ANN: cclib 0.7 released
cclib 0.7 is now available for download from http://cclib.sf.net. cclib is an open source library, written in Python, for parsing and interpreting the results of computational chemistry packages. It currently parses output files from ADF, GAMESS (US), GAMESS-UK, Gaussian, Jaguar and PC GAMESS. The main new features in this release are: * a Jaguar parser * cclib now extracts the Gaussian basis, the MP-corrected energies, and the Cartesian displacement vectors * Charge Decomposition Analysis, Fragment analysis For more details, see http://cclib.sf.net/wiki/index.php/Changelog Among other data, cclib extracts: * coordinates * atomic orbital information * molecular orbital information * information on vibrational modes * the results of a TD-DFT calculation (For a complete list see http://cclib.sf.net/wiki/index.php/Parsed_Data). cclib also provides some calculation methods for interpreting some electronic properties of molecules using analyses such as: * Mulliken population analysis * Overlap population analysis * Calculation of Mayer's bond orders. For information on how to use cclib, see http://cclib.sf.net/wiki/index.php/Using_cclib. If you need help, find a bug, want new features or have any questions, please send an email to our mailing list: [EMAIL PROTECTED] Regards, The cclib development team -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: Technical Answer - Protecting code in python
On Wed, 21 Mar 2007 20:59:57 -0400, Bart Willems wrote: Or the consultant wants to be sure that the two dimwitted nimcumpoops at the office who /think/ they can write code don't screw up the script when they're trying to 'fix' or 'improve' something. And blame the consultant if the script all of a sudden stops working 'we did not do anything. It just stopped working all of a sudden'. Or he doesn't want to expose the passwords needed to logon to the database server. Or whatever. So, there are reasons enough why someone wants to render his code immutable and/or unreadable *to some extent*. And that's what I've been asking. How to protect the code depends on what you are trying to protect it from. Why is that so hard to understand? In the above scenarios, one solution is: chmod a-w script.py If they don't have write permission, they can't improve it by adding bugs. If they take the time and effort to give themselves write permission, then they have accepted responsibility for breaking it. The OP clearly states that he does not want a discussion as to why to protect the code. The OP might not want such a discussion, but without it, any answers he gets are sure to be bad answers except by accident. All he wants is something that turns 'readable, changeable python' into 'unreadable, immutable python'. chown scriptuser script.py # a unique user chmod a-rwx script.py chmod u+rx script.py I believe that fully meets the functional requirements. Where shall I send the invoice? -- Steven D'Aprano -- http://mail.python.org/mailman/listinfo/python-list
Re: Technical Answer - Protecting code in python
I didn´t reply to the last D´Aprano reply just to avoid this kind of social war. And yes, I know that if I want 100% security I should not distribute my code. And there is a better way that is not doing any code to be more secure and bug-free (now I am using irony). And no, I am not supporter of software patents, RIAA and DRM. And Mr. Willems understood very well my problem and my condition. And others too in the beginning of the post. But look...after mr D´Aprano enters it starts this social warfare. So where is the troll? In fact I think the heroes series was based in this thread (Hiros read it and come back in time) Because there is some people who have special DNAs that give powers to see beyond their problems and environments, so they can read the post, understand and give technical details, understanding this is not comp.lang.python.social-activism-political-be-open-not-evil About trolls: No way I will do this question only to say to others: Look python can´t do this like does.. or Look now I will active the pet-people-living-in-welfare-trying-to-be- political in the list and they will join and sing songs about the revolution.. if you do a search in this group for this problem you will see more political whining than answers in this type of questions... Just look this post!! Seriously read one by one Begining ok.. 2 ok ,3 ok , 4 ok .. and bang..!!! Going back in the beginning I said : So PLEASE, don't try to convince me about the social / economical / open source / give to all / be open / all people are honest until prove contrary / dance with the rabbits... So who is failing to acknowledge the question? AND AGAIN someone will search for protecting python code and will see the same whining and political threads... I think the python community is great, and I love the python language, if you search for superflit in this group you will see that I love python and the community, I am a newbie, but I am not imposing my beliefs I am just saying that my reality is a little different and I need a answer for a particular problem. That is the reason because I always recommend people to travel out of their CONTINENT, and stay more than 5 months living in another culture. I can elaborate a more intelectual answer but sorry. I have to work at 6:00 am to pay my bills, and if I get unemployed there is no welfare, nothing , nada, zero. I believe in reincarnation, so next time I will aim better :) For me this thread is closed, and I think this is the most crazy thread in this list. Thank you all, for the technical answers, and sorry if I insult anyone directly or indirectly ( I am a political incorrect person) That´s all folks..finito -- http://mail.python.org/mailman/listinfo/python-list
Re: Technical Answer - Protecting code in python
On Wed, 21 Mar 2007 22:59:46 -0700, flit wrote: Going back in the beginning I said : So PLEASE, don't try to convince me about the social / economical / open source / give to all / be open / all people are honest until prove contrary / dance with the rabbits... I have done NONE of that. I've just pointed out, time and time again, that you haven't asked a meaningful question. Even after all these posts, still won't tell us what you are trying to protect against. People copying your program? Competitors infringing your patents? Your corrupt and bad government (your words) infringing your moral rights as an author? Your customer editing your program and breaking it? Who knows? I don't. I wonder whether even you do. You keep asking for a technical solution, even if a technical solution is not appropriate, but you won't tell us what the problem is. Tell us the threat you want to protect against, and we'll suggest meaningful solutions. -- Steven D'Aprano -- http://mail.python.org/mailman/listinfo/python-list
Re: Technical Answer - Protecting code in python
On Thu, 22 Mar 2007 09:11:51 +1100, Ben Finney wrote: Steven D'Aprano [EMAIL PROTECTED] writes: Is your program valuable? Is it worth money? Then the 90% of script kiddies will just wait three days, and download the program off the Internet after the real hackers have broken your protection. The real hackers wouldn't be doing that. The crackers, however, might. I quote Bruce Schneier: [quote] For years I have refused to play the semantic hacker vs. cracker game. There are good hackers and bad hackers, just as there are good electricians and bad electricians. Hacker is a mindset and a skill set; what you do with it is a different issue. [end quote] See his essay on What is a hacker here: http://www.schneier.com/blog/archives/2006/09/what_is_a_hacke.html In addition, virtually nobody outside of the IT hacker subculture knows what you're talking about if you talk about crackers. Out network was brought down by a biscuit??? -- Steven D'Aprano -- http://mail.python.org/mailman/listinfo/python-list
Color Segmentation w/ PIL?
I'm trying to write a Digital Image Processing program using the PIL library, and upon consultation of the Handbook I see that it seems to have built in functions to run Edge Detection (in the ImageFilter module), but I don't see anything about Segmentation. Are there any built-in tools to do this operation? Has anyone done this operation with PIL in the past that can lead me in the right direction? -- http://mail.python.org/mailman/listinfo/python-list
Re: Garbage collection
Alex Martelli wrote: Tom Wright [EMAIL PROTECTED] wrote: real programs. I can't help thinking that there are some situations where you need a lot of memory for a short time though, and it would be nice to be able to use it briefly and then hand most of it back. Still, I see the practical difficulties with doing this. What I do in those cases: a. fork b. do the memory-hogging work in the child process c. meanwhile the parent just waits d. the child sends back to the parent the small results e. the child terminates f. the parent proceeds merrily I learned this architectural-pattern a long, long time ago, around the time when fork first got implemented via copy-on-write pages... Yup, it's easier to be pragmatic and find the real solution to your problem than it is to try and mould reality to your idea of what the solution should be ... regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 idea: reversing the order of chained assignments
Terry Reedy wrote: Mark T [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] | This is interesting: | | class Test(object): | ... def __getattribute__(self,n): | ... print 'reading',n | ... return object.__getattribute__(self,n) | ... def __setattr__(self,n,v): | ... print 'writing',n,v | ... return object.__setattr__(self,n,v) | ... | x=Test() | x.a=1; x.b=2; x.c=3 | writing a 1 | writing b 2 | writing c 3 | x.a=x.b=x.c | reading c | writing a 3 | writing b 3 | | | I wouldn't have expected a to be assigned first in a right-to-left parsing | order. The result is the same in any case. The assignment order is specified in the language reference. Where? I'm looking at http://docs.python.org/ref/assignment.html right now. But many never read and those who do can forget. And even if the coder reads and remembers, a code reader may not have. Which is why I suggested multiple statements in explicit order when it really matters. The current docs define a, b = c, d and a = b, c, d and a, b, c = d as valid assignments, but I can't find the part where a = b = c is defined. Help me out here. It looks as though the real syntax should be something like assignment_stmt ::= (target_list =)+ expression_list | (target_list =)+ assignment_stmt regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: [JOB] Sr. Python Developer, Northern VA
Steven D. Arnold wrote: Neosynapse is seeking a senior software developer located in or Subtract ten points from your credibility for writing senior here. willing to relocate to the Northern VA area to join a project building one of the largest grid computing data platforms in the world. Skill and experience required for this engagement include: Another 10 points minus for claiming to be the largest (biggest, industry leader etc.). Are you looking for a developer or is this just an ad for your company? * at least 7 years experience in professional software development; Minus 20 points for using the term professional. Open source is cool. * at least 3 years of Python software development experience; OK. You can ask for that. As long as you're not blind when someone shows you some code. I mean some people can't see code until it's connected to some 'job'. * proven experience with design, implementation, debugging and documentation of large projects; Hmm. Why, may I ask? Can you even code? Who are you anyway? * past experience with the development of networking client and server software; You really seem to know what you want, eh? * experience using SQL databases in the development of software applications; Experience, experience, experience. Why don't you just re-hire the one you just fired because he wouldn't say yes to your absurd demands? I mean after he made a honest guesstimate of the time frame necessary for the job and you pinned him down to the minute? * excellent written and oral communication skills, including the ability to clearly explain design choices and discuss alternatives with colleagues and managers. Yeah. The following skills are desirable but not mandatory: * experience using SAN file systems; * experience with general web software development; * experience writing applications that leverage Oracle databases; * experience writing and integrating C modules with Python; * experience with Ruby or Ruby on Rails. * endure stupid boss messing with the creative process. You must be able to function independently as you will work from home a significant amount of time on this project. Limited travel to PA, NJ, and CO will be required. The initial phase of this project will last 6 months, with follow-on work planned for approximately 3 years. Says you. It could be anything from 3 months to ten years, depending on how often you change your mind. If interested and qualified for this position, please submit your detailed resume, contact and rate requirements to [EMAIL PROTECTED] with the subject line PY-5. Principals only. Go away with that resume Why do you think you have a right to my personal info when you're not giving any? By the way, I'm in Europe, there's more than just US you know. A. /rant -- http://mail.python.org/mailman/listinfo/python-list
Re: Regexp problem with `('
Zeng Nan wrote: On Thu, Mar 22, 2007 at 01:26:22AM -0700, Johny wrote: I have the following text titleGoods Item 146 (174459989) - OurWebSite/title from which I need to extract `Goods Item 146 ' Can anyone help with regexp? Thank you for help L. (Goods\s+Item\s+146\s+) [snigger] regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Mastering Python
For future reference, and I hope you don't mind the lesson, the past tense of bind is bound (I can't state it as a firm rule, but many *ind words seem to go *ound: bind, find, wind [as in wrap, not blowing in the...], grind - bound, found, wound [not to confuse with an injury], ground [not to confuse with dirt]... But mind - minded G) blind - blound # couldn't resist yet another counterexample ;-) -- http://mail.python.org/mailman/listinfo/python-list
How to use unix_md5_crypt from Perl in Python?
