IMAP UTF-7, any codec for that anywhere?
Is there any codec available for handling The special UTF-7 codec for IMAP? I have searched the web for info, but there only seem to be discussions about it. Not actual implementations. This is what I am talking about: http://www.faqs.org/rfcs/rfc2060.html 5.1.3. Mailbox International Naming Convention -- hilsen/regards Max M, Denmark http://www.mxm.dk/ IT's Mad Science -- http://mail.python.org/mailman/listinfo/python-list
Re: pre-PEP generic objects
Steven Bethard wrote: Peter Otten wrote: Steven Bethard wrote: def __eq__(self, other): x.__eq__(y) == x == y return (isinstance(other, self.__class__) and self.__dict__ == other.__dict__) This results in an asymmetry: [snip] Whether this is intended, I don't know. If someone can enlighten me... Unintended. Oops, I meant CPython's rich comparison, not your __eq__() implementation. I'll switch to self.__class__ == other.__class__ or type(self) == type(other) Any preference? Normally none of them. The former if hard pressed because all old-style classes have the same type(). But it doesn't really matter here. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 Uninstall Entry in WinXP Registry
Brad Tilley wrote:
Python 2.3 placed a registry key under:
'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Python2.3'
[...]
Python 2.4 does not use this registry entry on the two machines I have
installed it on... any tips on how to locate this?
It's under
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{82D9302E-F209-4805-B548-52087047483A}
which is the product code of Python 2.4. Notice that Python 2.4.1
will use a different product code.
However, if you merely want to avoid that users remove the package,
you can set the ARPNOREMOVE property during installation, e.g.
msiexec /i python24.msi ARPNOREMOVE=1
You might want to set ARPNOMODIFY and ARPNOREPAIR as well.
If you cannot readily pass that property on the command line during
installation, you can use orca.exe (or a python script) to add this
property to the Property table of python24.msi.
If you have W2k or later, you can also set the NoRemove registry
value under the key above, to hide the remove feature after
installation.
HTH,
Martin
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Re: IMAP UTF-7, any codec for that anywhere?
Max M wrote:
Is there any codec available for handling The special UTF-7 codec for IMAP?
I have searched the web for info, but there only seem to be discussions
about it. Not actual implementations.
Is there something special do you need or is recipe OK?
u\u00ff.encode('utf-7')
'+AP8-'
Cheers,
Brian
--
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2.4 or 2.3.4 for 2.3 software?
Can we expect the current release of 2.4 to be just as reliable as 2.3.4 for 2.3 compliant software? Thanks for any help! Jens -- http://mail.python.org/mailman/listinfo/python-list
Re: RELEASED Python 2.4 (final)
Christmas came early this year. Thank you all nice Python developers. -- mvh Björn -- http://mail.python.org/mailman/listinfo/python-list
Re: 2.4 or 2.3.4 for 2.3 software?
On Wed, Dec 01, 2004 at 10:23:55AM +0100, Jens Bloch Helmers wrote: Can we expect the current release of 2.4 to be just as reliable as 2.3.4 for 2.3 compliant software? Only time will tell. I myself had never had any problems with 2.x.0 versions of Python. Only early 2.0.x had a few problems in the C API for me. -- Gerhard signature.asc Description: Digital signature -- http://mail.python.org/mailman/listinfo/python-list
Re: decorators ?
Some more decorator examples. How to create abstract methods using an @absractmethod decorator: http://www.brpreiss.com/books/opus7/html/page117.html Generics, property getters and setters. I don't know what these decorators are supposed to do: http://www.cis.upenn.edu/~edloper/pydecorators.html - And according to this, http://www.prothon.org/pipermail/prothon-user/2004-August/003173.html, one use of decorators is to put a functions docstring before the def f(): line like this: @doc(blabla does something.) def blabla(): Here is one decorator for optimizing: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277940 I think the essence of decorators is that it makes it possible to do in Python what you in other languages do with method qualifiers. This declaration in Java public synchronized static void doStuff() would you write in Python as @public @synchronized @staticmethod def doStuff(): I haven't seen an example of a @synchronized decorator, but I assume it is possible. Hopefully, it is possible to create a @private decorator which throws some kind of exception when a private method is accessed from outside the class. If that is possible, then it would also be nice to have a @public decorator which doesn't do anything. As far as I know, only two decorators are included in the standard library in Python 2.4, @staticmethod and @classmethod. That is a little unfortunate, because many more obvious ones could have been included. The devs are probably planning to correct that in the coming versions. That is all I know about decorators. Or rather THINK I know from reading stuff on the internet. Please don't flame me if I'm wrong. :) -- mvh Björn -- http://mail.python.org/mailman/listinfo/python-list
Re: Question on sorting
Lad wrote:
wes weston [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]...
Lad wrote:
Hi,
I have a file of records of 4 fields each.
Each field is separated by a semicolon. That is
Filed1;Ffield2;Field3;Field4
But there may be also empty records such as
(only semicolons).
For sorting I used
#
lines = file('Config.txt').readlines()# a file I want to sort
lines.sort()
ff=open('ConfigSorted.txt','w')# sorted file
ff.writelines(lines)
ff.close()
###
It was sorted but empty records were first. I need them to be last(at
the end of the file). How can I do that?
Thanks for help
Lad
Lad,
The sort call can have a function name as an arg. You
could do:
def mycompare(s1,s2):
#return -1 to put s1's at front; 1 to put s1's at back; 0 for a tie
#if s1== and s2: return 1
lines.sort(mycompare)
Wes,
Thank you for reply. But I do not understand mycompare function. Can
you please explain to me how it should work? Thanks
compare(a, b) is just a function for comparing two items/lines. I must
return -1 if ab, +1 if ab, and 0 if a==b. For example the following
compare moves the records to the end and keeps the order of others
unaffected:
items = [, ;a;b;;, ;b;a;;, a;b;c;d;e, a;;;d;e]
def compare(a, b):
... return cmp(a == , b == ) or cmp(a, b)
...
items.sort(compare)
items
[';a;b;;', ';b;a;;', 'a;;;d;e', 'a;b;c;d;e', '']
As Eddie Corns pointed out, you left some doubt whether that is really what
you want. Here is a more complex compare() that handles the lines as
columns split by ; and puts empty columns last in the sorting order:
def key(row):
... return [(not col, col) for col in row.split(;)]
...
def compare(a, b):
... return cmp(key(a), key(b))
...
items.sort(compare)
items
['a;b;c;d;e', 'a;;;d;e', ';a;b;;', ';b;a;;', '']
If you are on Python 2.4, you don't need the compare() detour and can use
key() directly:
items.sort(key=key)
items
['a;b;c;d;e', 'a;;;d;e', ';a;b;;', ';b;a;;', '']
Finally, the lines don't seem to carry any information - why not
filter them out completely?
items = [line[:-1] for line in file(cfg.txt, U) if line != \n]
Peter
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Regular Expression Problem...
Hello NG, I am quite new with Python... I'm writing an application that does also some regexp things on strings, but I'm having problem about identifying/extracting a substring from another string. What I have to do is to extract all the strings that begins with a $ character, but excluding characters like . (point) and ' (single quote) and \ / (slashes). For example I have: 1) This Is An $EXAMPLE String 2) This Is An $EXAMPLE.String 3) 'This Is An $EXAMPLE' 4) This Is An \$EXAMPLE\String; I would like to extract only the keyword $EXAMPLE and what I'm using at the moment is: #CODE BEGIN import re mystring = This Is An \$EXAMPLE\String; regex = re.compile([\$]+\S*,re.IGNORECASE) keys = regex.findall(mystring) #CODE END Obviously this code returns things like $EXAMPLE', $EXAMPLE/, $EXAMPLE. and so on... Does anyone have a suggestion? Thank you a lot. Andrea. -- Message for the recipient only, if received in error, please notify the sender and read http://www.eni.it/disclaimer/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Regular Expression Problem...
[EMAIL PROTECTED] writes: #CODE BEGIN import re mystring = This Is An \$EXAMPLE\String; regex = re.compile([\$]+\S*,re.IGNORECASE) keys = regex.findall(mystring) #CODE END regex = re.compile([\$]+\w*,re.IGNORECASE) import re mystring = This Is An \$EXAMPLE\String; regex = re.compile([\$]+\w*,re.IGNORECASE) keys = regex.findall(mystring) keys ['$EXAMPLE'] Be seeing you, -- Godoy. [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
RE: Regular Expression Problem...
You could try the following: regex = re.compile([\$]\w+, re.IGNORECASE) I've only done a bit of testing. Maybe somebody has a better solution. Cheers!! Dermot. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: 01 December 2004 12:23 To: [EMAIL PROTECTED] Subject: Regular Expression Problem... Hello NG, I am quite new with Python... I'm writing an application that does also some regexp things on strings, but I'm having problem about identifying/extracting a substring from another string. What I have to do is to extract all the strings that begins with a $ character, but excluding characters like . (point) and ' (single quote) and \ / (slashes). For example I have: 1) This Is An $EXAMPLE String 2) This Is An $EXAMPLE.String 3) 'This Is An $EXAMPLE' 4) This Is An \$EXAMPLE\String; I would like to extract only the keyword $EXAMPLE and what I'm using at the moment is: #CODE BEGIN import re mystring = This Is An \$EXAMPLE\String; regex = re.compile([\$]+\S*,re.IGNORECASE) keys = regex.findall(mystring) #CODE END Obviously this code returns things like $EXAMPLE', $EXAMPLE/, $EXAMPLE. and so on... Does anyone have a suggestion? Thank you a lot. Andrea. -- Message for the recipient only, if received in error, please notify the sender and read http://www.eni.it/disclaimer/ -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Help With Hiring Python Developers
On 2004-12-01, fuego [EMAIL PROTECTED] wrote: My company (http://primedia.com/divisions/businessinformation/) has two job openings that we're having a heckuva time filling. Allow offsite workers and you'll have all the candidates you want. -Bill -- Sattre PressThe King in Yellow http://sattre-press.com/ by Robert W. Chambers [EMAIL PROTECTED] http://sattre-press.com/kiy.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Regular Expression Problem...
