Re: Python+Expect+Win32 = Not Possible?
On Sep 12, 9:27 pm, gamename [EMAIL PROTECTED] wrote: Hi, Is it still the case there is no practical Expect-like module for win32? I know that cygwin can support pexpect, but that isn't an option here --- I have to use a native win32 Python version. Are there alternatives, or is it simply not an option to replicate Expect on win32 with python? All I'm trying to do is start a couple processes, wait for each to say done on stdout and then quit (or timeout if something went wrong). TIA, -T I had planned on using telnet to do the same thing on windows. I don't think I ever proved it, but I'm pretty sure it will work. http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52228 ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a simple way to exit a while loop on keystroke?
On Aug 31, 11:11 am, gsxg [EMAIL PROTECTED] wrote: Thanks, The curses library doesn't look to helpful to me. However using CTRL- C is fine and is working nicely. BTW, it should be time.sleep(1) in the example above, instead of just sleep(1) (Just in case any other newbies like me read this) Thanks again Depends on how you import 'time' import time time.sleep(1) from time import sleep sleep(1) ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question - sorting a slice
On Aug 28, 7:43 pm, hwg [EMAIL PROTECTED] wrote: I've searched the group and didn't see the answer to this... Why doesn't this work?: letters = ['d', 'a', 'e', 'c', 'b'] letters[1:3].sort() This returns None. Why? letters[1:3] is ['a', 'e', 'c']Sorting that should return ['a', 'c', 'e'] hwg sort() works on a list in place, and returns none You have to make a temp list. note... letters = ['d', 'a', 'e', 'c', 'b'] print letters.sort() None print letters ['a', 'b', 'c', 'd', 'e'] ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Socket - gaierror
Hi all, I'm having trouble with the socket module resolving a hostname. It seems like this is a system level problem, but I'm not even sure where to start. I can ping the smtp server by name and IP, but when smtp.SMTP(theHost) tries to get the hostname, it keeps giving me the following error: File bin/program.py, line 123, in notify smtp = smtplib.SMTP(theHost) File /usr/lib/python2.4/smtplib.py, line 255, in __init__ addr = socket.gethostbyname(socket.gethostname()) gaierror: (-2, 'Name or service not known') I tried changing to a different smtp server, using an ip instead of a host name. I could ping both boxes by name oor IP. any ideas? ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Socket - gaierror
On Aug 27, 12:32 pm, Larry Bates [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: Hi all, I'm having trouble with the socket module resolving a hostname. It seems like this is a system level problem, but I'm not even sure where to start. I can ping the smtp server by name and IP, but when smtp.SMTP(theHost) tries to get the hostname, it keeps giving me the following error: File bin/program.py, line 123, in notify smtp = smtplib.SMTP(theHost) File /usr/lib/python2.4/smtplib.py, line 255, in __init__ addr = socket.gethostbyname(socket.gethostname()) gaierror: (-2, 'Name or service not known') I tried changing to a different smtp server, using an ip instead of a host name. I could ping both boxes by name oor IP. any ideas? ~Sean The specific error shown is a DNS resolution problem. Based on the URL theHost smtplib can't resolve to an IP address (which is what socket.gethostbyname does). You don't say what happened when you changed to ip, but I suspect it is a different error or some other problem. Maybe a firewall issue (port 25 not open?), but I'm just guessing. -Larry Changing it to IP gives me the same exact error... File bin/prgram.py, line 123, in notify smtp = smtplib.SMTP(XXX.XXX.XXX.XXX) File /usr/lib/python2.4/smtplib.py, line 255, in __init__ addr = socket.gethostbyname(socket.gethostname()) gaierror: (-2, 'Name or service not known') Looks like the smtp port is closed on the client machine...doh Should have gotten to that! Thank you. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Socket - gaierror
On Aug 27, 12:47 pm, [EMAIL PROTECTED] wrote: On Aug 27, 12:32 pm, Larry Bates [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: Hi all, I'm having trouble with the socket module resolving a hostname. It seems like this is a system level problem, but I'm not even sure where to start. I can ping the smtp server by name and IP, but when smtp.SMTP(theHost) tries to get the hostname, it keeps giving me the following error: File bin/program.py, line 123, in notify smtp = smtplib.SMTP(theHost) File /usr/lib/python2.4/smtplib.py, line 255, in __init__ addr = socket.gethostbyname(socket.gethostname()) gaierror: (-2, 'Name or service not known') I tried changing to a different smtp server, using an ip instead of a host name. I could ping both boxes by name oor IP. any ideas? ~Sean The specific error shown is a DNS resolution problem. Based on the URL theHost smtplib can't resolve to an IP address (which is what socket.gethostbyname does). You don't say what happened when you changed to ip, but I suspect it is a different error or some other problem. Maybe a firewall issue (port 25 not open?), but I'm just guessing. -Larry Changing it to IP gives me the same exact error... File bin/prgram.py, line 123, in notify smtp = smtplib.SMTP(XXX.XXX.XXX.XXX) File /usr/lib/python2.4/smtplib.py, line 255, in __init__ addr = socket.gethostbyname(socket.gethostname()) gaierror: (-2, 'Name or service not known') Looks like the smtp port is closed on the client machine...doh Should have gotten to that! Thank you. ~Sean I take it back, that wasn't the solution. I got it to work by haacking smtplib with a static host instead of the socket.gethostbyname(socket.gethostname()) call...but if I leave that in there I might get shot one day. What could cause the shell to be able to resolve the addresses properly, but not python? nnsswitch.conf ? I don't know enough about what's going on in the background. Any other ideas? Or should I try this on a unix board? ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Socket - gaierror
On Aug 27, 4:22 pm, [EMAIL PROTECTED] (Douglas Wells) wrote: In article [EMAIL PROTECTED], [EMAIL PROTECTED] writes: On Aug 27, 12:32 pm, Larry Bates [EMAIL PROTECTED] wrote: Changing it to IP gives me the same exact error... File bin/prgram.py, line 123, in notify smtp = smtplib.SMTP(XXX.XXX.XXX.XXX) File /usr/lib/python2.4/smtplib.py, line 255, in __init__ addr = socket.gethostbyname(socket.gethostname()) gaierror: (-2, 'Name or service not known') Looks like the smtp port is closed on the client machine...doh Should have gotten to that! ~Sean Note that the lookup is of your *local* system name (socket.gethostname()). I suspect that the name of your client system (the one running the python script) is not registered in DNS. Try ping'ing your own system and see if that resolves in DNS. In UNIX/Linux you can use the hostname command; in any system you can write a python script to print the result of socket.gethostname(). - dmw -- . Douglas Wells . Connection Technologies . . Internet: -sp9804- -at - contek.com- . I found a solution...but still not sure why that happened. [EMAIL PROTECTED]:17:08:5E:EF:0F:/usr/local/sw/program/bin# hostname 00:17:08:5E:EF:0F [EMAIL PROTECTED]:17:08:5E:EF:0F:/usr/local/sw/program/bin# ping 00:17:08:5E:EF: 0F ping: unknown host 00:17:08:5E:EF:0F socket.gethostname() '00:17:08:5E:EF:0F' Workaround: pass the 'local_hostname' arg to the smtplib.SMTP() call with localhost ie smtp.SMTP(some.computer, local_hostname=localhost) This is just overriding the socket.gethostname() call entirely. Did a bit of testing with the /etc/hosts file, and even with an entry to the hostname it can't resolve the ip. The problem is the name 00:17:08:5E:EF:0F PS. I didn't choose to set the hostname that way. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: moving files in a seperate thread (and/or with progress?)
On Aug 15, 2:28 am, Jorgen Bodde [EMAIL PROTECTED] wrote: Hi all, I want to make a small batch copy tool that scans for certain files, and copies them to a specified directory. Since the files are huge (AVI / DIVX) typical 300 to 700 Mb, I want to provide the user with some feedback during the file copy. Here is my dillemma; When I use shutil.move(..,..) I have to wait until it's done, there is no feedback, so the GUI basically hangs. However, shutil.move can be fast because it intelligently renames the file when it is on the same medium, but slow when it moves to a different one. When I use my own implementation of a move mechanism that provides feedback, I lose that intelligence, and I might slow down the copy process unneccessarily. When I move files, feedback is handy to have, but not neccesary so I thought I can also call shutil.move from a seperate thread so the main GUI stays responsive. What are my options in aborting a move by killing the thread or are there other (3rdparty) modules I might use to get better move or copy performances? Just opening the file, performing a block copy myself seems like it will slow down the transfer, but up until now I found no way to move or copy with progress or abilities to abort the file transfer.. Any ideas? Regards, - Jorgen The following link helped me to pull it off with Tkinter. A complicated example, but very well written. http://uucode.com/texts/pylongopgui/pyguiapp.html ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Threaded Design Question
On Aug 9, 9:45 pm, Mark T [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi all! I'm implementing one of my first multithreaded apps, and have gotten to a point where I think I'm going off track from a standard idiom. Wondering if anyone can point me in the right direction. The script will run as a daemon and watch a given directory for new files. Once it determines that a file has finished moving into the watch folder, it will kick off a process on one of the files. Several of these could be running at any given time up to a max number of threads. Here's how I have it designed so far. The main thread starts a Watch(threading.Thread) class that loops and searches a directory for files. It has been passed a Queue.Queue() object (watch_queue), and as it finds new files in the watch folder, it adds the file name to the queue. The main thread then grabs an item off the watch_queue, and kicks off processing on that file using another class Worker(threading.thread). My problem is with communicating between the threads as to which files are currently processing, or are already present in the watch_queue so that the Watch thread does not continuously add unneeded files to the watch_queue to be processed. For example...Watch() finds a file to be processed and adds it to the queue. The main thread sees the file on the queue and pops it off and begins processing. Now the file has been removed from the watch_queue, and Watch() thread has no way of knowing that the other Worker() thread is processing it, and shouldn't pick it up again. So it will see the file as new and add it to the queue again. PS.. The file is deleted from the watch folder after it has finished processing, so that's how i'll know which files to process in the long term. I made definite progress by creating two queues...watch_queue and processing_queue, and then used lists within the classes to store the state of which files are processing/watched. I think I could pull it off, but it has got very confusing quickly, trying to keep each thread's list and the queue always in sync with one another. The easiset solution I can see is if my threads could read an item from the queue without removing it from the queue and only remove it when I tell it to. Then the Watch() thread could then just follow what items are on the watch_queue to know what files to add, and then the Worker() thread could intentionally remove the item from the watch_queue once it has finished processing it. Now that I'm writing this out, I see a solution by over-riding or wrapping Queue.Queue().get() to give me the behavior I mention above. I've noticed .join() and .task_done(), but I'm not sure of how to use them properly. Any suggestions would be greatly appreciated. ~Sean Just rename the file. We've used that technique in a similar application at my work for years where a service looks for files of a particular extension to appear in a directory. When the service sees a file, in renames it to a different extension and spins off a thread to process the contents. -Mark T. I ended up taking this route for the most part. The worker thread first moves the file to be processed into a temp directory, and the watch thread never knows about it again. I still had to implement my StateQueue(Queue.Queue) so I could implement a function to return all the items on the queue without popping them off. Thanks all for your great ideas. My current response to multi- threading... PITA! ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Threaded Design Question
Hi all! I'm implementing one of my first multithreaded apps, and have gotten to a point where I think I'm going off track from a standard idiom. Wondering if anyone can point me in the right direction. The script will run as a daemon and watch a given directory for new files. Once it determines that a file has finished moving into the watch folder, it will kick off a process on one of the files. Several of these could be running at any given time up to a max number of threads. Here's how I have it designed so far. The main thread starts a Watch(threading.Thread) class that loops and searches a directory for files. It has been passed a Queue.Queue() object (watch_queue), and as it finds new files in the watch folder, it adds the file name to the queue. The main thread then grabs an item off the watch_queue, and kicks off processing on that file using another class Worker(threading.thread). My problem is with communicating between the threads as to which files are currently processing, or are already present in the watch_queue so that the Watch thread does not continuously add unneeded files to the watch_queue to be processed. For example...Watch() finds a file to be processed and adds it to the queue. The main thread sees the file on the queue and pops it off and begins processing. Now the file has been removed from the watch_queue, and Watch() thread has no way of knowing that the other Worker() thread is processing it, and shouldn't pick it up again. So it will see the file as new and add it to the queue again. PS.. The file is deleted from the watch folder after it has finished processing, so that's how i'll know which files to process in the long term. I made definite progress by creating two queues...watch_queue and processing_queue, and then used lists within the classes to store the state of which files are processing/watched. I think I could pull it off, but it has got very confusing quickly, trying to keep each thread's list and the queue always in sync with one another. The easiset solution I can see is if my threads could read an item from the queue without removing it from the queue and only remove it when I tell it to. Then the Watch() thread could then just follow what items are on the watch_queue to know what files to add, and then the Worker() thread could intentionally remove the item from the watch_queue once it has finished processing it. Now that I'm writing this out, I see a solution by over-riding or wrapping Queue.Queue().get() to give me the behavior I mention above. I've noticed .join() and .task_done(), but I'm not sure of how to use them properly. Any suggestions would be greatly appreciated. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: tempfile behavior
On Aug 9, 11:21 am, billiejoex [EMAIL PROTECTED] wrote: Hi all, I would like to use tempfile module to generate files having unique names excepting that I don't want them to be removed after closing. Does it is possible? Looks like tempfile.mkstemp() will do what you want. '''Unlike TemporaryFile(), the user of mkstemp() is responsible for deleting the temporary file when done with it.''' ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Threaded Design Question
On Aug 9, 12:09 pm, Justin T. [EMAIL PROTECTED] wrote: On Aug 9, 11:25 am, [EMAIL PROTECTED] wrote: Here's how I have it designed so far. The main thread starts a Watch(threading.Thread) class that loops and searches a directory for files. It has been passed a Queue.Queue() object (watch_queue), and as it finds new files in the watch folder, it adds the file name to the queue. The main thread then grabs an item off the watch_queue, and kicks off processing on that file using another class Worker(threading.thread). Sounds good. I made definite progress by creating two queues...watch_queue and processing_queue, and then used lists within the classes to store the state of which files are processing/watched. This sounds ugly, synchronization is one of those evils of multithreaded programming that should be avoided if possible. I see a couple of dirt simple solutions: 1. Have the watch thread move the file into a Processing folder that it doesn't scan 2. Have the watch thread copy the file into a python tempfile object and push that onto the queue, then delete the real file. This can be done efficiently (well, more efficiently than new.write(old.read()) with shutil.copyfileobj(old, new) Both those take very few lines of code, don't require synchronization, and don't require extending standard classes. Thanks foor the ideas Justin. I started subclassing/extending the Queue.Queue object with two additional classes. One to return the first item in the list without removing it from the queue, and one to return all items of the list without removing them. I think this will take me to where I want to go. If it doesn't work, I might just use your processing folder approach. That sounds the easiest, although I'm still interested in any idioms or other proven approaches for this sort of thing. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a way to program a robot with python (ex, an electric motor, control it's speed, etc)
On Jul 8, 5:06 pm, [EMAIL PROTECTED] wrote: i hope someone here can help me. basically, me and my friend have a summer project. in this project, we need something that would basically function as a blender. we know we'll need to buy a motor that spins, but what we're having trouble with is figuring out how to program it. we want to be able to control the speed of the motor. how would we accomplish this? i'm new to all of this, so i'm having a hard time wrapping my mind around how it'd be possible to program one of those things :\ ex: what if i want the motor to turn for 10 seconds. stop for 5. then turn the other direction. would you program it the same way you would on a personal computer (via c, python, etc)? This might be interesting to you. http://www.makingthings.com/ ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: How to Machine A python script execute Machine B python script?
