32?

Apologies - I can't answer your main question, and am just picking up the aside.

The file-type association (which is really a file-extension
association) determines the path to the executable. If that's
specified without a full path, then it'll be the first one in PATH,
but usually the association is given as an absolute filespec. I don't
have a Vista handy, but in XP, bring up any folder, Options|Folder
Options, File Types, and scroll down to PY. (For some obscure reason,
on this particular computer of mine the association is with a Python
that was installed with GNU Lilypond. Weird!) You may need to use the
Advanced button to see the full path.

As to writing a shebang, there's no way to do that directly. But in
theory you could associate .py files with a little script that reads
the first line and figures out which interpreter to invoke it in. For
extra coolness points, write that script in portable Python that can
be run on any of the interpreters you have installed - then you don't
have to care! :)

Chris Angelico
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Is it possible develop applications in python for android and which IDE could you recommend me (Eclipse, ...)???

2012-04-12 Thread sisifus

Hello all,

I would like to know if it's possible develop android applications with
python, making the apk package, etc. I don't want program from an android
device only want to make programs for android from my PC.

If it's possible which IDE could you recommend me?

Thanks for your help

Regards
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Sockets accept() in child processes

2012-04-12 Thread Thibaut DIRLIK

Hi,

I'm writing a multiprocess server with Python 3.2 and the multiprocessing
module. Here is my current implementation :

- Main process: select() on a list of server sockets (different ips of the
host, ssl or not, etc)
- Children process : When they get a signal (in fact, a message in a pipe),
they will accept() the server socket

The problem is that after select() returns, I can accept() in the main
process, but in a children process I got a EAGAIN error.
The sockets are non-blocking. It seems that accept() can only be called in
the same process that the one which selected().

This is a problem because I wanted to decide which process I should ask
to take the connection
to do some basic load-balacing based on current number of connected client
in each process.

Could someone help me or propose other implementations ?

Thank you,
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is this foolish?

2012-04-12 Thread Cameron Simpson

I've found myself using a Python gotcha as a feature.

I've got a budding mail filter program which keeps rule state in a
little class instance. Slightly paraphrased:

class RuleState(object):
def __init__(self, M, maildb_path, maildirs={}):
[...]
self.maildirs = maildirs

The maildirs property is a cache of Maildir objects mapped by their
pathname to avoid opening Maildirs every time they're mentioned. I
create a new RuleState every time I file a message, and of course I want
to share the cache between instances.

Normally we look on the Python default parameter value as a gotcha which
causes the unwary to reuse a single object across the board, causing
unwanted persistence of state.

But here I actually think this is a sane way to make an anonymous single
shared state object for the maildirs cache, absent the caller's intent
to use their own.

I can think of a few potential downsides, but on the whole this is going
to do exactly what I want in this case.

Would experienced users please mock me?
-- 
Cameron Simpson c...@zip.com.au DoD#743
http://www.cskk.ezoshosting.com/cs/

Real Daleks don't climb stairs Real Daleks level the building.
- Adrian Tritschler, ajft@ajft_sun.cs.adfa.oz.au
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Re: is this foolish?

On Thu, Apr 12, 2012 at 7:35 PM, Cameron Simpson c...@zip.com.au wrote:
 I've found myself using a Python gotcha as a feature.

 I've got a budding mail filter program which keeps rule state in a
 little class instance. Slightly paraphrased:

    class RuleState(object):
        def __init__(self, M, maildb_path, maildirs={}):
            [...]
            self.maildirs = maildirs

 Would experienced users please mock me?

Well, no mocking; the same technique on a non-method function is a
pretty normal way of maintaining state. But wouldn't it be simpler to
use a class variable?

class RuleState(object):
maildirs = {}
def __init__(self, M, maildb_path):

Then just use self.maildirs everywhere, never assign to it.

ChrisA
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Re: is this foolish?

2012-04-12 Thread Cameron Simpson

On 12Apr2012 19:43, Chris Angelico ros...@gmail.com wrote:
| On Thu, Apr 12, 2012 at 7:35 PM, Cameron Simpson c...@zip.com.au wrote:
|  I've found myself using a Python gotcha as a feature.
|  I've got a budding mail filter program which keeps rule state in a
|  little class instance. Slightly paraphrased:
| 
|     class RuleState(object):
|         def __init__(self, M, maildb_path, maildirs={}):
|             [...]
|             self.maildirs = maildirs
| 
|  Would experienced users please mock me?
| 
| Well, no mocking; the same technique on a non-method function is a
| pretty normal way of maintaining state.

I hadn't realised it was a common approach.

| But wouldn't it be simpler to use a class variable?

Yes. Yes it would.

| class RuleState(object):
| maildirs = {}
| def __init__(self, M, maildb_path):
| Then just use self.maildirs everywhere, never assign to it.

Thanks. It makes the shared state far more obvious, too.

Cheers,
-- 
Cameron Simpson c...@zip.com.au DoD#743
http://www.cskk.ezoshosting.com/cs/

Life IS pain, highness...  anyone who tries to tell you different is
trying to sell you something.   - Wesley, The_Princess_Bride
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Error in MD5 checksums of the 2.7.3 release page.

2012-04-12 Thread Jérémy Bethmont

Hello,

There is an error in the MD5 checksums section of the following page:
    http://python.org/download/releases/2.7.3/

Python-3.1.5.tgz, Python-3.1.5.tar.bz2 and Python-3.1.5.tar.xz
are listed instead of:
Python-2.7.3.tgz, Python-2.7.3.tar.bz2 and Python-2.7.3.tar.xz

Best,

--
Jérémy Bethmont
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Re: is this foolish?

2012-04-12 Thread Tim Golden

On 12/04/2012 10:35, Cameron Simpson wrote:
 I've found myself using a Python gotcha as a feature.

Have a look at Peter Inglesby's lightning talk from a
recent London Python Dojo:

  http://inglesp.github.com/2012/03/24/mutable-default-arguments.html

TJG
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Re: is this foolish?

2012-04-12 Thread Karl Knechtel

On Thu, Apr 12, 2012 at 7:15 AM, Tim Golden m...@timgolden.me.uk wrote:

 On 12/04/2012 10:35, Cameron Simpson wrote:
  I've found myself using a Python gotcha as a feature.

 Have a look at Peter Inglesby's lightning talk from a
 recent London Python Dojo:

  http://inglesp.github.com/2012/03/24/mutable-default-arguments.html


That's interesting, but you can get the same effect with a function
attribute, if you really don't want to write a class... that way also
protects you against accidentally passing something in to override the
default. (Incidentally: I feel that the lambda x = x: ... idiom to avoid
multiple closures sharing state is an ugly hack, for the same reason.)


-- 
~Zahlman {:
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Re: Problem connecting to SMTP/IMAP server using SSL

2012-04-12 Thread Christian Heimes

Am 12.04.2012 08:56, schrieb Julien Phalip:
 Hi Michael,
 
 Thanks again for your reply. I've tried using SMTP with TLS. And again
 it works with the VPN turned on but it still won't work with the VPN
 turned off. For some reason I don't understand, it simply won't
 instantiate the SMTP/SMTP_SSL/IMAP4/IMAP4_SSL objects at all and will
 hang forever if the VPN is turned off.

Are you trying to connect to an Exchange server? Several Exchange mobile
clients aren't using IMAP and SMTP but EAS over HTTPS. I have the same
setup at work. The SMTP port is blocked unless I'm at the office or
using VPN.

In your case the connection hangs forever because your office's firewall
drops the network packages instead of sending a reject package. The
client keeps on trying since you haven't configured a timeout.

Christian

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Re: is this foolish?

2012-04-12 Thread Jean-Michel Pichavant


Cameron Simpson wrote:

I've found myself using a Python gotcha as a feature.

I've got a budding mail filter program which keeps rule state in a
little class instance. Slightly paraphrased:

class RuleState(object):
def __init__(self, M, maildb_path, maildirs={}):
[...]
self.maildirs = maildirs

The maildirs property is a cache of Maildir objects mapped by their
pathname to avoid opening Maildirs every time they're mentioned. I
create a new RuleState every time I file a message, and of course I want
to share the cache between instances.

Normally we look on the Python default parameter value as a gotcha which
causes the unwary to reuse a single object across the board, causing
unwanted persistence of state.

But here I actually think this is a sane way to make an anonymous single
shared state object for the maildirs cache, absent the caller's intent
to use their own.

I can think of a few potential downsides, but on the whole this is going
to do exactly what I want in this case.

Would experienced users please mock me?
  
Instance attributes are not meant to be shared among all instances. 
Assigning a persistant object over instances to an instance attribute is 
perverting your design.
Remember that experienced programmers will automaticcaly trigger a 
warning in their mind when reading your mutable maildirs. They 'll lose 
time to realize that it was intended. Since there is much more standard 
ways to do this (class attribute for instance), you should not use that 
form.


Cleverness is the step mother of obfuscation.

JM
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Re: is this foolish?

2012-04-12 Thread Andrea Crotti


On 04/12/2012 10:35 AM, Cameron Simpson wrote:

I've found myself using a Python gotcha as a feature.

I've got a budding mail filter program which keeps rule state in a
little class instance. Slightly paraphrased:

 class RuleState(object):
 def __init__(self, M, maildb_path, maildirs={}):
 [...]
 self.maildirs = maildirs

The maildirs property is a cache of Maildir objects mapped by their
pathname to avoid opening Maildirs every time they're mentioned. I
create a new RuleState every time I file a message, and of course I want
to share the cache between instances.

Normally we look on the Python default parameter value as a gotcha which
causes the unwary to reuse a single object across the board, causing
unwanted persistence of state.

But here I actually think this is a sane way to make an anonymous single
shared state object for the maildirs cache, absent the caller's intent
to use their own.

I can think of a few potential downsides, but on the whole this is going
to do exactly what I want in this case.

Would experienced users please mock me?


You could probably just make this caching more explicit using a decorator.
The good thing about that is that you could even change the behaviour of 
your

caching without touching the code that uses it for example.
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Coping with risk of decision - modeling of scenarios of parameters of the model in python

2012-04-12 Thread John Oksz


Hello,

I work with energy planning on municipal level.
I have an energy supply deterministic model for municipal customer.