[EMAIL PROTECTED] wrote: identifying/extracting a substring from another string. What I have to do is to extract all the strings that begins with a $ character, but excluding characters like . (point) and ' (single quote) and \ / (slashes). For example I have: 1) This Is An $EXAMPLE String 2) This Is An $EXAMPLE.String 3) 'This Is An $EXAMPLE' 4) This Is An \$EXAMPLE\String; I would like to extract only the keyword $EXAMPLE and what I'm using at Is that what you want? import re r = re.compile([$]\w+) r.findall( ... 1) This Is An $EXAMPLE String ... 2) This Is An $EXAMPLE.String ... 3) 'This Is An $EXAMPLE' ... 4) This Is An \$EXAMPLE\String; ... ) ['$EXAMPLE', '$EXAMPLE', '$EXAMPLE', '$EXAMPLE'] Peter -- http://mail.python.org/mailman/listinfo/python-list
RE: 2.4 or 2.3.4 for 2.3 software?
Title: RE: 2.4 or 2.3.4 for 2.3 software? [Jens Bloch Helmers] #- Can we expect the current release of 2.4 to be just as reliable as #- 2.3.4 for 2.3 compliant software? Actually, you can expect to be more reliable, a lot of bugs were fixed. . Facundo -- http://mail.python.org/mailman/listinfo/python-list
Regexp question
I realize this is more a regexp question than a python question, but maybe one of the re object could help me: I have wish to know how to _no_ match: This is but an example of the data I handle: xx xx xx xx xx xx xx [yy yy yy yy yy yy yy] (zz zz zz zz) I currently can retrieve the three group of logical data blocks with: l_str = 'xx xx xx xx xx xx xx [yy yy yy yy yy yy yy] (zz zz zz zz)' p = re.compile(r'([a-f-0-9\s]*) (\[[a-f-0-9\s]*\]) (\([a-f-0-9\s]*\))',re.IGNORECASE) #OK g = p.search(l_str) What I would rather do is. get the data block that is _not_ between brackets or parenthesis i.e; 'xx xx xx xx xx xx xx' knowing that the intial string could be: [yy yy yy yy yy yy yy] xx xx xx xx xx xx xx (zz zz zz zz) Any clue ? Regards, Philippe -- * Philippe C. Martin SnakeCard LLC www.snakecard.com * -- http://mail.python.org/mailman/listinfo/python-list
Re: IMAP UTF-7, any codec for that anywhere?
On Wed, 01 Dec 2004 10:35:59 +0100, Max M [EMAIL PROTECTED] wrote:
Brian Quinlan wrote:
Max M wrote:
Is there any codec available for handling The special UTF-7 codec for
IMAP?
Is there something special do you need or is recipe OK?
u\u00ff.encode('utf-7')
'+AP8-'
A recipe would be excellent. Unfortunately yours is no right. It should
have looke like:
imapUTF7Encode(u\u00ff)
'AP8-'
I believe you missed the 'special' in The special UTF-7 codec for IMAP?
Imap folders use a non-standard version of utf-7, where some characters
are different.
I found som messages from 2001 on the net between a few Python unicode
developers, where they discuss implementing it. But I cannot find an
implementation anywhere.
I found a perl module that converts to/from the codec, but as usual that
is regex hell. Well ok its not that difficult, but I still need to think
to hard to parse Perl regex'
Twisted's IMAP4 support includes an implementation of this codec. Most of
the API also happily accepts unicode objects and encodes them as necessary, too.
http://www.twistedmatrix.com/
Jp
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Re: decorators ?
Jacek Anything you can do with decorators, you could do before (with Jacek the exception of rebinding the __name__ of functions). And while that feature was added because we realized it would be nice if the decorated function could have the same name as the original function, it seems like that change could stand on its own merits. Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: Semaphore or what should I use?
Bastian Hammer wrote:
Hi
I´m wondering why there are so few examples with Semaphore.
Is it obsolete?
I´ve got a Class Data.
It offers 2 Threads methods for updating, editing, .. a private
dictionary.
Now I have to make sure, that both threads are synchronal,
1 thread edits something and the other is blocked until the first
thread is ready.
Isn´t it a good idea to do this with a semaphore?
And if I should use a Semaphore here, could anybody give me an example
how it should look like?
Everything that I test throws errors :(
Thank you :)
Bye, Bastian
Sure, you can use a Semaphore. But it sounds like you are really
wanting an exclusive lock. Semaphore can do that for you - actually
it's the default behavior. You could try using a regular old Lock.
Semaphores are locking counters. You set the counter at initialization
to some number (the default is 1). When you enter into a semaphored
area of code (using the .acquire() method), the counter attempts to
decrement and will do so if it doesn't push it beneath 0. Upon exiting
the area of semaphored code (by calling the .release() method on the
semaphore), the counter is incremented. An example would look like this:
import threading
class locking_writer:
def __init__(self, some_file):
self.sema = threading.Semaphore()
self.f = open(some_file, 'w')
def write(self, content):
self.sema.acquire()
self.f.write(content)
self.sema.release()
and used like this:
In [16]: l = locking_writer('/tmp/foo')
In [17]: l.write('test')
I haven't tested this with multiple threads, so I'll leave that up to
you if you want to use it.
Now, with all that said, the preferred way of synchronizing between
threads is to use a Queue (import Queue\nq = Queue.Queue()). If you
have a file that more than one thread needs to update, you probably want
to create a thread just to update that file and have the threads
responsible for getting information to update it with pass that
information into a queue. You may have reasons for not wanting to do
that, but it's worth looking into and considering.
Jeremy Jones
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Re: Regexp question
Hello Philippe, What I would rather do is. get the data block that is _not_ between brackets or parenthesis i.e; 'xx xx xx xx xx xx xx' knowing that the intial string could be: See http://docs.python.org/lib/re-syntax.html and search for negative lookahead HTH. -- Miki Tebeka [EMAIL PROTECTED] http://tebeka.spymac.net The only difference between children and adults is the price of the toys -- http://mail.python.org/mailman/listinfo/python-list
Re: Struggling with struct.unpack() and p format specifier
Thanks for your response.
I guess the documentation on the p format wasn't clear to me ... or
perhaps I was just hoping to much for an easy solution !
The data is part of a record structure that is written to a file with
a few int's and longs mixed in. The pattern repeats through the
file with sometime up to 2500 repititions.
Clearly I can create a subroutine to read the records and extract out
the fields. I was just hoping I could use the struct module and
create a pattern like 'LLHpHLpppH' which would unpack the date and
automatically give me the strings without needing to first determine
their lengths as the length is already embedded in the data.
Any suggestion on how to go about proposing the ability to read
variable length strings based on the preceeding byte value to the
struct module ? It seems it would be a valuable addition, helping
with code clarity, readability and saving quite a few lines of code -
well atleast me anyways !
Thanks again.
Peter Hansen [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED]...
Geoffrey wrote:
As I mentioned, I can parse the string and read it with multiple
statements, I am just looking for a more efficient solution.
This looks like about the best you can do, using the information
from Tim's reply:
buf = '\0\0\xb9\x02\x13EXCLUDE_CREDIT_CARD'
import struct
x = struct.unpack('xxBB%sp' % (ord(buf[4])+1), buf)
x
(185, 2, 'EXCLUDE_CREDIT_CARD')
If you wanted to avoid hard-coding the 4, you would
be most correct to do this:
header = 'xxBB'
lenIndex = struct.calcsize(header)
x = struct.unpack('%s%dp' % (header, ord(buf[lenIndex])+1), buf)
... though that doesn't exactly make it all that readable.
-Peter
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Re: Semaphore or what should I use?
Bastian == Bastian Hammer [EMAIL PROTECTED] writes: Bastian Now I have to make sure, that both threads are Bastian synchronal, 1 thread edits something and the other is Bastian blocked until the first thread is ready. Bastian Isn´t it a good idea to do this with a semaphore? Semaphore will do, but this is a classical use case for threading.Lock. There should be lots of stuff regarding locks (or more googleably, mutexes) on the net. -- Ville Vainio http://tinyurl.com/2prnb -- http://mail.python.org/mailman/listinfo/python-list
A little threading problem
Hello all,
I need your wisdom again. I'm working on a multi-threaded application
that handles multiple data sources in small batches each time. The idea
is that there are 3 threads that run simultaneously, each read a fixed
number of records, and then they wait for eachother. After that the main
thread does some processing, and the threads are allowed to continue
reading data.
I summarized this part of the application in the attached python script,
which locks up rather early, for reasons that I don't understand (I
don't have a computer science education), and I'm pretty sure the
problem is related to what I'm trying to fix in my application. Can
anybody explain what's happening (Or maybe even show me a better way of
doing this)?