On Jul 8, 6:45 pm, johnny [EMAIL PROTECTED] wrote: Anyone know how I can make Machine A python script execute a python script on Machine B ? xmlrpc will work. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: allow scripts to use .pth files?
On Jul 3, 7:35 am, Alan Isaac [EMAIL PROTECTED] wrote: Suppose I have a directory `scripts`. I'd like the scripts to have access to a package that is not installed, i.e., it is not on sys.path. On this list, various people have described a variety of tricks they use, but nobody has proposed a pretty way to allow this. I am therefore assuming there is not one. (?) How about allowing a `scripts.pth` file in such a `scripts` directory, to work like a path configuration file? (But to be used only when __name__==__main__.) Drawbacks? Alan Isaac import sys sys.path.append(../scripts) import Module_from_scripts_dir ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting importError: No module named _md5
On Jun 27, 7:04 am, jeffself [EMAIL PROTECTED] wrote: I'm running Python 2.5.1 which I'm getting from the MacPort package system. I just installed Django and tried to start up the Django server and I got the following error: ImportError: No module named _md5 I'm pretty sure this is a python problem, not Django problem. I'm looking in the python2.5 directory and I see md5.py, md5.pyc and md5.pyo files. Any suggestions? Try to load the md5 module from the interactive prompt. Are you using the python version you expect? Try starting up your previous version of python and see if you get the same error. Delete the MacPort install and install from source. My 2 cents. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: can't start Apache on Mac OS X--no listening sockets available?
On Jun 25, 11:09 pm, 7stud [EMAIL PROTECTED] wrote: On Jun 25, 7:23 pm, 7stud [EMAIL PROTECTED] wrote: I'm trying to get Apache set up on my system so I can use mod_python. I installed Apache 2.2.4 according to the following instructions: http://switch.richard5.net/isp-in-a-box-v2/installing-apache-on-mac-o... and everything seemed to install correctly, but I can't start Apache. I typed in the following command: $ sudo /Library/Apache2/bin/apachectl start Password: and I got this error message: httpd: Could not reliably determine the server's fully qualified domain name, using tms-computer.local for ServerName (48)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs Any ideas? Do you have Web Sharing in the prefs on as well? I checked and to my surprise Personal Web Sharing was turned on. I was messing around with it yesterday because I thought that might have something to do with my problems, but I couldn't get Personal Web Sharing to start--it just said Web Sharing starting up..., and it never did. Anyway, I turned Personal Web Sharing off, and then the error message changed to this: $ sudo /Library/Apache2/bin/apachectl start Password: httpd: Could not reliably determine the server's fully qualified domain name, using tms-computer.local for ServerName However, I checked the All Processes page in the Activity Monitor, and it said httpd was running. So I tested my apache installation by typing http:/localhost in Safari's address bar, and a page displayed saying It works!. But I wondered if that page was being served up by the pre-installed version of Apache or my new installation. So, I went into my new installation's directory and looked at the file: /Library/Apache2/htdocs/index.html and changed the text from It works! to Apache 2.2.4, but when I retyped http:/localhost in Safari's address bar, I still got a page saying It works!, so that page is not being served by my new installation. Console and the system logs are an invaluable debugging tool on Macs. Bet you have some errors there saying why apache couldnt stop/start. Glad you got it working. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter: different results from the same tcl script
On Jun 26, 1:06 am, Fabrizio Pollastri [EMAIL PROTECTED] wrote:
Hello,
in mixed python-tcl programming I found the following different
behaviours of the same tcl script.
If I type manually in the python interpreter the following lines
from Tkinter import *
w = Tk()
w.tk.evalfile('my_tcl_script.tcl')
where my_tcl_script.tcl is
#!/bin/sh
package require Tk
wm withdraw .
toplevel .root
wm title .root My title
I obtain one toplevel window with title My title, as expected.
The same result is obtained with the tcl shell command
% wish my_tcl_script.tcl
Now, I wish to run the same instructions from a python script. So, I
written the following script
from time import *
from Tkinter import *
w = Tk()
w.tk.evalfile('my_tcl_script.tcl')
sleep(3)
I expected to see the same toplevel window for 3 seconds, but the result
of this python script is nothing, no window appears.
If anybody can explain the different behaviour and how to normalize it
with the correct one, I will be very glad. Thank you in advance.
F. Pollastri
You need a call to `w.mainloop()`
w=Tk()
w.after(3000, lambda: w.quit())
w.mainloop()
~Sean
--
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Re: can't start Apache on Mac OS X--no listening sockets available?
On Jun 25, 7:23 pm, 7stud [EMAIL PROTECTED] wrote: I'm trying to get Apache set up on my system so I can use mod_python. I installed Apache 2.2.4 according to the following instructions: http://switch.richard5.net/isp-in-a-box-v2/installing-apache-on-mac-o... and everything seemed to install correctly, but I can't start Apache. I typed in the following command: $ sudo /Library/Apache2/bin/apachectl start Password: and I got this error message: httpd: Could not reliably determine the server's fully qualified domain name, using tms-computer.local for ServerName (48)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs Any ideas? Do you have Web Sharing in the prefs on as well? Possibly the built- in apache is already started on port 80. I've had luck with these: http://www.serverlogistics.com/downloads.php Except it's tuff to compile new versions into these. I failed at getting PHP5 running under it, but they work well out of the box. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: regular expressions eliminating filenames of type foo.thumbnail.jpg
On Jun 24, 10:00 pm, Justin Ezequiel [EMAIL PROTECTED]
wrote:
Why not ditch regular expressions altogether for this problem?
[ p for p in os.listdir(dir)
if os.path.isfile(os.path.join(dir,p))
and p.lower().find('.thumbnail.')==-1 ]
I like `and '.thumbnail.' not in p]` as a better ending. :)
~Sean
--
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Re: Split file into several and reformat
On Jun 20, 10:45 pm, [EMAIL PROTECTED] wrote:
Hi,
I want to take read an input file (sels.txt) that looks like:
Begin sels
sel1 = {1001, 1002, 1003, ...
...
1099}
sel2 = {1001, 1008, 1009 ...
...
1299}
End sels
And turn it into an output file for each of the sels in the input file, i.e
sel1.txt:
L1001
L1002
L1003
...
L1099
and sel2.txt:
L1001
L1008
L1009
...
L1299
And so on. Many thanks,
Wayne
hehe...
After Bruno's suggested read, go here: http://docs.python.org/tut/
Look at the string module.. specifically .strip() and .split(,)
Also look at reading files and perhaps lists.
for line in open(filename.txt, 'r').readlines():
handle_the_line()
Good Luck.