Dear list members,
I have a Perl script which crypts a password using a clearteaxt password
and a username.
Example:
username = '[EMAIL PROTECTED]'
password = 'root'
The crypted password is: 'roK20XGbWEsSM'
The crypted password always starts with the first 2 characters of the
username (here: 'ro' from '[EMAIL PROTECTED]').
The Perl script contains this code and I am wondering how I can do this
in Python:
#
my $CryptedPw = '';
# md5 pw
if ($Self-{ConfigObject}-Get('AuthModule::DB::CryptType')
$Self-{ConfigObject}-Get('AuthModule::DB::CryptType') eq 'md5') {
$CryptedPw = unix_md5_crypt($Pw, $Param{UserLogin});
}
# crypt pw
else {
# crypt given pw (unfortunately there is a mod_perl2 bug
# on RH8 - check if
# crypt() is working correctly) :-/
if (crypt('root', '[EMAIL PROTECTED]') eq 'roK20XGbWEsSM') {
$CryptedPw = crypt($Pw, $Param{UserLogin});
}
else {
$Self-{LogObject}-Log(
Priority = 'notice',
Message = The crypt() of your mod_perl(2) is not working
correctly! Update mod_perl!,
);
my $TempUser = quotemeta($Param{UserLogin});
my $TempPw = quotemeta($Pw);
my $CMD = perl -e \print crypt('$TempPw', '$TempUser');\;
open (IO, $CMD | ) || print STDERR Can't open $CMD: $!;
while (IO) {
$CryptedPw .= $_;
}
close (IO);
chomp $CryptedPw;
}
}
#
What do I have to do in Python to create the crypted password
'roK20XGbWEsSM' by using '[EMAIL PROTECTED]' for username and 'root' for
password?
I tried:
username = '[EMAIL PROTECTED]'
password = 'root'
import crypt
crypt.crypt(username, password)
'roowueH.vq6VM'
This creates 'roowueH.vq6VM' but not 'roK20XGbWEsSM'. :-(
Thanks in advance,
Nico
--
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Re: Python 3000 idea: reversing the order of chained assignments
Mark T wrote:
Alex Martelli [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
John Nagle [EMAIL PROTECTED] wrote:
Marcin Ciura wrote:
Neither would I. I must have expressed myself not clearly enough.
Currently
x = y = z
is roughly equivalent to
x = z
y = z
I propose to change it to
y = z
x = z
Actually, it is equivalent to
y = z
x = y
Not really:
class chatty(object):
... def __init__(self): self.__dict__['__hide'] = {}
... def __setattr__(self, name, value):
... print 'sa', name, value
... self.__dict__['__hide'][name] = value
... def __getattr__(self, name):
... print 'ga', name
... return self.__dict__['__hide'].get(name)
...
c = chatty()
x = c.zop = 23
sa zop 23
As you can see, there is no read-access to c.zop, which plays the role
of y there.
Alex
This is interesting:
class Test(object):
... def __getattribute__(self,n):
... print 'reading',n
... return object.__getattribute__(self,n)
... def __setattr__(self,n,v):
... print 'writing',n,v
... return object.__setattr__(self,n,v)
...
x=Test()
x.a=1; x.b=2; x.c=3
writing a 1
writing b 2
writing c 3
x.a=x.b=x.c
reading c
writing a 3
writing b 3
I wouldn't have expected a to be assigned first in a right-to-left parsing
order. The result is the same in any case.
It would be nice if your confusion could have been avoided by reading
the reference manual, but unfortunately the current syntax definition
doesn't seem to even acknowledge the possibility of multiple assignments
such as the one under discussion!
regards
Steve
--
Steve Holden +44 150 684 7255 +1 800 494 3119
Holden Web LLC/Ltd http://www.holdenweb.com
Skype: holdenweb http://del.icio.us/steve.holden
Recent Ramblings http://holdenweb.blogspot.com
--
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Re: Python 3000 idea: reversing the order of chained assignments
Virgil Dupras [EMAIL PROTECTED] wrote: I think I see what Marcin means. The 'node' is changed too fast in the chain, and next is assigned to 'nextnode' instead of being assigned to node. I can see why Marcin was confused. Many other languages assignment is an expression, so a=b=c is simply a=(b=c). In Python it isn't an expression, the chained assignment is a specific part of the syntax, so (as with chained comparisons) the semantics may be surprising to the uninitiated. As a matter of interest do PyLint or PyChecker check for this situation (chained assignment where the target of an assignment is also a subexpression of a later assignment)? Also it may be worth noting that unpacking has a similar behaviour: node, node.next = nextnode, nextnode has the same result as the chained assignment: the RHS is a tuple and is fully evaluated before the assignment, but the LHS is not a tuple and the assignment happens strictly left to right with each assignment fully completed before proceeding to the next one. -- http://mail.python.org/mailman/listinfo/python-list
Regexp problem with `('
I have the following text titleGoods Item 146 (174459989) - OurWebSite/title from which I need to extract `Goods Item 146 ' Can anyone help with regexp? Thank you for help L. -- http://mail.python.org/mailman/listinfo/python-list
Re: why brackets commas in func calls can't be ommited? (maybe it could be PEP?)
Dennis Lee Bieber a écrit : On Thu, 22 Mar 2007 03:27:37 +1100, Steven D'Aprano [EMAIL PROTECTED] declaimed the following in comp.lang.python: So what should a b c d be? (a, b, c, d) a(b, c, d) a(b, (c, d)) a(b(c, d)) a(b(c(d))) Have I missed anything? Which is the right way? Who can tell? a(b)(c)(d) or, explicit, ((a(b))(c))(d) G (Yeah ((Lisp) (is back))) -- http://mail.python.org/mailman/listinfo/python-list
Re: [Swig-user] How to receive a FILE* from Python under MinGW?
On 22/03/2007 3.46, Carl Douglas wrote: Hi Giovanni, I was wondering if gccmrt can be used with older 3.x versions of GCC? Thanks I think so, but I have not tried it. You just need to copy gccmrt to the bin directory, and then copy libmsvcrt.a into libmsvcr60.a, and libmsvcrtd.a into libmsvcr60d.a. After that, it should just works. Let me know if it works for you, so that I can report results on the webpage. -- Giovanni Bajo -- http://mail.python.org/mailman/listinfo/python-list
Re: Regexp problem with `('
On Thu, Mar 22, 2007 at 01:26:22AM -0700, Johny wrote: I have the following text titleGoods Item 146 (174459989) - OurWebSite/title from which I need to extract `Goods Item 146 ' Can anyone help with regexp? Thank you for help L. (Goods\s+Item\s+146\s+) -- Zeng Nan MY BLOG: http://zengnan.blogspot.com Public Key: http://pgp.mit.edu/ | www.keyserver.net ~~~ In Lexington, Kentucky, it's illegal to carry an ice cream cone in your pocket. ~~~ pgp46CeY9IZzI.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: How to receive a FILE* from Python under MinGW?
On 22/03/2007 3.13, John Pye wrote: I suggest people to try my GCC 4.1.2 binary installer for Windows which fully integrates with Python and has scripts in place to solve the MSVCR71.DLL problem. It was announced on this very list a few days ago: http://www.develer.com/oss/GccWinBinaries Hi Giovanni, Thanks very much for that suggestion. It looks like you have done some good work on addressing this problem. I wonder if you might be able to expand on what those 'serious problems' with GCC 4.x on the Windows platform are? Have a look here: http://www.mingw.org/MinGWiki/index.php/GccStatus Also, can you comment on how one might use your compiler bundle with MSYS? In particular, I like to run SCons from an MSYS prompt. Assuming I don't want to kill my old MinGW and Cygwin installations, how do you recommend that one proceeds to set up a working GCC 4 environment on Windows? (I haven't downloaded it just yet; I'm on Linux today!) I personally don't use MSYS so I don't know exactly. I use SCons too, and I simply run it from the normal command prompt. I *believe* it's sufficient to unpack MSYS somewhere (you can either unpack it *over* the directory where you installed my GCC package, or somewhere else, I believe it works either way); since the GCC binaries are added to the system PATH by the installer, you should able to run it anyway. You can try by simply invoking gcc -v at the MSYS prompt and see if it's picking up the right version of GCC. I would appreciate if you give some feedback about this. I would like to incorporate your findings on the webpage. -- Giovanni Bajo -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 idea: reversing the order of chained assignments
Duncan Booth wrote: Virgil Dupras [EMAIL PROTECTED] wrote: I think I see what Marcin means. The 'node' is changed too fast in the chain, and next is assigned to 'nextnode' instead of being assigned to node. I can see why Marcin was confused. Many other languages assignment is an expression, so a=b=c is simply a=(b=c). In Python it isn't an expression, the chained assignment is a specific part of the syntax, so (as with chained comparisons) the semantics may be surprising to the uninitiated. As a matter of interest do PyLint or PyChecker check for this situation (chained assignment where the target of an assignment is also a subexpression of a later assignment)? Where's the published syntax for chained assignment? Also it may be worth noting that unpacking has a similar behaviour: node, node.next = nextnode, nextnode has the same result as the chained assignment: the RHS is a tuple and is fully evaluated before the assignment, but the LHS is not a tuple and the assignment happens strictly left to right with each assignment fully completed before proceeding to the next one. Well that is explained (albeit badly) in the reference manual: An assignment statement evaluates the expression list (remember that this can be a single expression or a comma-separated list, the latter yielding a tuple) and assigns the single resulting object to each of the target lists, from left to right. That wording appears to be a rather bad mix of factoids from unpacking and chained assignment. Is it just me, or does this whole section need a rewrite? regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Python Oracle 10g odbc blob insertion problem
Dear all,
I cannot find a solution for my problem with inserting a blob object
(4000 in length) into an ORACLE database via ODBC.
I have tried the two ways of inserting the blob object (a zip file):
1)
fp = open(c:/test/test.zip, r+b)
data = fp.read()
s = odbc.odbc(cs)
qry = s.cursor()
qry.execute(Insert into tBlob (data) values ('%s') %
data.encode('hex'))
return the error: Input String Too Long Limit: 4096
2)
qry.execute(Insert into tBlob (data) values (?),
data.encode('hex'))
does not return error, but it does not insert the record correctly.
Any help will be fully appreciated...
--
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Re: [JOB] Sr. Python Developer, Northern VA
Steve Holden wrote: /rant Feel better now? Yes! But *now* I'm afraid it will have negative consequences for my future employability. However if it will lead to adjusting the kind of submissions at http://www.python.org/community/jobs/ it was probably worth it. A. 'thanks for asking' -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Oracle 10g odbc blob insertion problem
Godzilla wrote:
Dear all,
I cannot find a solution for my problem with inserting a blob object
(4000 in length) into an ORACLE database via ODBC.
