🌐 Mailman 3 September 2006 - Python-list - python.org

Django website
by Antal Rutz Sept. 1, 2006

Sept. 1, 2006

hi, is there something wrong with django's website (djangoproject.com) or I have problems? It looks ugly, the css files can't be found, I even cannot download the source from there. Do you know anything about them? Any mirror I can get the tarball from? Thanks -- --arutz

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Pros/Cons of Turbogears/Rails?
by kenneth.m.mcdonald＠sbcglobal.net Sept. 1, 2006

Sept. 1, 2006

First, I don't intend this to be a flame war, please. Python and Ruby are the only two languages I'd willingly work in (at least amongst common languages), and TurboGears and Rails seem roughly equivalent. I'm much more knowledgable about Python, but that's a minor issue--I've been intending to learn more Ruby anyway. Here are the pros and cons that I'm aware of and consider important: Turbogears: + SqlObject allows working with the DB tables without using SQL itself. + Likely to be faster because as far as I'm aware, Python is significantly faster. + Easy access to other libraries (such as the Python Imaging Library) that Ruby, being a relatively newer language, doesn't have equivalents to. + Built-in default SQLite makes it easier to set up? (as far as I can tell, Ruby requires MySql by default--don't know how easy this is to change.) + I find the templating system somewhat cleaner; code in py: xml namespace allows pure .html templates, instead of equivalent of .rhtml files. Ruby: + More mature system. More stable? More features? + Much better documented. This is a biggie. + Built-in Rubydoc system would make documenting the system easier. (IMHO, developers almost always underestimate the need for good documentation that is written along withe the system.) Is there a Python doc system that has received Guido's blessing yet? D'oxygen would seem an obvious choice. + Better coordination with Javascript helper code? I was initially leaning towards Rails due to maturity, but the most recent version of TurboGears seem to have fixed a lot of the "ad hoc" feeling I got from previous versions. But I'm still very much up in the air. Thanks, Ken P.S. If I wanted to provide an image by streaming the file data directly over the connection, rather than by referring to an image file, how would I do that? I'd like to build code that would allow images to be assembled into a single-file photo album (zip or bsddb file), and so can't refer to them as individual image files.

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Re: Adding sender name to email
by Tim Williams Sept. 1, 2006

Sept. 1, 2006

On 1 Sep 2006 03:26:12 -0700, gillespie.amanda(a)gmail.com <gillespie.amanda(a)gmail.com> wrote: > How do I add a Sender name to the emails sent by the following script: > > > writer = MimeWriter.MimeWriter(out) > # set up some basic headers... we put subject here > # because smtplib.sendmail expects it to be in the > # message body > # > writer.addheader("Subject", subject) > writer.addheader("MIME-Version", "1.0") > # add the line writer.addheader("From", a_sender_address) and you should also have writer.addheader("To", some_recipient_address(es)_as_a_string) The smtp sender & recipients do not relate to the sender & recipients in the email itself, Often they are the same, but they don't have to be. HTH :)

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Re: Classes referencing each other
by John Machin Sept. 1, 2006

Sept. 1, 2006

Manuel Bleichner wrote: > Hello list, > > I have searched for some time now, but no result... > I'm having the following problem: > > In a module I have a huge number of classes of the form: > > class A(object): > connected_to = [B, C] > <other attributes...> > > class B(object) > connected_to = [C] > <other attributes...> > > class C(object) > connected_to = [A] > <other attributes...> > > As you see, classes A and B reference classes that > are not yet defined when the class is being defined. > It will raise a NameError: 'B'. > > I know i could solve this by leaving out the definition > of 'connected_to' in A and attach it to the class later on by > A.connected_to = [B, C] > but I would like to avoid this, because in the module > there are about 50 classes that have to be altered from time > to time and it's just incredibly ugly if I have to look for > the attribute definitions in more than one place. So why can't you do it all in one place by A.connected_to = [B, C] B.connected_to = [C] C.connected_to = [A] ? or by a tabular method: connections = ( (A, [B, C]), (B, [C]), (C, [A]), ) for cls_from, targets in connections: # maybe insert some checking code in here ... # is X.connected_to = [X] allowed? # is Y.connected_to = [] allowed? cls_from.connected_to = targets > > Also, I would like to avoid eval(), because the references > have to be followed very often and that would cause more > CPU load and make the program code uglier :) Avoiding eval() does always seem to be a good thing :-) BTW, care to tell us what the connections mean? Applications of connected instances of the one class are of course very common, but 50 classes connected in a cyclic fashion is rather new to me ... Cheers, John