Regards,
Alban Hertroys,
MAG Productions.
import sys
import threading
class AThread(threading.Thread):
def __init__(self, name, mainCond, allowedCond):
self.counter = 0
self.name = name
self.mainCond = mainCond
self.condAllowed = allowedCond
self.waitUntilRunning = threading.Condition()
threading.Thread.__init__(self, None, None, name, [])
def start(self):
threading.Thread.start(self)
# Let the main thread wait until this thread is ready to accept Notify
# events.
self.waitUntilRunning.acquire()
self.waitUntilRunning.wait()
self.waitUntilRunning.release()
def run(self):
threading.Thread.run(self)
# Print numbers 1 - 25
while self.counter 25:
self.condAllowed.acquire()
# Tell the main thread that we're ready to receive Notifies
self.waitUntilRunning.acquire()
self.waitUntilRunning.notify()
print Running
self.waitUntilRunning.release()
# Wait for a Notify from the main thread
print Wait
self.condAllowed.wait()
self.condAllowed.release()
self.counter += 1
print Thread %s: counter = %d % (self.name, self.counter)
# Tell the main thread that a thread has reached the end of the loop
self.mainCond.acquire()
self.mainCond.notify()
self.mainCond.release()
class Main(object):
def __init__(self):
self.condWait = threading.Condition()
self.condAllowed = threading.Condition()
self.threads = [
AThread('A', self.condWait, self.condAllowed),
AThread('B', self.condWait, self.condAllowed),
AThread('C', self.condWait, self.condAllowed),
]
# Start the threads
for thread in self.threads:
thread.start()
while True:
# Allow the threads to run another iteration
self.condAllowed.acquire()
print Notify
self.condAllowed.notifyAll()
self.condAllowed.release()
# Wait until all threads reached the end of their loop
for thread in self.threads:
self.condWait.acquire()
self.condWait.wait()
self.condWait.release()
main = Main()
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Re: pdb with emacs
Yuri Shtil [EMAIL PROTECTED] writes: I am trying to learn python and use the gud/pdb from emacs. The functionality that I am used to under gud/gdb and gud/perldb is missing, or I don't know how to make it work. Specifically: when I start pdb on a script file, the source does not show in an another window as it does with perldb and gdb. The source appears for me if I do C-c C-s immediately after startup. If I bring it up in an another window, the ^X SPC set a break, but the subsequent gud-next commands do not move the execution cursor in the source file window. I can in general set breakpoints using C-x SPC in the source buffer after the source appears, which will be hit after I resume execution. So I guess I don't observe your problems. I am using a custom pdb executable script though, maybe this helps: #!/bin/sh exec python $HOME/opt/python-2.3/lib/python2.3/pdb.py $@ -- Benjamin Rutt -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 Uninstall Entry in WinXP Registry
Martin v. Löwis wrote:
Brad Tilley wrote:
Python 2.3 placed a registry key under:
'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Python2.3'
[...]
Python 2.4 does not use this registry entry on the two machines I have
installed it on... any tips on how to locate this?
It's under
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{82D9302E-F209-4805-B548-52087047483A}
which is the product code of Python 2.4. Notice that Python 2.4.1
will use a different product code.
However, if you merely want to avoid that users remove the package,
you can set the ARPNOREMOVE property during installation, e.g.
msiexec /i python24.msi ARPNOREMOVE=1
You might want to set ARPNOMODIFY and ARPNOREPAIR as well.
If you cannot readily pass that property on the command line during
installation, you can use orca.exe (or a python script) to add this
property to the Property table of python24.msi.
If you have W2k or later, you can also set the NoRemove registry
value under the key above, to hide the remove feature after
installation.
HTH,
Martin
That's very helpful, thanks Martin! How do I set the install path to
c:\Program Files?
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Re: Syntax for extracting multiple items from a dictionary
On Wed, 1 Dec 2004 10:23:28 -0500, Dave Merrill [EMAIL PROTECTED] wrote: anton muhin wrote: Or dict((key, row[key]) for key in cols). I'm on Py 2.3.3, and neither of these appear to work. Can someone confirm? I can't see anything in the 2.4 release notes that point to where this would have changed. They use generator expressions, which were introduced by Python 2.4. See http://www.python.org/dev/doc/devel/whatsnew/node4.html. -- Cheers, Simon B, [EMAIL PROTECTED], http://www.brunningonline.net/simon/blog/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Syntax for extracting multiple items from a dictionary
The correct syntax is:
dict([(key, row[key]) for key in cols])
i.e. the list must be enclosed in [...].
/Jean Brouwers
In article [EMAIL PROTECTED], Dave Merrill
[EMAIL PROTECTED] wrote:
anton muhin wrote:
Stefan Behnel wrote:
shark schrieb:
row = {fname : Frank, lname : Jones, city : Hoboken,
state :
Alaska}
cols = (city, state)
Is there a best-practices way to ask for an object containing only the
keys
named in cols out of row? In other words, to get this:
{city : Hoboken, state : Alaska}
Untested:
dict( (key,value) for (key,value) in row.iteritems() if key in cols )
Works in Py2.4
Stefan
Or dict((key, row[key]) for key in cols).
regards,
anton.
I'm on Py 2.3.3, and neither of these appear to work. Can someone confirm? I
can't see anything in the 2.4 release notes that point to where this would
have changed.
Thanks,
shark
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Re: SOAPpy/ZSI/Twisted SOAP over stdin/stdout?
Harry George [EMAIL PROTECTED] writes: Normally the SOAP Servers are designed to take control of a port and run their own sockets via inheritance from SocktServer. But under inetd and xinetd, the port is controlled elsewhere and the service just gets the stdin/stdout. I need to configure (or tweak) one of the SOAP servers to use that connection. Has anyone done this with any of the above named SOAP servers? Recommmendations or hints if I try it myself? First, thanks for the hints - I definitely want to investigate Twisted basic. Second, I've solved it by doing an xinetd redirect. Do external control on one port, then pass the data to an internal-only port which is watched by the SOAP server. -- [EMAIL PROTECTED] 6-6M21 BCA CompArch Design Engineering Phone: (425) 294-4718 -- http://mail.python.org/mailman/listinfo/python-list
Re: RELEASED Python 2.4 (final)
Anthony Baxter schrieb: happy to announce the release of Python 2.4. Thanks! minor remarks: First line from C:\Python24\README.txt This is Python version 2.4 alpha 3 In C:\Python24\Tools in various subdirs the README.TXT files disappeared. -- regards kgm -- http://mail.python.org/mailman/listinfo/python-list
Re: Question on sorting
Peter Otten [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED]...
Lad wrote:
wes weston [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]...
Lad wrote:
Hi,
I have a file of records of 4 fields each.
Each field is separated by a semicolon. That is
Filed1;Ffield2;Field3;Field4
But there may be also empty records such as
(only semicolons).
For sorting I used
#
lines = file('Config.txt').readlines()# a file I want to sort
lines.sort()
ff=open('ConfigSorted.txt','w')# sorted file
ff.writelines(lines)
ff.close()
###
It was sorted but empty records were first. I need them to be last(at
the end of the file). How can I do that?
Thanks for help
Lad
Lad,
The sort call can have a function name as an arg. You
could do:
def mycompare(s1,s2):
#return -1 to put s1's at front; 1 to put s1's at back; 0 for a tie
#if s1== and s2: return 1
lines.sort(mycompare)
Wes,
Thank you for reply. But I do not understand mycompare function. Can
you please explain to me how it should work? Thanks
compare(a, b) is just a function for comparing two items/lines. I must
return -1 if ab, +1 if ab, and 0 if a==b. For example the following
compare moves the records to the end and keeps the order of others
unaffected:
items = [, ;a;b;;, ;b;a;;, a;b;c;d;e, a;;;d;e]
def compare(a, b):
... return cmp(a == , b == ) or cmp(a, b)
...
items.sort(compare)
items
[';a;b;;', ';b;a;;', 'a;;;d;e', 'a;b;c;d;e', '']
Petr,
thank you for help and explanation.
It works
Lad
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Re: Python 2.4 Uninstall Entry in WinXP Registry
Brad Tilley wrote:
Martin v. Löwis wrote:
Brad Tilley wrote:
Python 2.3 placed a registry key under:
'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Python2.3'
[...]
Python 2.4 does not use this registry entry on the two machines I
have installed it on... any tips on how to locate this?
It's under
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{82D9302E-F209-4805-B548-52087047483A}
which is the product code of Python 2.4. Notice that Python 2.4.1
will use a different product code.
However, if you merely want to avoid that users remove the package,
you can set the ARPNOREMOVE property during installation, e.g.
msiexec /i python24.msi ARPNOREMOVE=1
You might want to set ARPNOMODIFY and ARPNOREPAIR as well.
If you cannot readily pass that property on the command line during
installation, you can use orca.exe (or a python script) to add this
property to the Property table of python24.msi.
If you have W2k or later, you can also set the NoRemove registry
value under the key above, to hide the remove feature after
installation.
HTH,
Martin
That's very helpful, thanks Martin! How do I set the install path to
c:\Program Files?
I found the documentation here:
http://python.fyxm.net/2.4/msi.html
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assymetry between a == b and a.__eq__(b) (WAS: pre-PEP generic objects)
Peter Otten wrote: Steven Bethard wrote: def __eq__(self, other): x.__eq__(y) == x == y return (isinstance(other, self.__class__) and self.__dict__ == other.__dict__) This results in an asymmetry: from bunch import Bunch class B(Bunch): pass ... B().__eq__(Bunch()) False Bunch().__eq__(B()) True With indirect use of __eq__() this puzzling behaviour disappears: B() == Bunch() False Bunch() == B() False Whether this is intended, I don't know. If someone can enlighten me... It does look like it's at least documented: http://docs.python.org/ref/comparisons.html The operators , , ==, =, =, and != compare the values of two objects. The objects need not have the same type. If both are numbers, they are converted to a common type. Otherwise, objects of different types always compare unequal, and are ordered consistently but arbitrarily. This sounds like using == makes a guarantee that objects of different types will compare unequal, while my __eq__ method (using isinstance) did not make this guarantee. I tried to check the C code to verify this (that different classes are guaranteed to be unequal) but rich comparisons make that code pretty complicated. Steve -- http://mail.python.org/mailman/listinfo/python-list
Drawing Cogwheels and Combinatoric diagrams
Gentlemen, I'm looking for a graphing or drawing python package that will allow me to draw complex geometric shapes. I need to be able to create shapes like cogwheels and Venn diagrams: http://encyclopedia.thefreedictionary.com/Venn The library must support alpha blending and the ability to return x,y co-ordinates for a shape, as I want to draw an imagemap on top of parts of the shape. Can PIL do this, or do I need to go the way of GnuPlot or Gri? Can anyone give me an example of a complex shape drawn like this? Many thanks, Andrew -- http://mail.python.org/mailman/listinfo/python-list
Re: Regexp question
On Wed, 1 Dec 2004 07:48:24 -0600, Philippe C. Martin
[EMAIL PROTECTED] wrote:
I realize this is more a regexp question than a python question, but
maybe one
of the re object could help me:
I have wish to know how to _no_ match:
This is but an example of the data I handle:
xx xx xx xx xx xx xx [yy yy yy yy yy yy yy] (zz zz zz zz)
I currently can retrieve the three group of logical data blocks with:
l_str = 'xx xx xx xx xx xx xx [yy yy yy yy yy yy yy] (zz zz zz zz)'
p = re.compile(r'([a-f-0-9\s]*) (\[[a-f-0-9\s]*\])
(\([a-f-0-9\s]*\))',re.IGNORECASE) #OK
g = p.search(l_str)
What I would rather do is.
get the data block that is _not_ between brackets or parenthesis i.e;
'xx xx
xx xx xx xx xx' knowing that the intial string could be:
[yy yy yy yy yy yy yy] xx xx xx xx xx xx xx (zz zz zz zz)
Any clue ?
regexps seem an overkill for the task at hand.