Now I want to coping with uncertainty and risk of decision choosing
one energy supply option for implementing in real.
Some parameters of my deterministic model (energy prices and energy
demands) are uncertainty in future.

I want to coping with uncertainty by using: (1) scenario analysis, (2)
stochastic simulation, and (3) on the end of my research stochastic
optimization.
I want to calculate VaR and CVaR of any modeling decision.

For this parameters (which are uncertainty) I have  historical data
(last 15 years) and I want use this data for forecasting/modeling
scenarios for energy carriers prices (gas, electricity, LPG, coal,
etc.) in future 15 year.

I am looking for methodology of creating scenarios of parameters of
the model (ex-post… ex-ante, ???) for this decision problem.

Can you suggest any paper/book/example about:
- scenario analysis in pyhon
- stochastic simulation in pyhon
- coping with uncertenises and  risk in python (VaR, CVaR)?

Thanks in advance for any help.
John

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Re: [Windows] drag-and-drop onto .py file in modern versions?

2012-04-12 Thread Mark Lawrence


On 12/04/2012 08:00, Chris Angelico wrote:

On Thu, Apr 12, 2012 at 4:02 PM, Karl Knechtelzahl...@gmail.com  wrote:

Aside: when I double-click a .py file, what determines which Python will run
it? Is it a matter of which appears first in the PATH, or do I have to set
something else in the registry? Will a shebang line override the default on
Windows? If so, how do I write a shebang line for a Windows path - just
#!C:/Windows/Python32?


Apologies - I can't answer your main question, and am just picking up the aside.

The file-type association (which is really a file-extension
association) determines the path to the executable. If that's
specified without a full path, then it'll be the first one in PATH,
but usually the association is given as an absolute filespec. I don't
have a Vista handy, but in XP, bring up any folder, Options|Folder
Options, File Types, and scroll down to PY. (For some obscure reason,
on this particular computer of mine the association is with a Python
that was installed with GNU Lilypond. Weird!) You may need to use the
Advanced button to see the full path.

As to writing a shebang, there's no way to do that directly. But in
theory you could associate .py files with a little script that reads
the first line and figures out which interpreter to invoke it in. For
extra coolness points, write that script in portable Python that can
be run on any of the interpreters you have installed - then you don't
have to care! :)

Chris Angelico


For the record please see http://www.python.org/dev/peps/pep-0397/ 
Python launcher for Windows which discusses shebang lines.


--
Cheers.

Mark Lawrence.

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Re: is this foolish?

2012-04-12 Thread gene heskett

On Thursday, April 12, 2012 10:40:47 AM Tim Golden did opine:

 On 12/04/2012 10:35, Cameron Simpson wrote:
  I've found myself using a Python gotcha as a feature.
 
Tim:  your setup of using the CC: line for every thing with a blank To: 
line is landing your posts in my spam folder.  Do you have a specific 
reason for not using a To: line?

I am not inclined to change my filer rules because that particular rule 
catches a lot of the incoming spam.

 Have a look at Peter Inglesby's lightning talk from a
 recent London Python Dojo:
 
   http://inglesp.github.com/2012/03/24/mutable-default-arguments.html
 
 TJG


Cheers, Gene
-- 
There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order.
-Ed Howdershelt (Author)
My web page: http://coyoteden.dyndns-free.com:85/gene
He who invents adages for others to peruse
takes along rowboat when going on cruise.
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Re: functions which take functions


On 4/11/2012 16:01, Antti J Ylikoski wrote:

On 9.4.2012 21:57, Kiuhnm wrote:

Do you have some real or realistic (but easy and self-contained)
examples when you had to define a (multi-statement) function and pass it
to another function?
Thank you.

Kiuhnm


A function to numerically integrate another function comes as follows:

[...]

Thank you.

Kiuhnm
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Re: functions which take functions


On 4/12/2012 8:07, Tim Roberts wrote:

Kiuhnmkiuhnm03.4t.yahoo.it  wrote:


That won't do. A good example is when you pass a function to re.sub, for
instance.


This is an odd request.


All shall be revealed :)



I often pass functions to functions in order to simulate a C switch
statement, such as in a language translator:

   commands = {
 'add': doAdd,
 'subtract' : doSubtract,
 'multiply' : doMultiply,
 'divide' : doDivide
   }

   nextCommand = parseCommandLine( line )
   invokeCommand( commands[NextCommand] )


I like that very much. Thank you.

Kiuhnm
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Zipping a dictionary whose values are lists

2012-04-12 Thread tkpmep

I using Python 3.2 and have a dictionary
 d = {0:[1,2], 1:[1,2,3], 2:[1,2,3,4]}

whose values are lists I would like to zip into a list of tuples. If I 
explicitly write:
 list(zip([1,2], [1,2,3], [1,2,3,4])
[(1, 1, 1), (2, 2, 2)]

I get exactly what I want. On the other hand, I have tried

list(zip(d))
[(0,), (1,), (2,)]

 list(zip(d.values()))
[([1, 2],), ([1, 2, 3],), ([1, 2, 3, 4],)]

 list(zip(d[i] for i in d))
[([1, 2],), ([1, 2, 3],), ([1, 2, 3, 4],)]

 list(zip(*d))
Traceback (most recent call last):
  File pyshell#48, line 1, in module
list(zip(*d))
TypeError: zip argument #1 must support iteration

and nothing quite works. What am I doing wrong?

Sincerely

Thomas Philips
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Re: Zipping a dictionary whose values are lists

2012-04-12 Thread Pavel Anossov

zip(*d.values())

On 12 April 2012 20:28,  tkp...@gmail.com wrote:
 I using Python 3.2 and have a dictionary
 d = {0:[1,2], 1:[1,2,3], 2:[1,2,3,4]}

 whose values are lists I would like to zip into a list of tuples. If I 
 explicitly write:
 list(zip([1,2], [1,2,3], [1,2,3,4])
 [(1, 1, 1), (2, 2, 2)]

 I get exactly what I want. On the other hand, I have tried

list(zip(d))
 [(0,), (1,), (2,)]

 list(zip(d.values()))
 [([1, 2],), ([1, 2, 3],), ([1, 2, 3, 4],)]

 list(zip(d[i] for i in d))
 [([1, 2],), ([1, 2, 3],), ([1, 2, 3, 4],)]

 list(zip(*d))
 Traceback (most recent call last):
  File pyshell#48, line 1, in module
    list(zip(*d))
 TypeError: zip argument #1 must support iteration

 and nothing quite works. What am I doing wrong?

 Sincerely

 Thomas Philips
 --
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-- 
С уважением, Аносов Павел
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Re: Zipping a dictionary whose values are lists


On 4/12/2012 18:28, tkp...@gmail.com wrote:

I using Python 3.2 and have a dictionary

d = {0:[1,2], 1:[1,2,3], 2:[1,2,3,4]}


whose values are lists I would like to zip into a list of tuples. If I 
explicitly write:

list(zip([1,2], [1,2,3], [1,2,3,4])

[(1, 1, 1), (2, 2, 2)]

I get exactly what I want. On the other hand, I have tried


list(zip(d))

[(0,), (1,), (2,)]


list(zip(d.values()))

[([1, 2],), ([1, 2, 3],), ([1, 2, 3, 4],)]


Almost. Since d.values() = [[1,2], [1,2,3], [1,2,3,4]], you need to use
list(zip(*d.values()))
which is equivalent to
list(zip([1,2], [1,2,3], [1,2,3,4]))

Kiuhnm
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Re: Zipping a dictionary whose values are lists

2012-04-12 Thread Peter Otten

tkp...@gmail.com wrote:

 I using Python 3.2 and have a dictionary
 d = {0:[1,2], 1:[1,2,3], 2:[1,2,3,4]}
 
 whose values are lists I would like to zip into a list of tuples. If I
 explicitly write:
 list(zip([1,2], [1,2,3], [1,2,3,4])
 [(1, 1, 1), (2, 2, 2)]
 
 I get exactly what I want. On the other hand, I have tried
 
list(zip(d))
 [(0,), (1,), (2,)]
 
 list(zip(d.values()))
 [([1, 2],), ([1, 2, 3],), ([1, 2, 3, 4],)]
 
 list(zip(d[i] for i in d))
 [([1, 2],), ([1, 2, 3],), ([1, 2, 3, 4],)]
 
 list(zip(*d))
 Traceback (most recent call last):
   File pyshell#48, line 1, in module
 list(zip(*d))
 TypeError: zip argument #1 must support iteration
 
 and nothing quite works. What am I doing wrong?

You have all the building blocks ;)

 d = {0:[1,2], 1:[1,2,3], 2:[1,2,3,4]}
 list(zip(*d.values()))
[(1, 1, 1), (2, 2, 2)]

The order of the values is undefined, so you may want to sort the lists by 
key first:

 list(zip(*[v for k, v in sorted(d.items())]))
[(1, 1, 1), (2, 2, 2)]

Well, I guess it doesn't really matter for that example...

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Re: Zipping a dictionary whose values are lists

2012-04-12 Thread Dan Sommers

On Thu, 12 Apr 2012 09:28:03 -0700 (PDT)
tkp...@gmail.com wrote:

 I using Python 3.2 and have a dictionary
  d = {0:[1,2], 1:[1,2,3], 2:[1,2,3,4]}
 
 whose values are lists I would like to zip into a list of tuples. If
 I explicitly write:
  list(zip([1,2], [1,2,3], [1,2,3,4])
 [(1, 1, 1), (2, 2, 2)]
 
 I get exactly what I want. On the other hand, I have tried
 
 list(zip(d))
 [(0,), (1,), (2,)]
 
  list(zip(d.values()))
 [([1, 2],), ([1, 2, 3],), ([1, 2, 3, 4],)]
 
  list(zip(d[i] for i in d))
 [([1, 2],), ([1, 2, 3],), ([1, 2, 3, 4],)]
 
  list(zip(*d))
 Traceback (most recent call last):
   File pyshell#48, line 1, in module
 list(zip(*d))
 TypeError: zip argument #1 must support iteration
 
 and nothing quite works. What am I doing wrong?

