🌐 Mailman 3 August 2007 - Python-list - python.org

Re: Wing IDE for Python v. 3.0 beta1 released
by sdeibel＠gmail.com Aug. 2, 2007

Aug. 2, 2007

On Aug 1, 6:42 pm, John K Masters <johnmast...(a)oxtedonline.net> wrote: > To suggest that, because the autocompletion worked on one method of a > module and not on another was because I had not configured the > PYTHONPATH properly is at least insulting. We certainly didn't intend to be insulting. This it the most common cause of auto-completion problems but you are right that it's a mis-diagnosis on our part if it was just one method. We respond to sometimes hundreds of emails a day ,so we do make mistakes. It may be solved by using Reanalyze File from the right-click context menu on the editor but there's no gaurantee. This is incredibly complex code with many layers of highly optimized tokenizing, analysis, inference, caching, and then display in the various tools in Wing so it often takes a bit more time to find where the bug is. By the way, Wing 3.0 beta1 fixes a number of bugs that would lead to bad analysis, including missing methods as a result of failure to track edits in a file properly. It also improves reading completion info out of extension modules and properly handles several forms of import where it fell on its face previously. Hope that's useful... please let me know if not. - Stephan

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Re: standalone process to interact with the web
by beginner Aug. 2, 2007

Aug. 2, 2007

On Jul 31, 1:11 pm, Steve Holden <st...(a)holdenweb.com> wrote: > beginner wrote: > > Hi Steve, > > > On Jul 31, 11:42 am, Steve Holden <st...(a)holdenweb.com> wrote: > >> beginner wrote: > >>> Hi Everyone, > >>> I am looking for a way to allow a standalone python process to easily > >>> interactive with a few web pages. It has to be able to easily receive > >>> requests from the web and post data to the web. > >>> I am thinking about implementing a standalone soap server, but I am > >>> not sure which library is good. > >>> Any suggestions? > >>> Thanks a lot, > >>> Geoffrey > >> Look nor further than mechanize - > > >> http://wwwsearch.sourceforge.net/mechanize/ > > >> With mechanize and its partner ClientForm you can rule the web world ;-) > > >> regards > >> Steve > >> -- > >> Steve Holden +1 571 484 6266 +1 800 494 3119 > >> Holden Web LLC/Ltd http://www.holdenweb.com > >> Skype: holdenweb http://del.icio.us/steve.holden > >> --------------- Asciimercial ------------------ > >> Get on the web: Blog, lens and tag the Internet > >> Many services currently offer free registration > >> ----------- Thank You for Reading ------------- > > > This seems to be an HTTP client library. It is very interesting, but > > is not what I need. I am looking for something that can provide > > service to web pages. For example, when a browser requests a web page, > > the web page is going to send a few requests to my server. My server > > then is going to respond, and the web page takes the response and > > format it in human readable form. > > Well, surely in that case you can use any protocol you like. It's up to > the web server and your "web server server" to agree how to communicate. > Take a look at the SocketServer library, for example. > > regartds > Steve > -- > Steve Holden +1 571 484 6266 +1 800 494 3119 > Holden Web LLC/Ltd http://www.holdenweb.com > Skype: holdenweb http://del.icio.us/steve.holden > --------------- Asciimercial ------------------ > Get on the web: Blog, lens and tag the Internet > Many services currently offer free registration > ----------- Thank You for Reading -------------- Hide quoted text - > > - Show quoted text - Yes exactly. I just don't want to reinvent the wheel as I imagine there are already tons of libraries and frameworks that support RPC or the like functions. Thanks, Geoffrey

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a dict trick
by james_027 Aug. 2, 2007

Aug. 2, 2007

hi for example I have this dictionary dict = {'name':'james', 'language':'english'} value = 'sex' in dict and dict['sex'] or 'unknown' is a right pythonic of doing this one? I am trying to get a value from the dict, but if the key doesn't exist I will provide one. THanks james

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wxpython with python 2.5
by G Aug. 2, 2007

Aug. 2, 2007

Hello, I am trying to get wxpython to run with python 2.5 without any success. wx works prefectly in python 2.4. below is the error code i get when i try to run the code. File "demo.py", line 3, in <module> import Main File "/tmp/wxPython/Main.py", line 32, in <module> import wx # This module uses the new wx namespace ImportError: No module named wx Any help in getting wxpython to run in 2.5 would be greatly appreciated.