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Question about ftplib
by alper soyler Sept. 1, 2006

Sept. 1, 2006

I am trying to get '.pep' files from the ftp.genome.jp/pub/kegg/genomes/??? directories (???=directory names) with the below script. However, after downloading 121 files (I have to download 300 more), it gave me the time out error message: Traceback (most recent call last): File "ftp1.0.py", line 18, in ? for filename in ftp.nlst(): File "/usr/lib/python2.4/ftplib.py", line 448, in nlst self.retrlines(cmd, files.append) File "/usr/lib/python2.4/ftplib.py", line 396, in retrlines conn = self.transfercmd(cmd) File "/usr/lib/python2.4/ftplib.py", line 345, in transfercmd return self.ntransfercmd(cmd, rest)[0] File "/usr/lib/python2.4/ftplib.py", line 324, in ntransfercmd conn.connect(sa) File "<string>", line 1, in connect socket.error: (110, 'Connection timed out') How can I continue from the last download or is there any way to arrange the time? Script: from ftplib import FTP def handleDownload(block): file.write(block) print ".", ftp = FTP('ftp.genome.jp') print ftp.login() directory = '/pub/kegg/genomes' ftp.cwd(directory) k=0 for direct in ftp.nlst(): curdir = '%s/%s' % (directory, direct) ftp.cwd(curdir) for filename in ftp.nlst(): if not filename.endswith('.pep'): continue file = open(filename, 'wb') ftp.retrbinary('RETR %s/%s' % (curdir, filename), handleDownload) file.close() k=k+1 print ftp.close() ----- Original Message ---- From: python-list-request(a)python.org To: python-list(a)python.org Sent: Friday, September 1, 2006 1:00:05 PM Subject: Python-list Digest, Vol 36, Issue 10 Send Python-list mailing list submissions to python-list(a)python.org To subscribe or unsubscribe via the World Wide Web, visit http://mail.python.org/mailman/listinfo/python-list or, via email, send a message with subject or body 'help' to python-list-request(a)python.org You can reach the person managing the list at python-list-owner(a)python.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Python-list digest..." Today's Topics: 1. Re: python loops (stdazi) 2. Re: Classes referencing each other (Georg Brandl) 3. Re: Python style: to check or not to check args and data members (Joel Hedlund) 4. Re: Classes referencing each other (Manuel Bleichner) 5. Re: python loops (bearophileHUGS(a)lycos.com) From: "stdazi" <stdazi(a)gmail.com> Precedence: list MIME-Version: 1.0 To: python-list(a)python.org References: <NYOBGCEXSMTP21ETwCv0005d3ba(a)nyobgcexsmtp21.uswin.ad.vzwcorp.com> <mailman.10211.1157052834.27775.python-list(a)python.org> <slrnefeft1.9bt.sybrenUSE(a)schuimige.stuvel.eu> In-Reply-To: <slrnefeft1.9bt.sybrenUSE(a)schuimige.stuvel.eu> Date: 1 Sep 2006 02:34:48 -0700 Message-ID: <1157103288.783306.106850(a)p79g2000cwp.googlegroups.com> Content-Type: text/plain; charset="iso-8859-1" Subject: Re: python loops Message: 1 `range' is especially useful for iterating over long sequences ;-) for i in range(0,100000000000000) : OverflowError: range() result has too many items Sybren Stuvel wrote: > Michael.Coll-Barth(a)VerizonWireless.com enlightened us with: > > I thought the xrange was preferred? for x in xrange(length): > > True. It doesn't create the entire list, like range does. range(1000) > creates a 1000-element list. xrange(1000) just iterates through the > appropirate values. > > > The information contained in this message and any attachment may be > > proprietary, confidential, and privileged or subject to the work > > product doctrine and thus protected from disclosure. If the reader > > of this message is not the intended recipient, or an employee or > > agent responsible for delivering this message to the intended > > recipient, you are hereby notified that any dissemination, > > distribution or copying of this communication is strictly > > prohibited. If you have received this communication in error, > > please notify me immediately by replying to this message and > > deleting it and all copies and backups thereof. Thank you. > > And how are we supposed to interpret this? Copying this communication > may be prohibited, but both email and usenet messages are copied all > the time. Without that, both systems fail miserably. > > Sybren > -- > The problem with the world is stupidity. Not saying there should be a > capital punishment for stupidity, but why don't we just take the > safety labels off of everything and let the problem solve itself? > Frank Zappa Content-Transfer-Encoding: 7bit From: Georg Brandl <g.brandl-nospam(a)gmx.net> Precedence: list MIME-Version: 1.0 To: python-list(a)python.org References: <mailman.10236.1157100375.27775.python-list(a)python.org> In-Reply-To: <mailman.10236.1157100375.27775.python-list(a)python.org> Date: Fri, 01 Sep 2006 11:50:42 +0200 Message-ID: <ed8vpi$tej$1(a)news.albasani.net> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Subject: Re: Classes referencing each other Message: 2 Manuel Bleichner wrote: > Hello list, > > I have searched for some time now, but no result... > I'm having the following problem: > > In a module I have a huge number of classes of the form: > > class A(object): > connected_to = [B, C] > <other attributes...> > > class B(object) > connected_to = [C] > <other attributes...> > > class C(object) > connected_to = [A] > <other attributes...> > > As you see, classes A and B reference classes that > are not yet defined when the class is being defined. > It will raise a NameError: 'B'. > > I know i could solve this by leaving out the definition > of 'connected_to' in A and attach it to the class later on by > A.connected_to = [B, C] > but I would like to avoid this, because in the module > there are about 50 classes that have to be altered from time > to time and it's just incredibly ugly if I have to look for > the attribute definitions in more than one place. You could move all connections to a central location after the class definitions, such as class A: pass class B: pass class C: pass connections = {A: (B, C), B: (C,), C: (A,)} Georg Content-Transfer-Encoding: 7bit From: Joel Hedlund <yohell(a)ifm.liu.se> Precedence: list MIME-Version: 1.0 To: python-list(a)python.org References: <ed7q6j$9mh$1(a)news.lysator.liu.se> <44f78549$0$11377$636a55ce(a)news.free.fr> <ed8qj8$foe$1(a)news.lysator.liu.se> <44f7fc6b$0$26046$626a54ce(a)news.free.fr> In-Reply-To: <44f7fc6b$0$26046$626a54ce(a)news.free.fr> Date: Fri, 01 Sep 2006 11:52:26 +0200 Message-ID: <ed8vl3$h08$1(a)news.lysator.liu.se> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Subject: Re: Python style: to check or not to check args and data members Message: 3 > And while we're at it : please avoid top-posting. Yes, that was sloppy. Sorry. /Joel Content-Transfer-Encoding: Quoted-Printable From: "Manuel Bleichner" <manuel(a)prolink.de> Precedence: list MIME-Version: 1.0 To: python-list(a)python.org References: <mailman.10236.1157100375.27775.python-list(a)python.org> <Xns983167DE33BB3duncanbooth(a)127.0.0.1> In-Reply-To: <Xns983167DE33BB3duncanbooth(a)127.0.0.1> Date: Fri, 01 Sep 2006 11:56:07 +0200 Message-ID: <op.te61vtd858416w(a)merkur.intern.prolink.de> Content-Type: text/plain; format=flowed; delsp=yes; charset=iso-8859-15 Subject: Re: Classes referencing each other Message: 4 Thanks for your answer :) > You could use a function: > > class A(object): > @staticmethod > def connected_to(): return [B, C] > <other attributes...> I already thought about such a solution, but since my code has to be compatible with python 2.3, i would have to use the connected_to = staticmethod(connected_to) syntax, which bloats the code and makes it quite unreadable. > or just store the names of the classes and do a similar fixup once they > are > all defined: > > class A(object): > connected_to = ['B', 'C'] > <other attributes...> > > for cls in globals().values(): > if (type(cls) is type and > hasattr(cls, 'connected_to')): > cls.connected_to = [globals()[c] for c in cls.connected_to ] This solution seems good to me. It won't work for me as it is, because the structure of the classes is actually a bit more complex, but it pushed me in the right direction. Thanks again, Manuel From: bearophileHUGS(a)lycos.com Precedence: list MIME-Version: 1.0 To: python-list(a)python.org References: <1157050085.120921.31840(a)h48g2000cwc.googlegroups.com> <JcGJg.21533$ED.7604(a)read2.cgocable.net> <1157051115.635459.215920(a)p79g2000cwp.googlegroups.com> <1157051784.609953.196100(a)h48g2000cwc.googlegroups.com> In-Reply-To: <1157051784.609953.196100(a)h48g2000cwc.googlegroups.com> Date: 1 Sep 2006 02:56:59 -0700 Message-ID: <1157104618.899811.216640(a)p79g2000cwp.googlegroups.com> Content-Type: text/plain; charset="iso-8859-1" Subject: Re: python loops Message: 5 Kay Schluehr: > I hate ii ;) It's not nice looking, I agree. A more explicit name is often better. But I think ii is better than i because you can find it in the code (with the Find command of the editor or grep) more easily than i. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list