I have tried the two ways of inserting the blob object (a zip file):
1)
fp = open(c:/test/test.zip, r+b)
data = fp.read()
s = odbc.odbc(cs)
qry = s.cursor()
qry.execute(Insert into tBlob (data) values ('%s') %
data.encode('hex'))
return the error: Input String Too Long Limit: 4096
2)
qry.execute(Insert into tBlob (data) values (?),
data.encode('hex'))
does not return error, but it does not insert the record correctly.
Any help will be fully appreciated...
Try, just on the off chance:
qry.execute(Insert into tBlob (data) values (?),
(data.encode('hex'), ))
The second argument to execute should always be a tuple. And be aware
that the odbc module hasn't had much maintenance lately.
regards
Steve
--
Steve Holden +44 150 684 7255 +1 800 494 3119
Holden Web LLC/Ltd http://www.holdenweb.com
Skype: holdenweb http://del.icio.us/steve.holden
Recent Ramblings http://holdenweb.blogspot.com
--
http://mail.python.org/mailman/listinfo/python-list
Re: [JOB] Sr. Python Developer, Northern VA
Anton Vredegoor wrote: Steven D. Arnold wrote: [...] /rant Feel better now? regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Regexp problem with `('
Johny a écrit : I have the following text titleGoods Item 146 (174459989) - OurWebSite/title from which I need to extract `Goods Item 146 ' Can anyone help with regexp? Sure : the documentation is here: http://docs.python.org/lib/module-re.html And there's a nice tutorial here: http://www.amk.ca/python/howto/regex/ Read all this, try to solve your problem, and come back with what you've done so far if you need more help. Thank you for help You're welcome. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to use unix_md5_crypt from Perl in Python?
Nico Grubert [EMAIL PROTECTED] writes:
Example:
username = '[EMAIL PROTECTED]'
password = 'root'
The crypted password is: 'roK20XGbWEsSM'
that looks like you want crypt(3), not md5. See:
http://docs.python.org/lib/module-crypt.html
Sample session:
import crypt
print crypt.crypt('root','ro')
roK20XGbWEsSM
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Re: On Java's Interface (the meaning of interface in computer programing)
On 21 Mar, 19:11, Lew [EMAIL PROTECTED] wrote: Dr. Who wrote: Don't Feed The Trolls :-) But, but - you fed me!? [blah] We could put up a contest - whoever finds and corrects the most errors in the post wins. Ties broken by the quality of the correct explanations. Incorrect explanations count against the entry. -- Lew Or you could stop feeding the trolls. -- http://mail.python.org/mailman/listinfo/python-list
Re: why brackets commas in func calls can't be ommited? (maybe it could be PEP?)
dmitrey wrote: if you want result = func1(func2(arg)) you should use result = func1 (func2 arg) This is in conflict with current meanig, Ergo it breaks old code rgds \SK -- http://mail.python.org/mailman/listinfo/python-list
Re: interpreting glyph outlines from ttfquery?
swiftset wrote: I'm try to convert a glyph into a format I can easily numerically manipulate. So far I've figured out how to use ttfquery to get a list that represents the outline of a contour in a glyph: from ttfquery import describe, glyphquery, glyph f = describe.openFont(/usr/share/fonts/truetype/freefont/ FreeSans.ttf) n = glyphquery.glyphName(f, 'D') g = glyph.Glyph(n) c = g.calculateContours(f) o = glyph.decomposeOutline(c[1]) o looks like: [array([182, 82],'s'), (354, 82), (420.29, 90.014), (474.91, 114.0), ..., array([182, 82],'s'), array([182, 82],'s')] Is this a polyline? decomposeOutline docstring confirms -- it's a polyline. I think elements marked with 's' starts new subpath. w. -- http://mail.python.org/mailman/listinfo/python-list
Re: Garbage collection
Tom Wright [EMAIL PROTECTED] wrote: real programs. I can't help thinking that there are some situations where you need a lot of memory for a short time though, and it would be nice to be able to use it briefly and then hand most of it back. Still, I see the practical difficulties with doing this. What I do in those cases: a. fork b. do the memory-hogging work in the child process c. meanwhile the parent just waits d. the child sends back to the parent the small results e. the child terminates f. the parent proceeds merrily I learned this architectural-pattern a long, long time ago, around the time when fork first got implemented via copy-on-write pages... Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Oracle 10g odbc blob insertion problem
Godzilla wrote:
Dear all,
I cannot find a solution for my problem with inserting a blob object
(4000 in length) into an ORACLE database via ODBC.
I have tried the two ways of inserting the blob object (a zip file):
1)
fp = open(c:/test/test.zip, r+b)
data = fp.read()
s = odbc.odbc(cs)
qry = s.cursor()
qry.execute(Insert into tBlob (data) values ('%s') %
data.encode('hex'))
return the error: Input String Too Long Limit: 4096
2)
qry.execute(Insert into tBlob (data) values (?),
data.encode('hex'))
does not return error, but it does not insert the record correctly.
Any help will be fully appreciated...
I would certainly recommend that you think about using the cxOracle
package rather than relying on odbc. Most Orcale users do, with evident
satisfaction.
regards
Steve
--
Steve Holden +44 150 684 7255 +1 800 494 3119
Holden Web LLC/Ltd http://www.holdenweb.com
Skype: holdenweb http://del.icio.us/steve.holden
Recent Ramblings http://holdenweb.blogspot.com
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python Oracle 10g odbc blob insertion problem
On 22 Mar, 10:21, Godzilla [EMAIL PROTECTED] wrote:
I cannot find a solution for my problem with inserting a blob object
(4000 in length) into an ORACLE database via ODBC.
This brings back happy memories with Oracle 9i and JDBC.
I have tried the two ways of inserting the blob object (a zip file):
1)
fp = open(c:/test/test.zip, r+b)
data = fp.read()
s = odbc.odbc(cs)
qry = s.cursor()
qry.execute(Insert into tBlob (data) values ('%s') %
data.encode('hex'))
return the error: Input String Too Long Limit: 4096
2)
qry.execute(Insert into tBlob (data) values (?),
data.encode('hex'))
does not return error, but it does not insert the record correctly.
Any help will be fully appreciated...
If I recall correctly, JDBC provided an API to stream the contents
into the column. That is, you needed to provide an instance of one of
the mutually incompatible Java stream classes (I don't remember which
one) when setting the value, and then the database would suck up the
contents. It's quite possible that a similar mechanism involving file-
like objects exists in the different Python modules for Oracle,
although I haven't checked.
Paul
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python-URL! - weekly Python news and links (Mar 22)
Cameron Laird a écrit : This is the first time you've received Python-URL! in 2007. No, that's not the fault of your mail server; we've just been on sabbatical. Now we're back. Great ! I was a bit worried... -- http://mail.python.org/mailman/listinfo/python-list
Re: Python-URL! - weekly Python news and links (Mar 22)
Bruno Desthuilliers wrote: Cameron Laird a écrit : This is the first time you've received Python-URL! in 2007. No, that's not the fault of your mail server; we've just been on sabbatical. Now we're back. Great ! I was a bit worried... Seconded; I've always looked forward to the Python-URL and I was a bit afeared that it had run out of steam. Good to see it back... and thanks for keeping it up! TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: On Java's Interface (the meaning of interface in computer programing)
Lew [EMAIL PROTECTED] writes: Xah Lee wrote: In a functional language, a function can be specified by its name and Are you sure you know what a functional language is? parameter specs. For example: f(3) f(3, [9,2]) f(some string) This is not really typical syntax for a functional language. LISP, for example, has the function name as an element of a list. (Some might argue that LISP isn't exactly a functional language.) And nobody really cares, since syntax doesn't make a functional language anyways ... Regards -- Markus -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Oracle 10g odbc blob insertion problem
On Mar 22, 10:56 pm, Steve Holden [EMAIL PROTECTED] wrote:
Godzilla wrote:
Dear all,
I cannot find a solution for my problem with inserting a blob object
(4000 in length) into an ORACLE database via ODBC.
I have tried the two ways of inserting the blob object (a zip file):
1)
fp = open(c:/test/test.zip, r+b)
data = fp.read()
s = odbc.odbc(cs)
qry = s.cursor()
qry.execute(Insert into tBlob (data) values ('%s') %
data.encode('hex'))
return the error: Input String Too Long Limit: 4096
2)
qry.execute(Insert into tBlob (data) values (?),
data.encode('hex'))
does not return error, but it does not insert the record correctly.
Any help will be fully appreciated...
I would certainly recommend that you think about using the cxOracle
package rather than relying on odbc. Most Orcale users do, with evident
satisfaction.
regards
Steve
--
Steve Holden +44 150 684 7255 +1 800 494 3119
Holden Web LLC/Ltd http://www.holdenweb.com
Skype: holdenwebhttp://del.icio.us/steve.holden
Recent Ramblings http://holdenweb.blogspot.com- Hide quoted text -
- Show quoted text -
Thanks guys for all your help.
Steve, I think I've tried what you have suggested without any luck as
well... The statement works fine, but what inserted is not correct...
it seems like only the symbol '?' was inserted into the blob field...
I will try the suggested cxOracle library in place of odbc as a
trial... but I think since 95% of the code is using odbc, it would be
hard to convince the team to chance to the new library... anyway, I
will let you know how it goes.