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beginner in python
by Beema shafreen Aug. 2, 2007

Aug. 2, 2007

hi everybody, I am beginner in python I have to calculate the euclidean distance between the atoms from a pdb file i have written the the code and its shows me some error , the code: import re import string import math ab =[] x_value = [] y_value = [] z_value = [] fh = open("1K5N.pdb",'r') for atom in fh.readlines(): a = atom.strip() pattern= re.compile('^ATOM.*') atom_file= pattern.search(a) if atom_file: atom_data = atom_file.group() x_coordinate = atom_data[31:38] y_coordinate = atom_data[39:46] z_coordinate = atom_data[47:54] x_value.append(x_coordinate) y_value.append(y_coordinate) z_value.append(z_coordinate) for x in range(len(x_value)): x_co = float(x_value[x])-float(x_value[x+1]) y_co = float(y_value[x])-float(y_value[x+1]) z_co = float(z_value[x])-float(z_value[x+1]) data = math.sqrt(x_co)*(x_co)+(y_co)*(y_co)+(z_co)*(z_co) print data ~ and the error ,message File "pdb_fetching.py", line 22, in ? x_co = float(x_value[x])-float(x_value[x+1]) IndexError: list index out of range can you suggest me the mistake i have made regards shafreen

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Error subclassing datetime.date and pickling
by Mike Rooney Aug. 2, 2007

Aug. 2, 2007

Hi everyone, this is my first post to this list. I am trying to create a subclass of datetime.date and pickle it, but I get errors on loading it back. I have created a VERY simple demo of this: import datetime class MyDate(datetime.date): """ This should be pickleable. >>> md = MyDate(2007, 1, 6) >>> import pickle >>> pickle.dump(md, open("test.pickle", 'w')) >>> mdp = pickle.load(open("test.pickle")) >>> import os; os.remove("test.pickle") """ def __init__(self, y, m, d): datetime.date.__init__(self, y, m, d) if __name__ == "__main__": import doctest doctest.testmod() The traceback that occurs is: Traceback (most recent call last): File "C:\Python25\lib\doctest.py", line 1212, in __run compileflags, 1) in test.globs File "<doctest __main__.MyDate[3]>", line 1, in <module> mdp = pickle.load(open("test.pickle")) File "C:\Python25\lib\pickle.py", line 1370, in load return Unpickler(file).load() File "C:\Python25\lib\pickle.py", line 858, in load dispatch[key](self) File "C:\Python25\lib\pickle.py", line 1133, in load_red value = func(*args) TypeError: __init__() takes exactly 4 arguments (2 given) I have found a few relating issues: - https://sourceforge.net/tracker/?func=detail&atid=105470&aid=952807&group_i… - http://sourceforge.net/tracker/index.php?func=detail&aid=720908&group_id=54… But these are both rather old and are marked as fixed. I am running Python 2.5.1 on Windows XP SP2. Any help here would be greatly appreciated! - Mike

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Cross compiling 2.5.1
by winkatl1213＠yahoo.com Aug. 2, 2007

Aug. 2, 2007

I was wondering if anyone could help me with cross-compiling Python 2.5.1 to a MIPS target. The approach I'm using is based off the suggestion in the README file that comes with the python source distribution. I managed to get the configure script to run using the following command line: $ ../Python-2.5.1/configure --host=mips-linux --enable-shared Next I run make and it builds the python interpreter and shared library. However, it then attempts to run the interpreter to complete the rest of the build process, and that of coarse fails. I read several posts on the internet from people who applied patches to the python source to enable cross-compling, but my impression was that 2.5.1 had merged some of this work. Can anyone give me some suggestions on how I get the makery to use the build interpreter instead of the host interpreter to complete the build process? Thanks in advance for any suggestions. Jeff

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Re: beginner in python
by Tim Williams Aug. 2, 2007