If data is really as simple as you suggest, you can try the following:
s = 'xx [y y] (z z)'
s = s[:s.index('(')] + s[s.index(')')+1:]
s
'xx [y y] '
s = s[:s.index('[')] + s[s.index(']')+1:]
s
'xx '
s.strip()
'xx'
Relevant lines:
s = s[:s.index('(')] + s[s.index(')'):]
s = s[:s.index('[')] + s[s.index(']')+1:]
s = s.strip()
--
Mitja
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Converting String to Class
Hello, I have a script that is called by the shell this way : mqtrigger.py TMC2TEST.QUEUE LV1871.MQPROCESS So argv[1] is the string TMC2TEST.QUEUE LV1871.MQPROCESS I would like to construct a class with that string that contains the attributes -StrucId -VersionId -QName -ProcessName I am thinking about using the following info opts = [['StrucId', CMQC.MQTMC_STRUC_ID, '4s'], ['Version', CMQC.MQTMC_VERSION_2, '4s'], ['QName', '', '48s'], ## or less :-) ['ProcessName', '', '48s']] ## or less :-) 1. is the attributename 2. is the default 3. is the format in the string So the string could be parsed with the opts Info and the attributes could be inserted into the class. I dont even have a starting point how to do that. Could somebody point my into the right direction Regards Michael -- http://mail.python.org/mailman/listinfo/python-list
Re: A little threading problem
Alban Hertroys wrote:
Hello
all,
I need your wisdom again. I'm working on a multi-threaded application
that handles multiple data sources in small batches each time. The idea
is that there are 3 threads that run simultaneously, each read a fixed
number of records, and then they wait for eachother. After that the
main thread does some processing, and the threads are allowed to
continue reading data.
I summarized this part of the application in the attached python
script, which locks up rather early, for reasons that I don't
understand (I don't have a computer science education), and I'm pretty
sure the problem is related to what I'm trying to fix in my
application. Can anybody explain what's happening (Or maybe even show
me a better way of doing this)?
Regards,
Alban Hertroys,
MAG Productions.
import sys
import threading
class AThread(threading.Thread):
def __init__(self, name, mainCond, allowedCond):
self.counter = 0
self.name = name
self.mainCond = mainCond
self.condAllowed = allowedCond
self.waitUntilRunning = threading.Condition()
threading.Thread.__init__(self, None, None, name, [])
def start(self):
threading.Thread.start(self)
# Let the main thread wait until this thread is ready to accept Notify
# events.
self.waitUntilRunning.acquire()
self.waitUntilRunning.wait()
self.waitUntilRunning.release()
def run(self):
threading.Thread.run(self)
# Print numbers 1 - 25
while self.counter 25:
self.condAllowed.acquire()
# Tell the main thread that we're ready to receive Notifies
self.waitUntilRunning.acquire()
self.waitUntilRunning.notify()
print "Running"
self.waitUntilRunning.release()
# Wait for a Notify from the main thread
print "Wait"
self.condAllowed.wait()
self.condAllowed.release()
self.counter += 1
print "Thread %s: counter = %d" % (self.name, self.counter)
# Tell the main thread that a thread has reached the end of the loop
self.mainCond.acquire()
self.mainCond.notify()
self.mainCond.release()
class Main(object):
def __init__(self):
self.condWait = threading.Condition()
self.condAllowed = threading.Condition()
self.threads = [
AThread('A', self.condWait, self.condAllowed),
AThread('B', self.condWait, self.condAllowed),
AThread('C', self.condWait, self.condAllowed),
]
# Start the threads
for thread in self.threads:
thread.start()
while True:
# Allow the threads to run another iteration
self.condAllowed.acquire()
print "Notify"
self.condAllowed.notifyAll()
self.condAllowed.release()
# Wait until all threads reached the end of their loop
for thread in self.threads:
self.condWait.acquire()
self.condWait.wait()
self.condWait.release()
main = Main()
You've got a deadlock. I modified your script to add a print "T-%s" %
self.name before an acquire and after a release in the threads you spun
off (not in the main thread). Here is the output:
[EMAIL PROTECTED] threading]$ python tt.py
T-A: acquiring condAllowed
T-A: acquiring waitUntilRunning
T-A: Running
T-A: released waitUntilRunning
T-A: Wait
T-B: acquiring condAllowed
T-B: acquiring waitUntilRunning
T-B: Running
T-B: released waitUntilRunning
T-B: Wait
T-C: acquiring condAllowed
T-C: acquiring waitUntilRunning
T-C: Running
T-C: released waitUntilRunning
T-C: Wait
Notify
T-A: released condAllowed
T-A: counter = 1
T-A: acquiring mainCond
T-A: released mainCond
T-A: acquiring condAllowed
T-A: acquiring waitUntilRunning
T-A: Running
T-A: released waitUntilRunning
T-A: Wait
T-C: released condAllowed
T-C: counter = 1
T-C: acquiring mainCond
T-C: released mainCond
T-C: acquiring condAllowed
T-C: acquiring waitUntilRunning
T-C: Running
T-C: released waitUntilRunning
T-C: Wait
T-B: released condAllowed
T-B: counter = 1
T-B: acquiring mainCond
T-B: released mainCond
T-B: acquiring condAllowed
Notify -Here is
your problem
T-A: released condAllowed
T-A: counter = 2
T-A: acquiring mainCond
T-A: released mainCond
T-A: acquiring condAllowed
T-A: acquiring waitUntilRunning
T-A: Running
T-A: released waitUntilRunning
T-A: Wait
T-B: acquiring waitUntilRunning
T-B: Running
T-B: released waitUntilRunning
T-B: Wait
T-C: released condAllowed
T-C: counter = 2
T-C: acquiring mainCond
T-C: released mainCond
T-C: acquiring condAllowed
T-C: acquiring waitUntilRunning
T-C: Running
T-C: released waitUntilRunning
T-C: Wait
Notify is called before thread B (in this case) hits the
condAllowed.wait() piece of code. So, it sits at that wait() for
forever (because it doesn't get notified, because the notification
already happened), waiting to be notified from the main thread, and the
main thread is waiting on thread B (again, in this case) to call
mainCond.notify(). This approach is a deadlock just wanting to happen
(not waiting, because it already did happen). What is it exactly that
you are trying to accomplish? I'm sure there is a better approach.
Jeremy Jones
--
Re: Syntax for extracting multiple items from a dictionary
Dave Merrill wrote:
anton muhin wrote:
Or dict((key, row[key]) for key in cols).
I'm on Py 2.3.3, and neither of these appear to work.
You're probably getting the error shown. Try the change in
the line following it instead.
Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)]
row = {'fname': 'Frank', 'lname': 'Jones', 'city': 'Hoboken',
'state': 'Alaska'}
cols = ['city', 'state']
dict((key, row[key]) for key in cols)
File stdin, line 1
dict((key, row[key]) for key in cols)
^
SyntaxError: invalid syntax
dict([(key, row[key]) for key in cols])
{'city': 'Hoboken', 'state': 'Alaska'}
I can't see anything in the 2.4 release notes that point to where this would
have changed.
See http://www.python.org/2.4/highlights.html and search for
generator expressions.
-Peter
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Python xmlrpc servers?
I have a project for which being able to write xmlrpc server code in python would be vastly preferable to the second choice solution for a number of reasons. Unfortunately, pretty much everything I see on the net in the way of documentation appears either insufficient or outdated. The example given in the Python documentation for SimpleXMLRPCServer is more or less incomprehensible. That example is as follows: class MyFuncs: def div(self, x, y) : return div(x,y) handler = CGIXMLRPCRequestHandler() handler.register_function(pow) handler.register_function(lambda x,y: x+y, 'add') handler.register_introspection_functions() handler.register_instance(MyFuncs()) handler.handle_request() I don't see where the div(x,y) which is returned in the class function definition comes from. I don't see any relationship between the class MyFuncs and the rest of the program. I don't see where the returned function pow comes from or what its relevance is. I don't see what lambda is or how a lambda function is supposed to be construed as adding two numbers together. I don't see how this server is supposed to be used. I also find an example written by Dave Warner: http://www.onlamp.com/pub/a/python/2001/01/17/xmlrpcserver.html which is about four years old and dated. In particular, the include file xmlrpcserver which he imports no longer exists. And then, I find one example in an IBM reference which actually does work as stated on a single computer: http://www-106.ibm.com/developerworks/webservices/library/ws-pyth10.html The test client provided looks like: mport xmlrpclib server = xmlrpclib.ServerProxy(http://localhost:;) month = server.getMonth(2002, 8) print month which actually works. Nonetheless I need this thing to work across machines. I have a primitive network here usingVerizon DMS and a Linksys router which sees the three computers on it as 192.168.1.100, 192.168.1.101, and 192.168.1.102 as usual. Question is, what does it take to run the server on 102 and a client on 100? Changing the obvious line in the client program to: server = xmlrpclib.ServerProxy(http://192.168.1.102:;) doesn't work. Aside from that, I'd like to get the CGI version of the thing which uses .py files in the CGI bin to work as well and again the only example I see of that (in the Python documentation) is undecipherable. I'd appreciate any suggestions or info anybody might have. -- http://mail.python.org/mailman/listinfo/python-list
Re: Help With Hiring Python Developers
fuego [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] My company (http://primedia.com/divisions/businessinformation/) has two job openings that we're having a heckuva time filling. We've posted at Monster, Dice, jobs.perl.org and python.jobmart.com. Can anyone advise other job boards that might be helpful? Also, feel free .. Thanks in advance! Hm, you're looking for *Manhattan locals* who are required to have Perl skills (i.e. magically working, hardly readable line noise :D ) but optionally they may have Python skills, too (i.e. magically working, easily readable pseudo code :D ) How about adding the additional requirement of COBOL and that the applicant must live in a particular street? :-) Miklós -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 and Python Regrets
[EMAIL PROTECTED] wrote: I just came across the slides for Guido van Rossum's Python Regrets talk, given in 2002. It worries me that much of my Python code would be broken if all of his ideas were implemented. He doesn't even like 'print'. Of course, I am not qualified to argue with Van Rossum about the direction of Python. When is Python 3000 expected to appear? Is there a list of expected incompatibilities with Python 2.3? Are serious Python programmers already taking care to avoid using Python features that may disappear in Python 3000? Python 3000 is kind of imaginary. It's a what-if: what if Guido could do whatever he wanted without worrying about backward compatibility? At one point Python 3000 and Python 3.0 were kind of the same thing (or the same plan -- neither are implemented or even thoroughly planned). Now they are separate ideas -- if you see references to Python 3.0, it also includes some backward incompatible changes and cleanup, like maybe input() will disappear, and integer division will go away, and things like range() will return iterators (and xrange goes away). But it's much more conservative, and presented as a more realistic plan. print will still be around. -- Ian Bicking / [EMAIL PROTECTED] / http://blog.ianbicking.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Python xmlrpc servers?