--
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Re: On Java's Interface (the meaning of interface in computer programing)
Jim Burton wrote: Or you could stop feeding the trolls. People need to stop saying that. The original post was a detailed if incorrect exposition of Java information. How in the world do you rate that trollish? I have absolutely no reason to rate the OP as a troll or their post as trollish. -- Lew -- http://mail.python.org/mailman/listinfo/python-list
Re: On Java's Interface (the meaning of interface in computer programing)
Lew [EMAIL PROTECTED] writes: Jim Burton wrote: Or you could stop feeding the trolls. Does not apply. The OP was not being trollish You obviously don't know Xah. He's been doing this for years, cross- posting to various language groups trying to start an argument between them. He even brags about being a troll on his web site. sherm-- -- Web Hosting by West Virginians, for West Virginians: http://wv-www.net Cocoa programming in Perl: http://camelbones.sourceforge.net -- http://mail.python.org/mailman/listinfo/python-list
Re: fine grain logging cotrol
Eric S. Johansson wrote: I need to to be able to conditionally log based on the method the log statement is in and one other factor like a log level. in order to do so, I need to be able to automatically find out the name of the method and its class but I haven't found out how to do that yet. for example, class catus(Felis): def Siamese_cat( yowl, purr, demand_food): ... log(state of litter box %s% litter_box.smell, level = 1) If the table of methods logged contains catus.Siamese_cat, then I would expect to see the output of the log statements in a log file. If not then I wouldn't see anything in the log. Has somebody done this already? Is it even possible to do without manually adding the class and method information for every log statement? a related question is using signals for reloading configurations etc. I have to find any good examples of how to use signals to cause a long-running process to reload external data. Any good pointers? http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66062 regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
fine grain logging cotrol
I need to to be able to conditionally log based on the method the log statement is in and one other factor like a log level. in order to do so, I need to be able to automatically find out the name of the method and its class but I haven't found out how to do that yet. for example, class catus(Felis): def Siamese_cat( yowl, purr, demand_food): ... log(state of litter box %s% litter_box.smell, level = 1) If the table of methods logged contains catus.Siamese_cat, then I would expect to see the output of the log statements in a log file. If not then I wouldn't see anything in the log. Has somebody done this already? Is it even possible to do without manually adding the class and method information for every log statement? a related question is using signals for reloading configurations etc. I have to find any good examples of how to use signals to cause a long-running process to reload external data. Any good pointers? --- eric -- http://mail.python.org/mailman/listinfo/python-list
Re: Removing a particular index from a list
Srikanth wrote: Hi, list.remove(item) removes the first item from the list, but how do I say to remove a particular index from a list without using it's value? Let's say I have 4 items in my list as li = [sri, s, srikanth, s] And if I want to remove the last item (s), how do I remove it? li.remove(-1) doesn't do it. This is my problem. li = [sri, s, srikanth, s] del li[-1] li ['sri', 's', 'srikanth'] regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Removing a particular index from a list
li = [sri, s, srikanth, s] And if I want to remove the last item (s), how do I remove it? li.remove(-1) doesn't do it. This is my problem. Thanks, Srikanth li.pop() will remove the last element Cyril -- http://mail.python.org/mailman/listinfo/python-list
Re: Removing a particular index from a list
Srikanth wrote: list.remove(item) removes the first item from the list, but how do I say to remove a particular index from a list without using it's value? Let's say I have 4 items in my list as li = [sri, s, srikanth, s] And if I want to remove the last item (s), how do I remove it? li.remove(-1) doesn't do it. del li[-1] This is my problem. This, or not reading the tutorial. http://docs.python.org/tut/node7.html#SECTION00720 Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Removing a particular index from a list
Peter Otten wrote: Srikanth wrote: list.remove(item) removes the first item from the list, but how do I say to remove a particular index from a list without using it's value? Let's say I have 4 items in my list as li = [sri, s, srikanth, s] And if I want to remove the last item (s), how do I remove it? li.remove(-1) doesn't do it. del li[-1] This is my problem. This, or not reading the tutorial. No, that's OUR problem :-) -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Removing a particular index from a list
Thanks Steve, Cyril and Peter. This, or not reading the tutorial. http://docs.python.org/tut/node7.html#SECTION00720 Peter I read this 2 months ago and I expected it to be a method of list, but I sound like I am making an excuse. Thanks a lot. Regards, Srikanth -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 idea: reversing the order of chained assignments
Steve Holden [EMAIL PROTECTED] wrote: Help me out here. It looks as though the real syntax should be something like assignment_stmt ::= (target_list =)+ expression_list | (target_list =)+ assignment_stmt That is precisely the point. If it was: assignment_stmt ::= (target_list =) expression_list | (target_list =) assignment_stmt (i.e. removing the '+' which your eyes jumped over) then the actual assignments would have to apply right to left with each assignment giving the result for the next one. But since it is: assignment_stmt ::= (target_list =)+ expression_list the repeated target lists may be expected, and are indeed defined, to assign left to right. -- http://mail.python.org/mailman/listinfo/python-list
Removing a particular index from a list
Hi, list.remove(item) removes the first item from the list, but how do I say to remove a particular index from a list without using it's value? Let's say I have 4 items in my list as li = [sri, s, srikanth, s] And if I want to remove the last item (s), how do I remove it? li.remove(-1) doesn't do it. This is my problem. Thanks, Srikanth -- http://mail.python.org/mailman/listinfo/python-list
Re: Removing a particular index from a list
Steve Holden wrote: Peter Otten wrote: Srikanth wrote: list.remove(item) removes the first item from the list, but how do I say to remove a particular index from a list without using it's value? Let's say I have 4 items in my list as li = [sri, s, srikanth, s] And if I want to remove the last item (s), how do I remove it? li.remove(-1) doesn't do it. del li[-1] This is my problem. This, or not reading the tutorial. No, that's OUR problem :-) And the fact that it's our /self-inflicted/ problem makes it all the more severe :-) Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: fine grain logging cotrol
Eric S. Johansson wrote: I need to to be able to conditionally log based on the method the log statement is in and one other factor like a log level. in order to do so, I need to be able to automatically find out the name of the method and its class but I haven't found out how to do that yet. for example, class catus(Felis): def Siamese_cat( yowl, purr, demand_food): ... log(state of litter box %s% litter_box.smell, level = 1) If the table of methods logged contains catus.Siamese_cat, then I would expect to see the output of the log statements in a log file. If not then I wouldn't see anything in the log. Has somebody done this already? Is it even possible to do without manually adding the class and method information for every log statement? a related question is using signals for reloading configurations etc. I have to find any good examples of how to use signals to cause a long-running process to reload external data. Any good pointers? Instead of rolling your own, use the logging package which can handle everything but the class info out of the box (levels are spelt as method names info(), warn() etc.). import logging class LoggedType(type): def __new__(mcl, name, bases, classdict): classdict[logger] = logging.getLogger(name) return type.__new__(mcl, name, bases, classdict) class Felis: __metaclass__ = LoggedType def alpha(self): self.logger.info(felis-alpha) class Catus(Felis): def alpha(self): self.logger.info(catus-alpha) def beta(self): self.logger.info(catus-beta) if __name__ == __main__: logging.basicConfig(format=%(name)s.%(funcName)s: %(message)s, level=logging.INFO) f = Felis() f.alpha() c = Catus() c.alpha() c.beta() If the metaclass bothers you, here's a simpler alternative: class Felis(object): logger = logging.getLogger(Felis) def alpha(self): self.logger.info(felis-alpha) class Catus(Felis): logger = logging.getLogger(Catus) def alpha(self): self.logger.info(catus-alpha) def beta(self): self.logger.info(catus-beta) Peter -- http://mail.python.org/mailman/listinfo/python-list
My MVC critique
Looking at different MVC frameworks from many langauges from PHP to Python, I've concluded that the explosion of MVC frameworks is mainly due to undisciplined unexperienced programmers. Nobody would argue about the separation of the layers because this is not the problem I have with it, if anything most implementations emphasis separation at the wrong places. The end solutions end up looking very mickey mouse. It's been long asserted starting with Smalltalk there there be a separation of layers with an application starting with the view (what the user sees), the controller (which controls the flow of the application) and the model (the representation of the data). What MVC does not emphasis is the separation of the data access layer, one of the most important pieces of an application. So what is done with this? For many the DAL is either encapsulated within the model or some toolkit that generates the SQL for them, this may lead to decreased overall security of a database and inefficient queries. The catalyst for MVC frameworks on the web has been the slew of poorly written applications mostly in PHP Perl , this has driven many programmers looking for control consistency. However this need is short sighted when people find a magical bullet MVC Framework, and do not place emphasis on minimization reusability of code. Therefore you end up with the same paradigm as before, just crappy applications separated out into pieces. No doubt there should be separation of layers, but there also has to be a real dialogue about programming as a discipline science, not as a craft of gluing popsicle sticks together. There should be more discussion of architecture before a project starts and more code reviews and discussions in project teams. Also one off projects (putting one programming on an island giving them a compiler/interpreter) is a great way to get a crappy application. That being said, I presently don't use one, but I'm still holding out for an MVC framework that works for me and provides me power, flexibility and is well documented. -- http://mail.python.org/mailman/listinfo/python-list
Re: [JOB] Sr. Python Developer, Northern VA
Anton == Anton Vredegoor [EMAIL PROTECTED] writes: Anton Steve Holden wrote: Feel better now? Anton Yes! But *now* I'm afraid it will have negative consequences for Anton my future employability. However if it will lead to adjusting the Anton kind of submissions at http://www.python.org/community/jobs/ it Anton was probably worth it. I think the steady increase in the number of active listings over the past couple years bodes well for the job prospects of Python programmers as a whole. There are currently 99 job postings on the job board dating back to mid-December. A year ago there were about 60, a year before that, about 40. A number of those companies seem to be fairly enlightened about the use of open source software (search for open). You can't expect the world to completely change overnight. Most companies probably still funnel external job postings through their HR departments. As a result, a certain amount of boilerplate text and corporate puffery is bound to turn up in many postings. Be thankful they at least found the job board or comp.lang.python and aren't just trying to recruit through traditional channels. You'd probably never see job postings for the Space Telescope Science Institute or The World Wide Workshop for Children's Media Technology and Learning if they only appeared in the Washington Post or New York Times. Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: Garbage collection
Steve Holden [EMAIL PROTECTED] wrote: ... a. fork b. do the memory-hogging work in the child process c. meanwhile the parent just waits d. the child sends back to the parent the small results e. the child terminates f. the parent proceeds merrily I learned this architectural-pattern a long, long time ago, around the time when fork first got implemented via copy-on-write pages... Yup, it's easier to be pragmatic and find the real solution to your problem than it is to try and mould reality to your idea of what the solution should be ... That's why all progress is due to the unreasonable man, hm?-) Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: On Java's Interface (the meaning of interface in computer programing)
On 22 Mar, 12:45, Lew [EMAIL PROTECTED] wrote: Jim Burton wrote: Or you could stop feeding the trolls. People need to stop saying that. The original post was a detailed if incorrect exposition of Java information. How in the world do you rate that trollish? I have absolutely no reason to rate the OP as a troll or their post as trollish. -- Lew Oh, in that case welcome to usenet. Take a while to settle in. There's this guy here called Xah and he is a troll. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to receive a FILE* from Python under MinGW?