~Sean
--
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Re: How to create a file with read access rights
On Jun 21, 8:27 am, Johny [EMAIL PROTECTED] wrote: Is it possible to create a file on Linux with access rights? For example owner can read and write into the file others can only read from the file Thanks for replies L. That all depends on your umask. Most commonly, the default value is 022 which translates to 755 or ower has full control, and all others can read and execute. If you'd like to change a specific files permissios with python, look into os.chmod() ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows XMLRPC Service
On Jun 19, 12:32 pm, Gabriel Genellina [EMAIL PROTECTED] wrote: En Tue, 19 Jun 2007 14:57:10 -0300, [EMAIL PROTECTED] escribió: #win32event.WAIT_TIMEOUT = 2 --- This just makes the loop never execute because # the WaitFor... part always returns 258 WAIT_TIMEOUT is 258. How do you see it is 2? py import win32event py win32event.WAIT_TIMEOUT 258 I meant here that *if* I set the WAIT_TIMEOUT to 2, then I see that behavior. Ah, ok! I should have stated clearly that WAIT_TIMEOUT is a Windows predefined constant, not your desired timeout value. Thank you again Gabriel. I'll post back with something complete. Yes, please, a working example would be nice for future readers... -- Gabriel Genellina For posterity... import sys import win32serviceutil import win32service import win32event import win32evtlogutil import servicemanager import SocketServer, socket from SimpleXMLRPCServer import SimpleXMLRPCServer,SimpleXMLRPCRequestHandler # Threaded mix-in class AsyncXMLRPCServer(SocketServer.ThreadingMixIn,SimpleXMLRPCServer): pass import XMLRPC_funcs # module containing the functions wrapped in a class class XMLRPCservice(win32serviceutil.ServiceFramework): _svc_name_ = PythonXMLRPC _svc_display_name_ = PythonXMLRPC _svc_description_ = Multi-threaded Python XMLRPC Server def __init__(self, args): # set the timeout so the service can stop...Otherwise it hangs forever socket.setdefaulttimeout(15) win32evtlogutil.AddSourceToRegistry(self._svc_display_name_, sys.executable, Application) win32serviceutil.ServiceFramework.__init__(self, args) # Create an event which we will use to wait on. self.hWaitStop = win32event.CreateEvent(None, 0, 0, None) localhost = socket.gethostbyname(socket.gethostname()) self.server = AsyncXMLRPCServer((localhost, 8000), SimpleXMLRPCRequestHandler) def SvcStop(self): self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING) #send the stop event win32event.SetEvent(self.hWaitStop) def SvcDoRun(self): # log a start msg servicemanager.LogMsg(servicemanager.EVENTLOG_INFORMATION_TYPE, servicemanager.PYS_SERVICE_STARTED, (self._svc_name_, ' (%s)' % self._svc_name_)) self.server.register_instance(XMLRPC_funcs.XMLRPC_funcs()) # handle requests until the stop event is received while win32event.WaitForSingleObject(self.hWaitStop, 0) == win32event.WAIT_TIMEOUT: self.server.handle_request() # log a stopped msg win32evtlogutil.ReportEvent(self._svc_name_, servicemanager.PYS_SERVICE_STOPPED, 0, servicemanager.EVENTLOG_INFORMATION_TYPE, (self._svc_name_,)) if __name__ == '__main__': win32serviceutil.HandleCommandLine(XMLRPCservice) -- http://mail.python.org/mailman/listinfo/python-list
Re: string formatter %x and a class instance with __int__ or __long__ cannot handle long
On Jun 20, 8:24 pm, Kenji Noguchi [EMAIL PROTECTED] wrote: Hi I'm using Python 2.4.4 on 32bit x86 Linux. I have a problem with printing hex string for a value larger than 0x8 when the value is given to % operator via an instance of a class with __int__(). If I pass a long value to % operator it works just fine. Example1 -- pass a long value directly. this works. x=0x8000 x 2147483648L type(x) type 'long' %08x % x '8000' Example2 -- pass an instance of a class with __int__() class X: ... def __init__(self, v): ... self.v = v ... def __int__(self): ... return self.v ... y = X(0x8000) %08x % y Traceback (most recent call last): File stdin, line 1, in ? TypeError: int argument required The behavior looks inconsistent. By the way __int__ actually returned a long type value in the Example2. The %08x allows either int or long in the Example1, however it accepts int only in the Example2. Is this a bug or expected? by the way same thing happends on a 64bit system with a value of 0x8000. Regards, Kenji Noguchi In your second example y is an instance of class X...not an int. y.v is an int. Are you hoping it will cast it to an int as needed using your method? If so, I think you need to do so explicitly...ie %08x % int(y) ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows XMLRPC Service
On Jun 18, 2:16 am, Gabriel Genellina [EMAIL PROTECTED] wrote: En Mon, 18 Jun 2007 00:25:25 -0300, [EMAIL PROTECTED] escribió: I'm trying to serve up a simple XMLRPC server as a windows service. I got it to run properly, I'm just not sure how to stop it properly. Most of the documentation/examples I found for this was from forums, so I'd love some links to relevant info also. Here's what I have...taken from the cookbook with the xmlrpc server added: def __init__(self, args): win32serviceutil.ServiceFramework.__init__(self, args) # Create an event which we will use to wait on. # The service stop request will set this event. self.hWaitStop = win32event.CreateEvent(None, 0, 0, None) def SvcStop(self): # Before we do anything, tell the SCM we are starting the stop process. self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING) # quit the xmlrpc sever self.server.quit() What is quit()? As the server may be processing a request I'd move any finalization code below, after exiting the while loop. # And set my event. win32event.SetEvent(self.hWaitStop) def SvcDoRun(self): # Serve up the XMLRPC forever self.server = SimpleXMLRPCServer.SimpleXMLRPCServer((10.0.1.6, 8000)) self.server.register_instance(MyClass()) self.server.serve_forever() win32event.WaitForSingleObject(self.hWaitStop) The simplest solution is to replace serve_forever with a loop waiting on hWaitStop: while WaitForSingleObject(self.hWaitStop, 0)==WAIT_TIMEOUT: self.server.handle_request() Set the socket timeout to a reasonable value (you'll have to wait that time before exiting). Also, a ThreadingTCPServer may be better if you expect more than a request at a time. If you search past messages you may find other ways. -- Gabriel Genellina- Hide quoted text - - Show quoted text - I can't quite figure out where to set the socket timeout. I tried setting win32event.WAIT_TIMEOUT, but I'm pretty sure that's not the variable you were talking about. I did manage to make it multi- threaded by incorporating a different recipe, and I'm beginning to understand the control flow a bit better, but it doesn't seem to be doing what I expect. When SvcStop() is executed and calls win32event.SetEvent(self.hWaitStop), the while loop should break as win32event.WaitForSingleObject(self.hWaitStop, 0) returns zero at this point. But it doesn't do that. What am I missing? import win32serviceutil import win32service import win32event import SocketServer from SimpleXMLRPCServer import SimpleXMLRPCServer,SimpleXMLRPCRequestHandler # Threaded mix-in class AsyncXMLRPCServer(SocketServer.ThreadingMixIn,SimpleXMLRPCServer): pass class MyClass(object): def hello(self): return Hello World class SmallestPythonService(win32serviceutil.ServiceFramework): _svc_name_ = PythonXMLRPC _svc_display_name_ = PythonXMLRPC def __init__(self, args): win32serviceutil.ServiceFramework.__init__(self, args) # Create an event which we will use to wait on. self.hWaitStop = win32event.CreateEvent(None, 0, 0, None) import socket localhost = socket.gethostbyname(socket.gethostname()) self.server = AsyncXMLRPCServer((localhost, 8000), SimpleXMLRPCRequestHandler) def SvcStop(self): self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING) win32event.SetEvent(self.hWaitStop) #print EVENT:, win32event.WaitForSingleObject(self.hWaitStop, 0) # returns 0 here def SvcDoRun(self): self.server.register_instance(MyClass()) #win32event.WAIT_TIMEOUT = 2 --- This just makes the loop never execute because # the WaitFor... part always returns 258 while win32event.WaitForSingleObject(self.hWaitStop, 0) == win32event.WAIT_TIMEOUT: self.server.handle_request() if __name__ == '__main__': win32serviceutil.HandleCommandLine(SmallestPythonService) Thanks for any help! ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows XMLRPC Service
On Jun 19, 10:21 am, Gabriel Genellina [EMAIL PROTECTED] wrote: En Tue, 19 Jun 2007 03:45:19 -0300, [EMAIL PROTECTED] escribió: I can't quite figure out where to set the socket timeout. I tried setting win32event.WAIT_TIMEOUT, but I'm pretty sure that's not the variable you were talking about. I did manage to make it multi- threaded by incorporating a different recipe, and I'm beginning to understand the control flow a bit better, but it doesn't seem to be doing what I expect. When SvcStop() is executed and calls win32event.SetEvent(self.hWaitStop), the while loop should break as win32event.WaitForSingleObject(self.hWaitStop, 0) returns zero at this point. But it doesn't do that. What am I missing? May be because you didn't set correctly the socket timeout. See the comments below. def SvcStop(self): self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING) win32event.SetEvent(self.hWaitStop) #print EVENT:, win32event.WaitForSingleObject(self.hWaitStop, 0) # returns 0 here That's OK, since you have set the event. def SvcDoRun(self): self.server.register_instance(MyClass()) #win32event.WAIT_TIMEOUT = 2 --- This just makes the loop never execute because # the WaitFor... part always returns 258 WAIT_TIMEOUT is 258. How do you see it is 2? For example, see http://msdn2.microsoft.com/en-us/library/ms681382.aspx. Python 2.5.1 + pywin32 210 prints this on my PC: py import win32event py win32event.WAIT_TIMEOUT 258 while win32event.WaitForSingleObject(self.hWaitStop, 0) == win32event.WAIT_TIMEOUT: self.server.handle_request() The loop above should keep running until hWaitStop is set, with a maximum wait time (inside handle_request) corresponding to the socket timeout value. You can either: - use socket.setdefaulttimeout() (in __init__, by example) before anything else. This will set a global timeout for all sockets. - modify the socket instance. Just add this method to your AsyncServer: def server_activate(self): SimpleXMLRPCServer.server_activate(self) self.socket.settimeout(15) # for 15 secs -- Gabriel Genellina def SvcDoRun(self): self.server.register_instance(MyClass()) #win32event.WAIT_TIMEOUT = 2 --- This just makes the loop never execute because # the WaitFor... part always returns 258 WAIT_TIMEOUT is 258. How do you see it is 2? For example, see http://msdn2.microsoft.com/en-us/library/ms681382.aspx. Python 2.5.1 + pywin32 210 prints this on my PC: py import win32event py win32event.WAIT_TIMEOUT 258 I meant here that *if* I set the WAIT_TIMEOUT to 2, then I see that behavior. - use socket.setdefaulttimeout() (in __init__, by example) before anything else. This will set a global timeout for all sockets. That was the one that did it. Thank you again Gabriel. I'll post back with something complete. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Windows XMLRPC Service
Hi, I'm trying to serve up a simple XMLRPC server as a windows service. I got it to run properly, I'm just not sure how to stop it properly. Most of the documentation/examples I found for this was from forums, so I'd love some links to relevant info also. Here's what I have...taken from the cookbook with the xmlrpc server added: import win32serviceutil import win32service import win32event import SimpleXMLRPCServer class MyClass(object): def hello(self): return Hello World! class SmallestPythonService(win32serviceutil.ServiceFramework): _svc_name_ = PythonXMLRPC _svc_display_name_ = PythonXMLRPC def __init__(self, args): win32serviceutil.ServiceFramework.__init__(self, args) # Create an event which we will use to wait on. # The service stop request will set this event. self.hWaitStop = win32event.CreateEvent(None, 0, 0, None) def SvcStop(self): # Before we do anything, tell the SCM we are starting the stop process. self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING) # quit the xmlrpc sever self.server.quit() # And set my event. win32event.SetEvent(self.hWaitStop) def SvcDoRun(self): # Serve up the XMLRPC forever self.server = SimpleXMLRPCServer.SimpleXMLRPCServer((10.0.1.6, 8000)) self.server.register_instance(MyClass()) self.server.serve_forever() win32event.WaitForSingleObject(self.hWaitStop) if __name__=='__main__': win32serviceutil.HandleCommandLine(SmallestPythonService) ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Bytes/File Size Format Function
On Jun 12, 8:47 pm, samuraisam [EMAIL PROTECTED] wrote: Quick file size formatting for all those seekers out there... import math def filesizeformat(bytes, precision=2): Returns a humanized string for a given amount of bytes bytes = int(bytes) if bytes is 0: return '0bytes' log = math.floor(math.log(bytes, 1024)) return %.*f%s % ( precision, bytes / math.pow(1024, log), ['bytes', 'kb', 'mb', 'gb', 'tb','pb', 'eb', 'zb', 'yb'] [int(log)] ) Wait a sec...what if you send it a large amount of bytes? Say... bigger than 2147483647. You'll get an OverflowError. I thought you had my solution... ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Bytes/File Size Format Function
On Jun 13, 12:48 am, [EMAIL PROTECTED] wrote: On Jun 12, 8:47 pm, samuraisam [EMAIL PROTECTED] wrote: Quick file size formatting for all those seekers out there... import math def filesizeformat(bytes, precision=2): Returns a humanized string for a given amount of bytes bytes = int(bytes) if bytes is 0: return '0bytes' log = math.floor(math.log(bytes, 1024)) return %.*f%s % ( precision, bytes / math.pow(1024, log), ['bytes', 'kb', 'mb', 'gb', 'tb','pb', 'eb', 'zb', 'yb'] [int(log)] ) Wait a sec...what if you send it a large amount of bytes? Say... bigger than 2147483647. You'll get an OverflowError. I thought you had my solution... ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Bytes/File Size Format Function
On Jun 13, 12:48 am, [EMAIL PROTECTED] wrote: On Jun 12, 8:47 pm, samuraisam [EMAIL PROTECTED] wrote: Quick file size formatting for all those seekers out there... import math def filesizeformat(bytes, precision=2): Returns a humanized string for a given amount of bytes bytes = int(bytes) if bytes is 0: return '0bytes' log = math.floor(math.log(bytes, 1024)) return %.*f%s % ( precision, bytes / math.pow(1024, log), ['bytes', 'kb', 'mb', 'gb', 'tb','pb', 'eb', 'zb', 'yb'] [int(log)] ) Wait a sec...what if you send it a large amount of bytes? Say... bigger than 2147483647. You'll get an OverflowError. I thought you had my solution... ~Sean I take it back. -- http://mail.python.org/mailman/listinfo/python-list
Re: Bytes/File Size Format Function
On Jun 12, 8:47 pm, samuraisam [EMAIL PROTECTED] wrote: Quick file size formatting for all those seekers out there... import math def filesizeformat(bytes, precision=2): Returns a humanized string for a given amount of bytes bytes = int(bytes) if bytes is 0: return '0bytes' log = math.floor(math.log(bytes, 1024)) return %.*f%s % ( precision, bytes / math.pow(1024, log), ['bytes', 'kb', 'mb', 'gb', 'tb','pb', 'eb', 'zb', 'yb'] [int(log)] ) Life is odd. I just came to the group with the specific purpose of asking this exact question. Who are you? :) Thanks! ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: launching default browser
On Jun 8, 8:41 am, alf [EMAIL PROTECTED] wrote: Hi, I wonder how to launch from python default Windows browser? In fact I have the same question for Linux. thx in advancve, -- alf For posterity... On a mac [sean:~] sean% open http://www.google.com ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: ftplib error- Large file
On Jun 6, 11:21 pm, Hendrik van Rooyen [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: Hi all, I'm using ftplib to transfer large files to remote sites. The process seems to work perfectly with small files, but when the file gets to large ~20GB I begin getting errors that sometimes seem to be non- fatal, and other times the transfer does not complete. I've debugged the hell out of the code, and can't figure out what is going on..is it the remote site? Packet loss? 20 gig is a big thing - what is your link speed, and how long does the thing run before falling over - Is your ISP maybe giving you or the remote site a new IP addy periodically? Are there any anti jabber precautions taken anywhere? you may have to break it up into smaller chunks and glue them together remotely... hth - Hendrik It's different sites (state to state) within the same company, so I'm sure of the IP addresses. Whats odd is that the transfers don't fail most of the time. The transfer usually completes properly but ftplib.FTP.storbinary() throws an IOError at the end of the file instead of returning the status of the transfer. I've resorted to just catching and logging the exception and then comparing remote vs. local md5's to check for integrity, but it seems like if a connection error occurs, storbinary should handle the error and return an error code rather than throwing an exception. The 20gb files take about an hour to transfer, and I've had success with files up to 60gb so far... once I figured out what ftplib was doing and starting cathing the IOError. Why would storbinary throw an exception even when the file transfer was successful? Why would the exception not be thrown until after the file was sent? Shouldn't ftplib return something like (104, Connection reset by peer) instead of throwing an error? Is my reasoning off somewhere? ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: get a list from a string
On Jun 7, 3:34 am, simon kagwe [EMAIL PROTECTED] wrote: Hi, I have a string distances = [[1,1,1,1],[2,2,2,2]]. I want to create a variable called distances whose value is the list [[1,1,1,1],[2,2,2,2]]. How can I go about that? I know I can use setattr, but how do I create the list from the string? Regards, Simon exec(distances = [[1,1,1,1],[2,2,2,2]]) ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: ftplib error- Large file
On Jun 7, 8:54 am, Facundo Batista [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: Why would storbinary throw an exception even when the file transfer was successful? Why would the exception not be thrown until after the file was sent? Shouldn't ftplib return something like (104, Connection reset by peer) instead of throwing an error? Is my reasoning off somewhere? There was an error, the connection was reset by peer. The error code is 104. As it *was* an error, an exception is correct. You always can hide it yourself, with try/except... Regards, -- . Facundo . Blog:http://www.taniquetil.com.ar/plog/ PyAr:http://www.python.org/ar/ Ok. I guess that makes sense. But what about the other questions...mainly: Why would it throw an exception even though the file was properly transferred? I guess this could be blamed on the FTP server. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Who uses Python?