Try this:

 list(zip(*d.values()))

d.values() is a list, but zip wants the individual values as separate
arguments.

HTH,
Dan
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Re: Is it possible develop applications in python for android and which IDE could you recommend me (Eclipse, ...)???

http://code.google.com/p/android-scripting/

However, I've not used it, and I'm told it requires a stub for each new
android method exposed to python.  I find it a little regrettable that they
didn't start frp, jython or pypy for jvm instead of cpython, to avoid all
the stubbing.

On Thu, Apr 12, 2012 at 1:21 AM, sisifus pyt...@borja.fagorederlan.eswrote:

 Hello all,

 I would like to know if it's possible develop android applications with
 python, making the apk package, etc. I don't want program from an android
 device only want to make programs for android from my PC.

 If it's possible which IDE could you recommend me?

 Thanks for your help

 Regards

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Re: Sockets accept() in child processes

I wonder if this'll do what you need:
https://trac.calendarserver.org/browser/CalendarServer/trunk/twext/python/sendfd.py

On Thu, Apr 12, 2012 at 2:31 AM, Thibaut DIRLIK merwin@gmail.comwrote:

 Hi,

 I'm writing a multiprocess server with Python 3.2 and the multiprocessing
 module. Here is my current implementation :

 - Main process: select() on a list of server sockets (different ips of the
 host, ssl or not, etc)
 - Children process : When they get a signal (in fact, a message in a
 pipe), they will accept() the server socket

 The problem is that after select() returns, I can accept() in the main
 process, but in a children process I got a EAGAIN error.
 The sockets are non-blocking. It seems that accept() can only be called in
 the same process that the one which selected().

 This is a problem because I wanted to decide which process I should ask
 to take the connection
 to do some basic load-balacing based on current number of connected client
 in each process.

 Could someone help me or propose other implementations ?

 Thank you,

 --
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Re: Problem connecting to SMTP/IMAP server using SSL

Are you quite sure that your iPhone isn't using some sort of VPN?

On my Android phone, I need a VPN client to access my work mail, but I
install it once and forget about it; it doesn't require me to enter my
password more than once.

On Fri, Mar 30, 2012 at 10:39 PM, Julien jpha...@gmail.com wrote:

 Hi,

 I'm able to connect to an Exchange server via SMTP and IMAP from my
 iPhone using SSL and without using a VPN. So I would expect to be able
 to do the same from my computer using Python.

 However, the following hangs and times out on my computer when I'm not
 connected to the VPN:

  import imaplib
  imap = imaplib.IMAP4_SSL(my.server.address)

 If I am connected to the VPN, then it works fine.

 Do you know why it won't work with SSL and without the VPN? Am I
 missing something?

 Thanks a lot,

 Julien
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Re: functions which take functions

2012-04-12 Thread Jan Kuiken


On 4/9/12 20:57 , Kiuhnm wrote:


Do you have some real or realistic (but easy and self-contained)
examples when you had to define a (multi-statement) function and pass it
to another function?


I don't use it daily but the first argument of list.sort, i.e. the
compare function springs to mind.

Jan Kuiken


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Re: python module development workflow

2012-04-12 Thread John Nagle


On 4/11/2012 1:04 PM, Miki Tebeka wrote:

Could any expert suggest an authoritative and complete guide for
developing python modules? Thanks!

I'd start with http://docs.python.org/distutils/index.html


Make sure that

python setup.py build
python setup.py install

works.

Don't use the rotten egg distribution system.
(http://packages.python.org/distribute/easy_install.html)

John Nagle

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Re: Problem connecting to SMTP/IMAP server using SSL

Maybe it's a matter of two different protocols, one requiring a VPN, one
not.

You could perhaps try a sniffer to check that out.  Where to place the
sniffer could be complicated though.

On Fri, Mar 30, 2012 at 10:39 PM, Julien jpha...@gmail.com wrote:

 Hi,

 I'm able to connect to an Exchange server via SMTP and IMAP from my
 iPhone using SSL and without using a VPN. So I would expect to be able
 to do the same from my computer using Python.

 However, the following hangs and times out on my computer when I'm not
 connected to the VPN:

  import imaplib
  imap = imaplib.IMAP4_SSL(my.server.address)

 If I am connected to the VPN, then it works fine.

 Do you know why it won't work with SSL and without the VPN? Am I
 missing something?

 Thanks a lot,

 Julien
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Deep merge two dicts?

2012-04-12 Thread Roy Smith

Is there a simple way to deep merge two dicts?  I'm looking for Perl's
Hash::Merge (http://search.cpan.org/~dmuey/Hash-Merge-0.12/Merge.pm)
in Python.
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Re: Sockets accept() in child processes

2012-04-12 Thread Merwin


Le 12/04/2012 19:10, Dan Stromberg a écrit :


I wonder if this'll do what you need:
https://trac.calendarserver.org/browser/CalendarServer/trunk/twext/python/sendfd.py


The problem is that this is Linux-only solution, and I would like to 
keep a multi-platform compatibility.


There are other ways to do this : use a Lock and do the select() 
directly in the children processes,
but I can't control which process will get the lock, and it's totally 
possible that only 2 processes on 8

will accept connections alternatively.



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Re: Deep merge two dicts?

2012-04-12 Thread John Nagle


On 4/12/2012 10:41 AM, Roy Smith wrote:

Is there a simple way to deep merge two dicts?  I'm looking for Perl's
Hash::Merge (http://search.cpan.org/~dmuey/Hash-Merge-0.12/Merge.pm)
in Python.


def dmerge(a, b) :
   for k in a :
v = a[k]
if isinstance(v, dict) and k in b:
dmerge(v, b[k])
   a.update(b)



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multiprocessing and Array problems

2012-04-12 Thread Al Niessner


I am not subscribed to these lists but I do check them occasionally and
will check them more frequently looking for a response.

I am getting a pickling error that I do not understand. It seems the
shared arrays that I create cannot be pickled. Makes the
multiprocessing.Array fairly useless if it cannot be pickled. Hence, I
am guessing that I am doing something wrong and would like some help
spotting it.

This is basically a cut and paste from the examples in the
documentation:

import ctypes
import multiprocessing

def subproc (a, i):
print (From subprocess  + str(i))
print (a[:])
return

if __name__ == __main__:
nproc = 3
print (\nBuilding the array for the second computation.)
b = multiprocessing.Array (ctypes.c_double, nproc*nproc, lock=False)

print (\nSending the task across to see what happens.)
pool = multiprocessing.Pool(nproc)
for i in range(nproc): pool.apply_async (subproc, kwds={'a':b,
'i':i})
pool.close()
pool.join()
pass

Whether I run it on 2.6, 2.7, or 3.2 I get the same error.

Exception in thread Thread-1:
Traceback (most recent call last):
  File /usr/lib/python2.6/threading.py, line 532, in __bootstrap_inner
self.run()
  File /usr/lib/python2.6/threading.py, line 484, in run
self.__target(*self.__args, **self.__kwargs)
  File /usr/lib/python2.6/multiprocessing/pool.py, line 225, in
_handle_tasks
put(task)
PicklingError: Can't pickle class
'multiprocessing.sharedctypes.c_double_Array_9': attribute lookup
multiprocessing.sharedctypes.c_double_Array_9 failed


Anyone want to take a stab as to why this error message is being
generated? Again I have tried python 2.6.7, 2.7.2+, and 3.2.2.

Thanks for any and all help in advance.

-- 
Al Niessner

I have never found the companion that was so companionable as solitude.
- From Walden by Henry David Thoreau

The universe is indifferent, and life is brutal; however, it is man's
choice of behavior that makes them malevolent rather than benevolent.

Some will fall in love with life and drink it from a fountain
That is pouring like an avalanche coming down the mountain.
- From the song Pepper by the Butthole Surfers


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Re: multiprocessing and Array problems

2012-04-12 Thread Al Niessner


Here is an update.

def subproc (i):
print (From subprocess  + str(i))
print (b[:])
return

if __name__ == __main__:
nproc = 3
print (\nBuilding the array for the second computation.)
b = multiprocessing.Array (ctypes.c_double, nproc*nproc, lock=False)

print (\nSending the task across to see what happens.)
pool = multiprocessing.Pool(nproc)
for i in range(nproc): pool.apply_async (subproc, kwds={'i':i})
pool.close()
pool.join()
pass

Does work. It is not what I need though. I need to be able to pass b as
an argument. The reason is that I create some of these in a loop and
they are not in a global space nor are they know prior to creating the
pool.

On Thu, 2012-04-12 at 11:15 -0700, Al Niessner wrote:
 I am not subscribed to these lists but I do check them occasionally and
 will check them more frequently looking for a response.
 
 I am getting a pickling error that I do not understand. It seems the
 shared arrays that I create cannot be pickled. Makes the
 multiprocessing.Array fairly useless if it cannot be pickled. Hence, I
 am guessing that I am doing something wrong and would like some help
 spotting it.
 
 This is basically a cut and paste from the examples in the
 documentation:
 
 import ctypes
 import multiprocessing
 
 def subproc (a, i):
 print (From subprocess  + str(i))
 print (a[:])
 return
 
 if __name__ == __main__:
 nproc = 3
 print (\nBuilding the array for the second computation.)
 b = multiprocessing.Array (ctypes.c_double, nproc*nproc, lock=False)
 
 print (\nSending the task across to see what happens.)
 pool = multiprocessing.Pool(nproc)
 for i in range(nproc): pool.apply_async (subproc, kwds={'a':b,
 'i':i})
 pool.close()
 pool.join()
 pass
 
 Whether I run it on 2.6, 2.7, or 3.2 I get the same error.
 