On Mar 22, 7:23 pm, Giovanni Bajo [EMAIL PROTECTED] wrote: I personally don't use MSYS so I don't know exactly. I use SCons too, and I simply run it from the normal command prompt. I *believe* it's sufficient to unpack MSYS somewhere (you can either unpack it *over* the directory where you installed my GCC package, or somewhere else, I believe it works either way); since the GCC binaries are added to the system PATH by the installer, you should able to run it anyway. You can try by simply invoking gcc -v at the MSYS prompt and see if it's picking up the right version of GCC. I would appreciate if you give some feedback about this. I would like to incorporate your findings on the webpage. Hi Giovanni I downloaded your package and installed it in c:/mingw1. It complained that it could not detect Python, although I have Python 2.4 installed on my system (did you check HKCU as well as HKLM, perhaps?) I note that the gccmrt utility does not work from MSYS. You will need to provide a shell-script equivalent version, in order for that to be useful for MSYS users. So I opened a cmd prompt and ran the command, then restarted my MSYS session. There is also a need to be able to query the *current state* of the gccmrt option. Next I built my code. It all compiled OK, all the way through to my NSIS bundle. So that was nice. It includes gfortran, flex, bison, SWIG/ Python and Tcl/Tk linkage: a bit of a coup. BUT when I try to run my program, I get a windows error msgbox, python.exe - Entry Point Not Found: The procedure entry point _ctype could not be located in the dynamic link library msvcr71.dll. I don't know what the cause of that missing symbol could be, unless it has something to do with the fact that I am linking with -lgfortran. As well as the python module that fails to load (above) I also have a Tcl/Tk based executable which crashes on launch. Also seems to be something with msvcr71, but I can't tell for sure. Have you got any ideas? -- http://mail.python.org/mailman/listinfo/python-list
Re: My MVC critique
On Mar 22, 2007, at 9:29 AM, [EMAIL PROTECTED] wrote: mickey mouse Well, at least you spelled Mickey Mouse right... :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 idea: reversing the order of chained assignments
Duncan Booth wrote: Steve Holden [EMAIL PROTECTED] wrote: Help me out here. It looks as though the real syntax should be something like assignment_stmt ::= (target_list =)+ expression_list | (target_list =)+ assignment_stmt That is precisely the point. If it was: assignment_stmt ::= (target_list =) expression_list | (target_list =) assignment_stmt (i.e. removing the '+' which your eyes jumped over) then the actual assignments would have to apply right to left with each assignment giving the result for the next one. But since it is: assignment_stmt ::= (target_list =)+ expression_list the repeated target lists may be expected, and are indeed defined, to assign left to right. Thanks, I see the plus sign now and appreciate that it indicates one or more of, so the syntax is correct. But syntax doesn't imply semantics, so a left-recursive or right-recursive syntax formulation wouldn't require any change to the semantics of assignment. In other words, assignment_stmt ::= (target_list =) expression_list | (target_list =) assignment_stmt and assignment_stmt ::= (target_list =) assignment_stmt | (target_list =) expression_list are entirely equivalent, and neither imply any order of execution. I'm sure you understand that syntax only specifies what's legal, not how it should be interpreted. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: On Java's Interface (the meaning of interface in computer programing)
jim burton [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] On 22 Mar, 12:45, Lew [EMAIL PROTECTED] wrote: Jim Burton wrote: Or you could stop feeding the trolls. People need to stop saying that. The original post was a detailed if incorrect exposition of Java information. How in the world do you rate that trollish? I have absolutely no reason to rate the OP as a troll or their post as trollish. -- Lew Oh, in that case welcome to usenet. Take a while to settle in. There's this guy here called Xah and he is a troll. Why oh why does anyone even bother to respond to Xah Lee? See the true Xah at: http://node60091.multiply.com/photos/album/1 WARNING: Nudity!!! Not family- or work-friendly!!! -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 idea: reversing the order of chained assignments
Duncan Booth wrote: Steve Holden [EMAIL PROTECTED] wrote: As a matter of interest do PyLint or PyChecker check for this situation (chained assignment where the target of an assignment is also a subexpression of a later assignment)? Where's the published syntax for chained assignment? http://docs.python.org/ref/assignment.html More specifically, since you seem to have missed it, it's the '+' in the line: assignment_stmt ::= (target_list =)+ expression_list And then the clear statement assigns the single resulting object to each of the target lists, from left to right. Got it, thanks. See my further remarks in my reply to your last. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: fine grain logging cotrol
Peter Otten wrote: Eric S. Johansson wrote: I need to to be able to conditionally log based on the method the log statement is in and one other factor like a log level. in order to do so, I need to be able to automatically find out the name of the method and its class but I haven't found out how to do that yet. for example, class catus(Felis): def Siamese_cat( yowl, purr, demand_food): ... log(state of litter box %s% litter_box.smell, level = 1) If the table of methods logged contains catus.Siamese_cat, then I would expect to see the output of the log statements in a log file. If not then I wouldn't see anything in the log. Has somebody done this already? Is it even possible to do without manually adding the class and method information for every log statement? a related question is using signals for reloading configurations etc. I have to find any good examples of how to use signals to cause a long-running process to reload external data. Any good pointers? Instead of rolling your own, use the logging package which can handle everything but the class info out of the box (levels are spelt as method names info(), warn() etc.). I was planning on using logging. I've been using syslog for too long import logging class LoggedType(type): def __new__(mcl, name, bases, classdict): classdict[logger] = logging.getLogger(name) return type.__new__(mcl, name, bases, classdict) __new__ is new to me. took a look at http://www.python.org/download/releases/2.2.3/descrintro/#__new__ which give me some clue but not enough. what I get is that in call initialization, you add an entry to the class dict (adds new method??). I see that name, bases, or classdict are part of the normal class construction process and refer to the class under construction. I'm guessing mcl comes from __metaclass__ and defaults to type? the getLogger creates a logging channel so there is one channel per class? but what selects the class for output or is that a derived logger class I need to create? also, how could one automatically determine the method doing the logging? class Felis: __metaclass__ = LoggedType needed in every top level class? def alpha(self): self.logger.info(felis-alpha) class Catus(Felis): def alpha(self): self.logger.info(catus-alpha) def beta(self): self.logger.info(catus-beta) if __name__ == __main__: logging.basicConfig(format=%(name)s.%(funcName)s: %(message)s, level=logging.INFO) f = Felis() f.alpha() c = Catus() c.alpha() c.beta() If the metaclass bothers you, here's a simpler alternative: simpler to implement but more error prone. I like the metaclass model. now if one could fill in the class and method name automatically, life would be good. -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing tables with beautiful soup?
cjl [EMAIL PROTECTED] wrote:
This works:
for row in soup.find(table,{class: class_name}):
for cell in row:
print cell.contents[0]
Is there a better way to do this?
It may work for the page you are testing against, but it wouldn't work if
your page contained valid HTML. You are assuming that the TR elements are
direct children of the TABLE, but HTML requires that the TR elements appear
inside THEAD, TBODY or TFOOT elements, so if anyone ever corrects the html
your code will break.
Something like this (untested) ought to work and be reasonably robust:
table = soup.find(table,{class: class_name})
for row in table.findAll(tr):
for cell in row.findAll(td):
print cell.findAll(text=True)
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Re: interpreting glyph outlines from ttfquery?
Wojciech Muła wrote: swiftset wrote: I'm try to convert a glyph into a format I can easily numerically manipulate. So far I've figured out how to use ttfquery to get a list that represents the outline of a contour in a glyph: from ttfquery import describe, glyphquery, glyph f = describe.openFont(/usr/share/fonts/truetype/freefont/ FreeSans.ttf) n = glyphquery.glyphName(f, 'D') g = glyph.Glyph(n) c = g.calculateContours(f) o = glyph.decomposeOutline(c[1]) o looks like: [array([182, 82],'s'), (354, 82), (420.29, 90.014), (474.91, 114.0), ..., array([182, 82],'s'), array([182, 82],'s')] Is this a polyline? decomposeOutline docstring confirms -- it's a polyline. I think elements marked with 's' starts new subpath. w. Examples of rendering self.contours and self.outlines (created by self.compile on the Glyph) using OpenGL operations are in the toolsfont module in OpenGLContext: http://pyopengl.cvs.sourceforge.net/pyopengl/OpenGLContext/scenegraph/text/toolsfont.py?view=markup The outlines are simple 2D line-loops, the things with 's' are array objects (not start coordinates), you can convert the whole thing to a consistent array with numpy.array (or Numeric.array). That is, the 's' is just an artefact of how the calculation was done, the values are all 2-element coordinates, some as Python tuples, some as 2-element Numeric/numpy short arrays. HTH, Mike -- Mike C. Fletcher Designer, VR Plumber, Coder http://www.vrplumber.com http://blog.vrplumber.com -- http://mail.python.org/mailman/listinfo/python-list
Been a while...
Hi guys. It's been a while since I've used Python, so I got a little rusty, but I really want to start using it again, just out of habit and for fun. Can anyone suggest a book or a website with little projects I could work on to keep me busy? (I do have Beginning Python with the 10 projects in the back, but those might be a little too involved for me right now.) Thanks! John -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 idea: reversing the order of chained assignments
Steve Holden [EMAIL PROTECTED] wrote: In other words, assignment_stmt ::= (target_list =) expression_list | (target_list =) assignment_stmt and assignment_stmt ::= (target_list =) assignment_stmt | (target_list =) expression_list are entirely equivalent I'm not quite sure what you are getting at. An assigment_stmt and an expression_list are not ambiguous so those two productions are identical (not just equivalent). Perhaps you are thinking of productions like: m_expr ::= u_expr | m_expr * u_expr which will match the same input, but could produce a different parser output than: m_expr ::= u_expr | u_expr * m_expr I'm sure you understand that syntax only specifies what's legal, not how it should be interpreted. I agree that the syntax does not mandate how it should be interpreted, but it does lead to expectations. If the expression_stmt is hidden from the outer assignment_stmt by an inner one then it is reasonable to expect that the inner production will be completely evaluated before the outer assignment happens. i.e. right to left. -- http://mail.python.org/mailman/listinfo/python-list
Re: Been a while...
On Mar 22, 2007, at 10:34 AM, John Salerno wrote: Hi guys. It's been a while since I've used Python, so I got a little rusty, but I really want to start using it again, just out of habit and for fun. Can anyone suggest a book or a website with little projects I could work on to keep me busy? http://www.pythonchallenge.com -- http://mail.python.org/mailman/listinfo/python-list
Question regarding __new__
Hi,
the behaviour I always observed when creating instances by calling the
class A is that '__init__' is always only called when the object
returned by A.__new__ is an instance of A. This can be observed by the
following code:
class A(object):
def __new__(cls, *args, **kwds):
print A.__new__, args, kwds
return object.__new__(B, *args, **kwds)
def __init__(cls, *args, **kwds):
print A.__init__, args, kwds
class B(object):
def __new__(cls, *args, **kwds):
print B.__new__, args, kwds
return object.__new__(cls, *args, **kwds)
def __init__(cls, *args, **kwds):
print B.__init__, args, kwds
Interactively A() then gives:
A()
A.__new__ () {}
__main__.B object at 0xb7bed0ec
Yet [1] says: [...] some rules for __new__: [...] If you return an
object of a different class, its __init__ method will be called.
Am I missing something? Is this documented somewhere else? Also it
would be nice if someone could point me to the function that implements
this in C. I didn't find anything in object.c or typeobject.c.
Best regards
Frank Benkstein.
[1] http://www.python.org/download/releases/2.2/descrintro/#__new__
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Re: #!/usr/bin/env python 2.4?