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Jython: single step / pause / debug ...
by axel Sept. 1, 2006

Sept. 1, 2006

Hello, I want to integrate Jython into my java application. But I want to control the script execution. How can be realized this? I have used TraceFunction and the script stops alway in traceCall(). But (1) I have never seen what I have to return there, (2) only this function is called - also if there is an error in the script and (3) what I have to do to pause/stop the script? Thanks, Axel

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Adding sender name to email
by gillespie.amanda＠gmail.com Sept. 1, 2006

Sept. 1, 2006

How do I add a Sender name to the emails sent by the following script: def createhtmlmail (html, text, subject): """Create a mime-message that will render HTML in popular MUAs, text in better ones""" import MimeWriter import mimetools import cStringIO out = cStringIO.StringIO() # output buffer for our message htmlin = cStringIO.StringIO(html) txtin = cStringIO.StringIO(text) writer = MimeWriter.MimeWriter(out) # set up some basic headers... we put subject here # because smtplib.sendmail expects it to be in the # message body # writer.addheader("Subject", subject) writer.addheader("MIME-Version", "1.0") # # start the multipart section of the message # multipart/alternative seems to work better # on some MUAs than multipart/mixed # writer.startmultipartbody("alternative") writer.flushheaders() # # the plain text section # subpart = writer.nextpart() subpart.addheader("Content-Transfer-Encoding", "quoted-printable") pout = subpart.startbody("text/plain", [("charset", 'us-ascii')]) mimetools.encode(txtin, pout, 'quoted-printable') txtin.close() # # start the html subpart of the message # subpart = writer.nextpart() subpart.addheader("Content-Transfer-Encoding", "quoted-printable") # # returns us a file-ish object we can write to # pout = subpart.startbody("text/html", [("charset", 'us-ascii')]) mimetools.encode(htmlin, pout, 'quoted-printable') htmlin.close() # # Now that we're done, close our writer and # return the message body # writer.lastpart() msg = out.getvalue() out.close() return msg if __name__=="__main__": import smtplib from time import * f = open("mssg.html", 'r') html = f.read() f.close() f = open("mssg.txt", 'r') text = f.read() f.close() subject = "subject)" f = open("temp.txt", 'r') RECIPIENTS = [] for line in f: RECIPIENTS.append(line.strip()) f.close() for i in RECIPIENTS: if len(i) == 0: RECIPIENTS.remove(i) print "Number of recipients: ", len(RECIPIENTS) SENDER = 'mail(a)mail.com' print "Generating message..." mssg = createhtmlmail(html, text, subject) print "Opening session" session = smtplib.SMTP("localhost") print "Sending email" offset = 0 blocksize = 20 # to send emails in blocks of 20, so I don't bomb out my server while offset*blocksize < len(RECIPIENTS): print "Sending message ", offset*blocksize, " - ", (offset+1)*blocksize, "of ", len(RECIPIENTS), "..." smtpresult = session.sendmail(SENDER,RECIPIENTS[offset*blocksize:(offset+1)*blocksize],mssg) sleep(30) offset += 1 ## smtpresult = session.sendmail(SENDER, RECIPIENTS, mssg) if smtpresult: errstr = "" for recip in smtpresult.keys(): errstr = """Could not delivery mail to: %s Server said: %s %s %s""" % (recip, smtpresult[recip][0], smtpresult[recip][1], errstr) raise smtplib.SMTPException, errstr session.quit()