 Exception in thread Thread-1:
 Traceback (most recent call last):
   File /usr/lib/python2.6/threading.py, line 532, in __bootstrap_inner
 self.run()
   File /usr/lib/python2.6/threading.py, line 484, in run
 self.__target(*self.__args, **self.__kwargs)
   File /usr/lib/python2.6/multiprocessing/pool.py, line 225, in
 _handle_tasks
 put(task)
 PicklingError: Can't pickle class
 'multiprocessing.sharedctypes.c_double_Array_9': attribute lookup
 multiprocessing.sharedctypes.c_double_Array_9 failed
 
 
 Anyone want to take a stab as to why this error message is being
 generated? Again I have tried python 2.6.7, 2.7.2+, and 3.2.2.
 
 Thanks for any and all help in advance.
 

-- 
Al Niessner

I have never found the companion that was so companionable as solitude.
- From Walden by Henry David Thoreau

The universe is indifferent, and life is brutal; however, it is man's
choice of behavior that makes them malevolent rather than benevolent.

Some will fall in love with life and drink it from a fountain
That is pouring like an avalanche coming down the mountain.
- From the song Pepper by the Butthole Surfers


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Re: Deep merge two dicts?

2012-04-12 Thread Ian Kelly

On Thu, Apr 12, 2012 at 11:59 AM, John Nagle na...@animats.com wrote:
 On 4/12/2012 10:41 AM, Roy Smith wrote:

 Is there a simple way to deep merge two dicts?  I'm looking for Perl's
 Hash::Merge (http://search.cpan.org/~dmuey/Hash-Merge-0.12/Merge.pm)
 in Python.


 def dmerge(a, b) :
   for k in a :
        v = a[k]
        if isinstance(v, dict) and k in b:
            dmerge(v, b[k])
   a.update(b)

That doesn't work.  After b[k] is recursively merged into a[k], the
call a.update(b) copies b[k] into a[k], discarding the merged dict.
Try this:

def dmerge(a, b):
for k, v in b.items():
if isinstance(v, dict) and k in a:
dmerge(a[k], v)
else:
a[k] = v

Hash::Merge also does a lot more than this, but I'm not sure exactly
which functionality the OP is looking for.
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Re: Error in MD5 checksums of the 2.7.3 release page.

2012-04-12 Thread Terry Reedy


On 4/12/2012 6:11 AM, Jérémy Bethmont wrote:


There is an error in the MD5 checksums section of the following page:
 http://python.org/download/releases/2.7.3/

Python-3.1.5.tgz, Python-3.1.5.tar.bz2 and Python-3.1.5.tar.xz
are listed instead of:
Python-2.7.3.tgz, Python-2.7.3.tar.bz2 and Python-2.7.3.tar.xz


verified and forwarded to pydev list for correction.

--
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Re: multiprocessing and Array problems

2012-04-12 Thread MRAB


On 12/04/2012 19:30, Al Niessner wrote:


Here is an update.

def subproc (i):
 print (From subprocess  + str(i))
 print (b[:])
 return

if __name__ == __main__:
 nproc = 3
 print (\nBuilding the array for the second computation.)
 b = multiprocessing.Array (ctypes.c_double, nproc*nproc, lock=False)

 print (\nSending the task across to see what happens.)
 pool = multiprocessing.Pool(nproc)
 for i in range(nproc): pool.apply_async (subproc, kwds={'i':i})
 pool.close()
 pool.join()
 pass

Does work. It is not what I need though. I need to be able to pass b as
an argument. The reason is that I create some of these in a loop and
they are not in a global space nor are they know prior to creating the
pool.


Doing this works:

processes = []
for i in range(nproc):
processes.append(multiprocessing.Process(target=subproc, 
kwargs={'a':b, 'i':i}))

for p in processes:
p.start()
for p in processes:
p.join()


On Thu, 2012-04-12 at 11:15 -0700, Al Niessner wrote:

 I am not subscribed to these lists but I do check them occasionally and
 will check them more frequently looking for a response.

 I am getting a pickling error that I do not understand. It seems the
 shared arrays that I create cannot be pickled. Makes the
 multiprocessing.Array fairly useless if it cannot be pickled. Hence, I
 am guessing that I am doing something wrong and would like some help
 spotting it.

 This is basically a cut and paste from the examples in the
 documentation:

 import ctypes
 import multiprocessing

 def subproc (a, i):
 print (From subprocess  + str(i))
 print (a[:])
 return

 if __name__ == __main__:
 nproc = 3
 print (\nBuilding the array for the second computation.)
 b = multiprocessing.Array (ctypes.c_double, nproc*nproc, lock=False)

 print (\nSending the task across to see what happens.)
 pool = multiprocessing.Pool(nproc)
 for i in range(nproc): pool.apply_async (subproc, kwds={'a':b,
 'i':i})
 pool.close()
 pool.join()
 pass

 Whether I run it on 2.6, 2.7, or 3.2 I get the same error.

 Exception in thread Thread-1:
 Traceback (most recent call last):
   File /usr/lib/python2.6/threading.py, line 532, in __bootstrap_inner
 self.run()
   File /usr/lib/python2.6/threading.py, line 484, in run
 self.__target(*self.__args, **self.__kwargs)
   File /usr/lib/python2.6/multiprocessing/pool.py, line 225, in
 _handle_tasks
 put(task)
 PicklingError: Can't pickleclass
 'multiprocessing.sharedctypes.c_double_Array_9': attribute lookup
 multiprocessing.sharedctypes.c_double_Array_9 failed


 Anyone want to take a stab as to why this error message is being
 generated? Again I have tried python 2.6.7, 2.7.2+, and 3.2.2.

 Thanks for any and all help in advance.





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Re: Sockets accept() in child processes

On Thu, Apr 12, 2012 at 10:48 AM, Merwin merwin@gmail.com wrote:

Le 12/04/2012 19:10, Dan Stromberg a écrit :

I wonder if this'll do what you need:
https://trac.calendarserver.**org/browser/CalendarServer/**
trunk/twext/python/sendfd.pyhttps://trac.calendarserver.org/browser/CalendarServer/trunk/twext/python/sendfd.py

The problem is that this is Linux-only solution, and I would like to keep
a multi-platform compatibility.

I suspect it's actually pretty multiplatform, with one likely exception:
Windows. But the code itself is from Apple, and I first learned of the
technique in Unix's heyday.

There are other ways to do this : use a Lock and do the select() directly
in the children processes,
but I can't control which process will get the lock, and it's totally
possible that only 2 processes on 8
will accept connections alternatively.

If you have all your children bind using SO_REUSEADDR, and then have the
parent process pass a go ahead message to an available child, you might
get what you desire. The unavailable child would then pass a I'm
available again message back to the parent when ready for another piece of
work.

The children probably should also be able to send a I'm done with the
socket message to the parent as well, so the parent doesn't ask two
children to use the socket at the same time.

This is kind of weird, but it seems to satisfy your requirement.

I believe SO_REUSEADDR is even more cross-platform than passing a
filedescriptor.

Better still, don't have the children interact with the main socket; just
let them get a complete message describing a piece of work from the
parent. This isn't as likely to run into OS idiosyncrasies.
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Re: older woman and young guy

2012-04-12 Thread jimmy970

http://porn-extreme.2304310.n4.nabble.com/
http://porn-extreme.2304310.n4.nabble.com/ 

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Re: Why does this hang sometimes?

2012-04-12 Thread Jesse Jaggars

Possibly. I wonder what the difference(s) is(are)?

On Sat, Apr 7, 2012 at 5:54 PM, Jason Friedman ja...@powerpull.net wrote:
 I am just playing around with threading and subprocess and found that
 the following program will hang up and never terminate every now and
 again.

 import threading
 import subprocess
 import time

 def targ():
    p = subprocess.Popen([/bin/sleep, 2])
    while p.poll() is None:
        time.sleep(1)

 t1 = threading.Thread(target=targ)
 t2 = threading.Thread(target=targ)
 t1.start()
 t2.start()

 t1.join()
 t2.join()


 I found this bug, and while it sounds similar it seems that it was
 closed during python 2.5 (I'm using 2.7.2):
 http://bugs.python.org/issue1404925

 I can confirm hanging on my installation of 2.7.2.  I also ran this
 code 100 times on 3.2.2 without experiencing a hang.  Is version 3.x a
 possibility for you?
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GNTP not connecting

2012-04-12 Thread milosh zorica

hey folks

seems GNTP doesn't work for me. the growl app itself works cool


import gntp.notifier

gntp.notifier.mini(message)

-

Traceback (most recent call last):
  File stdin, line 1, in module
  File 
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/gntp/notifier.py,
line 48, in mini
result = growl.register()
  File 
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/gntp/notifier.py,
line 128, in register
return self._send('register', register)
  File 
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/gntp/notifier.py,
line 221, in _send
s.connect((self.hostname, self.port))
  File 
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py,
line 224, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 61] Connection refused


thanks
m.



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http://www.linkedin.com/in/miloshzorica

phone: +44 20 8144 5294  +1 206 350 9734
e-mail: miloshzor...@gmail.com
skype: milosh.zorica
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Re: GNTP not connecting

On Fri, Apr 13, 2012 at 7:32 AM, milosh zorica miloshzor...@gmail.com wrote:
    s.connect((self.hostname, self.port))
 socket.error: [Errno 61] Connection refused

This is saying that the computer at that hostname is running, but no
program is listening on that port. Maybe you have the host/port wrong,
or maybe something needs to be running on that computer.

ChrisA
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Re: Deep merge two dicts?


On 4/12/2012 19:59, John Nagle wrote:

On 4/12/2012 10:41 AM, Roy Smith wrote:

Is there a simple way to deep merge two dicts? I'm looking for Perl's
Hash::Merge (http://search.cpan.org/~dmuey/Hash-Merge-0.12/Merge.pm)
in Python.


def dmerge(a, b) :
   for k in a :
v = a[k]
if isinstance(v, dict) and k in b:
dmerge(v, b[k])
   a.update(b)


There are a few problems with that code:
1) you don't make sure that b[k] is a dict so
   a={'a':{'b':1}}; b={'a':1}
   make it crash.
2) the last update overwrites nested updates, but this could be the 
intended behavior.