On Jun 4, 1:47 pm, Mark Carter [EMAIL PROTECTED] wrote: walterbyrd wrote: Anything else? Finance? Web-analytics? SEO? Digital art? I played with NodeBox a little while ago:http://nodebox.net/code/index.php/Home NodeBox is a Mac OS X application that lets you create 2D visuals (static, animated or interactive) using Python programming code and export them as a PDF or a QuickTime movie. NodeBox is free and well-documented. Pretty trippy stuff. Thanks for the link. Neato. -- http://mail.python.org/mailman/listinfo/python-list
ftplib error- Large file
Hi all, I'm using ftplib to transfer large files to remote sites. The process seems to work perfectly with small files, but when the file gets to large ~20GB I begin getting errors that sometimes seem to be non- fatal, and other times the transfer does not complete. I've debugged the hell out of the code, and can't figure out what is going on..is it the remote site? Packet loss? Traceback (most recent call last): File /usr/local/sw/bin/FTPput.py, line 142, in execute self.ftp.put(file.path) File /usr/local/sw/lib/FTPconn.py, line 32, in put return self.storbinary(STOR %s % destfile, open(f.path, 'rb')) File /usr/lib/python2.2/ftplib.py, line 422, in storbinary return self.voidresp() File /usr/lib/python2.2/ftplib.py, line 222, in voidresp resp = self.getresp() File /usr/lib/python2.2/ftplib.py, line 208, in getresp resp = self.getmultiline() File /usr/lib/python2.2/ftplib.py, line 194, in getmultiline line = self.getline() File /usr/lib/python2.2/ftplib.py, line 181, in getline line = self.file.readline() IOError: [Errno 104] Connection reset by peer I'd appreciate any input or ideas. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
get_traceback
Hi, Is there a function or idoim for returning an exception/traceback rather than just printing it to stdout? I'm running a deamon where stdout is going to /dev/null, and I'm not even watching it..until now. All the functions I found in traceback and sys seemed only to print the error rather than just returning it, so I resorted to this: def get_traceback(): import traceback, tempfile stdout = sys.stdout f = tempfile.TemporaryFile(mode='w+') sys.stdout = f traceback.print_tb(sys.exc_info()[2]) error = f.read() f.close() sys.stdout = stdout return error Whats the right function?!? Thanks. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: get_traceback
On Jun 4, 3:51 pm, Gabriel Genellina [EMAIL PROTECTED] wrote: En Mon, 04 Jun 2007 14:23:00 -0300, [EMAIL PROTECTED] escribió: Is there a function or idoim for returning an exception/traceback rather than just printing it to stdout? I'm running a deamon where stdout is going to /dev/null, and I'm not even watching it..until now. All the functions I found in traceback and sys seemed only to print the error rather than just returning it, so I resorted to this: Read again the docs for the traceback module. Maybe you are looking for traceback.format_exception(*sys.exc_info()) or traceback.format_exc() f = tempfile.TemporaryFile(mode='w+') sys.stdout = f traceback.print_tb(sys.exc_info()[2]) In this case you can use StringIO instead of a temporary file, and the file argument to print_tb instead of swapping sys.stdout -- Gabriel Genellina Thanks Gabriel. That was exactly what I was looking for. Also, I'm glad to make a connection to the StringIO class. I'm sure I will remember it the next time I need it. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PIL to find separator pages
On May 31, 10:01 am, Larry Bates [EMAIL PROTECTED] wrote: I have a project that I wanted to solicit some advice on from this group. I have millions of pages of scanned documents with each page in and individual .JPG file. When the documents were scanned the people that did the scanning put a colored (hot pink) separator page between the individual documents. I was wondering if there was any way to utilize PIL to scan through the individual files, look at some small section on the page, and determine if it is a separator page by somehow comparing the color to the separator page color? I realize that this would be some sort of percentage match where 100% would be a perfect match and any number lower would indicate that it was less likely that it was a coverpage. Thanks in advance for any thoughts or advice. Regards, Larry Bates I used GraphicsMagick for a similar situation. Once installed you can run `gm identify' to return all sorts of usefull information about the images. In my case I had python call 'gm' to identify the number of colors in each image, then inspect the output and handle the image accordingly. I'll bet PIL could do a similar thing, but in my case I was examining DPX files which PIL can't handle. Either approach will most likely take a bit of time unless you spread the work over several machines. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: paste text with newlines into raw_input?
On May 30, 2:04 pm, BartlebyScrivener [EMAIL PROTECTED] wrote: Using Python on Debian Etch. What is the best way to paste a block of text in at the command prompt. I'm trying something like: Quote = raw_input(Paste quote here: ) Which works great for one line of text with a single newline. It gets stripped. Okay. Is there a way to paste in a block of text that has multiple lines and newlines? I don't care if they all get stripped in the process, in fact I'd prefer it. I've used strip before, but that doesn't seem to work until you get the text into the program. Thanks for any help. Rick import sys s =sys.stdin.read() print s which will read until ctrl-d ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: multiline regular expression (replace)
On May 29, 2:03 am, Zdenek Maxa [EMAIL PROTECTED] wrote: Hi all, I would like to perform regular expression replace (e.g. removing everything from within tags in a XML file) with multiple-line pattern. How can I do this? where = open(filename).read() multilinePattern = ^tag \/tag$ re.search(multilinePattern, where, re.MULTILINE) Thanks greatly, Zdenek Why not use an xml package for working with xml files? I'm sure they'll handle your multiline tags. http://effbot.org/zone/element-index.htm http://codespeak.net/lxml/ ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Can python create a dictionary from a list comprehension?
On May 28, 12:25 am, Marc 'BlackJack' Rintsch [EMAIL PROTECTED] wrote:
In [EMAIL PROTECTED], half.italian
wrote:
[entries.__setitem__(int(d.date.strftime('%m'))], d.id) for d in
links]
btw...I was curious of this too. I used 'dir(dict)' and looked for a
method that might do what we wanted and bingo!
This is really ugly. Except `__init__()` it's always a code smell if you
call a magic method directly instead of using the corresponding
syntactic sugar or built in function. And using a list comprehension just
for side effects is misleading because the reader expects a (useful) list
to be build when stumbling over a list comp and it's wasteful because an
unnecessary list of `None`\s is build and thrown away for no reason other
than to have a one liner. This is not Perl! ;-)
Ciao,
Marc 'BlackJack' Rintsch
It's ugly I agree, but it was the first solution I found. I need you
guys for the _right_ solutions :) I have stumbled over the same
situation myself. I don't see that the list comprehension itself is
misleading. If nothing is catching the empty list that is returned,
it signals that the returned list is unimportant, and if wrapped by a
call to dict() its obvious also.
Do you think we just shouldn't use list comprehensions to build
dictinaries at all? Or is Stefan's solution acceptable (and pythonic)?
~Sean
--
http://mail.python.org/mailman/listinfo/python-list
Re: User input with a default value that can be modified
On May 28, 11:52 am, Etienne Hilson [EMAIL PROTECTED] wrote: Hello the list :-) I do a little program that permit the user to manage list of sentences. This program runs into a linux shell. The user can add, modify and delete the sentences. What I want to do is : When the user want to modify one sentence, I would like to do this : Modify your sentence : The_sentence_appear_here_followed_by_a_cursor And the user can go back with the cursor, like in the bash shell, delete, modify, and when pressing enter, the new value (or the same if not modified) is put in my variable. Of course, the first think I did as a newbie was : new_sentence = raw_input(Modify your sentence : old_sentence) But OF COURSE, stupid am I, the user cannot put the cursor back into the old sentence ! I think about playing with some sophisticated keyboard exercise where I could program a new input command with a value already appearing as answer, but I am pretty sure that it exists already. What do you think about it ? Actually, it is quite difficult to find anything on it, because the keywords are not very obvious (input, default answer, ...) Thank you for your help. Etienne -- (\__/) (='.'=) Ceci est un petit lapin. Copiez/collez-le dans ()_() votre signature pour l'aider à dominer le monde Check into the readline module. This is what I came up with. A second thread injects the text into the open readline instance. Hopefully the experts will show the _right_ way to do it. import readline, threading import time class write(threading.Thread): def __init__ (self, s): threading.Thread.__init__(self) self.s = s def run(self): time.sleep(.01) readline.insert_text(self.s) readline.redisplay() write(Edit this sentence).start() s = raw_input(prompt:) print s ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: User input with a default value that can be modified
On May 28, 11:52 am, Etienne Hilson [EMAIL PROTECTED] wrote: Hello the list :-) I do a little program that permit the user to manage list of sentences. This program runs into a linux shell. The user can add, modify and delete the sentences. What I want to do is : When the user want to modify one sentence, I would like to do this : Modify your sentence : The_sentence_appear_here_followed_by_a_cursor And the user can go back with the cursor, like in the bash shell, delete, modify, and when pressing enter, the new value (or the same if not modified) is put in my variable. Of course, the first think I did as a newbie was : new_sentence = raw_input(Modify your sentence : old_sentence) But OF COURSE, stupid am I, the user cannot put the cursor back into the old sentence ! I think about playing with some sophisticated keyboard exercise where I could program a new input command with a value already appearing as answer, but I am pretty sure that it exists already. What do you think about it ? Actually, it is quite difficult to find anything on it, because the keywords are not very obvious (input, default answer, ...) Thank you for your help. Etienne -- (\__/) (='.'=) Ceci est un petit lapin. Copiez/collez-le dans ()_() votre signature pour l'aider à dominer le monde Check into the readline module. This is what I came up with. A second thread injects the text into the open readline instance. Hopefully the experts will show the _right_ way to do it. import readline, threading import time class write(threading.Thread): def __init__ (self, s): threading.Thread.__init__(self) self.s = s def run(self): time.sleep(.01) readline.insert_text(self.s) readline.redisplay() write(Edit this sentence).start() s = raw_input(prompt:) print s ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Can python create a dictionary from a list comprehension?
On May 27, 1:55 pm, erikcw [EMAIL PROTECTED] wrote:
Hi,
I'm trying to turn o list of objects into a dictionary using a list
comprehension.
Something like
entries = {}
[entries[int(d.date.strftime('%m'))] = d.id] for d in links]
I keep getting errors when I try to do it. Is it possible? Do
dictionary objects have a method equivalent to [].append? Maybe a
lambda?
Thanks for your help!
Erik
try...
[entries.__setitem__(int(d.date.strftime('%m'))], d.id) for d in
links]
btw...I was curious of this too. I used 'dir(dict)' and looked for a
method that might do what we wanted and bingo!