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Re: Classes referencing each other
by Georg Brandl Sept. 1, 2006

Sept. 1, 2006

Manuel Bleichner wrote: > Hello list, > > I have searched for some time now, but no result... > I'm having the following problem: > > In a module I have a huge number of classes of the form: > > class A(object): > connected_to = [B, C] > <other attributes...> > > class B(object) > connected_to = [C] > <other attributes...> > > class C(object) > connected_to = [A] > <other attributes...> > > As you see, classes A and B reference classes that > are not yet defined when the class is being defined. > It will raise a NameError: 'B'. > > I know i could solve this by leaving out the definition > of 'connected_to' in A and attach it to the class later on by > A.connected_to = [B, C] > but I would like to avoid this, because in the module > there are about 50 classes that have to be altered from time > to time and it's just incredibly ugly if I have to look for > the attribute definitions in more than one place. You could move all connections to a central location after the class definitions, such as class A: pass class B: pass class C: pass connections = {A: (B, C), B: (C,), C: (A,)} Georg

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RE: python loops
by Michael.Coll-Barth＠VerizonWireless.com Sept. 1, 2006

Sept. 1, 2006

> -----Original Message----- > From: Kay Schluehr > > > > > python: > > while i < length: > > i += 1 > > As AlbaClause had demonstrated you can iterate over indices as well > using the for-statement and the range() function. But you can also > combine iterating over elements and indices at the same time using the > builtin enumerate() type: > > for i, item in enumerate(("s1","s2")): > print i,item > > 0 s1 > 1 s2 Newbie here. I thought the xrange was preferred? for x in xrange(length): But, I thought that was too obvious an answer and I was missing something. I tried your code but it would not work. Then I realized I was behind the times with python2.2 It works in, at least, python 2.4 The information contained in this message and any attachment may be proprietary, confidential, and privileged or subject to the work product doctrine and thus protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me immediately by replying to this message and deleting it and all copies and backups thereof. Thank you.

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Re: Classes referencing each other
by Duncan Booth Sept. 1, 2006

Sept. 1, 2006

"Manuel Bleichner" <manuel(a)prolink.de> wrote: > If anyone of you knows a neat way to solve this, I'd be > very grateful. You could use a function: class A(object): @staticmethod def connected_to(): return [B, C] <other attributes...> class B(object) @staticmethod def connected_to(): return [C] <other attributes...> class C(object) @staticmethod def connected_to(): return [A] <other attributes...> for cls in globals().values(): if (type(cls) is type and hasattr(cls, 'connected_to') and callable(cls.connected_to)): cls.connected_to = cls.connected_to() or just store the names of the classes and do a similar fixup once they are all defined: class A(object): connected_to = ['B', 'C'] <other attributes...> for cls in globals().values(): if (type(cls) is type and hasattr(cls, 'connected_to')): cls.connected_to = [globals()[c] for c in cls.connected_to ]

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