For instance, with the 'a' and 'b' above, the result would be
{'a':1}

Kiuhnm
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Re: GNTP not connecting

On Fri, Apr 13, 2012 at 7:44 AM, milosh zorica miloshzor...@gmail.com wrote:
 yes but what?

 everything else works cool and i can connect via socket from python

 On Thu, Apr 12, 2012 at 6:38 PM, Chris Angelico ros...@gmail.com wrote:
 On Fri, Apr 13, 2012 at 7:32 AM, milosh zorica miloshzor...@gmail.com 
 wrote:
    s.connect((self.hostname, self.port))
 socket.error: [Errno 61] Connection refused

 This is saying that the computer at that hostname is running, but no
 program is listening on that port. Maybe you have the host/port wrong,
 or maybe something needs to be running on that computer.

 ChrisA
 --
 http://mail.python.org/mailman/listinfo/python-list

I'm hoping you meant for that reply to be on-list, and am myself
replying on-list.

You can connect to that (host,port) using Python? In that case, check
that the right host/port is being used by growl - possibly there's a
parameter you need to check. I can't help any further though, as I
have no experience with growl.

ChrisA
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Re: GNTP not connecting

2012-04-12 Thread milosh zorica

thanks

On Thu, Apr 12, 2012 at 7:30 PM, Chris Angelico ros...@gmail.com wrote:
 On Fri, Apr 13, 2012 at 7:44 AM, milosh zorica miloshzor...@gmail.com wrote:
 yes but what?

 everything else works cool and i can connect via socket from python

 On Thu, Apr 12, 2012 at 6:38 PM, Chris Angelico ros...@gmail.com wrote:
 On Fri, Apr 13, 2012 at 7:32 AM, milosh zorica miloshzor...@gmail.com 
 wrote:
    s.connect((self.hostname, self.port))
 socket.error: [Errno 61] Connection refused

 This is saying that the computer at that hostname is running, but no
 program is listening on that port. Maybe you have the host/port wrong,
 or maybe something needs to be running on that computer.

 ChrisA
 --
 http://mail.python.org/mailman/listinfo/python-list

 I'm hoping you meant for that reply to be on-list, and am myself
 replying on-list.

 You can connect to that (host,port) using Python? In that case, check
 that the right host/port is being used by growl - possibly there's a
 parameter you need to check. I can't help any further though, as I
 have no experience with growl.

 ChrisA
 --
 http://mail.python.org/mailman/listinfo/python-list



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http://www.linkedin.com/in/miloshzorica

phone: +44 20 8144 5294  +1 206 350 9734
e-mail: miloshzor...@gmail.com
skype: milosh.zorica
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Re: is this foolish?

2012-04-12 Thread Cameron Simpson

On 12Apr2012 10:44, gene heskett ghesk...@wdtv.com wrote:
| On Thursday, April 12, 2012 10:40:47 AM Tim Golden did opine:
|  On 12/04/2012 10:35, Cameron Simpson wrote:
|   I've found myself using a Python gotcha as a feature.
|  
| Tim:  your setup of using the CC: line for every thing with a blank To: 
| line is landing your posts in my spam folder.  Do you have a specific 
| reason for not using a To: line?
| 
| I am not inclined to change my filer rules because that particular rule 
| catches a lot of the incoming spam.

This should probably be offline, but can you outline your rule?
Almost all my rules match on either to or cc happily and I don't know of
a spam pattern that would benefit from treating them differently.
-- 
Cameron Simpson c...@zip.com.au DoD#743
http://www.cskk.ezoshosting.com/cs/

The laws of thermodynamics state that you can't win, you can't break even,
and you can't even quit the game.  Most human institutions are based on the
belief that you can break one of the three laws -- capitalism assumes you can
win, socialism assumes you can break even, and religion assumes you can quit
the game.
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remainder of dividing by zero

2012-04-12 Thread Ethan Furman

Okay, so I haven't asked a stupid question in a long time and I'm 
suffering withdrawal symptoms... ;)


5 % 0 = ?

It seems to me that the answer should be 5: no matter how many times we 
add 0 to itself, the remainder of the intermediate step will be 5.


Is there a postulate or by definition answer as to why this should not 
be so?


~Ethan~
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Re: functions which take functions


On 4/12/2012 19:29, Jan Kuiken wrote:

On 4/9/12 20:57 , Kiuhnm wrote:


Do you have some real or realistic (but easy and self-contained)
examples when you had to define a (multi-statement) function and pass it
to another function?


I don't use it daily but the first argument of list.sort, i.e. the
compare function springs to mind.


Yes, I guess there are times when a lambda is not enough and one needs 
to define a real function.

Thanks.

Kiuhnm
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Re: remainder of dividing by zero

2012-04-12 Thread Terry Reedy


On 4/12/2012 6:34 PM, Ethan Furman wrote:

Okay, so I haven't asked a stupid question in a long time and I'm
suffering withdrawal symptoms... ;)

5 % 0 = ?

It seems to me that the answer should be 5: no matter how many times we
add 0 to itself, the remainder of the intermediate step will be 5.

Is there a postulate or by definition answer as to why this should not
be so?


0 = M % N  N
no solution for N == 0

m // n, m % n = divmod(m, n), which is to say, divmod is the fundamental 
recursively defined operation and // and % are each one of the 
components with the other ignored. m % n = divmod(m, n)[1]

and divmod is not defined for n == 0

def divmod(m, n):  # m, n not negative
  q, r = 0, m
  while m = n:
q, r = q+1, r-n
  return q, r

Of course, given m, n in base n representation, the way you learned to 
do it in school is faster. In binary, it is even easier because each 
digit is 0 or 1 so no guessing needed as with base 10.


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Re: remainder of dividing by zero

2012-04-12 Thread MRAB


On 12/04/2012 23:34, Ethan Furman wrote:

Okay, so I haven't asked a stupid question in a long time and I'm
suffering withdrawal symptoms... ;)

5 % 0 = ?

It seems to me that the answer should be 5: no matter how many times we
add 0 to itself, the remainder of the intermediate step will be 5.

Is there a postulate or by definition answer as to why this should not
be so?


If x  0, 0 = 5 % x  x.

At the limit of x == 0, you get 0 = 5 % 0  0.

At that point, an exception is probably a good idea! :-)
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Re: Mouse LED Control in Python

2012-04-12 Thread Shaunda

How can I make a battery powered 
http://www.ledstrips8.com/led-light-bars-c-38.html led strip 12v   with 3
way switches?
My goal is to make a long line of grouped LEDs that is battery powered and
can be turned on or off from 2 different locations. I'm trying to make a
lighting system that doesn't make me have to turn on several individual
lamps as I find them along my path.

I will be making a line with 8  http://www.ledstrips8.com/ waterproof led
strip light  (lamp being a cluster of 6 LEDs), but I have no idea as to
how to go about making the line.

How should I set up the circuit to have all of them retain their brightness?

I need a battery that is rechargeable, so I am making one on
cheapbatterypacks.com. What size battery will I need to make (voltage and
mAh) to power this setup?  LEDs are RL5-W18030 at 
http://www.ledstrips8.com/flexible-led-strip-lighting-c-32.html blue led
strip 

I know I need a 3 way switch to turn them on and off with 2 switches, but
I'm not sure how to wire them into the circuit. Any advice?

I don't have a lot of experience with electronics, so some explanations
would be greatly appreciated.

Thanks for you help!

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Re: python module development workflow

2012-04-12 Thread rusi

On Apr 11, 8:38 pm, Peng Yu pengyu...@gmail.com wrote:
 On Apr 11, 10:25 am, John Gordon gor...@panix.com wrote:

  In 2900f481-fbe9-4da3-a7ca-5485d1ceb...@m13g2000yqc.googlegroups.com Peng 
  Yu pengyu...@gmail.com writes:

   It is confusing to me what the best workflow is for python module
   development. There is setup.py, egg. Also, pip, easy_install.

  It's unclear what you are asking.

  How to develop your own modules?

  How to package and distribute your own modules once they're finished?

 I'm asking these two questions.

You need to ask these two questions separately.

For the first you'll get good answers here if you can be more
specific.

The second is a good question which will not get useful answers
because python's package and distribute system(s) are in a flux.  In
all fairness this is so for most languages which have as bad messes in
this domain. eg Haskell's cabal
http://cdsmith.wordpress.com/2011/01/16/haskells-own-dll-hell/
http://ivanmiljenovic.wordpress.com/2010/03/15/repeat-after-me-cabal-is-not-a-package-manager/
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[issue14532] multiprocessing module performs a time-dependent hmac comparison

2012-04-12 Thread STINNER Victor


STINNER Victor victor.stin...@gmail.com added the comment:

+def time_independent_equals(a, b):
+if len(a) != len(b):
+return False

This is not time independent. Is it an issue?

+if type(a[0]) is int:

It's better to write isinstance(a, bytes). You should raise a
TypeError if a is not a bytes or str.

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[issue1859] textwrap doesn't linebreak on \n

2012-04-12 Thread Otto Kekäläinen


Otto Kekäläinen o...@seravo.fi added the comment:

As a note to comments msg60038-msg60040, for anybody like me who ended up here 
after Googling around on how to do wordwrap in Python:

The function textwrap in Python is for single strings/paragraphs only, and it 
does not work as wordwrap normally works in text editors or other programming 
languages (eg. Wordwrap in Python).


If you want to do wordwrap or a block of text, run something like this:

new_msg = 
lines = msg.split(\n)

for line in lines:
if len(line)  75:
w = textwrap.TextWrapper(width=75, break_long_words=False)
line = '\n'.join(w.wrap(line))

new_msg += line + \n

An use case example for this would be, if you have a email message and you want 
to apply word wrapping to it, so that no line would be over 78 characters.

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[issue1859] textwrap doesn't linebreak on \n

2012-04-12 Thread Otto Kekäläinen


Otto Kekäläinen o...@seravo.fi added the comment:

In previous comment: (eg. Wordwrap in Python) - (wordwrap() in PHP)

Some examples of how this function works on text blocks:

Original text:

--
*Maksaako riippuvuus yksittäisestä ohjelmistoyritykstä Helsingille vuosittain 
3,4 miljoonaa euroa?*


Helsingin kaupungin raportti OpenOffice-pilottihankkeesta tuottaa 
kaupunkilaisille enemmän kysymyksiä kuin vastauksia. Kaupunki kokeili avoimen 
lähdekoodin hyötyohjelmistopakettia kaupunginvaltuuston jäsenten kannettavissa 
tietokoneissa kymmenen kuukauden ajan vuonna 2011. Ohjelmistopaketti sai 
käyttäjiltä laajan hyväksynnän. Kokeilun päätyttyä kaupunki tuotti pilotista 
raportin, jonka mukaan OpenOfficen käyttöönotto koko virkamieskunnalle tulisi 
hyvin kalliiksi.