~Sean
--
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Re: sockets, gethostname() changing
On May 24, 8:50 pm, 7stud [EMAIL PROTECTED] wrote: Thanks for the response. On May 24, 9:24 pm, [EMAIL PROTECTED] wrote: I can't imagine why your hostname would be changing, unless you installed some of their proprietary software thats messing around with things. When I first started using Terminal, I noticed that the prompt in Terminal changed when I was connected to the internet. What is the hostname set to in Sys Prefs-Sharing? My Name's Computer Try setting it there. What are the before and after connection names you get? If I add the line: host = socket.gethostname() print host #-- and I'm not connected to the internet and I run the program, I get: my-names-computer.local When I'm connected to the internet, I get: dialup-9.999.999.999.dial9.xxx.level9.net That would bug me to high hell. A router in the middle would probably stop that. -- http://mail.python.org/mailman/listinfo/python-list
Re: sockets, gethostname() changing
On May 24, 8:04 pm, 7stud [EMAIL PROTECTED] wrote: Hi, I'm experimenting with a basic socket program(from a book), and both the client and server programs are on my computer. In both programs, I call socket.gethostname(), but I discovered that when I am connected to the internet, both the client and server hang and nothing happens. I discovered that the hostname of my computer automatically changes to that of my isp when I'm connected to the internet, and presumably the server program on my computer cannot listen on my isp's address(host, port). Is there a way to make the hostname of my computer static, so that it doesn't change to my isp's hostname when I connect to the internet. I'm using mac os 10.4.7. Why does my computer's hostname dynamically change in the first place? server program: --- import socket s = socket.socket() host = socket.gethostname() print host port = 1274 s.bind((host, port)) s.listen(5) while(Ctrl-C hasn't been entered): c, addr = s.accept() #blocks and waits for client connection print Got socket connection from, addr c.send(Thank you for connecting. Now get lost.) c.close() client program: --- import socket s = socket.socket() host = socket.gethostname() port = 1274 s.connect((host, port)) print s.recv(1024) s.close() Try setting an environment variable for 'hostname' using this: http://www.versiontracker.com/dyn/moreinfo/macosx/15073 Either way, its a good program to have. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: sockets, gethostname() changing
On May 24, 8:04 pm, 7stud [EMAIL PROTECTED] wrote: Hi, I'm experimenting with a basic socket program(from a book), and both the client and server programs are on my computer. In both programs, I call socket.gethostname(), but I discovered that when I am connected to the internet, both the client and server hang and nothing happens. I discovered that the hostname of my computer automatically changes to that of my isp when I'm connected to the internet, and presumably the server program on my computer cannot listen on my isp's address(host, port). Is there a way to make the hostname of my computer static, so that it doesn't change to my isp's hostname when I connect to the internet. I'm using mac os 10.4.7. Why does my computer's hostname dynamically change in the first place? server program: --- import socket s = socket.socket() host = socket.gethostname() print host port = 1274 s.bind((host, port)) s.listen(5) while(Ctrl-C hasn't been entered): c, addr = s.accept() #blocks and waits for client connection print Got socket connection from, addr c.send(Thank you for connecting. Now get lost.) c.close() client program: --- import socket s = socket.socket() host = socket.gethostname() port = 1274 s.connect((host, port)) print s.recv(1024) s.close() I can't imagine why your hostname would be changing, unless you installed some of their proprietary software thats messing around with things. What is the hostname set to in Sys Prefs-Sharing? Try setting it there. What are the before and after connection names you get? ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Parallel/distributed generator
On May 23, 11:00 am, George Sakkis [EMAIL PROTECTED] wrote: I'm looking for any existing packages or ideas on how to implement the equivalent of a generator (in the Python sense, i.e.http://www.python.org/dev/peps/pep-0255/) in a parallel/distributed way. As a use case, imagine a function that generates a range of primes. I'd like to be able to do something along the following lines: def iterprimes(start=1, end=None): # ... yield prime # rpc-related initialization ... rpc_proxy = some_rpc_lib(iterprimes, start=1e6, end=1e12) for prime in proxy: print prime Is there any module out there that does anything close to this ? George Parellel Python? http://www.parallelpython.com/content/view/17/31/#SUM_PRIMES I've never used it, but looks like it does what you are looking for. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Parallel/distributed generator
On May 23, 11:00 am, George Sakkis [EMAIL PROTECTED] wrote: I'm looking for any existing packages or ideas on how to implement the equivalent of a generator (in the Python sense, i.e.http://www.python.org/dev/peps/pep-0255/) in a parallel/distributed way. As a use case, imagine a function that generates a range of primes. I'd like to be able to do something along the following lines: def iterprimes(start=1, end=None): # ... yield prime # rpc-related initialization ... rpc_proxy = some_rpc_lib(iterprimes, start=1e6, end=1e12) for prime in proxy: print prime Is there any module out there that does anything close to this ? George Parellel Python? http://www.parallelpython.com/content/view/17/31/#SUM_PRIMES I've never used it, but looks like it does what you are looking for. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Parallel/distributed generator
On May 23, 11:00 am, George Sakkis [EMAIL PROTECTED] wrote: I'm looking for any existing packages or ideas on how to implement the equivalent of a generator (in the Python sense, i.e.http://www.python.org/dev/peps/pep-0255/) in a parallel/distributed way. As a use case, imagine a function that generates a range of primes. I'd like to be able to do something along the following lines: def iterprimes(start=1, end=None): # ... yield prime # rpc-related initialization ... rpc_proxy = some_rpc_lib(iterprimes, start=1e6, end=1e12) for prime in proxy: print prime Is there any module out there that does anything close to this ? George Parellel Python? http://www.parallelpython.com/content/view/17/31/#SUM_PRIMES I've never used it, but looks like it does what you are looking for. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Parallel/distributed generator
On May 23, 11:00 am, George Sakkis [EMAIL PROTECTED] wrote: I'm looking for any existing packages or ideas on how to implement the equivalent of a generator (in the Python sense, i.e.http://www.python.org/dev/peps/pep-0255/) in a parallel/distributed way. As a use case, imagine a function that generates a range of primes. I'd like to be able to do something along the following lines: def iterprimes(start=1, end=None): # ... yield prime # rpc-related initialization ... rpc_proxy = some_rpc_lib(iterprimes, start=1e6, end=1e12) for prime in proxy: print prime Is there any module out there that does anything close to this ? George Parellel Python? http://www.parallelpython.com/content/view/17/31/#SUM_PRIMES I've never used it, but looks like it does what you are looking for. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Parallel/distributed generator
On May 23, 11:00 am, George Sakkis [EMAIL PROTECTED] wrote: I'm looking for any existing packages or ideas on how to implement the equivalent of a generator (in the Python sense, i.e.http://www.python.org/dev/peps/pep-0255/) in a parallel/distributed way. As a use case, imagine a function that generates a range of primes. I'd like to be able to do something along the following lines: def iterprimes(start=1, end=None): # ... yield prime # rpc-related initialization ... rpc_proxy = some_rpc_lib(iterprimes, start=1e6, end=1e12) for prime in proxy: print prime Is there any module out there that does anything close to this ? George DOLT! -- http://mail.python.org/mailman/listinfo/python-list
Re: Parallel/distributed generator
On May 23, 11:00 am, George Sakkis [EMAIL PROTECTED] wrote: I'm looking for any existing packages or ideas on how to implement the equivalent of a generator (in the Python sense, i.e.http://www.python.org/dev/peps/pep-0255/) in a parallel/distributed way. As a use case, imagine a function that generates a range of primes. I'd like to be able to do something along the following lines: def iterprimes(start=1, end=None): # ... yield prime # rpc-related initialization ... rpc_proxy = some_rpc_lib(iterprimes, start=1e6, end=1e12) for prime in proxy: print prime Is there any module out there that does anything close to this ? George Parellel Python? http://www.parallelpython.com/content/view/17/31/#SUM_PRIMES I've never used it, but looks like it does what you are looking for. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Parallel/distributed generator
On May 23, 1:22 pm, Paul McGuire [EMAIL PROTECTED] wrote: On May 23, 2:58 pm, [EMAIL PROTECTED] wrote: On May 23, 11:00 am, George Sakkis [EMAIL PROTECTED] wrote: I'm looking for any existing packages or ideas on how to implement the equivalent of a generator (in the Python sense, i.e.http://www.python.org/dev/peps/pep-0255/) in a parallel/distributed way. As a use case, imagine a function that generates a range of primes. I'd like to be able to do something along the following lines: def iterprimes(start=1, end=None): # ... yield prime # rpc-related initialization ... rpc_proxy = some_rpc_lib(iterprimes, start=1e6, end=1e12) for prime in proxy: print prime Is there any module out there that does anything close to this ? George DOLT!- Hide quoted text - - Show quoted text - I thought you were making a joke about parallel processing. I thought you were making a joke about parallel processing. I thought you were making a joke about parallel processing. I thought you were making a joke about parallel processing. -- Paul Damn computers! -- http://mail.python.org/mailman/listinfo/python-list
Re: i/o prob revisited
On May 18, 12:06 am, [EMAIL PROTECTED] wrote:
Hi,
I am parsing an xml file ,before that i have replaced a string in
the original xml file with another and made a new xml file which will
now be parsed.I am also opening some more files for output.The
following code shows some i/o commands.
file_input = raw_input(Enter The ODX File Path:)
input_xml = open(file_input,'r')
(shortname,ext)=os.path.splitext(file_input)
f_open_out=shortname+.ini
log=shortname+.xls
test_file=shortname+testxml.xml
saveout = sys.stdout
xmlcont=input_xml.read()
input_xml.close()
xmlcont=xmlcont.replace('localId','dataPackageId')
output_file = open(test_file,w)
output_file.write(xmlcont)
output_file.close()
f_open=open(f_open_out, 'w')
logfile=open(log,w)
sys.stdout = f_open
After this i have to parse the new xml file which is in
output_file .hence
input_xml_sec = open(output_file,'r')
xmldoc = minidom.parse(input_xml_sec)
But i am getting an error on this line
(input_xml_sec = open(output_file,'r')).I have tried to figure out
but
not able to debug.Can someone throw some light or anything they feel
could be going wrong somewhere.
How do i capture the error as it vanishes very
qucikly when i run through command prompt,(the idle envir gives
indentation errors for no reason(which runs perfectly from cmd
prompt),hence i dont run using conventional F5.
http://docs.python.org/tut/
Read carefully.
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Re: How to do basic CRUD apps with Python
On May 14, 7:46 pm, James T. Dennis [EMAIL PROTECTED] wrote: Bruno Desthuilliers [EMAIL PROTECTED] wrote: walterbyrd a ?crit : With PHP, libraries, apps, etc. to do basic CRUD are everywhere. Ajax and non-Ajax solutions abound. With Python, finding such library, or apps. seems to be much more difficult to find. I thought django might be a good way, but I can not seem to get an answer on that board. I would like to put together a CRUD grid with editable/deletable/ addable fields, click on the headers to sort. Something that would sort-of looks like an online spreadsheet. It would be nice if the fields could be edited in-line, but it's not entirely necessary. Are there any Python libraries to do that sort of thing? Can it be done with django or cherrypy? You may want to have a look at turbogears's widgets. Admittedly I had to look up the meaning of CRUD in this context: (http://en.wikipedia.org/wiki/Create%2C_read%2C_update_and_delete create, read, update, and delete). I'm looking at Turbogears' Widgets in another window as I type this ... but it will be awhile before I can comment on how they might apply to the OP's needs. Actually I'm wholly unqualified to comment on his or her needs ... but I can comment on how I interpreted the question. Even with the SQLAlchemy SQLSoup examples there's still an annoying about of boilerplate coding that has to be done in order to create a web application for doing CRUD on a database. The missing element seems to be the ability to autogenerate web forms and reports with the requisite controls in them. Imagine, for a moment, being able to do something like: import sqlalchemy.ext.webcrud as crud db = crud.open() db.displayTopForm() 'HTML /HTML' ... and having a default top level web page generated with options to query the database (or some specific table in the database to be more specific, add new entries, etc). I'm thinking of some sort of class/module that would generate various sorts of HTML forms by default, but also allow one to sub-class each of the form/query types to customize the contents. It would use introspection on the database columns and constraints to automatically generate input fields for each of the columns and even fields for required foreign keys (or links to the CRUD for those tables?). Ideally it would also automatically hide autogenerated (index/key) fields, and map the table column IDs to form names (with gettext support for l10n of those). I think that's the sort of thing the OP was looking for. Not the ORM ... the the glue between the web framework and the ORM. -- Jim Dennis, Starshine: Signed, Sealed, Delivered Sounds like you're talking about rails. Do any of the python packages compare with the ease of rails? I got in just deep enough to see the possibilities of it, and then had to stop to do real work in php. I'd be very interested in Python on Rails! ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: setting an attribute
On May 16, 12:34 am, 7stud [EMAIL PROTECTED] wrote:
When you bind (on either a class or an instance) an attribute whose
name is not special...you affect only the __dict__ entry for the
attribute(in the class or instance, respectively).