ted The example given in the Python documentation for ted SimpleXMLRPCServer is more or less incomprehensible. Agreed, there is a doc fix needed. Try mentally adding from math import * to the start of the example. That will get you the pow function. It's still incorrect though. There's no div function, either builtin or in the math module. The MyFuncs class should be defined as in the 2.4 docs: class MyFuncs: def div(self, x, y) : return x // y ted I don't see any relationship between the class MyFuncs and the rest ted of the program. In this simpleminded example, there is none. The goal of the example is to show how the register_* methods are used. In a real-life application any instances registered would probably store considerable parts of the application state or be able to communicate with those objects that do. ted I don't see what lambda is or how a lambda function is supposed ted to be construed as adding two numbers together. Lambda is a keyword in Python used to create and return very simple (single-expression) functions. Lambda expressions can be used anywhere you'd normally use a function object. See: http://www.python.org/doc/current/ref/lambdas.html The line containing the lambda expression: server.register_function(lambda x,y: x+y, 'add') could be recast as: def add(x, y): return x+y server.register_function(add, 'add') though the second arg isn't required since it matches the function's __name__ attribute. It's required when a lambda expression is used though because lambda expressions don't have terribly useful __name__ attributes: f = lambda x,y: x+y f function lambda at 0x65c970 f.__name__ 'lambda' def add(x,y): ... return x+y ... add.__name__ 'add' ted And then, I find one example in an IBM reference which actually ted does work as stated on a single computer: ... ted which actually works. Nonetheless I need this thing to work across ted machines. The server listens to localhost on port . To allow it to listen for external connections change localhost to the name or IP address of the server. Before you do that make sure you understand the ramifications of exposing your XML-RPC server to a broader class of potential clients, some of which are bound to be malicious. Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 and Python Regrets
[EMAIL PROTECTED] I just came across the slides for Guido van Rossum's Python Regrets talk, given in 2002. It worries me that much of my Python code would be broken if all of his ideas were implemented. Actually, none of it would break, provided you don't change the Python implementation you use. He doesn't even like 'print'. Of course, I am not qualified to argue with Van Rossum about the direction of Python. When is Python 3000 expected to appear? This is usually expressed an as a positive offset from the time hell freezes over, but people vary in their estimation of both parts. At a minimum, it requires that Guido first get a job where he can concentrate on Python development. That will happen when hell freezes over, but may happen before then. Hard to say. Is there a list of expected incompatibilities with Python 2.3? No. Are serious Python programmers already taking care to avoid using Python features that may disappear in Python 3000? No, although some naturally avoid dubious features without being threatened wink. -- http://mail.python.org/mailman/listinfo/python-list
non blocking read()
Hi, I use select() to wait for a file object (stdin) to become readable. In that situation I wanted to read everything available from stdin and return to the select statement to wait for more. However, the file object's read method blocks if the number of bytes is 0 or negative. Is there no way to read everything a channel's got currently got without blocking? Uwe -- http://mail.python.org/mailman/listinfo/python-list
Re: module imports and memory usage
On Tue, 30 Nov 2004 16:46:43 -0500, Brad Tilley [EMAIL PROTECTED] wrote: I discovered that when I wrap my code up in a function def and call it that it uses around 4.6 MB of RAM all the time... even while sleeping. However, when I don't put it in a function def it uses around 2.6MB of data when it executes and only 100KB while sleeping. Why is this? Totally unchecked, popped up from somewhere between my ears. Is it possible that (in some situations) the function object keeps a reference to its locals() somewhere, in such a way that it never gets collected? Just wondering... -- Carlos Ribeiro Consultoria em Projetos blog: http://rascunhosrotos.blogspot.com blog: http://pythonnotes.blogspot.com mail: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Python xmlrpc servers?
Skip Montanaro wrote: ted I don't see what lambda is or how a lambda function is supposed ted to be construed as adding two numbers together. Lambda is a keyword in Python used to create and return very simple (single-expression) functions. Lambda expressions can be used anywhere you'd normally use a function object. See: http://www.python.org/doc/current/ref/lambdas.html The line containing the lambda expression: server.register_function(lambda x,y: x+y, 'add') could be recast as: def add(x, y): return x+y server.register_function(add, 'add') That's a whole lot easier to digest. I'd have assumed lambda was some sort of stat function... The server listens to localhost on port . To allow it to listen for external connections change localhost to the name or IP address of the server. Before you do that make sure you understand the ramifications of exposing your XML-RPC server to a broader class of potential clients, some of which are bound to be malicious. Skip Many thanks, that's the part I was missing in the case of standalone servers. The only other real question is what about the cgi servers? I'd assume I'd take the example given: class MyFuncs: def div(self, x, y) : return div(x,y) handler = CGIXMLRPCRequestHandler() handler.register_function(pow) handler.register_function(lambda x,y: x+y, 'add') handler.register_introspection_functions() handler.register_instance(MyFuncs()) handler.handle_request() Stuff that into a file in the cgi-bin dir on the server, and then try to use something like: server = xmlrpclib.Server(http://192.168.1.102/testserver.py;) or server = xmlrpclib.Server(http://192.168.1.102/cgi-bin/testserver.py;) That still hasn't worked, so far at least. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python xmlrpc servers?
ted Would several web services on the same server listen on different ted ports (, 8889, 8890...) or on the same port? Port numbers are never implicit. You need to provide a listen port each time you start the server. Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: Python xmlrpc servers?
ted The only other real question is what about the cgi servers? I'd ted assume I'd take the example given: ted class MyFuncs: ted def div(self, x, y) : return div(x,y) ted handler = CGIXMLRPCRequestHandler() ted handler.register_function(pow) ted handler.register_function(lambda x,y: x+y, 'add') ted handler.register_introspection_functions() ted handler.register_instance(MyFuncs()) ted handler.handle_request() ted Stuff that into a file in the cgi-bin dir on the server, and then ted try to use something like: ted server = xmlrpclib.Server(http://192.168.1.102/testserver.py;) ted or ted server = xmlrpclib.Server(http://192.168.1.102/cgi-bin/testserver.py;) ted That still hasn't worked, so far at least. I've never used XML-RPC in a CGI context before. Have you looked in your web server's error log file? Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: pickle and py2exe
Im trying to compile a script with py2exe. The pickle module is causing the
program to give an error.
Traceback (most recent call last):
File SETIstat.pyw, line 330, in ?
File SETIstat.pyw, line 84, in start_up
File SETIstat.pyw, line 79, in config_load
File pickle.pyc, line 1390, in load
File pickle.pyc, line 872, in load
File pickle.pyc, line 985, in load_string
LookupError: unknown encoding: string-escape
the data in the pickled file is a dictionary containing a couple strings. The
strings do contain \n and \t charaters but no other special characters or
anything.
Does anyone have any suggestions to what I can try to get around this? The
pickle module works fine when the .pyw file is run. Its only when I compile
this is there an issue.
Thanks for any help,
Justin
Have you included string-escape encoding in your setup.py?
My guess is that you can fix the problem with something similar to:
from distutils.core import setup
import py2exe
opts = { py2exe: { packages: [encodings], } }
setup(windows= [spam.py], options= opts)
in your setup.py.
Hope it helps
/Johan Lindberg
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Python Win32 Silent Install
Looks like the installer for the Win32 extensions has changed from Wise to distutils, so now my automated silent installations don't work anymore. Anyone know if the distutils binary installer can be run silently?I haven't been able find a command line reference for distutils binaries (I'm still sifting through http://www.python.org/doc/current/dist/, though...). Maybe there is a better way to do an unattended install of the Win32 extensions (that is, perhaps without using the binary)? Anyway, I'm looking into this on the python.org and starship pages, but I just thought I'd see if anyone can point me in the right direction... - Matt -- http://mail.python.org/mailman/listinfo/python-list
Re: Python xmlrpc servers?