Kaupungin raportti väittää, että maksaisi 3,4 miljoonaa euroa vuodessa käyttää 
OpenOfficea. Luku vaikuttaa yllättävän isolta ja raportti ei selosta, miten 
lukuun on päädytty, sanoo Otto Kekäläinen, Euroopan vapaiden ohjelmien säätiö 
(Free Software Foundation Europe, FSFE), Suomen paikalliskoordinaattori. Ilman 
tarkkoja tietoja, luku vaikuttaa perusteettomalta. Ilmeisesti Helsingin 
hallinto ei raporttia laatiessaan edes ollut yhteydessä yleisiin 
OpenOffice-palveluiden tarjoajiin tiedustellaakseen hintoja.
--

Applying
msg.message_body = textwrap.fill(msg.message_body_unwrapped, 75)

--
 *Maksaako
riippuvuus yksittäisestä ohjelmistoyritykstä Helsingille vuosittain
3,4 miljoonaa euroa?*   Helsingin kaupungin raportti OpenOffice-
pilottihankkeesta tuottaa kaupunkilaisille enemmän kysymyksiä kuin
vastauksia. Kaupunki kokeili avoimen lähdekoodin
hyötyohjelmistopakettia kaupunginvaltuuston jäsenten kannettavissa
tietokoneissa kymmenen kuukauden ajan vuonna 2011. Ohjelmistopaketti
sai käyttäjiltä laajan hyväksynnän. Kokeilun päätyttyä
kaupunki tuotti pilotista raportin, jonka mukaan OpenOfficen
käyttöönotto koko virkamieskunnalle tulisi hyvin kalliiksi.
Kaupungin raportti väittää, että maksaisi 3,4 miljoonaa euroa
vuodessa käyttää OpenOfficea. Luku vaikuttaa yllättävän isolta
ja raportti ei selosta, miten lukuun on päädytty, sanoo Otto
Kekäläinen, Euroopan vapaiden ohjelmien säätiö (Free Software
Foundation Europe, FSFE), Suomen paikalliskoordinaattori. Ilman
tarkkoja tietoja, luku vaikuttaa perusteettomalta. Ilmeisesti
Helsingin hallinto ei raporttia laatiessaan edes ollut yhteydessä
yleisiin OpenOffice-palveluiden tarjoajiin tiedustellaakseen hintoja.
--


Applying
msg.message_body = textwrap.fill(msg.message_body_unwrapped, 75, 
break_long_words=False, replace_whitespace=False)

--
*Maksaako
riippuvuus yksittäisestä ohjelmistoyritykstä Helsingille vuosittain
3,4 miljoonaa euroa?*


Helsingin kaupungin raportti OpenOffice-
pilottihankkeesta tuottaa kaupunkilaisille enemmän kysymyksiä kuin
vastauksia. Kaupunki kokeili avoimen lähdekoodin
hyötyohjelmistopakettia kaupunginvaltuuston jäsenten kannettavissa
tietokoneissa kymmenen kuukauden ajan vuonna 2011. Ohjelmistopaketti
sai käyttäjiltä laajan hyväksynnän. Kokeilun päätyttyä
kaupunki tuotti pilotista raportin, jonka mukaan OpenOfficen
käyttöönotto koko virkamieskunnalle tulisi hyvin kalliiksi.
Kaupungin raportti väittää, että maksaisi 3,4 miljoonaa euroa
vuodessa käyttää OpenOfficea. Luku vaikuttaa yllättävän isolta
ja raportti ei selosta, miten lukuun on päädytty, sanoo Otto
Kekäläinen, Euroopan vapaiden ohjelmien säätiö (Free Software
Foundation Europe, FSFE), Suomen paikalliskoordinaattori. Ilman
tarkkoja tietoja, luku vaikuttaa perusteettomalta. Ilmeisesti
Helsingin hallinto ei raporttia laatiessaan edes ollut yhteydessä
yleisiin OpenOffice-palveluiden tarjoajiin tiedustellaakseen hintoja.
--

In case this bug report form wraps the text, you can also view the it at 
pastebin: http://pastebin.com/y6icAJC6

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[issue14452] SysLogHandler sends invalid messages when using unicode

2012-04-12 Thread Gregory P. Smith


Gregory P. Smith g...@krypto.org added the comment:

Your three step approach makes sense... But it _is_ still technically a new API 
though in that the UTF8BOM placeholder for LogRecord's is being introduced.  
What would the behavior be when run on an older version without support for 
that placeholder be?

I'm okay with adding this but wouldn't be surprised if release managers are 
not.  But I personally have no need for syslog logging from Python so it'd be 
better to have someone who needs this to work properly chime in.

Perhaps just fixing it nicely in 3.3 is sufficient while documenting the 
misbehavior as a known issue for 2.7 and 3.2.

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[issue14538] HTMLParser: parsing error

2012-04-12 Thread Georg Brandl


Georg Brandl ge...@python.org added the comment:

ISTM that meta /  is neither valid HTML nor valid XHTML.

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[issue14559] (2.7.3 Regression) PC\8.0 directory can no longer be used to build on windows

2012-04-12 Thread Mitchell Blank Jr


New submission from Mitchell Blank Jr m-pyt...@bodyfour.com:

In the diff between 2.7.2 and 2.7.3, we see:

--- Python-2.7.2/PCbuild/pythoncore.vcproj  2011-06-11 08:46:27.0 
-0700
+++ Python-2.7.3/PCbuild/pythoncore.vcproj  2012-04-09 16:07:35.0 
-0700
@@ -1835,6 +1835,10 @@

/File
File
+   RelativePath=..\Python\random.c
+   
+   /File
+   File
RelativePath=..\Python\structmember.c

/File

...however there isn't any similar change to PC\VS8.0\pythoncore.vcproj , 
PC\VS7.1\pythoncore.vcproj, nor PC\VC6\pythoncore.dsp

I don't know if any of those are deprecated, but the VS8.0 .vcproj's definitely 
worked in 2.7.2.  In 2.7.3 the missing random.obj file causes python27.dll to 
fail to link and everything goes downhill from there.

Hand-applying the same change to the PC\VS8.0 directory fixed the problem for 
me.

--
components: Build
messages: 158110
nosy: mitchblank
priority: normal
severity: normal
status: open
title: (2.7.3 Regression)  PC\8.0 directory can no longer be used to build on 
windows
type: compile error
versions: Python 2.7

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[issue14554] test module: correction

2012-04-12 Thread Tshepang Lekhonkhobe


Changes by Tshepang Lekhonkhobe tshep...@gmail.com:


--
keywords: +patch
Added file: http://bugs.python.org/file25187/correction.diff

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[issue14538] HTMLParser: parsing error

2012-04-12 Thread Ezio Melotti


Ezio Melotti ezio.melo...@gmail.com added the comment:

Here's a patch.

--
keywords: +patch
stage: test needed - patch review
Added file: http://bugs.python.org/file25188/issue14538.diff

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[issue12537] mailbox's _become_message is very fragile

2012-04-12 Thread David Lam


David Lam d...@dlam.me added the comment:

Wow, cool!  Thanks for the update.

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[issue14548] garbage collection just after multiprocessing's fork causes exceptions

2012-04-12 Thread Charles-François Natali


Charles-François Natali neolo...@free.fr added the comment:

 That's a problem indeed. Perhaps we need a global fork lock shared
 between subprocess and multiprocessing?

 I did an atfork patch which included a (recursive) fork lock.  See

    http://bugs.python.org/review/6721/show

 The patch included changes to multiprocessing and subprocess.  (Being able to 
 acquire the lock when doing fd manipulation is quite useful.  For instance, 
 the creation of Process.sentinel currently has a race which can mean than 
 another process inherits the write end of the pipe.  That would cause 
 Process.join() to wait till both processes terminate.)

Indeed, I had a look and it looked good.
I just had a couple minor comments, I'll try to get back to this later
today, or by the end of the week.

 Actually, for Finalizers I think it would be easier to just record and check 
 the pid.

I'd prefer this too.

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[issue14560] urllib2 cannot make POST with utf-8 content


New submission from Андрей Р lans...@gmail.com:

Issue can be found only in 2.7, in 2.6.6 it works

System:
Linux strix 3.2.14-1-ARCH x86_64
Python information:
Python 2.7.2 (default, Jan 31 2012, 13:19:49) [GCC 4.6.2 20120120 
(prerelease)] on linux2

Snippet to reproduce error:

# -*- encoding: utf-8 -*-
import urllib2

request = urllib2.Request('http://google.com', u'Контент', {'Content-Type': 
'text/plain; charset=utf-8'})
urllib2.urlopen(request).read()

Stacktrace:

Traceback (most recent call last):
  File stdin, line 1, in module
  File /usr/lib/python2.7/urllib2.py, line 126, in urlopen
return _opener.open(url, data, timeout)
  File /usr/lib/python2.7/urllib2.py, line 394, in open
response = self._open(req, data)
  File /usr/lib/python2.7/urllib2.py, line 412, in _open
'_open', req)
  File /usr/lib/python2.7/urllib2.py, line 372, in _call_chain
result = func(*args)
  File /usr/lib/python2.7/urllib2.py, line 1199, in http_open
return self.do_open(httplib.HTTPConnection, req)
  File /usr/lib/python2.7/urllib2.py, line 1168, in do_open
h.request(req.get_method(), req.get_selector(), req.data, headers)
  File /usr/lib/python2.7/httplib.py, line 955, in request
self._send_request(method, url, body, headers)
  File /usr/lib/python2.7/httplib.py, line 989, in _send_request
self.endheaders(body)
  File /usr/lib/python2.7/httplib.py, line 951, in endheaders
self._send_output(message_body)
  File /usr/lib/python2.7/httplib.py, line 815, in _send_output
self.send(message_body)
  File /usr/lib/python2.7/httplib.py, line 787, in send
self.sock.sendall(data)
  File /usr/lib/python2.7/socket.py, line 224, in meth
return getattr(self._sock,name)(*args)