In light of that statement, how would one explain the output of this
code:
class Test(object):
x = [1, 2]
def __init__(self):
self.x[0] = 10
print Test.__dict__#{.'x':[1,2]}
t = Test()
print t.x #[10, 2]
print t.__dict__ #{}
print Test.__dict__#{.'x':[10,2]...}
It looks to me like self.x[0] is binding on an instance whose
attribute name is not special, yet it doesn't affect any __dict__
entry for the attribute in the instance--instead it is affecting a
__dict__ entry for the attribute in the class.
I think it's following scope rules. It can't find an attribute for
self.x in the instance. It then checks the class for the var and
finds it and sets it there. It would error otherwise...
class Test(object):
... def __init__(self):
... self.x[0] =7
...
t = Test()
Traceback (most recent call last):
File stdin, line 1, in module
File stdin, line 3, in __init__
AttributeError: 'Test' object has no attribute 'x'
~Sean
--
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Re: iteration doesn't seem to work ??
On May 16, 1:41 am, stef [EMAIL PROTECTED] wrote: hello, can someone tell me why the following iteration doesn't work, and how I should replace empty strings in a list with a default value. v ['123', '345', '', '0.3'] for items in v: ... if items=='': ... items='3' ... v ['123', '345', '', '0.3'] thanks, Stef Mientki Inside the loop, 'items' is no longer referencing the list...its a string. v = ['123', '4', '567', ''] for i in v: ... print type(i) ... type 'str'... This works for j,i in enumerate(v): ... if i=='': ... v[j] = '3' ... v ['123', '4', '567', '3'] ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: removing spaces between 2 names
On May 14, 11:00 pm, [EMAIL PROTECTED] wrote: Hi, Suppose i have a string stored in variable,how do i remove the space between them,like if i have the name: USDT request in a variable.i need USDTrequest,without any space . Thanks s = jk hij ght print .join(s.split( )) -- http://mail.python.org/mailman/listinfo/python-list
Re: Trying to choose between python and java
#3 Is there any equivalent to jfreechart and jfreereport (http://www.jfree.org for details) in python. ChartDirector http://www.advsofteng.com/download.html Again, not free for commercial use, but very versatile. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: transparent images
On May 15, 5:26 pm, [EMAIL PROTECTED] wrote:
Does any one know how to make a transparent image with specifically
PIL, but any standard python library will do. I need a spacer, and it
has to be transparent.
Thanks
Something like this...not my code...untested...
im = Image.open(image.jpg)
opacity = .5
if im.mode != 'RGBA':
im = im.convert('RGBA')
else:
im = im.copy()
alpha = im.split()[3]
alpha = ImageEnhance.Brightness(alpha).enhance(opacity)
im.putalpha(alpha)
~Sean
--
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Re: Removing part of string
On May 13, 10:56 pm, [EMAIL PROTECTED] wrote: Hi, I am parsing an xml file ,and one part of structure looks something like this: - COMPARAM id=_338 DDORef=_18 Semantics=timing PhysicalLink=Infotainment_Control_Bus_CAN SHORTNAMEInfotainment_Control_Bus_CAN_TIMEOUT_AX/SHORTNAME LONGNAMETimeout N_As/N_Ar/LONGNAME DESCRIPTIONTime from transmit request until a CAN frame transmit confirmation is received./DESCRIPTION /COMPARAM In my code i am extracting the data within LONGNAME,which is Timeout N_As/N_Ar.These tags repeat and will have different timer names..like - COMPARAM id=_339 DDORef=_18 Semantics=timing PhysicalLink=Infotainment_Control_Bus_CAN SHORTNAMEInfotainment_Control_Bus_CAN_TIMEOUT_BS/SHORTNAME LONGNAMETimeout N_Bs/LONGNAME DESCRIPTIONTime that the transmitter of a multi-frame message shall wait to receive a flow control (FC) frame before timing out with a network layer error./DESCRIPTION /COMPARAM I need to remove the words Timeout from the data,and take only the abbrevation..i.e.N_As/N_bs like that .In short i have to remove the words which come with name Time,and also the space which comes next to it. and take only the abbreviation.Can someone help me in this. Thanks Did you get elementtree working? -- http://mail.python.org/mailman/listinfo/python-list
Re: Path python versions and Macosx
On May 14, 4:46 am, andrea [EMAIL PROTECTED] wrote:
On 12 Mag, 01:09, [EMAIL PROTECTED] wrote:
On May 11, 1:36 pm, andrea [EMAIL PROTECTED] wrote:
Hi everyone,
I use python on macosx with textmate as editor (great program).
I also use macport to install unix programs from the command line and
I find it great too.
Well I would like to have all my modules in the path when I'm using
textmate AND when I use the commandline (ipython), but because
textmate and the command line use different python versions they also
search in different places..
I found somewhere to write .pythonrc.py like this
#!/usr/bin/env python
import sys
PATH='/opt/local/lib/python2.4/site-packages/'
sys.path.append(PATH)
del sys
But it doesn't work either, I also tried to append this
PATH=/Library/Frameworks/Python.framework/Versions/Current/bin:/opt/
local/lib/python2.4/site-packages:${PATH}
to .bash_profile but nothing.
Where should I set this variables??
Thanks a lot
You can set environment variables for gui apps with this
freeware:http://www.versiontracker.com/dyn/moreinfo/macosx/15073
You can edit some text files as well, but this thing just makes it
much easier.
~Sean
Ok thanks, but why it doesn't work setting the .bash_profile?? What
should I set manually theorically?? The problem is also that I have
many modules for python 2.4 and trying to import them from the 2.5 of
course gives errors..
I installed them with macports (compiling), how can I make them switch
to 2.5???
thanks
Gui applications are not launched through the bash shell.
The .bash_profile never gets read.
You can accomplish the same thing as the freewware app I mentioned by
editing the xml file at ~/.MacOSX/environment.plist. Its a simple xml
file with keys and their corresponding values.
Not sure about the modules. You can force a script to look for libs
in a given directory like you mentioned, but that needs to go at the
top of each python file instead of a .pythonrc file. Maybe the
modules will work with 2.5, maybe not.
~Sean
--
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Re: __dict__ for instances?
On May 13, 4:30 am, Ivan Voras [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: I think you want dir(instance) __dict__ returns the instance Part of the problem is that dir(instance) returns a list of strings, so iterating the dir(instance) gets me strings, not methods. Alternatively, is there a way to get a bound instance by its name - some introspection function perhaps? variables and values as a dictionary, but doesn't return methods. It does on a Class :( -- (\__/) (O.o) ( ) This is Bunny. Copy Bunny into your signature to help him on his way to world domination! signature.asc 1KDownload I tried. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Creating a function to make checkbutton with information from a list?
On May 12, 11:04 am, Thomas Jansson [EMAIL PROTECTED] wrote: Dear all I am writing a program with tkinter where I have to create a lot of checkbuttons. They should have the same format but should have different names. My intention is to run the functions and the create all the buttons with the names from the list. I now the lines below doesn't work, but this is what I have so far. I don't really know how call the element in the dict use in the for loop. I tried to call +'item'+ but this doesn't work. def create_checkbox(self): self.checkbutton = [LNCOL, LFORM, LPOT, LGRID, LERR, LCOMP] for item in self.checkbutton: self.+'item'+Checkbutton = Chekcbutton(frame, onvalue='t', offvalue='f', variable=self.+'item'+) self.+'item'+Checkbutton.grid() How should I do this? Kind regards Thomas Jansson You can use exec(self. + name + = + value) to do what you want, but then you need to exec() each time you want to access the variable. I think it is much better to create a class. Here's what I came up with: from Tkinter import * class Window(Frame): def __init__(self, parent=None): Frame.__init__(self,parent=None) self.names = [LNCOL, LFORM, LPOT, LGRID, LERR, LCOMP, Sean] self.checkbuttons = [] self.f = Frame(root) for name in self.names: self.checkbuttons.append(CButton(parent=self.f, name=name, default=f)) self.f.pack(side=top,padx=5, pady=5) class CButton(object): def __init__(self, parent=None, name=None, default=None): self.name = name self.parent = parent self.variable = StringVar() self.variable.set(default) self.checkbutton = None self.create_checkbox(name) def create_checkbox(self,name): f = Frame(self.parent) Label(f, text=name).pack(side=left) self.checkbutton = Checkbutton(f, onvalue='t', offvalue='f', variable=self.variable) self.checkbutton.bind(Button-1, self.state_changed) self.pack() f.pack() def pack(self): self.checkbutton.pack() def state_changed(self, event=None): print %s: %s % (self.name, self.variable.get()) if __name__ == '__main__': root = Tk() Window().mainloop() ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: __dict__ for instances?
On May 12, 5:20 pm, Ivan Voras [EMAIL PROTECTED] wrote:
While using PyGTK, I want to try and define signal handlers
automagically, without explicitly writing the long dictionary (i.e. I
want to use signal_autoconnect()).
To do this, I need something that will inspect the current self and
return a dictionary that looks like:
{
method_name : self.method_name
}
Class.__dict__ does something very similar, but when I use it, either
I'm doing something wrong or it doesn't return methods bound to self,
and python complains a wrong number of arguments is being passed to the
methods (one instead of two).
instance.__dict__ on the other hand returns an empty dictionary.
This looks like it should be easy, but I can't find the solution :(
--
(\__/)
(O.o)
( )
This is Bunny.
Copy Bunny into your signature to help him on his way to world domination!
signature.asc
1KDownload
I think you want dir(instance) __dict__ returns the instance
variables and values as a dictionary, but doesn't return methods.
dir() returns a list of the instance's methods and variables. Then
you'd need to iterate over the list with type() looking for instance
methods
instance = Class.Class()
dict = {}
methods = [f for f in dir(instance) if str(type(instance.f)) == type
'instancemethod']
for m in methods:
dict[m.name] = m
The above is untested. I'm sure there is a better way to do this.
~Sean
--
http://mail.python.org/mailman/listinfo/python-list
Re: module error for elementtree
On May 11, 12:05 am, [EMAIL PROTECTED] wrote: #!/usr/bin/env python from elementtree import ElementTree as Element tree = et.parse(testxml.xml) for t in tree.getiterator(SERVICEPARAMETER): if t.get(Semantics) == localId: t.set(Semantics, dataPackageID) tree.write(output.xml) Hi, For the above code to work elementtree is imported in first line ,but when running it says : ImportError: No module named elementtree.ElementTree Does thie module exists as default or a patch is needed? Thanks http://groups.google.com/group/comp.lang.python/browse_frm/thread/e095cc79d1efb99/a4523a6e9b7061af?rnum=1#a4523a6e9b7061af Read carefully. -- http://mail.python.org/mailman/listinfo/python-list
Re: Path python versions and Macosx
On May 11, 1:36 pm, andrea [EMAIL PROTECTED] wrote:
Hi everyone,
I use python on macosx with textmate as editor (great program).
I also use macport to install unix programs from the command line and
I find it great too.
Well I would like to have all my modules in the path when I'm using
textmate AND when I use the commandline (ipython), but because
textmate and the command line use different python versions they also
search in different places..
I found somewhere to write .pythonrc.py like this
#!/usr/bin/env python
import sys
PATH='/opt/local/lib/python2.4/site-packages/'
sys.path.append(PATH)
del sys
But it doesn't work either, I also tried to append this
PATH=/Library/Frameworks/Python.framework/Versions/Current/bin:/opt/
local/lib/python2.4/site-packages:${PATH}
to .bash_profile but nothing.
Where should I set this variables??
Thanks a lot
You can set environment variables for gui apps with this freeware:
http://www.versiontracker.com/dyn/moreinfo/macosx/15073
You can edit some text files as well, but this thing just makes it
much easier.