Mark Pilgrim wrote a really neat piece of python code that did XML-RPC over CGI. It seems to have disappeared from his website, though (http://diveintomark.org/public/webservices.txt). If you can't dig it up, I have a working copy that I use. I'll post it / email it if you want. jw On Wed, 1 Dec 2004 13:26:21 -0600, Skip Montanaro [EMAIL PROTECTED] wrote: ted The only other real question is what about the cgi servers? I'd ted assume I'd take the example given: ted class MyFuncs: ted def div(self, x, y) : return div(x,y) ted handler = CGIXMLRPCRequestHandler() ted handler.register_function(pow) ted handler.register_function(lambda x,y: x+y, 'add') ted handler.register_introspection_functions() ted handler.register_instance(MyFuncs()) ted handler.handle_request() ted Stuff that into a file in the cgi-bin dir on the server, and then ted try to use something like: ted server = xmlrpclib.Server(http://192.168.1.102/testserver.py;) ted or ted server = xmlrpclib.Server(http://192.168.1.102/cgi-bin/testserver.py;) ted That still hasn't worked, so far at least. I've never used XML-RPC in a CGI context before. Have you looked in your web server's error log file? Skip -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 and Python Regrets
Anyway, what's to worry about?When the time comes just whip out a little script that converts Python 1.6 (or whatever you like) to Python3K; it will only take seven lines of P3K code. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Win32 Silent Install
Matt Gerrans [EMAIL PROTECTED] writes: Looks like the installer for the Win32 extensions has changed from Wise to distutils, so now my automated silent installations don't work anymore. Anyone know if the distutils binary installer can be run silently?I haven't been able find a command line reference for distutils binaries (I'm still sifting through http://www.python.org/doc/current/dist/, though...). There are no command line options for the distutils created installer, and silent installation is not possible. Maybe there is a better way to do an unattended install of the Win32 extensions (that is, perhaps without using the binary)? I should be quite easy to write a Python script that opens the binary as a zipfile, and then does what the gui does without showing a gui. Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: Python xmlrpc servers?
Check these out - http://server3.sleekcom.com/~jaime/webservice.html (syntax highlighted version) http://server3.sleekcom.com/~jaime/webservice.txt (savable text version) HTH, jw On Wed, 01 Dec 2004 20:04:46 GMT, ted holden [EMAIL PROTECTED] wrote: Jaime Wyant wrote: Mark Pilgrim wrote a really neat piece of python code that did XML-RPC over CGI. It seems to have disappeared from his website, though (http://diveintomark.org/public/webservices.txt). If you can't dig it up, I have a working copy that I use. I'll post it / email it if you want. Thanks, couldn't hurt anything to post it. Again the real problem seems to be the cnostant state of flux of open software and the attempts to have machines and software write documentation don't really seem to help much. Ted -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 and Python Regrets
Matt Gerrans wrote: Anyway, what's to worry about?When the time comes just whip out a little script that converts Python 1.6 (or whatever you like) to Python3K; it will only take seven lines of P3K code. How about 'import classic' -- http://mail.python.org/mailman/listinfo/python-list
Re: Python xmlrpc servers?
Skip Montanaro wrote: If so, you need to qualify the reference to the handler class like SimpleXMLRPCServer.CGIXMLRPCRequestHandler Again thanks, that works. If I weren't worried about jinxing myself I'd say I seem to be in pretty good shape at this point... Ted -- http://mail.python.org/mailman/listinfo/python-list
Re: non blocking read()
In article [EMAIL PROTECTED], Uwe Mayer [EMAIL PROTECTED] wrote: Hi, I use select() to wait for a file object (stdin) to become readable. In that situation I wanted to read everything available from stdin and return to the select statement to wait for more. However, the file object's read method blocks if the number of bytes is 0 or negative. Is there no way to read everything a channel's got currently got without blocking? Yes, there is a way - os.read() (also known as posix.read()) It's better not to mix buffered I/O (like file object I/O functions) with select() at all, because select() actually applies to system level file descriptors and doesn't know anything about the buffer. Get the file descriptor with fileno(), and never refer to the file object again after that. Donn Cave, [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: recombination variations
David Siedband wrote:
The problem I'm solving is to take a sequence like 'ATSGS' and make all
the DNA sequences it represents. The A, T, and G are fine but the S
represents C or G. I want to take this input:
[ [ 'A' ] , [ 'T' ] , [ 'C' , 'G' ], [ 'G' ] , [ 'C' , 'G' ] ]
and make the list:
[ 'ATCGC' , 'ATCGG' , 'ATGGC' , 'ATGGG' ]
[...]
The code you provide only addresses the first part of your problem, and so
does mine:
def disambiguate(seq, alphabet):
... return [list(alphabet.get(c, c)) for c in seq]
...
alphabet = {
... W: AT,
... S: CG
... }
disambiguate(ATSGS, alphabet)
[['A'], ['T'], ['C', 'G'], ['G'], ['C', 'G']]
Note that identity entries (e. g. mapping A to A) in the alphabet
dictionary are no longer necessary. The list() call in disambiguate() is
most likely superfluous, but I put it in to meet your spec accurately.
Now on to the next step :-)
Peter
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Re: Python Win32 Silent Install
Matt Gerrans wrote: Maybe there is a better way to do an unattended install of the Win32 extensions (that is, perhaps without using the binary)? You could use the ActivePython MSI package, which includes the PyWin32 extensions and offers a silent install option: http://aspn.activestate.com/ASPN/docs/ActivePython/2.4/installnotes.html#install_silent Cheers, Trent -- Trent Mick [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: assymetry between a == b and a.__eq__(b) (WAS: pre-PEP genericobjects)
Steven Bethard [EMAIL PROTECTED] wrote in message def __eq__(self, other): x.__eq__(y) == x == y return (isinstance(other, self.__class__) Since an instance of a subclass is an instance of a parent class, but not vice versa, I believe you introduce here the assymetry you verify below. and self.__dict__ == other.__dict__) This results in an asymmetry: from bunch import Bunch class B(Bunch): pass ... B().__eq__(Bunch()) False Bunch().__eq__(B()) True Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
PIL for Python 2.4 ?
Hi ! I can't install PIL on Python 2.4 ; the soft search Python 2.3 ; gh ! Do you know if the great F.L. want to make, soon, a P24 version ? Thanks ! -- Michel Claveau -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 Uninstall Entry in WinXP Registry
Brad Tilley wrote: I found the documentation here: http://python.fyxm.net/2.4/msi.html The original, of course, is at http://python.org/2.4/msi.html Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 Uninstall Entry in WinXP Registry
Martin v. Löwis wrote: Brad Tilley wrote: I found the documentation here: http://python.fyxm.net/2.4/msi.html The original, of course, is at http://python.org/2.4/msi.html Regards, Martin Thanks Martin... going to a .msi was a great move... we can do fully automated, unattended installs now. I appreaciate your work. P.S. Here's what my batch install file currently looks like: msiexec /i python-2.4.msi /qb! ALLUSERS=1 ARPNOREMOVE=1 ARPNOMODIFY=1 ARPNOREPAIR=1 ADDLOCAL=ALL TARGETDIR=C:\Program Files\Python24 -- http://mail.python.org/mailman/listinfo/python-list
Time zones
Hi, I want to ensure that all my time calculations are done in UTC. This is easy with Python on UNIX machines. I simply set the TZ environment variable to UTC, and it ensures that the time functions use UTC. My question is, how do I get similar functionality using Python on Windows? Thanks, Tim. -- http://mail.python.org/mailman/listinfo/python-list
Re: non blocking read()
On 01 Dec 2004 15:55:18 -0500, David Bolen [EMAIL PROTECTED] wrote: Jp Calderone [EMAIL PROTECTED] writes: def nonBlockingReadAll(fileObj): bytes = [] while True: b = fileObj.read(1024) bytes.append(b) if len(b) 1024: break return ''.join(bytes) Wouldn't this still block if the input just happened to end at a multiple of the read size (1024)? Only if the file has not been put into non-blocking mode. But the function as given is wrong, I left out the exception handling in the case you mention. Rather than blocking forever, fileObj.read(1024) will raise IOError (EAGAIN) if the input happened to be a multiple of 1024 bytes long. Here is the corrected version: def nonBlockingReadAll(fileObj): bytes = [] while True: try: b = fileObj.read(1024) except IOError, e: if e.args[0] == errno.EAGAIN: break raise bytes.append(b) if len(b) 1024: break return ''.join(bytes) Arguably, there is no longer any point to checking the length of b in this version, since at worst you will break on the next iteration of the loop. It doesn't hurt, though. Jp -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 and Python Regrets
Brad Tilley wrote: Matt Gerrans wrote: Anyway, what's to worry about?When the time comes just whip out a little script that converts Python 1.6 (or whatever you like) to Python3K; it will only take seven lines of P3K code. How about 'import classic' from past import python23 :-) -- Gustavo Córdova Avila [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] *Tel:* +52 (81) 8130-1919 ext. 127 Integraciones del Norte, S.A. de C.V. Padua #6047, Colonia Satélite Acueducto Monterrey, Nuevo León, México. -- http://mail.python.org/mailman/listinfo/python-list
Re: String operations
Anoop Rajendra wrote:
Hi. I'm trying to resolve an issue with strings.
The command(inclusive of the back-slashes)
condor_q -l -constraint ProjectId==\anoopr_samadams.fnal.gov_161903_30209\
is the only way the command returns the right result.
I'm trying to run this command from inside a python program.
The way I can get it work is by:
os.system('condor_q -l -constraint
ProjectId==\\\anoopr_samadams.fnal.gov_161903_30209\\\')
But, I'd rather use the os.exec functions to get the output. But
os.execvp(condor_q,[condor_q,-l,-constraint,'ProjectId==\\\anoopr_samadams.fnal.gov_161903_30209\\\'])
doesnt work. Its definately a problem with one of the million
backslashes and quotes present, but I'm not able to figure it out.
What am I doing wrong?