Aug. 2, 2007

On 02/08/07, Beema shafreen <beema.shafreen(a)gmail.com> wrote: > Hi everybody , > I am a beginner in python, > I have to fetch the redundant entries from a file, > > code: > > import re > L = [] > fh = open('ARCHITECTURE_MAIN.txt', > 'r') > for line in fh.readlines(): > data =line.strip() > # splitted = data.split('#') > L.append(data) > fh.close() > > > > M=L > for x in L: > x = x.split('#') > for y in M: > y = y.split('#') > x_data = x[0],x[1],x[2],x[3] > #print x_data > y_data = y[0],y[1],y[2],y[3] > #print y_dat > if x_data[0] == y_data[0]: > print x_data > > > i get the result as a tupule, > the text file which has datas separated by hash > entry#isoform#start#stop# i have to check upto this > > 00250_1#ARCH_104#61#89#Literature#9224948#00250#### > 00250_1#ARCH_104#97#126#Literature#9224948#00250#### > 00250_1#ARCH_104#139#186#Literature#9224948#00250#### > 00251_1#ARCH_463#7#59#SMART##00251#### > 00251_1#ARCH_463#91#121#SMART##00251#### > 00251_1#ARCH_463#251#414#SMART##00251#### > 00251_1#ARCH_463#540#624#SMART##00251#### > 00252_1#ARCH_474#1#21#Literature#8136357#00252#### > 00252_1#ARCH_393#481#501#Literature#8136357#00252#### > 00252_1#ARCH_463#523#553#SMART##00252#### > 00253_1#ARCH_82#37#362#SMART##00253#### > 00253_1#ARCH_54#365#522#SMART##00253#### > 00253_1#ARCH_104#589#617#SMART##00253#### > 00253_1#ARCH_104#619#647#SMART##00253#### > 00253_1#ARCH_104#684#712#SMART##00253#### > 00254_1#ARCH_82#27#352#SMART##00254#### > 00254_1#ARCH_54#355#510#SMART##00254#### > 00254_1#ARCH_104#576#604#SMART##00254#### > 00254_1#ARCH_104#606#634#SMART##00254#### > 00254_1#ARCH_104#671#699#SMART##00254#### > 00255_1#ARCH_82#56#425#SMART##00255#### > 00255_1#ARCH_54#428#582#SMART##00255#### > 00255_1#ARCH_104#696#724#SMART##00255#### > > > > > can you suggest me ,what are the improvement i have to make in the above > code > regards > shafreen Shafreen, your code snippet (as you posted it) prints any lines that end with an entry code equal the entry code on the last line of the file, with these lines split at #. The whole thing (as you posted it) could probably be written something like this: =================== # not tested or optimised fh = open('ARCHITECTURE_MAIN.txt').read().splitlines() last_code = fh[-1].split('#')[0] for line in fh: if out_line.startswith(last_code): print out_line.split('#') # it will always print at least the last line of the file =================== HTH :)

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Re: sending very large packets over the network
by Azazello Aug. 2, 2007