~Sean
--
http://mail.python.org/mailman/listinfo/python-list
Re: os.popen on windows: loosing stdout of child process
On May 11, 8:46 pm, Greg Ercolano [EMAIL PROTECTED] wrote: When I use os.popen(cmd,'w'), I find that under windows, the stdout of the child process disappears, instead of appearing in the DOS window the script is invoked from. eg: C:\ type foo.py import os import sys file = os.popen(nslookup, 'w') file.write(google.com\n) file.close() C:\ python foo.py -- nothing is printed C:\ This just seems wrong. The following DOS equivalent works fine: C:\ echo google.com | nslookup Default Server: dns.erco.x Address: 192.168.1.14 [..expected output..] When I run the same python program on a unix box, the output from 'nslookup' appears in the terminal, as I'd expect. Shouldn't popen() be consistent in its handling of the child's stdout and stderr across platforms? Maybe I'm missing something, being somewhat new to python, but an old hand at unix and win32 and functions like popen(). Didn't see anything in the docs for popen(), and I googled around quite a bit on the web and groups for eg. 'python windows popen stdout lost' and found nothing useful. FWIW, I'm using the windows version of python 2.5 from activestate. Glad to see you're finally coming into the light Greg! I've used Rush in a few different studios over the past couple of years. We even had sushi once. :) I'm no expert like you, but I think I can point you in the right direction. You need os.popen2 which returns a tuple of file-like objects. The first pointing to stdin, and the second pointing to stdout. Write to stdin, and read from stdout. import os import sys stdin, stdout = os.popen2(nslookup) stdin.write(google.com\n) stdin.close() print stdout.read() stdout.close() I don't use windows much, but I believe the os.popen functionality is being replaced by subprocess.Popen: from subprocess import * import sys p = Popen(nslookup, shell=True, bufsize=1024, stdin=PIPE, stdout=PIPE, close_fds=True) p.stdin.write(google.com\n) p.stdin.close() print p.stdout.read() p.stdout.close() I found these: http://pydoc.org/2.4.1/subprocess.html http://docs.python.org/lib/module-subprocess.html ~Sean DiZazzo Curious George -- http://mail.python.org/mailman/listinfo/python-list
Re: replacing string in xml file--revisited
On May 10, 12:56 am, [EMAIL PROTECTED] wrote: Hi, I need to replace a string in xml file with something else.Ex - SERVICEPARAMETER id=_775 Semantics=subfunction DDORef=_54 SHORTNAMErate/SHORTNAME LONGNAMErate/LONGNAME VALUE role=constant DataType=unsigned value=1 / BYTEPOSITION role=position BytePos=1 / /SERVICEPARAMETER - SERVICEPARAMETER id=_776 Semantics=localId DDORef=_54 Here i have opened an xml file(small part is pasted here).I want to replace the word 'localId' with 'dataPackageID' wherever it comes in xml file.I have asked this before and got a code: input_file = open(filename) xmlcontents = input_file.read() input_file.close() xmlcontents = xmlcontents.replace(spam, eggs) output_file = open(filename,w) output_file.write(xmlcontents) output_file.close() Although this works alone it is nto working when i handle multiple file I/O.Is there a alternative to do this.(maybe without read() operation) Thanks try this... #!/usr/bin/env python from elementtree import ElementTree as et tree = et.parse(testxml.xml) for t in tree.getiterator(SERVICEPARAMETER): t.set(Semantics, localId) tree.write(output.xml) ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: replacing string in xml file--revisited
On May 10, 12:56 am, [EMAIL PROTECTED] wrote: Hi, I need to replace a string in xml file with something else.Ex - SERVICEPARAMETER id=_775 Semantics=subfunction DDORef=_54 SHORTNAMErate/SHORTNAME LONGNAMErate/LONGNAME VALUE role=constant DataType=unsigned value=1 / BYTEPOSITION role=position BytePos=1 / /SERVICEPARAMETER - SERVICEPARAMETER id=_776 Semantics=localId DDORef=_54 Here i have opened an xml file(small part is pasted here).I want to replace the word 'localId' with 'dataPackageID' wherever it comes in xml file.I have asked this before and got a code: input_file = open(filename) xmlcontents = input_file.read() input_file.close() xmlcontents = xmlcontents.replace(spam, eggs) output_file = open(filename,w) output_file.write(xmlcontents) output_file.close() Although this works alone it is nto working when i handle multiple file I/O.Is there a alternative to do this.(maybe without read() operation) Thanks After reading your post again, this might be better: #!/usr/bin/env python from elementtree import ElementTree as et tree = et.parse(testxml.xml) for t in tree.getiterator(SERVICEPARAMETER): if t.get(Semantics) == localId: t.set(Semantics, dataPackageID) tree.write(output.xml) ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: replacing string in xml file--revisited
On May 10, 4:21 am, [EMAIL PROTECTED] wrote: On May 10, 1:55 pm, [EMAIL PROTECTED] wrote: On May 10, 12:56 am, [EMAIL PROTECTED] wrote: Hi, I need to replace a string in xml file with something else.Ex - SERVICEPARAMETER id=_775 Semantics=subfunction DDORef=_54 SHORTNAMErate/SHORTNAME LONGNAMErate/LONGNAME VALUE role=constant DataType=unsigned value=1 / BYTEPOSITION role=position BytePos=1 / /SERVICEPARAMETER - SERVICEPARAMETER id=_776 Semantics=localId DDORef=_54 Here i have opened an xml file(small part is pasted here).I want to replace the word 'localId' with 'dataPackageID' wherever it comes in xml file.I have asked this before and got a code: input_file = open(filename) xmlcontents = input_file.read() input_file.close() xmlcontents = xmlcontents.replace(spam, eggs) output_file = open(filename,w) output_file.write(xmlcontents) output_file.close() Although this works alone it is nto working when i handle multiple file I/O.Is there a alternative to do this.(maybe without read() operation) Thanks After reading your post again, this might be better: #!/usr/bin/env python from elementtree import ElementTree as et tree = et.parse(testxml.xml) for t in tree.getiterator(SERVICEPARAMETER): if t.get(Semantics) == localId: t.set(Semantics, dataPackageID) tree.write(output.xml) ~Sean- Hide quoted text - - Show quoted text - which module should be imported for above to work,it says ImportError: No module named elementtree Thanks You can either 1) upgrade to python 2.5 which includes the elementtree module or 2) download and add the module to your current installation http://effbot.org/zone/element-index.htm ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie look at Python and OO
walterbyrd wrote: I learned to program with Pascal, way back when. Went into software development for a while, then went into systems admin. Have programmed in several languages, just learning Python. Some things I find odd: 1) 5/-2 == -3? 2) list assignment handling, pointing two vars to the same list: With simple data types: a = 5 b = a a = 3 a,b (3, 5) Which is what I'd expect, since I have changed a, but not b. But with lists: a = list(1234) b = a a.append(5) a,b (['1', '2', '3', '4', '5'], ['1', '2', '3', '4', '5']) b changes even though I have not touched b. I know why, but this is not what I would ordinarilly expect, it does not seem intuitive. And, IMO, it gets worse: a = list(1234) b = a a = a + ['5'] a,b (['1', '2', '3', '4', '5'], ['1', '2', '3', '4']) Sometimes changing a changes b, and sometimes not. You also have to remember that subseqent changes to a will not change b - after some operation but not others. To those who think in Python, I'm sure this all seems normal. But, having programmed in about one dozen other language, this seems downright bizare to me. I know why it works like this, but it seems like an odd way to do things. 3) ambiguous use of the form: this.that() Sometimes, this.that() means module.funcion() as in: os.dirlist(.) Other times, this is sort of like a parameter to the that function: a = list(1234) _.join(a) '1_2_3_4_5' And still other times, is seems that this is an object, acted upon by that : a = list(1234) b = _.join(a) b.split(_) ['1', '2', '3', '4', '5'] BTW: it seems a bit odd to that the positions of the string, and the delimitor, are reversed between the complementory functions join(), and split(). I suppose if it weren't for OO, we have something terribly complicated, like: split(str, _) join(str, _) Again, those who think in Python, will understand right away that: math.count(x) is counting the substring x in the math string. But can you see where that might be confused to be a function called count() in the math module? I'm not complaining. Python is a great language in many respects. But, I would take some issue with those claiming Python is intuitive and easy. IMO: there seems to be many ambiguous, unintuitve, and confusing, aspects to Python. These conversations are funny to me. I use Python every day and I have never actually thought about the implications of binding objects to names, or two names pointing to the same object. Problems of this sort just never come up in actual programming for me. It just works. Python was my virgin language, so maybe that just makes it natural to me, but it seems like people coming from other languages get hung up on testing out the differences and theories rather than just programming in it. Alas, maybe I have yet to get deep enough to run into these kinds of problems. The question of what math is in math.count(x) makes sense, but this one never comes up either (or rarely). I usually know what the object is that I'm working with. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie look at Python and OO
On May 10, 2:21 pm, [EMAIL PROTECTED] wrote: walterbyrd wrote: I learned to program with Pascal, way back when. Went into software development for a while, then went into systems admin. Have programmed in several languages, just learning Python. Some things I find odd: 1) 5/-2 == -3? 2) list assignment handling, pointing two vars to the same list: With simple data types: a = 5 b = a a = 3 a,b (3, 5) Which is what I'd expect, since I have changed a, but not b. But with lists: a = list(1234) b = a a.append(5) a,b (['1', '2', '3', '4', '5'], ['1', '2', '3', '4', '5']) b changes even though I have not touched b. I know why, but this is not what I would ordinarilly expect, it does not seem intuitive. And, IMO, it gets worse: a = list(1234) b = a a = a + ['5'] a,b (['1', '2', '3', '4', '5'], ['1', '2', '3', '4']) Sometimes changing a changes b, and sometimes not. You also have to remember that subseqent changes to a will not change b - after some operation but not others. To those who think in Python, I'm sure this all seems normal. But, having programmed in about one dozen other language, this seems downright bizare to me. I know why it works like this, but it seems like an odd way to do things. 3) ambiguous use of the form: this.that() Sometimes, this.that() means module.funcion() as in: os.dirlist(.) Other times, this is sort of like a parameter to the that function: a = list(1234) _.join(a) '1_2_3_4_5' And still other times, is seems that this is an object, acted upon by that : a = list(1234) b = _.join(a) b.split(_) ['1', '2', '3', '4', '5'] BTW: it seems a bit odd to that the positions of the string, and the delimitor, are reversed between the complementory functions join(), and split(). I suppose if it weren't for OO, we have something terribly complicated, like: split(str, _) join(str, _) Again, those who think in Python, will understand right away that: math.count(x) is counting the substring x in the math string. But can you see where that might be confused to be a function called count() in the math module? I'm not complaining. Python is a great language in many respects. But, I would take some issue with those claiming Python is intuitive and easy. IMO: there seems to be many ambiguous, unintuitve, and confusing, aspects to Python. These conversations are funny to me. I use Python every day and I have never actually thought about the implications of binding objects to names, or two names pointing to the same object. Problems of this sort just never come up in actual programming for me. It just works. Python was my virgin language, so maybe that just makes it natural to me, but it seems like people coming from other languages get hung up on testing out the differences and theories rather than just programming in it. Alas, maybe I have yet to get deep enough to run into these kinds of problems. The question of what math is in math.count(x) makes sense, but this one never comes up either (or rarely). I usually know what the object is that I'm working with. ~Sean After thought: I do run into problems testing boolean values on a regular basis. Probably should learn all the rules on them and use them properly, but as a general rule I just don't use them, and test for the value instead. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Checking if string inside quotes?
On May 9, 1:39 pm, Michael Yanowitz [EMAIL PROTECTED] wrote: Hello: If I have a long string (such as a Python file). I search for a sub-string in that string and find it. Is there a way to determine if that found sub-string is inside single-quotes or double-quotes or not inside any quotes? If so how? Thanks in advance: Michael Yanowitz I think the .find() method returns the index of the found string. You could check one char before and then one char after the length of the string to see. I don't use regular expressions much, but I'm sure that's a more elegant approach. This will work. You'll get in index error if you find the string at the very end of the file. s = foo bar findme = foo index = s.find(findme) if s[index-1] == ' and s[index+len(findme)] == ': print single quoted elif s[index-1] == \ and s[index+len(findme)] == \: print double quoted else: print unquoted ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: File I/O
On May 9, 2:13 pm, HMS Surprise [EMAIL PROTECTED] wrote: If one has a list of lists such as lst = [['a','1'],['b','2']] is there a standard python idiom for writing and reading the pairs to/ from a file? Thanks, jh These work. Assuming you can choose the format. Or you could pickle the list. write lst = [['a','1'],['b','2']] file = open(file, 'w') [file.write(item[0] + \t + item[1] + \n) for item in lst] file.close() read lst = [] file = open(file, 'r') [lst.append(list(line.split())) for line in file] file.close() print lst ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Checking if string inside quotes?
On May 9, 2:31 pm, Michael Yanowitz [EMAIL PROTECTED] wrote:
Thanks, but it is a little more complicated than that,
the string could be deep in quotes.
The problem is in string substitution.
Suppose I have a dictionary with MY_IP : 172.18.51.33
I need to replace all instances of MY_IP with 172.18.51.33
in the file.
It is easy in cases such as:
if (MY_IP == 127.0.0.1):
But suppose I encounter:
((size==23) and (MY_IP==127.0.0.1))
In this case I do not want:
((size==23) and (172.18.51.33==127.0.0.1))
but:
((size==23) and (172.18.51.33==127.0.0.1))
without the internal quotes.