I believe that you don't need to escape the quotes inside the argument
strings when you call os.execvp(), because there's no shell interpreting
the arguments. So, in theory, what you appear to need would be
os.execvp(condor_q,[condor_q,-l,-constraint,'ProjectId==anoopr_samadams.fnal.gov_161903_30209'])
or even, since I don't see the need for the quotes in the first place,
os.execvp(condor_q,[condor_q,-l,-constraint,'ProjectId==anoopr_samadams.fnal.gov_161903_30209'])
or
os.execvp(condor_q,[condor_q,-l,-constraint,ProjectId==anoopr_samadams.fnal.gov_161903_30209])
regards
Steve
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Holden Web LLC +1 800 494 3119
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Re: Python Win32 Silent Install
On Wed, 01 Dec 2004 17:15:38 -0500, Steve Holden [EMAIL PROTECTED] wrote: You are right about ActiveState, the copy you download from their web site is licensed to prohibit redistribution. They might be prepared to cut you a special license, but you'd have to ask them about that. Does it mean it's not allowed to build an application with ActiveState Python, and generate an installer that installs the whole thing, forcing users to go to ActiveState's web site and download the interpreter? Gee, that changes everything... Luke. -- http://mail.python.org/mailman/listinfo/python-list
Re: Time zones
Timothy Hume [EMAIL PROTECTED] writes:
I want to ensure that all my time calculations are done in UTC. This is
easy with Python on UNIX machines. I simply set the TZ environment
variable to UTC, and it ensures that the time functions use UTC.
My question is, how do I get similar functionality using Python on
Windows?
If you're just talking about time module functions, I think you should
be able to do the same thing. The time functions are overlays for the
C library versions which do use tzset() and look at the TZ environment
variable as under Unix.
py24
Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
Type help, copyright, credits or license for more information.
import time
print time.tzname
('Eastern Standard Time', 'Eastern Daylight Time')
print time.ctime()
Wed Dec 01 17:42:08 2004
TZ=UTC py24
Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
Type help, copyright, credits or license for more information.
import time
print time.tzname
('UTC', '')
print time.ctime()
Wed Dec 01 22:42:21 2004
(I've used 2.4 here, but the same results work back until 1.5.2)
-- David
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Re: Python Win32 Silent Install
Luke Skywalker wrote: On Wed, 01 Dec 2004 17:15:38 -0500, Steve Holden [EMAIL PROTECTED] wrote: You are right about ActiveState, the copy you download from their web site is licensed to prohibit redistribution. They might be prepared to cut you a special license, but you'd have to ask them about that. Does it mean it's not allowed to build an application with ActiveState Python, and generate an installer that installs the whole thing, forcing users to go to ActiveState's web site and download the interpreter? Gee, that changes everything... Luke. Obviously the license agreement at http://www.activestate.com/Products/ActivePython/license_agreement.plex would be the authoritative statement. ActiveState do, however, license their distribution for OEM purposes, as the links to the right of the above-quoted page suggest. However, the current Community License (v4) says: ... 2. You may make and give away verbatim copies of this Package for personal use, or for use within your organization, provided that you duplicate all of the original copyright notices and associated disclaimers. You may not distribute copies of this Package, or copies of packages derived from this Package, to others outside your organization without specific prior written permission from ActiveState (although you are encouraged to direct them to sources from which they may obtain it for themselves). ... This makes is pretty clear that if you plan to distribute outside your own organization they expect you to get an OEM license if you want to use their distribution. regards Steve -- http://www.holdenweb.com http://pydish.holdenweb.com Holden Web LLC +1 800 494 3119 -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Win32 Silent Install
You guessed correctly. Python is on HP (and Compaq now) PCs because I put it there. And yes, I did get the I've found Python on my computer, what does it do and can I remove it from the support group. How to answer that?You have a computer with Windows Script Host (JScript VBScript) built in and you want to remove Python?I think the best answer is it does all kinds of wonderful things! You can remove it, of course (easy enough, it is in the Add / Remove Programs list, after all), but why don't you learn how to use it instead?(I even unhooked the file association to prevent Python file attachments in emails from giving a black eye to Python, so out of the box, it was relatively safe). I've use Python and the Win32 extensions for much of the automation of the process that pre-installs all the software on the PCs. Of course, Python is very versatile and is ideal for the wide range of tasks, large and small that are involved.Being that it is both powerful and easy to learn (and also because of no lack of evangelism (I hate that term, but don't have a better synonym) on my part), it has been adopted as the main language used by the whole division for build-automation related tasks. Before Python, I wrote the tools in C++ and did scripting with JScript. I don't think I have to tell anyone on this list how dramatic an increase in productivity Python can give over these in many areas (there are a still a few areas where the C++ tools reign, but Python also works well with those). I was contacted by Kevin Altis and later Stephan Deibel about doing a Python success story about this and I was game.I did start it, but didn't get it finished in time for the Python Success Story book before OSCON 2004 in July and have since put it on the back burner.I need to take a little vacation from work, so I can finish that. - Matt -- http://mail.python.org/mailman/listinfo/python-list
database questions ala newbie pythonist
Hello,
Just started with python and databases.
I am making a small script to update a local database.
Looked around and couldn't find to many links with info about python with
databases.
Any links or other resources anyone can recommend is appreciated.
My question is in the following small script:
##
import dbi
import odbc
myconn = odbc.odbc('testpy')
mycursor = myconn.cursor()
mycursor.execute('Update Categories Set DelStatus = 0 Where ProductID =
1190' )
mycursor.close()
myconn.close()
...
###
This works fine using the literals 0 (For Delstatus) and 1190 (for
ProductID)
But when I try to use a variable such as:
###
...
varA = '0'
varB = '1190'
mycursor.execute('Update Categories Set DelStatus = ' varA 'Where ProductID
= ' varB)
...
###
I get errors. Please excuse my ignorance in what is probably obvious to
most others within this newsgroup.
What I am trying to do is to update my database from a 2 field .CSV file
I figured I could load the CSV file into a dictionary and parse each row
running a query using the values from varA and VarB from the key value
pairs.
Right now I am just trying to get the database part to work that is why
there is no CSV code.
So I guess what I am asking is how do I pass values through the sql
statement:
###
...
mycursor.execute('Update Categories Set DelStatus = X1 Where ProductID =
X2' )# Values replacing X1 and X2.
...
###
Any help is greatly appreciated.
Chris
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Re: Python Win32 Silent Install
Matt Gerrans wrote: You guessed correctly. Python is on HP (and Compaq now) PCs because I put it there. Do you think you could expand on the brief description about this that is to be found in the following page? http://www.python.org/doc/faq/installed.html The python.org webmaster email address gets *lots* of requests from innocent and ignorant users who are concerned about finding this thing called Python on their new machines, and most of them seem curiously more interested in removing it than in discovering what it actually is there for. The auto-response points them to the above page, I believe, and it would perhaps save the webmaster types some time if there was a more official HP version of the situation than the Apparently some of HP/Compaq's administrative tools are written in Python. comment that is there now. -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 and Tkinter
FWIW, we just installed Python 2.4 (on RH Linx 8), rebuilt it from scratch and everything is fine. Tkinter is there, _tkinter as well and idle comes up as expected. /Jean Brouwers In article [EMAIL PROTECTED], Jeffrey Barish [EMAIL PROTECTED] wrote: http://www.python.org/moin/TkInter -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 and Python Regrets
Dave Benjamin wrote: Steve Holden wrote: from __past__ import __mistakes__ LOL! Better yet: import __past__ del __past__.__mistakes__ You can't change the past, as everyone knows, so the names in that module are constants, like None is in Python 2.4. It's better simply not to spend time looking at it, following the Pythonic DCOSM** idiom clearly suggests: from __past__ import __mistakes__ del __mistakes__ Of course, those who forget history are doomed to repeat it, so it might be better to do this, even though it's in violation of common Python stylistic advice: from __past__ import * del __mistakes__ Unfortunately, I'm not sure whether you'll get a NameError here, because the from xx import * pattern generally doesn't retrieve names that begin with an underscore... -sucking-up-bandwidth-for-all-its-worth-ly y'rs, Peter ** Don't cry over spilt milk, of course... -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Win32 Silent Install
Peter Hansen wrote: ... innocent and ignorant users who are concerned about finding this thing called Python on their new machines, and most of them seem curiously more interested in removing it than in discovering what it actually is there for. This has been my experience as well. I don't have millions or even thousands of users... only hundreds. However, this is the exact same reason that I try to hide Python installs and make them unremovable. I guess all of the Windows based Spyware and Adware have made people overly cautious... if it looks suspicious, then remove it. To the average user, the name 'Python' doesn't sound harmless either. -- http://mail.python.org/mailman/listinfo/python-list
Dr. Dobb's Python-URL! - weekly Python news and links (Dec 2)
QOTW: ... why does Microsoft try so hard to protect its sources? To avoid embarrassment. -- Peter Maas and Grant Edwards http://groups.google.com/groups?frame=leftth=9a599152d8b23b54 Sufficiently advanced cluelessness is indistinguishable from malice. -- Alex Martelli 2.4 is final, buildable under Windows in at least a couple of ways, improved, ... http://www.brunningonline.net/simon/blog/archives/001657.html asyncore, Twisted, the Python core...--do you understand how they relate to TLS, serial-port usage, GUI-oriented event processing, and so on? http://groups.google.com/groups?th=752ebdb8b57fa3f3 Ian Bicking and others describe the meaning of Python 3000. http://groups.google.com/groups?frame=leftth=8f9b6a3959888f2b Reading without blocking is possible--with care. http://groups.google.com/groups?frame=leftth=78654cfc06d2fbbe Josiah Carlson and Paul McGuire explain decorators. http://groups.google.com/groups?th=5bfb80b43887bc1f Nick Coghlan knows sick ways to spell file. http://groups.google.com/groups?frame=rightth=e562a771d1c827c9 Python works in Frontier. http://radio.weblogs.com/0100039/2004/11/30.html#a626 Everything Python-related you want is probably one or two clicks away in these pages: Python.org's Python Language Website is the traditional center of Pythonia http://www.python.org Notice especially the master FAQ http://www.python.org/doc/FAQ.html PythonWare complements the digest you're reading with the marvelous daily python url http://www.pythonware.com/daily Mygale is a news-gathering webcrawler that specializes in (new) World-Wide Web articles related to Python. http://www.awaretek.com/nowak/mygale.html While cosmetically similar, Mygale and the Daily Python-URL are utterly different in their technologies and generally in their results. comp.lang.python.announce announces new Python software. Be sure to scan this newsgroup weekly. http://groups.google.com/groups?oi=djqas_ugroup=comp.lang.python.announce Brett Cannon continues the marvelous tradition established by Andrew Kuchling and Michael Hudson of intelligently summarizing action on the python-dev mailing list once every other week. http://www.python.org/dev/summary/ The Python Package Index catalogues packages. http://www.python.org/pypi/ The somewhat older Vaults of Parnassus ambitiously collects references to all sorts of Python resources. http://www.vex.net/~x/parnassus/ Much of Python's real work takes place on Special-Interest Group mailing lists http://www.python.org/sigs/ The Python Business Forum further[s] the interests of companies that base their business on ... Python. http://www.python-in-business.org Python Success Stories--from air-traffic control to on-line match-making--can inspire you or decision-makers to whom you're subject with a vision of what the language makes practical. http://www.pythonology.com/success The Python Software Foundation (PSF) has replaced the Python Consortium as an independent nexus of activity. It has official responsibility for Python's development and maintenance. http://www.python.org/psf/ Among the ways you can support PSF is with a donation. http://www.python.org/psf/donate.html Kurt B. Kaiser publishes a weekly report on faults and patches. http://www.google.com/groups?as_usubject=weekly%20python%20patch Cetus collects Python hyperlinks. http://www.cetus-links.org/oo_python.html Python FAQTS http://python.faqts.com/ The Cookbook is a collaborative effort to capture useful and interesting recipes. http://aspn.activestate.com/ASPN/Cookbook/Python Among several Python-oriented RSS/RDF feeds available are http://www.python.org/channews.rdf http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi http://python.de/backend.php For more, see http://www.syndic8.com/feedlist.php?ShowMatch=pythonShowStatus=all The old Python To-Do List now lives principally in a SourceForge reincarnation. http://sourceforge.net/tracker/?atid=355470group_id=5470func=browse http://python.sourceforge.net/peps/pep-0042.html The online Python Journal is posted at pythonjournal.cognizor.com. [EMAIL PROTECTED] and [EMAIL PROTECTED] welcome submission of material that helps people's understanding of Python use, and offer Web presentation of your work. *Py: the Journal of the Python Language* http://www.pyzine.com Archive probing tricks of the trade: http://groups.google.com/groups?oi=djqas_ugroup=comp.lang.pythonnum=100
Re: wxPython to build an HTML analyser/displayer?