Aug. 2, 2007

On Aug 1, 8:50 pm, Gary Herron <gher...(a)islandtraining.com> wrote: > Walker Lindley wrote: > > OK, I'm back with another networking question. I'm trying to seend > > large amounts of information over TCP (the length of data being given > > to send() is on the order of 16000 characters in length). > > Unfortunately on the receiving end, the packets appear to be > > truncated. So I wrote some code that continuously tries to send bigger > > and bigger packets until it fails and noticed that it never fails at > > the same length. I'm not even sure these two things are related, but > > is there some undocumented (or documented and I missed it) maximum > > size for data you can pass to send()? > > For ethernet connections the size is often about 1500. But the size > depends on the underlying protocol, and even if you know the underlying > protocol along the full route, you can't rely on packets that are > received being the same as those that are sent. > > TCP/IP is a *stream* connection. What you are guaranteed is this: All > the bytes that are sent from one end will be received eventually on the > other end, in the proper order. (Or failing that, you will receive an > error notification.) No guarantee is made about the packet sizes on > either end, and you can't even rely on the packets being the same in > number or length on the two ends. > > Your send code can try sending a packet of any size, but it must be > prepared to examine the number of bytes actually sent, and retry with > the remainder in a loop until all bytes are sent. Similarly your > receiving code must loop around the receive accepting whatever sized > packets makes it through the connection. > > In many TCP/IP connections, it seems that the packets received are > one-for-one with the packets sent, but relying on this *IS AN ERROR* > that will bite you. It fails to across the internet (sometimes) and > when (at least some) wireless cards are involved. > > You may be better off using a package that knows all this and handles it > properly. Modules asyncore and asynchat are one possibility. > > Gary Herron > > > > > > > the sample code is as follows > > #server > > import socket > > > s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) > > s.bind(("", 2000)) > > s.listen(0) > > sock, addrinfo = s.accept() > > for i in range(2 ** 16): > > length = int(sock.recv(16)) > > print "excpecting data of length:", length > > data = sock.recv(length) > > print "received data of length:", len(data) > > print > > s.close() > > sock.close() > > > #client > > import socket > > import time > > > s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) > > s.bind(("", 2001)) > > s.connect(("localhost", 2000)) > > for i in range(2 ** 16): > > packet = "h" * i > > s.send("%16d" % len(packet)) > > print "attempting to send data of length:", len(packet) > > tmp = s.send(packet) > > print "actually sent data of length:", tmp > > print > > time.sleep(.001) > > s.close() > > > i just put them in different files and ran them from the command line. > > Any help or suggestions would be greatly appreciated. Thanks. > > > -Walker > > > -- > > This e-mail is licensed under the Creative Commons > > Attribution-NoDerivs 2.5 License. To view a copy of this license, > > visithttp://creativecommons.org/licenses/by-nd/2.5/or send a letter > > to Creative Commons, 543 Howard Street, 5th Floor, San Francisco, > > California, 94105, USA.- Hide quoted text - > > - Show quoted text - I'm not an expert on networking so take my advice with a grain of salt! My guess is that you're encountering race-like conditions between the send and recv. commmands because you're running your communication command 2^16 times, hoping that send and recv. are synchronous on every step. This is especially true when you're running other commands in your data sending loops! Prints take quite a lot of time. Also, the send command in C (i'm not sure if this is true in python) does not guarantee that all of your data gets out. I'm assuming that you're somewhat new to networking so I would recommend shying away from running an Asynchronous polling server. Although it is probably a better way to do this. My suggestions: Write a while loop in the server with some end of stream checking, timeouts, et cetera. This will give you a bit of flexibility and feedback when things go to pot. Use the sendall() command in your client because it throws an exception if data isn't properly sent. and will eliminate a unsightly for loop. Client socket.sendall(data) Something akin to this old piece of test code datastream = '' ## A timeout exception is thrown if the receiver is waiting on the line for .25 seconds socket.settimeout(.25) while 1: try: buf = socket.recv(1024) ## If data on line put in buffer except socket.timeout: ## Data buffer timeout, breaks while loop break if buf == '': ## If an empty buffer, jump to top of loop (beginning of file check) continue datastream = datastream + str(buf) if not len(buf) == 1024: ## If the buffer is not full break signaling end of file. break Hope this helps! And like i said i'm pretty new to this so be careful! Foundations of Network Programming by John Goerzen is a great book if you want some good information on the topic. Tyler

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Bug in Time module, or in my understanding?
by Joshua J. Kugler Aug. 2, 2007

Aug. 2, 2007

I am getting results like these with the time module: >>> import time >>> int(time.mktime(time.strptime('2007-03-11 02:00:00', '%Y-%m-%d %H:%M %S'))) 1173610800 >>> int(time.mktime(time.strptime('2007-03-11 03:00:00', '%Y-%m-%d %H:%M %S'))) 1173610800 >>> time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1173610800)) '2007-03-11 03:00:00' I know it probably has something to do with daylight savings, but how can I get back out that which I put in? The times concerned are all standard time, so how can I keep the time module from asserting its belief that I want to convert to daylight savings? Incidentally, it only happens with times on 2007-03-11 from 02:00:00 to 02:59:59, and not with time data from past years. Thanks for any pointers! j -- Joshua Kugler Lead System Admin -- Senior Programmer http://www.eeinternet.com PGP Key: http://pgp.mit.edu/ ID 0xDB26D7CE

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