On Mar 21, 11:11 pm, Sander Steffann [EMAIL PROTECTED] wrote: Hi, Op 21-mrt-2007, om 20:41 heeft [EMAIL PROTECTED] het volgende geschreven: On Mar 21, 11:07 am, Jon Ribbens [EMAIL PROTECTED] wrote: In article [EMAIL PROTECTED], Stargaming wrote: from sys import version_info if version_info[0] 2 or version_info[1] 4: raise RuntimeError(You need at least python2.4 to run this script) That'll fail when the major version number is increased (i.e. Python 3.0). You want: if sys.hexversion 0x020400f0: ... error ... Yes, it was intended to be and 'and' instead of an 'or'. If you make it an 'and' it will not raise the exception on version like 1.5 or 2.3... If you realy want to use version_info, you'll have to do something like: if version_info[0] 2 or (version_info[0] == 2 and version_info[1] 4): raise RuntimeError - Sander I don't see any problem with:: if version_info[0] = 2 and version_info[1] 4: raise RuntimeError() Huh? -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 idea: reversing the order of chained assignments
John Nagle wrote: That's fascinating. Is that a documented feature of the language, or a quirk of the CPython interpreter? Its a documented feature of the language. From the Reference Manual: An assignment statement evaluates the expression list (remember that this can be a single expression or a comma-separated list, the latter yielding a tuple) and assigns the single resulting object to each of the target lists, from left to right. See: http://docs.python.org/ref/assignment.html Ziga -- http://mail.python.org/mailman/listinfo/python-list
Re: Regexp problem with `('
On Mar 22, 3:26 am, Johny [EMAIL PROTECTED] wrote: I have the following text titleGoods Item 146 (174459989) - OurWebSite/title from which I need to extract `Goods Item 146 ' Can anyone help with regexp? Thank you for help L. Here's the immediate answer to your question. import re src = titleGoods Item 146 (174459989) - OurWebSite/title pattern = rtitle(.*)\( re.search(pattern,src).groups()[0] I post it this way so that you can relate the re to your specific question, and then maybe apply this to whatever else you are scraping from this web page. Please don't follow up with a post asking how to extract 45,Rubber chicken from trtd45/tdtdRubber chicken/td/tr. At this point, you should try a little experimentation on your own. -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Regexp problem with `('
Johny wrote:
I have the following text
titleGoods Item 146 (174459989) - OurWebSite/title
from which I need to extract
`Goods Item 146 '
Can anyone help with regexp?
Thank you for help
L.
In general, parsing HTML with regular expressions is a bad idea.
Usually, you use something like BeautifulSoup to parse the HTML,
extract the desired field, like the contents of title, then
work on that.
If you try to do this line by line with regular expressions,
it will fail when the line breaks aren't where you expect. If
you try to do a whole document with regular expressions, other
material such as content in comments can be misrecognized.
Try something like this:
# Regular expression to extract group before (N)
kreextractitem = re.compile(r'^(.*)\(\d+\))
pagetree = BeautifulSoup.BeautifulSoup(stringcontaininghtml)
titleitem = pagetree.find({'title':True, 'TITLE':True})
if titleitem :
titletext = .join(atag.findAll(text=True, recursive=True))
# Text of TITLE item is now in titletext as a string.
groups = kreextractitem.search(titletext)
if groups :
goodsitem = groups.group(1).strip()
# goodsitem now contains everything before ()
This approach will work no matter where the line breaks are in the original
HTML.
John Nagle
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challenge ?
I have a problem I wonder if it has been solved before. I have a dictionnary and I want the values in the dictionnary to be annotated with the rank that would be obtained by sorting the values def annotate_with_rank(my_dict): return my_annotated_dict In other words, any value a_value would become a 2-tuple (a_value,rank_of_a_value) I seek an elegant solution. Alain -- http://mail.python.org/mailman/listinfo/python-list
Re: #!/usr/bin/env python 2.4?
In article [EMAIL PROTECTED], [EMAIL PROTECTED] wrote: I don't see any problem with:: if version_info[0] = 2 and version_info[1] 4: raise RuntimeError() What if the version number is 1.5? -- http://mail.python.org/mailman/listinfo/python-list
State of the Art Software Development Practices
Dan Turk Colorado State University 26 Rockwell Hall Fort Collins, CO 80523-1277 USA March 22, 2007 My name is Dan Turk, and I am a faculty member in the Department of Computer Information Systems at Colorado State University. My colleague, Leo Vijayasarathy, and I are conducting a study to better understand the use of agile software development processes, methods, and techniques, and the benefits and limitations associated with their use. About 2 years ago we performed a similar survey. However, while that survey was targeted solely at people who had already been frequent users of agile processes, the current survey looks to draw data from a larger segment of developers and has been updated for that purpose. Please consider participating in this study by completing a brief survey posted at http://www.business.colostate.edu/leov/research/agile/start.cfm . A summary of the results will be posted to this group at the conclusion of this study. Your responses will be entirely anonymous and confidential. The survey does not collect any identifying information and cannot be tracked to the person completing it. General information about your title and years of experience are requested only to build a profile of the survey respondents. Your participation in this study is voluntary. There are no known risks associated with taking part in it. You may stop participating at any time without penalty or loss of benefits to which you are otherwise entitled. If you have questions regarding your rights as a volunteer in this research, please contact Janell Meldrem, Senior Human Research Administrator, (970) 491-1563, [EMAIL PROTECTED] Thank you in advance for completing the survey and your contribution to this research. If you have any questions about the study or the survey, please call me at 970-491-0467 or email me at [EMAIL PROTECTED] Sincerely, Dan Turk, Ph.D. Associate Professor of Computer Information Systems -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 idea: reversing the order of chained assignments
Mark T wrote:
Alex Martelli [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
John Nagle [EMAIL PROTECTED] wrote:
Marcin Ciura wrote:
Neither would I. I must have expressed myself not clearly enough.
Currently
x = y = z
is roughly equivalent to
x = z
y = z
I propose to change it to
y = z
x = z
Actually, it is equivalent to
y = z
x = y
Not really:
class chatty(object):
... def __init__(self): self.__dict__['__hide'] = {}
... def __setattr__(self, name, value):
... print 'sa', name, value
... self.__dict__['__hide'][name] = value
... def __getattr__(self, name):
... print 'ga', name
... return self.__dict__['__hide'].get(name)
...
c = chatty()
x = c.zop = 23
sa zop 23
As you can see, there is no read-access to c.zop, which plays the role
of y there.
Alex
This is interesting:
class Test(object):
... def __getattribute__(self,n):
... print 'reading',n
... return object.__getattribute__(self,n)
... def __setattr__(self,n,v):
... print 'writing',n,v
... return object.__setattr__(self,n,v)
...
x=Test()
x.a=1; x.b=2; x.c=3
writing a 1
writing b 2
writing c 3
x.a=x.b=x.c
reading c
writing a 3
writing b 3
I wouldn't have expected a to be assigned first in a right-to-left
parsing order. The result is the same in any case.
-Mark T.
That's fascinating. Is that a documented feature of the language,
or a quirk of the CPython interpreter?
John Nagle
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Re: why brackets commas in func calls can't be ommited? (maybe it could be PEP?)
dmitrey wrote: 1st still is shorter by 1 char; considering majority of people use space after comma number of parameters can be big it yileds foo bar baz bar2 bar3 bar4 vs foo(bar, baz, bar2, bar3, bar4) I think most readers already agree on the ambiguities part. Now, for the length of the code... I agree that in you example the first syntax yields a full /five/ spaces less than the second syntax. However, it ignores the fact that if you are creating functions with that many arguments, you are probably doing something wrong. Can't those arguments be provided as a list? Let's see what is shorter: foo bar baz bar2 bar3 bar4 or foo *bars Not to mention that it might (or might not) be a good idea to wrap the function in some kind of class where you can specify a whole bunch of attributes, so that you do not have to call a function with that many arguments to start with. Regards, Bart -- http://mail.python.org/mailman/listinfo/python-list
ZSI, SOAP and .NET web services - problem
I try to connect to web services (written in C#/.NET) with latest ZSI
2.0rc3 library. It just does not work.
from ZSI.ServiceProxy import ServiceProxy
wsdl = 'http://192.168.0.103/NewWebServices/TemplateInsert.asmx?wsdl'
print ServiceProxy(wsdl, tracefile=sys.stdout)
C:\opt\Python25\lib\site-packages\zsi-2.0_rc3-py2.5.egg\ZSI\wstools\WSDLTools.py,
line 1116, in getAddressBinding
WSDLError: No address binding found in port.
This pythonic library must be stupid, because I have no problem to connect
with... Ruby:
require 'soap/wsdlDriver'
require 'rexml/document'
wsdl = 'http://192.168.0.103/NewWebServices/TemplateInsert.asmx?wsdl'
soap = SOAP::WSDLDriverFactory.new(wsdl).create_rpc_driver
#soap.wiredump_file_base = 'soapresult'
p soap.templateInsert('')
It is a shame why Python still has so poor SOAP implementation. Ruby has
SOAP in *standard library*, Python - not. Even PHP5 has very good SOAP
library built in.
I tried to use different library - SOAPpy, but I couldn't. It requires
fpconst library which cannot be installed because its server does not
respond at all. What a shit...
Why nobody wants to add SOAP to standard Python library? XML-RPC was added
and it works without any problems.
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http://blog.zabiello.com
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Re: Printing __doc__
On Mar 21, 8:47 pm, gtb [EMAIL PROTECTED] wrote: Greetings, Don't know the daily limit for dumb questions so I will ask one or more. In a function I can use the statement n = sys._getframe().f_code.co_name to get the name of the current function. Given that I can get the name how can I print the __doc__ string? I cant use the following, it will tell me to bugger off as the string has no such attribute. def spam(self): n = sys._getframe().f_code.co_name print n.__doc__ #Wrong print __doc__ #No good either # print eval(n+'.__doc__') -- http://mail.python.org/mailman/listinfo/python-list
Re: [JOB] Sr. Python Developer, Northern VA
[EMAIL PROTECTED] wrote: I think the steady increase in the number of active listings over the past couple years bodes well for the job prospects of Python programmers as a whole. There are currently 99 job postings on the job board dating back to mid-December. A year ago there were about 60, a year before that, about 40. Agreed. There's now probably even room on the job market for those who don't belong to the select elite of early adopters. We might even root out the professionalist attitude and address the problem of tying people to their resumes. A number of those companies seem to be fairly enlightened about the use of open source software (search for open). You can't expect the world to completely change overnight. If I never speak up there's little chance my ideas will get noticed. But there's probably some better format possible for my message. Most companies probably still funnel external job postings through their HR departments. As a result, a certain amount of boilerplate text and corporate puffery is bound to turn up in many postings. Be thankful they at least found the job board or comp.lang.python and aren't just trying to recruit through traditional channels. Actually, I like people posting their jobs on an unmoderated forum. How else would it be possible to try and get applicants and employers to compare their ideas? I mean, not everyone is able to visit expensive high-profile hiring fests like pycon. You'd probably never see job postings for the Space Telescope Science Institute or The World Wide Workshop for Children's Media Technology and Learning if they only appeared in the Washington Post or New York Times. Sure. But my whole problem is that while I'd be immensely useful in a space telescope science institute or a genome database research institute or in an artists educational institute or in a psychological statistics institute or in a computer science or mathematics institute etc. there is no way people can see that, because they're thinking in resumes, job experience and formal education instead of in just asking themselves what needs to be done and can he do it. You know, like duck typing :-) From what I get around the 'net I gather the problem is a bit less pronounced in the US though. A. -- http://mail.python.org/mailman/listinfo/python-list
Re: Technical Answer - Protecting code in python
Bart Willems schrieb: Aaah, *now* we're getting somewhere... :-) All he wants is something that turns 'readable, changeable python' into 'unreadable, immutable python'. chown scriptuser script.py # a unique user chmod a-rwx script.py chmod u+rx script.py I believe that fully meets the functional requirements. Where shall I send the invoice? If it works on the target machine - I am under the assumption that the client is some kind of government office - more likely to run Windows than it is to run unix/linux/etc. Who has a similar solution for windows? python -m py_compile script.py del script.py Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: Technical Answer - Protecting code in python
Aaah, *now* we're getting somewhere... :-) All he wants is something that turns 'readable, changeable python' into 'unreadable, immutable python'. chown scriptuser script.py # a unique user chmod a-rwx script.py chmod u+rx script.py I believe that fully meets the functional requirements. Where shall I send the invoice? If it works on the target machine - I am under the assumption that the client is some kind of government office - more likely to run Windows than it is to run unix/linux/etc. Who has a similar solution for windows? -- http://mail.python.org/mailman/listinfo/python-list
Re: challenge ?