Luke Skywalker [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Does wxWidgets offer an HTML displayer widget, Yes. In general it is highly recommended to download wxPython and the associated demo app. The demo app shows every single widget so you get an idea of what is available, what they look like and you can examine the demo code to see how they are used. and is it good enough? Unlikely. It is a simple HTML viewer and doesn't support stylesheets amongst other things. (It does support adding your own tags, widgets and virtual filesystems though). More details are at http://www.lpthe.jussieu.fr/~zeitlin/wxWindows/docs/wxwin_wxhtml.html (The Tags supported by wxHTML 75% of the way down will be useful information for you) However the good news is you have two alternatives. One is that on Windows you can use the IE HTML display widget directly. See the demo. If you need to be cross platform then wxMozilla is worth looking at (which is apparently active despite appearing dormant). Start at http://wxmozilla.sourceforge.net/pmwiki/pmwiki.php/Main/Documentation Roger -- http://mail.python.org/mailman/listinfo/python-list
Re: non blocking read()
Donn Cave wrote: If we are indeed talking about a pipe or something that really can block, and you call fileobject.read(1024), it will block until it gets 1024 bytes. No, it won't, it will block until *some* data is available, and then return that (up to a maximum of 1024). If the fd has just been reported by select() as ready for reading, then something is there, so the first read() call won't block. But if there was exactly 1024 bytes there, the second read() call *will* block, because there are now 0 bytes available (which I think is what an earlier poster was hinting at). For this reason, if you have no way of knowing how much data to expect in advance, it's better to avoid making more than one read() call on a fd per select(). If you don't get a whole line (or whatever chunk you're looking for), put what you've got into a buffer, and go back to select(). When you've built up a complete chunk in the buffer, process it. Keep in mind that part of the next chunk may be in the tail of the buffer, so be prepared to chop a chunk off the beginning of the buffer and leave the rest for later. Another possibility that's been suggested is putting the fd into non-blocking mode. I wouldn't recommend that; the last time I tried it (which was quite a long time ago) select() and non-blocking I/O didn't mix well. While it may be possible to get it to work, I don't think you'd gain much. You need to understand that there's no guaranteed relationship between the chunks of data written to one end of a pipe or socket and those returned by reading the other end. So you'd still need to be prepared to buffer and re-chunk the data. You'd end up doing all of what I outlined above, with the extra complication of non-blocking I/O thrown in. I don't see any advantage in it. -- Greg Ewing, Computer Science Dept, University of Canterbury, Christchurch, New Zealand http://www.cosc.canterbury.ac.nz/~greg -- http://mail.python.org/mailman/listinfo/python-list
Re: non blocking read()
Steve Holden wrote: When access is made to a file object in non-blocking mode it will return whatever data there are immediately available in the buffers, up to the number of bytes requested. If the buffers are currently empty the process will generate an error Are you sure that's right? If so, it would seem that reading a non-blocking disk file would *never* return any data... -- Greg Ewing, Computer Science Dept, University of Canterbury, Christchurch, New Zealand http://www.cosc.canterbury.ac.nz/~greg -- http://mail.python.org/mailman/listinfo/python-list
Re: Video Catalogue
Rodney Dangerfield [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Greetz!
Recently I started creating a CGI application for my gf that
she would use for indexing and keeping track of her video
collection.
I am relatively new to python so I started with the basics.
I figured out how to extract the form field values in a
script and how to save to a file.
My question is which data type should I use to store the information
about the videos? I was thinking of using a dictionary variable,
I saw something about the pickle module too, could I use it to
save the state of my dictionary to a file and than later read it
and feed values from it to the form fields via CGI?
All help is greatly appreciated.
I think a dictionary might work well, I might use a dictionary within a
dictionary.
vidiodict =
{'Title':{'description':'','date':'','cast':'','length':'130.99','comments':''}}
that way you could look at vidiodict['Title']['length'] it returns '130.99'.
Tom
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[PIL] import error
import image gives Traceback (most recent call last): File image1.py, line 7, in ? import image ImportError: No module named image i've installed python 2.3.4 and PIL for python 2.3 -- http://mail.python.org/mailman/listinfo/python-list
Re: [PIL] import error
On Thu, 02 Dec 2004 13:10:25 +1000, Egor Bolonev [EMAIL PROTECTED] wrote: ho error is bad case. there must be import Image import image gives Traceback (most recent call last): File image1.py, line 7, in ? import image ImportError: No module named image i've installed python 2.3.4 and PIL for python 2.3 -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPython to build an HTML analyser/displayer?
On Wed, 1 Dec 2004 16:57:45 -0800, Roger Binns [EMAIL PROTECTED] wrote: (snip) Thx the links. Luke. -- http://mail.python.org/mailman/listinfo/python-list
Re: recombination variations
alphabet = {
'A': 'A',
'T': 'T',
'C': 'C',
'G': 'G',
'W': 'AT',
'M': 'AC',
'R': 'AG',
'Y': 'TC',
'K': 'TG',
'S': 'CG',
'H': 'ATC',
'D': 'ATG',
'V': 'AGC',
'B': 'CTG',
'N': 'ATCG'
}
expand = lambda t: reduce(lambda r, s: [x+y for x in r for y in
alphabet[s]], t, [''])
print expand('ATSGS')
--
['ATCGC', 'ATCGG', 'ATGGC', 'ATGGG']
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Re: ANN: IPython 0.6.5 is out
Looks cool. I will have to check it out. -- http://mail.python.org/mailman/listinfo/python-list
Re: pre-PEP generic objects
Steven Bethard [EMAIL PROTECTED] wrote: Nick Craig-Wood wrote: Steven Bethard [EMAIL PROTECTED] wrote: I promised I'd put together a PEP for a 'generic object' data type for Python 2.5 that allows one to replace __getitem__ style access with dotted-attribute style access (without declaring another class). Any comments would be appreciated! My experience from using this is that whenever I used Hash(), I found that later on in the refinement of the conversion it became its own class. This has also generally been my experience, though I'm not sure it's as true for the XML DOM to Bunch translation. Did you use Hash() in the same way for hierarchical data? Hash() got nested yes, but not in a general purpose structure like your XML example. So my take on the matter is that this encourages perl style programming (just ram it in a hash, and write lots of functions acting on it) rather than creating a specific class for the job which is dead easy in python anyway and to which you can attach methods etc. You'll note that the (pre-)PEP explicitly notes that this object is intended only for use when no methods are associated with the attributes: When no methods are to be associated with the attribute-value mappings, declaring a new class can be overkill. I do understand your point though -- people might not use Bunch in the way it's intended. Of course, those same people can already do the same thing with a dict instead (e.g. write a bunch of functions to handle a certain type of dict). If someone wants to write Perl in Python, there's not much we can really do to stop them... No there isn't ;-) The above does make it a lot more convenient though blob['foo'] is rather difficult to type compared to blob.foo! -- Nick Craig-Wood [EMAIL PROTECTED] -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Re: database questions ala newbie pythonist
chris wrote:
...
This works fine using the literals 0 (For Delstatus) and 1190 (for
ProductID)
But when I try to use a variable such as:
###
...
varA = '0'
varB = '1190'
mycursor.execute('Update Categories Set DelStatus = ' varA 'Where ProductID
= ' varB)
use string formatting expressions
(which are easier to handle than string concatenation) :
'UPDATE Categories SET DelStatus=%d WHERE ProductID=%s;' % (varA,'1190')
or maybe
UPDATE Categories SET DelStatus='%d' WHERE ProductID='%d'; % (0,varB)
if your DB wants your int's as string
###
I get errors. Please excuse my ignorance in what is probably obvious to
most others within this newsgroup.
What I am trying to do is to update my database from a 2 field .CSV file
I figured I could load the CSV file into a dictionary and parse each row
running a query using the values from varA and VarB from the key value
pairs.
happy pythoning
Herbert
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