--
components: Unicode
messages: 158114
nosy: ezio.melotti, Андрей.Р
priority: normal
severity: normal
status: open
title: urllib2 cannot make POST with utf-8 content
versions: Python 2.7

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[issue14560] urllib2 cannot make POST with utf-8 content


Андрей Р lans...@gmail.com added the comment:

# -*- encoding: utf-8 -*-
import urllib2

request = urllib2.Request('http://google.com', u'Контент'.encode(utf-8), 
{'Content-Type': 'text/plain; charset=utf-8'})
urllib2.urlopen(request).read()

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[issue14560] urllib2 cannot make POST with utf-8 content


Changes by Андрей Р lans...@gmail.com:


--
status: open - closed

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[issue14560] urllib2 cannot make POST with utf-8 content


Андрей Р lans...@gmail.com added the comment:

Sorry. My fault

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[issue14452] SysLogHandler sends invalid messages when using unicode

2012-04-12 Thread Vinay Sajip


Vinay Sajip vinay_sa...@yahoo.co.uk added the comment:

 What would the behavior be when run on an older version without support for 
 that placeholder be?

Then it would fail when the format string contained e.g. %(UTF8BOM)s and there 
was no corresponding attribute in the LogRecord - but that's true of any 
feature which is introduced in newer Pythons. I get that it would be unexpected 
in a point release, and that's why I've posted about this on c.l.py (no 
feedback from there so far).

 I'm okay with adding this but wouldn't be surprised if release managers are 
 not.

Hence the post to python-dev, but no release manager has expressed an opinion 
yet.

 Perhaps just fixing it nicely in 3.3 is sufficient while documenting the 
 misbehavior as a known issue for 2.7 and 3.2.

This is doable at a user level, except for the fact that the BOM insertion is 
currently unconditional. If I just remove the BOM insertion in 2.7 and 3.2, 
then I don't need to do the UTF8BOM placeholder thing in the stdlib; I could 
just add a cookbook recipe telling users how to do it. I am thinking about a 
different solution for 3.3 anyway, i.e. adding one or more overridable methods 
to SysLogHandler.

Since no one has objected on c.l.py about the proposed change (which implied 
that if there were no objections, the change would happen) Marko may be right 
that not many people are affected, or care. I'll wait a little while longer, 
and if no objections are forthcoming I'll remove the BOM insertion in 2.7 and 
3.2, add a cookbook recipe for those who need a BOM and leave it at that for 
those versions.

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[issue9377] socket, PEP 383: Mishandling of non-ASCII bytes in host/domain names

2012-04-12 Thread Nick


Nick spaun2002mob...@gmail.com added the comment:

I faced with the issue on my own PC. For a Russian version of WinOS default PC 
name is ИВАН-ПК (C8 C2 C0 CD 2D CF CA in hex) and it returns from gethostbyaddr 
(CRT) exactly in this form (encoded with system locale cp1251 not UTF8). So 
when the function PyUnicode_FromString is called, it expects that argument is 
utf8 encoded string and throws and error.
A lot of 3rd party modules use gethostbyaddr or getfqdn (which uses 
gethostbyaddr) and I can't just use function that returns names as bytes. 
Surrogate names are also not acceptable because the name mentioned above 
becomes -??

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[issue14561] python-2.7.2-r3 suffers test failure at test_mhlib

2012-04-12 Thread Ian Delaney


New submission from Ian Delaney del...@iinet.com.au:

Testing test suite of pyth-2.7.
Re-running failed tests in verbose mode
Re-running test 'test_mhlib' in verbose mode
test_basic (test.test_mhlib.MhlibTests) ... ok
test_listfolders (test.test_mhlib.MhlibTests) ... FAIL

It seems to be pinned down to this one line in test that failed.

ok, it comes down to this.  From test_mhlib.py

def test_listfolders(self):
mh = getMH()
eq = self.assertEqual

#tfolders.sort()\\ Line 184
#eq(folders, tfolders)  \\ Line 185

Commenting them out removes the source of error. The lines that trips up 
include at least 185, 189, 193.  The 'folders' are not equal.

Bug filed in gentoo bugzilla; Bug 387967; 21-10-2011.

The build log from that bug in Comment 2

https://bugs.gentoo.org/attachment.cgi?id=290409

--
components: Tests
messages: 158119
nosy: idella5
priority: normal
severity: normal
status: open
title: python-2.7.2-r3 suffers test failure at test_mhlib
type: behavior
versions: Python 2.7

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[issue14560] urllib2 cannot make POST with utf-8 content

2012-04-12 Thread Senthil Kumaran


Changes by Senthil Kumaran sent...@uthcode.com:


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[issue14557] HP-UX libraries not included

2012-04-12 Thread Charles-François Natali


Charles-François Natali neolo...@free.fr added the comment:

Hello Adi,

Thanks for your patch.

Just a detail:


 if platform == 'hp-ux11':
 lib_dirs += ['/usr/lib/hpux64', '/usr/lib/hpux32']


Wouldn't it be more robust as:

 if platform.startswith('hp-ux'):
 lib_dirs += ['/usr/lib/hpux64', '/usr/lib/hpux32']


So that it works with older and (potenttially) future HP-UX releases?

--
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stage:  - patch review

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[issue14557] HP-UX libraries not included

2012-04-12 Thread Adi Roiban


Adi Roiban a...@roiban.ro added the comment:

Hi,

startswith('hp-ux') should also work as in real world it should be synonym with 
hp-ux11 ... see my reasoning below

I used 'hp-ux11' since this was the system I have access to and can test and I 
was not brave enought to assume that the patch will work on future or past 
version.

According to wikipedia HP-UX 11.00 was relesed in 1997... and I see a trend to 
change the minor version number . Latest is 11.31 released in 2007...

HPUX 10 is from 1995 and I am not sure if Python will work at all on such a 
system.

As a side node, i think that  HPUX will slowly die and we will not see an HP-UX 
12.

Cheers,
Adi

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[issue14412] Sqlite Integer Fields

2012-04-12 Thread Mendez


Mendez goatsofmen...@users.sourceforge.net added the comment:

I've tested the released 2.7.3 and this works fine so there must just have been 
some oddity with the packaging of sqlite in rc2.

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[issue14412] Sqlite Integer Fields

2012-04-12 Thread Benjamin Peterson


Benjamin Peterson benja...@python.org added the comment:

Great!

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resolution:  - out of date
status: open - closed

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[issue14562] urllib2 maybe blocks too long

2012-04-12 Thread Anrs Hu


New submission from Anrs Hu anders.x...@gmail.com:

If HTTP URL response's Transfer-Encoding is 'Chunked', then the 
urllib2.urlopen(URL).readline() will block until there're enough 8192 bytes, 
even though the first chunk is just a line. 

Every chunks should be processed as soon as posible, so the readline() behavior 
should read a line and return immediately, rather than read 8K data to buffer 
and look up a line from the buffer.

--
components: Library (Lib)
messages: 158124
nosy: Anrs.Hu
priority: normal
severity: normal
status: open
title: urllib2 maybe blocks too long
type: behavior
versions: Python 2.7

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[issue14562] urllib2 maybe blocks too long

2012-04-12 Thread Senthil Kumaran


Senthil Kumaran sent...@uthcode.com added the comment:

I am trying to this test this to determine the fault.

--
assignee:  - orsenthil
nosy: +orsenthil
versions: +Python 3.2, Python 3.3

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[issue14556] telnetlib Telnet.expect fails with timeout=0

2012-04-12 Thread R. David Murray


R. David Murray rdmur...@bitdance.com added the comment:

Ah, so there are actually two timeouts of interest.  One is time out if there 
is no more data for X seconds, and the other is time out if there is no match 
for X seconds.  It used to do the former, now it does the latter.

I think you get the former by calling socket.settimeout() and then using a 
blocking call for the expect.

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[issue14563] Segmentation fault on ctypes.Structure subclass with byte string field names

2012-04-12 Thread aliles


New submission from aliles aaron.i...@gmail.com:

Python 3.2 will exit with a segmentation fault if a byte string is used as a 
field name in a subclass of ctypes.Structure.

Python 3.2.2 (default, Dec 18 2011, 18:56:20) 
[GCC 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00)] on darwin
Type help, copyright, credits or license for more information.
 import ctypes
 class Point(ctypes.Structure):
... _fields_ = ((b'x', ctypes.c_int), (b'y', ctypes.c_int))
... 
Segmentation fault: 11

This also occurs if None or an int is used as the field name.

I would expect that a TypeError exception would be raised if an attempt is made 
to use an invalid type for the field name.

--
components: ctypes
files: segfault.py
messages: 158127
nosy: aliles
priority: normal
severity: normal
status: open
title: Segmentation fault on ctypes.Structure subclass with byte string field 
names
type: crash
versions: Python 3.2
Added file: http://bugs.python.org/file25189/segfault.py

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[issue14399] zipfile and creat/update comment

2012-04-12 Thread Serhiy Storchaka


Serhiy Storchaka storch...@gmail.com added the comment:

Thank you, the TypeError test helped me find the error. Here is the
corrected patch.

For 2.7 it was necessary to turn the ZipFile in the new-style class.