Hi, On 22 Mar 2007 09:41:43 -0700 alain [EMAIL PROTECTED] wrote: I have a problem I wonder if it has been solved before. I have a dictionnary and I want the values in the dictionnary to be annotated with the rank that would be obtained by sorting the values def annotate_with_rank(my_dict): return my_annotated_dict In other words, any value a_value would become a 2-tuple (a_value,rank_of_a_value) I seek an elegant solution. In your specification of the problem it is unclear what should be done with duplicate values. My solution assigns every value a different rank (starting from 0) such that the highest rank is len(my_dict) - 1. def annotate_with_rank(my_dict): items = my_dict.items() items.sort(key = lambda (k, v): v) return dict((k, (i, v)) for i, (k, v) in enumerate(items)) Best regards, Frank Benkstein. -- GPG (Mail): 7093 7A43 CC40 463A 5564 599B 88F6 D625 BE63 866F GPG (XMPP): 2243 DBBA F234 7C5A 6D71 3983 9F28 4D03 7110 6D51 signature.asc Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Kamaelia Google's Summer of Code 2007
Hi, We're (BBC Research) participating in Google's Summer of Code as a mentor organisation again, and I thought it worth spreading some extra publicity where I think there might be some interested people. (I perhaps should've sent this sooner!) * What's Google Summer of Code? (I suspect most people here know :) Essentially Google are paying students to work on open source projects and being mentored in those projects, producing useful code and learning useful skills. Google's aim is to increase the number of people bitten by the open source bug :-) * How is BBC Research/ Kamaelia involved? Like last year we're a mentor organisation, Kamaelia is the open source project that project applications are invited for. It's aim is to make highly concurrent systems natural to create and simple to maintain. (given a choice of forces the we choose the latter) We seem to be having some success in this and have a number of systems we've built using Kamaelia. Kamaelia is primarily focussed around building networked, multimedia systems, tools and applications, since that's generally our problem domain, however Kamaelia is a generic component framework toolset. Our project ideas and guidance page is here: * http://kamaelia.sourceforge.net/SummerOfCode2007 However, we're also interested other ideas beyond that, especially systems that use Kamaelia that can act as exemplars. To give an idea of potential scope, a list of components can be found here: * http://kamaelia.sourceforge.net/Components * Who can Apply ? You need to be a student now, or in september enrolled at a university degree course or similar level of institution/degree. * When is the deadline ? Monday midnight. * Url? http://code.google.com/soc/ Please feel free to forward this to any students or student groups you would find this interesting ! :-) Regards, Michael. -- Michael Sparks, Senior Research Engineer, BBC Research, Technology Group [EMAIL PROTECTED], Kamaelia Project Lead, http://kamaelia.sf.net/ -- http://mail.python.org/mailman/listinfo/python-list
Re: On Java's Interface (the meaning of interface in computer programing)
Lew wrote: Jim Burton wrote: Or you could stop feeding the trolls. People need to stop saying that. The original post was a detailed if incorrect exposition of Java information. How in the world do you rate that trollish? a) Xah's posting history. b) the cross-posting c) the advocacy of the contents I have absolutely no reason to rate the OP as a troll or their post as trollish. In time you will learn... It wasn't even a good troll. To be a good troll the message actually needs to be interesting enough to get people to read it. -- Nigel Wade, System Administrator, Space Plasma Physics Group, University of Leicester, Leicester, LE1 7RH, UK E-mail :[EMAIL PROTECTED] Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555 -- http://mail.python.org/mailman/listinfo/python-list
Re: Been a while...
On Mar 22, 11:21 am, Michael Bentley [EMAIL PROTECTED] wrote: On Mar 22, 2007, at 10:34 AM, John Salerno wrote: Hi guys. It's been a while since I've used Python, so I got a little rusty, but I really want to start using it again, just out of habit and for fun. Can anyone suggest a book or a website with little projects I could work on to keep me busy? http://www.pythonchallenge.com Python Programming: An Introduction to Computer Science by Zelle has lots of little homework assignments at the end of each chapter. That would probably keep you busy and up-to-snuff. Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: challenge ?
On Mar 22, 9:41 am, alain [EMAIL PROTECTED] wrote:
I have a problem I wonder if it has been solved before.
I have a dictionnary and I want the values in the dictionnary to be
annotated with the rank that would be obtained by sorting the values
def annotate_with_rank(my_dict):
return my_annotated_dict
In other words, any value a_value would become a 2-tuple
(a_value,rank_of_a_value)
Try this:
from operator import itemgetter
my_dict = dict(a=10, b=5, c=8, d=12)
for rank, (key, value) in enumerate(sorted(my_dict.items(),
key=itemgetter(1))):
... my_dict[key] = (value, rank)
my_dict
{'a': (10, 2), 'c': (8, 1), 'b': (5, 0), 'd': (12, 3)}
--
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Re: Python 3000 idea: reversing the order of chained assignments
Virgil Dupras [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] class Node: ... pass ... node = Node() nextnode = Node() backup_node = node node = node.next = nextnode node.next is node True hasattr(backup_node,'next') False Well, I think I am thoroughly confused now. I am a lot less experienced that most of the people posting in this thread, so perhaps that is to be expected, but I actually thought I understood Python fairly well. Maybe I am fooling myself... Let me rename some variables in the code above to something a little easier to follow: class Node: pass ... n1 = Node() n2 = Node() n3 = n1 At this point I beleive I've got the same thing above, just with different reference names. Namely, I have two objects, and three references, the first and third reference now both referring to the first object, the second reference referring to the second object: n1 __main__.Node instance at 0x7ff1d20c n2 __main__.Node instance at 0x7ff1d10c n3 __main__.Node instance at 0x7ff1d20c The discussion is about multiple assignments. Virgil's example should be equivalent to: n1 = n1.next = n2 If assignment were left to right, (i.e., n1 = n1.next, followed by n1.next = n2), then I would expect to get an attribute error because n1 hasn't had the 'next' attribute attached to it yet. That's not what happens, so the other interpretation is that the statement above is equivalent to: n1.next = n2; n1= n1.next (except that n1.next is only evaluated once, but that doesn't matter here). Right? That is, first object 'n1' gets a new attribute, the value of which is a reference to object n2, and then, the name 'n1' is rebound to be a reference to object n2 (note that the object n1 was previously referencing should still be available via name 'n3', and being a mutable object, the new attribute should be visible via 'n3', right? I didn't yet execute the statement above (I just typed it in this post) - let's first check the objects and attributes for what we have prior to this confusing statement: n1 __main__.Node instance at 0x7ff1d20c n2 __main__.Node instance at 0x7ff1d10c n3 __main__.Node instance at 0x7ff1d20c dir(n1) ['__doc__', '__module__'] dir(n2) ['__doc__', '__module__'] dir(n3) ['__doc__', '__module__'] Right... no suprises there. Let's execute that funky statement... n1 = n1.next = n2 We would expect n1 to reference n2 now (my object at ...d10c), which it does: n1 __main__.Node instance at 0x7ff1d10c And we would expect n3 to still be referencing the object at ...d20c, which it also still does: n3 __main__.Node instance at 0x7ff1d20c And we would expect (or I should say I would expect) n3 to now have a 'next' attribute: dir(n3) ['__doc__', '__module__'] It doesn't, which is what Virgil previously pointed out. I'm not quite following the whole discussion (nor the syntax diagrams), so sorry if this was already explined - could someone try again: why is it that n3 here doesn't get the 'next' attribute? Now here's the part that totally floors me: what would you expect to be the attributes on n2 (the object on the far-right of the multi-way assignment statement)? We've made no assigment statements to anything about n2. They should be the same as before, right? dir(n2) ['__doc__', '__module__', 'next'] n2.next __main__.Node instance at 0x7ff1d10c n2 __main__.Node instance at 0x7ff1d10c DUH I'm about speechless... Is it just me being dense, or is there some obvious reason why one would expect this? -- http://mail.python.org/mailman/listinfo/python-list
Re: challenge ?
Hi, again, On Thu, 22 Mar 2007 18:11:46 +0100 Frank Benkstein [EMAIL PROTECTED] wrote: On 22 Mar 2007 09:41:43 -0700 alain [EMAIL PROTECTED] wrote: I have a problem I wonder if it has been solved before. I have a dictionnary and I want the values in the dictionnary to be annotated with the rank that would be obtained by sorting the values def annotate_with_rank(my_dict): return my_annotated_dict In other words, any value a_value would become a 2-tuple (a_value,rank_of_a_value) I seek an elegant solution. In your specification of the problem it is unclear what should be done with duplicate values. My solution assigns every value a different rank (starting from 0) such that the highest rank is len(my_dict) - 1. The two other possibilities were to still make len(my_dict) ranks but assign equal values an equal rank. That would mean that some ranks are untaken. Or, lastly, to make only as much ranks as there are unique values. def annotate_with_rank(my_dict): items = my_dict.items() items.sort(key = lambda (k, v): v) return dict((k, (i, v)) for i, (k, v) in enumerate(items)) def annotate_with_rank_2(my_dict): values = my_dict.values() values.sort() return dict((k, (values.index(v), v)) for k, v in my_dict.iteritems()) def annotate_with_rank_3(my_dict): values = list(set(my_dict.itervalues())) values.sort() return dict((k, (values.index(v), v)) for k, v in my_dict.iteritems()) Best regards, Frank Benkstein. -- GPG (Mail): 7093 7A43 CC40 463A 5564 599B 88F6 D625 BE63 866F GPG (XMPP): 2243 DBBA F234 7C5A 6D71 3983 9F28 4D03 7110 6D51 signature.asc Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: flattening/rolling up/aggregating a large sorted text file
[EMAIL PROTECTED] writes:
Hi,
Given a large ascii file (delimited or fixed width) with one ID field
and dimensions/measures fields, sorted by dimensions, I'd like to
flatten or rollup the file by creating new columns: one for each
combination of dimension level, and summing up measures over all
records for a given ID.
If the wheel has already been invented, great, please point me in the
right direction. If not, please share some pointers on how to think
about this problem in order to write efficient code.
Is a hash with dimension level combinations a good approach, with
values reset at each new ID level?
I know mysql, Oracle etc will do this , but they all have a cap on #
of columns allowed. SAS will allow unlimited columns, but I don't own
SAS.
Thanks.
ID,color,shape,msr1
--
001, blue, square, 4
001, red , circle,5
001, red, circle,6
ID, blue_circle, blue_square, red_circle, red_square
--
001,0,4,11,0
002 ...