--
Added file: http://bugs.python.org/file25190/fix_zipfile_comment_4.patch
Added file: http://bugs.python.org/file25191/fix_zipfile_comment_4-2.7.patch

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___diff -r bd353f12c007 Lib/test/test_zipfile.py
--- a/Lib/test/test_zipfile.py  Wed Apr 11 20:15:10 2012 -0400
+++ b/Lib/test/test_zipfile.py  Thu Apr 12 10:44:42 2012 +0300
@@ -970,6 +970,30 @@
 with zipfile.ZipFile(TESTFN, mode=r) as zipfr:
 self.assertEqual(zipfr.comment, comment2)
 
+def test_unicode_comment(self):
+def setcomment(zipf, comment):
+zipf.comment = comment
+with zipfile.ZipFile(TESTFN, w, zipfile.ZIP_STORED) as zipf:
+zipf.writestr(foo.txt, O, for a Muse of Fire!)
+self.assertRaises(TypeError, setcomment, zipf,
+  this is a comment)
+
+def test_change_comment_in_empty_archive(self):
+with zipfile.ZipFile(TESTFN, a, zipfile.ZIP_STORED) as zipf:
+self.assertFalse(zipf.filelist)
+zipf.comment = bthis is a comment
+with zipfile.ZipFile(TESTFN, r) as zipf:
+self.assertEqual(zipf.comment, bthis is a comment)
+
+def test_change_comment_in_nonempty_archive(self):
+with zipfile.ZipFile(TESTFN, w, zipfile.ZIP_STORED) as zipf:
+zipf.writestr(foo.txt, O, for a Muse of Fire!)
+with zipfile.ZipFile(TESTFN, a, zipfile.ZIP_STORED) as zipf:
+self.assertTrue(zipf.filelist)
+zipf.comment = bthis is a comment
+with zipfile.ZipFile(TESTFN, r) as zipf:
+self.assertEqual(zipf.comment, bthis is a comment)
+
 def check_testzip_with_bad_crc(self, compression):
 Tests that files with bad CRCs return their name from testzip.
 zipdata = self.zips_with_bad_crc[compression]
diff -r bd353f12c007 Lib/zipfile.py
--- a/Lib/zipfile.pyWed Apr 11 20:15:10 2012 -0400
+++ b/Lib/zipfile.pyThu Apr 12 10:44:42 2012 +0300
@@ -698,7 +698,7 @@
 self.compression = compression  # Method of compression
 self.mode = key = mode.replace('b', '')[0]
 self.pwd = None
-self.comment = b''
+self._comment = b''
 
 # Check if we were passed a file-like object
 if isinstance(file, str):
@@ -774,7 +774,7 @@
 print(endrec)
 size_cd = endrec[_ECD_SIZE] # bytes in central directory
 offset_cd = endrec[_ECD_OFFSET] # offset of central directory
-self.comment = endrec[_ECD_COMMENT] # archive comment
+self._comment = endrec[_ECD_COMMENT] # archive comment
 
 # concat is zero, unless zip was concatenated to another file
 concat = endrec[_ECD_LOCATION] - size_cd - offset_cd
@@ -886,6 +886,24 @@
 else:
 self.pwd = None
 
+@property
+def comment(self):
+The comment text associated with the ZIP file.
+return self._comment
+
+@comment.setter
+def comment(self, comment):
+if not isinstance(comment, bytes):
+raise TypeError(comment: expected bytes, got %s % type(comment))
+# check for valid comment length
+if len(comment) = ZIP_MAX_COMMENT:
+if self.debug:
+print('Archive comment is too long; truncating to %d bytes'
+% ZIP_MAX_COMMENT)
+comment = comment[:ZIP_MAX_COMMENT]
+self._comment = comment
+self._didModify = True
+
 def read(self, name, pwd=None):
 Return file bytes (as a string) for name.
 with self.open(name, r, pwd) as fp:
@@ -1287,18 +1305,11 @@
 centDirSize = min(centDirSize, 0x)
 centDirOffset = min(centDirOffset, 0x)
 
-# check for valid comment length
-if len(self.comment) = ZIP_MAX_COMMENT:
-if self.debug  0:
-msg = 'Archive comment is too long; truncating to %d 
bytes' \
-  % ZIP_MAX_COMMENT
-self.comment = self.comment[:ZIP_MAX_COMMENT]
-
 endrec = struct.pack(structEndArchive, stringEndArchive,
  0, 0, centDirCount, centDirCount,
- centDirSize, centDirOffset, len(self.comment))
+ centDirSize, centDirOffset, 
len(self._comment))
 self.fp.write(endrec)
-self.fp.write(self.comment)
+self.fp.write(self._comment)
 self.fp.flush()
 
 if not self._filePassed:
diff -r d60ef141e090 Lib/test/test_zipfile.py
--- a/Lib/test/test_zipfile.py  Wed Apr

[issue14532] multiprocessing module performs a time-dependent hmac comparison

2012-04-12 Thread Jon Oberheide


Jon Oberheide j...@oberheide.org added the comment:

 This is not time independent. Is it an issue?

You're correct, the length check does leak the length of the expected digest as 
a performance enhancement (otherwise, your comparison runtime is bounded by the 
length of the attackers input).

Generally, exposing the length and thereby potentially the underlying 
cryptographic hash function (eg. 20 bytes - hmac-sha1) is not considered a 
security risk for this type of scenario, whereas leaking key material certainly 
is. I considered including this nuance in the documentation and probably should.

 It's better to write isinstance(a, bytes). You should raise a
 TypeError if a is not a bytes or str.

Ack, thanks.

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[issue14538] HTMLParser: parsing error

2012-04-12 Thread Jim Jewett


Jim Jewett jimjjew...@gmail.com added the comment:

-1 on that particular patch.  

tagname / 


(with only whitespace between / and ) strikes me as obviously intending to 
close the tag, and a reasonably common error.

I can't think of any reason to support nested meta tags while not supporting 
sloppy self-closing tags.

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[issue14532] multiprocessing module performs a time-dependent hmac comparison

2012-04-12 Thread Antoine Pitrou


Antoine Pitrou pit...@free.fr added the comment:

You could rewrite:

result |= x ^ y

as:

result |= (x != y)

Of course, this assumes that the != operator is constant-time for 1-element 
strings.

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[issue14538] HTMLParser: parsing error

2012-04-12 Thread Jim Jewett


Jim Jewett jimjjew...@gmail.com added the comment:

This issue is also marked for (bugfix-only) 2.7 and 3.2.  

Unless there is a specification somewhere (or at least an editor's draft), I 
can't really see any particular parse as a bugfix.  Was the goal just to make 
the parse finish, as opposed to stopping part way through the text?

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[issue14532] multiprocessing module performs a time-dependent hmac comparison

2012-04-12 Thread Jon Oberheide


Jon Oberheide j...@oberheide.org added the comment:

 You could rewrite:
 
 result |= x ^ y
 
 as:
 
 result |= (x != y)

You could, but it's best not to introduce any conditional branching based if at 
all possible. For reference, see:

http://rdist.root.org/2009/05/28/timing-attack-in-google-keyczar-library/#comment-5783

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[issue14532] multiprocessing module performs a time-dependent hmac comparison

2012-04-12 Thread sbt


sbt shibt...@gmail.com added the comment:

Why not just

def time_independent_equals(a, b):
return len(a) == len(b) and sum(x != y for x, y in zip(a, b)) == 0

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[issue13405] Add DTrace probes


Changes by Jesús Cea Avión j...@jcea.es:


Removed file: http://bugs.python.org/file24281/5458412752d5.diff

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[issue13405] Add DTrace probes


Changes by Jesús Cea Avión j...@jcea.es:


Removed file: http://bugs.python.org/file24283/f86bb02fd8f4.diff

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[issue13405] Add DTrace probes


Changes by Jesús Cea Avión j...@jcea.es:


Added file: http://bugs.python.org/file25192/aa2dcffa267f.diff

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[issue13405] Add DTrace probes


Changes by Jesús Cea Avión j...@jcea.es:


Added file: http://bugs.python.org/file25193/1e4d2c51b2d9.diff

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[issue1859] textwrap doesn't linebreak on \n

2012-04-12 Thread Serhiy Storchaka


Serhiy Storchaka storch...@gmail.com added the comment:

Cooking recipe for Otto:

def wrap_paragraphs(text, width=70, **kwargs):
return [line for para in text.splitlines() for line in textwrap.wrap(para, 
width, **kwargs)]

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[issue14399] zipfile and creat/update comment

2012-04-12 Thread R. David Murray


R. David Murray rdmur...@bitdance.com added the comment:

Thanks.

We've had trouble in the past with a conversion to new style class breaking 
people's code.  People are less likely to be subclassing ZipFile, though, so it 
is probably OK.

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[issue13405] Add DTrace probes


Jesús Cea Avión j...@jcea.es added the comment:

Published diff from stock 2.7.3.

Cleanups and simplifications.

Marc, could you possible compile under MacOS X both 2.7 and 3.3 branches, both 
in 32 and 64 bits?.

The tags are:

dtrace-issue13405  - 3.3a2+
dtrace-issue13405_2.7  - 2.7.3

Let me know how is going. Please, document your build environment.

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[issue1065986] Fix pydoc crashing on unicode strings

2012-04-12 Thread Tom Bachmann


Tom Bachmann e_mc...@web.de added the comment:

Hello,

[this is my first bug report, so I'm sorry if I'm not adhering to some 
conventions]

in what versions of python is this supposed to be fixed? Consider:

% python
Python 2.7.2+ (default, Nov 30 2011, 19:22:03) 
[GCC 4.6.2] on linux2
Type help, copyright, credits or license for more information.
 from pydoc import pager
 from locale import getpreferredencoding
 expr = u'\u211a'
 pager(expr) # error
 pager(expr.encode(getdefaultencoding())) # works


The error is:

Traceback (most recent call last):
  File stdin, line 1, in module
  File /usr/lib/python2.7/pydoc.py, line 1318, in pager
pager(text)
  File /usr/lib/python2.7/pydoc.py, line 1332, in lambda
return lambda text: pipepager(text, os.environ['PAGER'])
  File /usr/lib/python2.7/pydoc.py, line 1359, in pipepager
pipe.write(text)
UnicodeEncodeError: 'ascii' codec can't encode character u'\u211a' in position 
0: ordinal not in range(128)


Best,
Tom

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[issue6717] Some problem with recursion handling

2012-04-12 Thread Philippe Devalkeneer


Changes by Philippe Devalkeneer phil.le.bienheur...@gmail.com:


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[issue13405] Add DTrace probes