Something like:
import sys
from sets import Set
ids = {}
keys = Set()
for line in sys.stdin:
ID,COL,SHAPE,VAL = [s.strip() for s in line.split(',')]
ids.setdefault(ID,{})
key = '%s_%s'%(COL,SHAPE)
ids[ID].setdefault(key,0)
ids[ID][key] += int(VAL)
keys.add(key)
print 'id',',',','.join([str(key) for key in keys])
for id,cols in ids.items():
print id,',', ', '.join([str(cols.get(k,0)) for k in keys])
Doesn't keep all possible keys just those that are actually used.
Needs to sort() things here and there.
Incidentally I don't think you could do it in SQL at all in this way but you
could do it in a more vertical fashion (eg
001, red, circle, 11
001, blue, square, 4
002, red, rhombus, 99) etc.
Eddie
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Problem with time
Hi, i have a problem with time in python. 1) i got 2 values from mysql db (fields are time type) 2) python get it as type 'datetime.timedelta' (why timedelta???) 3) i need to compare 2 fields with actual time ... EG: if ArrOutputsAuto[i].TimeFrom = GNow and ArrOutputsAuto[i].TimeTo = GNow: i need actual time, and 2 fields from DB in datetime.time type (correct me if i'm wrong) so i can do my test if time= ... I think i can grab time from DB in string and parse it in datetime.time(x,x,x) but its not very optimized Any idea ? Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: ZSI, SOAP and .NET web services - problem
I tried to use different library - SOAPpy, but I couldn't. It requires fpconst library which cannot be installed because its server does not respond at all. What a shit... I concur! When I tried to use ZSI the first time, it turned out it has no support for attachments. Next time I it turned out that it requires PyXML, which has no support and cannot be installed for Window + Python 2.5. Then I needed to use WSSE login, and then I wanted to authenticate with x509. Too many problems. SOAP support for Python is bad indeed. Why nobody wants to add SOAP to standard Python library? XML-RPC was added and it works without any problems Unfortunately, cursing won't help. It would be the best to join the ZSI group - it is where we can help. However, it is an interesting question. Ruby has smaller community, how could they implement a standard SOAP lib? My personal opinion is that SOAP is a piece of shit itself. It is hampered from the beginning. If you are interested why, read this: http://wanderingbarque.com/nonintersecting/2006/11/15/the-s-stands-for-simple/ XML-RPC is a fantastic, often undervalued protocol. You can create a new, secure XML-RPC server in Python within 5 minutes. You can write a client for it within one minue. It is REALLY simple. I'm using it continuously. In contrast, SOAP is overcomplicated and anything but simple. No one should create new web services using SOAP. We have enough problems with the existing ones. :-( Despite SOAP is even not a finished standard, big software companies are pushing the technology, can someone explain why? Is it because it only works correctly with Java and .NET? I guess the reasons are quite financial. :-( Laszlo -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing tables with beautiful soup?
DB: Thank you, that worked perfectly. -CJL -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem with time
1) i got 2 values from mysql db (fields are time type) 2) python get it as type 'datetime.timedelta' (why timedelta???) 3) i need to compare 2 fields with actual time ... EG: if ArrOutputsAuto[i].TimeFrom = GNow and ArrOutputsAuto[i].TimeTo = GNow: i need actual time, and 2 fields from DB in datetime.time type (correct me if i'm wrong) so i can do my test if time= ... I think i can grab time from DB in string and parse it in datetime.time(x,x,x) but its not very optimized Any idea ? Just a guess, really. Is it perchance a timedelta from the epoch? If so, comparison should be easy. -- http://mail.python.org/mailman/listinfo/python-list
testing
This is a test. -- http://mail.python.org/mailman/listinfo/python-list
Re: [JOB] Sr. Python Developer, Northern VA
Michael Bentley wrote: Perhaps it is different where you live, but here you can put on your resume relevant things that aren't paying jobs. Otherwise nobody would ever get their first job, right? Sure you can. But around here if one has been unemployed for a while it's nearly impossible to get hired ever again. It doesn't matter how many years programming Python one puts on the resume. Unpaid activities are just not *visible*. So HRM people keep asking questions like 'But what have you been doing?' In the end I just started my own company, and while I'm not always employed as a freelancer I can at least now say I'm running my own business. The basic problem however is that it's just not anyones business whether one has been walking through the country making pictures or doing some desk job. All that should matter is can he do the job and is he motivated. Asking a person who he *is* (resume) is not Pythonic! Especially if one never reads the output. A. -- http://mail.python.org/mailman/listinfo/python-list
Re: [JOB] Sr. Python Developer, Northern VA
On Mar 22, 2007, at 12:07 PM, Anton Vredegoor wrote: Agreed. There's now probably even room on the job market for those who don't belong to the select elite of early adopters. We might even root out the professionalist attitude and address the problem of tying people to their resumes. Perhaps it is different where you live, but here you can put on your resume relevant things that aren't paying jobs. Otherwise nobody would ever get their first job, right? -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 idea: reversing the order of chained assignments
Actually, after studying this a bit more: http://docs.python.org/ref/assignment.html I guess that makes sense. Sorry if I muddied the water for anyone else in my boat: n1 = n1.next = n2 The first thing that happens is the expression list is evaluated which is the thing on the far right, n2. That is a simple object reference which is then assigned to each of the target lists, left to right, of which there are two: n1 and n1.next. So, first, n1 is assigned the same value n2 has. Next, n1.next is assigned n2 (The object n1 refers to, which is also now n2, is assigned a new attribute, that value of which is n2). So, yeah... as Terry Reedy said: better to be explicit about what you want to happen first and not mash them together into one line. That would be... how do you say... Pythonic? (God, I feel so much better now. LOL) -- http://mail.python.org/mailman/listinfo/python-list
Re: challenge ?
alain [EMAIL PROTECTED] writes: def annotate_with_rank(my_dict): return my_annotated_dict In other words, any value a_value would become a 2-tuple (a_value,rank_of_a_value) I seek an elegant solution. Untested: def annotate_with_rank(my_dict): s = sorted( ((v,i),k) for i,(k,v) in enumerate(my_dict.iteritems())) return dict((k,v) for (v,k) in s) -- http://mail.python.org/mailman/listinfo/python-list
Re: why brackets commas in func calls can't be ommited? (maybe it could be PEP?)
Bart Willems wrote: dmitrey wrote: 1st still is shorter by 1 char; considering majority of people use space after comma number of parameters can be big it yileds foo bar baz bar2 bar3 bar4 vs foo(bar, baz, bar2, bar3, bar4) I think most readers already agree on the ambiguities part. Now, for the length of the code... I agree that in you example the first syntax yields a full /five/ spaces less than the second syntax. However, it ignores the fact that if you are creating functions with that many arguments, you are probably doing something wrong. Can't those arguments be provided as a list? I'm in danger of getting short-tempered on c.l.py for the first time in a long time. If you think that five arguments is an excessive number for a function then you live in a world of toy programs. Let's see what is shorter: foo bar baz bar2 bar3 bar4 or foo *bars Not to mention that it might (or might not) be a good idea to wrap the function in some kind of class where you can specify a whole bunch of attributes, so that you do not have to call a function with that many arguments to start with. Right, I think I have to assume that you're taking the piss. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: why brackets commas in func calls can't be ommited? (maybe it could be PEP?)
Steve Holden [EMAIL PROTECTED] writes: I agree that in you example the first syntax yields a full /five/ spaces less than the second syntax. However, it ignores the fact that if you are creating functions with that many arguments, you are probably doing something wrong. Can't those arguments be provided as a list? I'm in danger of getting short-tempered on c.l.py for the first time in a long time. If you think that five arguments is an excessive number for a function then you live in a world of toy programs. There's no need for functions of more than one argument. Even in existing Python syntax, instead of def f(a,b,c,d,e): ... you could say def f((a,b,c,d,e)): ... and receive a,b,c,d,e in a single tuple. -- http://mail.python.org/mailman/listinfo/python-list
Re: [JOB] Sr. Python Developer, Northern VA
On Mar 22, 2007, at 1:00 PM, Anton Vredegoor wrote: So HRM people keep asking questions like 'But what have you been doing?' In the end I just started my own company, and while I'm not always employed as a freelancer I can at least now say I'm running my own business. Yeah, I've decided to stay out of the statutory employee role myself -- and my resume looks fine. Or at least it looks good up until the time I made that decision ;-) I'm doing just fine with freelance work. I work when I want and I don't have to deal with people who think they can judge my ability to accomplish a goal by asking how much X do you have? (where X is some skill, language, toolkit, whatever) That how much X do you have question always made me grit my teeth. obtw, thanks for my new signature :-) -Michael --- Asking a person who he *is* ... is not Pythonic! --Anton Vredegoor -- http://mail.python.org/mailman/listinfo/python-list
[ANN] Python courses this Spring
I'll be giving a variety of Python courses this Spring. Daytime courses are for visitors and locals who need Python training in the shortest amount of time possible via consecutive workdays. Python is certainly gaining momentum as our February course filled up completely! Although I had planned on scheduling the same set to be taught in November, it is likely that these May daytime sessions are the last ones of 2007. In contrast, I'm experimenting with a *weekly evening* course in Silicon Valley designed mainly for locals. It represents a viable alternative to those who cannot take time off during the week as well as being more budget-friendly, as I am partnering with a local community college (Foothill) to offer this course. Class takes place on the main campus and you must register through the college to attend. For more information, such as cost and other course details, see the corresponding websites below. Contact me privately if you have any more questions. cheers, -wesley - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Core Python Programming, Prentice Hall, (c)2007,2001 http://corepython.com wesley.j.chun :: wescpy-at-gmail.com python training and technical consulting cyberweb.consulting : silicon valley, ca http://cyberwebconsulting.com - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - DAYTIME === - (Intensive) Introduction to Python (Mon-Wed, May 14-16) - Advanced Python Programming (Wed-Fri, May 16-18) - Advanced Python (short course; Thu-Fri, May 17-18) - Core Python (Intro+Advanced combo; Mon-Fri, May 14-18) These courses run daily 9a-5p and will take place in San Bruno right near the San Francisco International Airport at the: Staybridge Suites - San Francisco Airport 1350 Huntington Ave San Bruno, CA 94066 USA http://www.ichotelsgroup.com/h/d/sb/1/en/hd/sfobr Discounts are available for students and teachers, as well as multiple registrations from those working at the same company. For more info and registration, go to http://cyberwebconsulting.com (click on Python Training) LOCALS: free parking and 101/280/380 access, BART across the street and CalTrain down the road (San Bruno stations) VISITORS: free hotel shuttle to/from the San Francisco airport, lots of free food and wireless, 2-bedroom suites w/private baths and a common work/living area available for traveling coworkers, and of course, The City by the Bay - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - EVENING === - Intermediate Python Programming (Tues, Apr 10-Jun 26) This course will cover the same topics as the advanced course above as well as critical portions of the intensive introductory course. It will be held once a week on Tuesday evenings from 6-9:40p. Foothill College 12345 El Monte Road Los Altos Hills, CA 94022 USA (right off 280, just south of Stanford) http://www.foothill.edu/schedule/schedule.php search for CIS 68L for Spring Quarter 2007 -- http://mail.python.org/mailman/listinfo/python-list