How can I do this?
I presumed that I would have to check to see if the string
was already in quotes and if so remove the quotes. But not
sure how to do that?
Or is there an easier way?
Thanks in advance:
Michael Yanowitz
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf
Of [EMAIL PROTECTED]
Sent: Wednesday, May 09, 2007 5:12 PM
To: [EMAIL PROTECTED]
Subject: Re: Checking if string inside quotes?
On May 9, 1:39 pm, Michael Yanowitz [EMAIL PROTECTED] wrote:
Hello:
If I have a long string (such as a Python file).
I search for a sub-string in that string and find it.
Is there a way to determine if that found sub-string is
inside single-quotes or double-quotes or not inside any quotes?
If so how?
Thanks in advance:
Michael Yanowitz
I think the .find() method returns the index of the found string. You
could check one char before and then one char after the length of the
string to see. I don't use regular expressions much, but I'm sure
that's a more elegant approach.
This will work. You'll get in index error if you find the string at
the very end of the file.
s =
foo
bar
findme = foo
index = s.find(findme)
if s[index-1] == ' and s[index+len(findme)] == ':
print single quoted
elif s[index-1] == \ and s[index+len(findme)] == \:
print double quoted
else:
print unquoted
~Sean
--http://mail.python.org/mailman/listinfo/python-list
In that case I suppose you'd have to read the file line by line and if
you find your string in the line then search for the indexes of any
matching quotes. If you find matching quotes, see if your word lies
within any of the quote indexes.
#!/usr/bin/env python
file = open(file, 'r')
findme= foo
for j, line in enumerate(file):
found = line.find(findme)
if found != -1:
quotecount = line.count(')
quoteindexes = []
start = 0
for i in xrange(quotecount):
i = line.find(', start)
quoteindexes.append(i)
start = i+1
f = False
for i in xrange(len(quoteindexes)/2):
if findme in
line[quoteindexes.pop(0):quoteindexes.pop(0)]:
f = True
print Found %s on line %s: Single-Quoted % (findme, j
+1)
if not f:
print Found %s on line %s: Not quoted % (findme, j+1)
It's not pretty but it works.
~Sean
--
http://mail.python.org/mailman/listinfo/python-list
Re: long lists
On May 7, 5:14 am, Merrigan [EMAIL PROTECTED] wrote: On May 7, 10:18 am, Steven D'Aprano [EMAIL PROTECTED] wrote: On Mon, 07 May 2007 00:28:14 -0700, Merrigan wrote: 1. I have the script popping all the files that need to be checked into a list, and have it parsing the list for everything...Now the problem is this : The sever needs to check (at the moment) 375 files and eliminate those that don't need reuploading. This number will obviously get bigger and bigger as more files gets uploaded. Now, the problem that I'm having is that the script is taking forever to parse the list and give the final result. How can I speed this up? By writing faster code??? It's really hard to answer this without more information. In particular: - what's the format of the list and how do you parse it? - how does the script decide what files need uploading? -- Steven. Hi, Thanx for the reply, The Script it available at this url :http://www.lewendewoord.co.za/theScript.py P.S. I know it looks like crap, but I'm a n00b, and not yet through the OOP part of the tutorial. Thanx in advance! Do you have access to the machine via ssh? I would try to get away from FTP and use rsync for this kind of thing if possible. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: progress
On May 5, 1:46 am, Merrigan [EMAIL PROTECTED] wrote: Hi All, I have posted yesterday about an ftplib issue, this has been resolved. I actually want to ask something here... The script that that ftplib error was from...I was wondering - What do I need to do to print the stats (speed/s, percentage done) of the upload that is running on the monitor. This script runs on a Fedora Machine. Thanx for the help guys! -- Merrigan Looks like all you've got on the Python side is the size() method. You could start a timer when the transfer begins, and then compare the size on the server versus the size locally to get progress. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: ScrolledText?
On May 1, 3:12 pm, nik [EMAIL PROTECTED] wrote: I've been trying to get the scrollbar and text box always going to the last line and have been completely unsuccessful. I've tried, ScrolledText, text.see, and text.yview_pickplace without success for instance this was the last setup: self.text = ScrolledText(master, relief=RIDGE) self.text.grid(column=1, row=2, columnspan=10,\ rowspan=5, pady=10, sticky=NSEW) with this text entry: self.text.insert(END, ins) self.text.yview_pickplace(end) Can anybody please tell me what I might be doing wrong, or an example that works, so that I can see what's going wrong. Thanks, Nik try... self.text.yview_moveto(1) ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: os.path.join
On May 1, 11:10 pm, Gabriel Genellina [EMAIL PROTECTED] wrote: En Wed, 02 May 2007 02:31:43 -0300, [EMAIL PROTECTED] escribió: A better question is why this doesn't work. pathparts = [/foo, bar] os.path.join(pathparts) ['/foo', 'bar'] This should return a string in my opinion. I think it's a bug, but because it should raise TypeError instead. The right usage is os.path.join(*pathparts) -- Gabriel Genellina Wow. What exactly is that * operator doing? Is it only used in passing args to functions? Does it just expand the list into individual string arguments for exactly this situation? Or does it have other uses? ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: os.path.join
On May 2, 12:36 am, Ant [EMAIL PROTECTED] wrote:
On May 2, 8:03 am, [EMAIL PROTECTED] wrote:
On May 1, 11:10 pm, Gabriel Genellina [EMAIL PROTECTED]
...
I think it's a bug, but because it should raise TypeError instead.
The right usage is os.path.join(*pathparts)
...
Wow. What exactly is that * operator doing? Is it only used in
passing args to functions? Does it just expand the list into
individual string arguments for exactly this situation? Or does it
have other uses?
It's used for unpacking a collection into arguments to a function.
It's also used at the other end for receiving a variable length set of
arguments. i.e.
x = (1,3)
def add(a, b):
return a + b
add(*x)
4
def add(*args):
return reduce(int.__add__, args)
add(1,2,3,4,5,6)
21
add(*x)
4
The same sort of thing holds for keyword arguments:
def print_kw(**kw):
for k in kw:
print kw[k]
print_kw(a=1, b=2)
1
2 d = {'a': 1, 'b': 10, 'c': 100}
print_kw(**d)
1
100
10
Thank you both.
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Re: os.path.join
On May 1, 9:23 pm, Elliot Peele [EMAIL PROTECTED] wrote:
On Tue, 2007-05-01 at 19:27 -0700, 7stud wrote:
On May 1, 7:36 pm, Elliot Peele [EMAIL PROTECTED] wrote:
Why does os.path.join('/foo', '/bar') return '/bar' rather than
'/foo/bar'? That just seems rather counter intuitive.
Elliot
join( path1[, path2[, ...]])
Join one or more path components intelligently. If any component is an
absolute path, all previous components (on Windows, including the
previous drive letter, if there was one) are thrown away...
Yes, but that still doesn't answer my question as to why os.path.join
works that way. I understand that that is how it is written, but why?
Elliot
It makes perfect sense. You are joining two paths that both begin at
the root directory. The second path is overwriting the first because
they can't both begin at the root and also be parts of one path.
A better question is why this doesn't work.
pathparts = [/foo, bar]
os.path.join(pathparts)
['/foo', 'bar']
This should return a string in my opinion.
~Sean
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Re: I can't inherit from compiled classes ?
On Apr 29, 12:48 pm, Maxim Veksler [EMAIL PROTECTED] wrote: Hello list, I'm trying to subclass socket and select, for both I get: TypeError: Error when calling the metaclass bases module.__init__() takes at most 2 arguments (3 given) , I don't understand this error. Why would python try to pass 3 arguments (what are they) ? Googling for this error gave random results talking about try to inherit a Package but socket is definitely a class, (/usr/lib/python2.4/socket.py). Not sure about select thought. I've did the following to receive the error: In [1]: import socket In [2]: class PollingSocket(socket): ...: pass ...: --- exceptions.TypeError Traceback (most recent call last) /home/hq4ever/ipython console TypeError: Error when calling the metaclass bases module.__init__() takes at most 2 arguments (3 given) What am I breaking wrong? Thank you, Maxim. -- Cheers, Maxim Veksler Free as in Freedom - Do u GNU ? Try: import socket class PollingSocket(socket.socket): pass ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Widget to read in user input box in blog
On Apr 23, 6:57 pm, [EMAIL PROTECTED] wrote: Hey, I am helping to develop a project that displays images based on user input. One possible way of implementing this is via a widget that when it is run, would read in the users input from an input text field (probably from a blog), and replace it with the HTML that would display those images. This is more a proof of concept, so really all I am wondering is if there is a good way in Python to read in the text the user has typed and change it before the user hits submit? Thanks Here's another way. Although I'm not really sure whether you are talking about a web app or a local gui app. #! /usr/bin/env python from Tkinter import * class Window(Frame): def __init__(self, parent=None): Frame.__init__(self, parent) Label(self, text=Enter the path to a gif).pack(padx=5, pady=5) self.label = Label(self, text=) self.label.pack(padx=5, pady=5) self.entry = Entry(self, text=) self.entry.pack(padx=5, pady=5) self.pack() self.update() def update(self): try: self.image = PhotoImage(file=self.entry.get()) self.label.config(image=self.image) except TclError: self.label.config(text=self.entry.get(), image=) self.after(20, self.update) if __name__ == '__main__': root = Tk() Window().mainloop() ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Redirection problem
On Apr 23, 9:10 am, CSUIDL PROGRAMMEr [EMAIL PROTECTED] wrote:
I am new to python. so be patient with me
I am trying to redirect the output of os.popen command to a file. I
want to append to that file. but instead of appending. The file only
shows last command that was writtenn to it.
filehandle= open(/root/yhpc-2.0/installer/yhpc-log ,a+);
filehandle.write( Command executed is + cmd);
try:
pipe= os.popen('%s /root/yhpc-2.0/installer/yhpc-log' %cmd );
except : IOError;
filehandle.close();
Any suggestion would help.
filehandle.close();
This works.
f = open(test, 'a')
stdout = os.popen(ls -l /)
f.write(stdout.read())
f.close()
~Sean
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Re: Generate report containing pdf or ps figures?
On Apr 23, 9:30 am, Grant Edwards [EMAIL PROTECTED] wrote: I need to be able to generate a PDF report which consists mostly of vector images (which I can generate as encapsulated Postscript, PDF, or SVG). What I need is a way to combine these figures into a single PDF document. Right now the reports consist entire of these figures, so I just write the figures out to temp files and then use os.system() to run ghostscript with appropriate options to combine them into a single PDF file. I'd like to be able to add some text and/or place the figures in a manner other than one per page in the output document. I've looked at ReportLab's documentation, but although it appears to be able to use bitmap images (e.g jpeg) it doesn't appear to be able to use vector images (EPS/PDF/SVG). Is there a PDF generation library that can place EPS or PDF figures on a page? -- Grant Edwards grante Yow! Is a tattoo real, like at a curb or a battleship? visi.comOr are we suffering in Safeway? On a Mac... http://developer.apple.com/graphicsimaging/pythonandquartz.html ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: recursion depth problem
On Apr 22, 11:49 am, proctor [EMAIL PROTECTED] wrote: hello, i have a small function which mimics binary counting. it runs fine as long as the input is not too long, but if i give it input longer than 8 characters it gives RuntimeError: maximum recursion depth exceeded in cmp i'm not too sure what i am doing improperly. is there really a lot of recursion in this code? == import sys def ch4(item, n=0): if n len(item): if item[n] == '0': item[n] = '1' print ''.join(item) ch4(item) elif item[n] == '1': item[n] = '0' ch4(item, n+1) ch4(list(sys.argv[1])) == this function expects input in the form of a string of zeros, like this: python test-bin.py and is expected to output a list of permutations like this: $ python test-bin.py 1000 0100 1100 0010 1010 0110 1110 0001 1001 0101 1101 0011 1011 0111 thanks for all help! sincerely, proctor If you just want to make it work as ischeck sys.setrecursionlimit() ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: About installing new Python version.
On Apr 19, 2:03 am, king kikapu [EMAIL PROTECTED] wrote: Hi to all, i started with Python at v2.5 and now i see that a new version is released. As i already have a lot of stuff for Python installed in the site- packages directory, which is the correct way to install a new Python version without do any damage ? Remove Python and ALL Python related software and install them all over again (painful)? Remove Python and do not touch anything else and install new version on top of them at the same directory ? Any other choice available ? Thanks a lot for any help! Just install the new version. It should link everything back up so the new version is active, but the old versions are intact. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: NFS Help
On Apr 19, 11:32 am, Clement [EMAIL PROTECTED] wrote: how to get the file from NFS share in python.. You need to be more specific. If you just want to copy a file try shutil http://docs.python.org/lib/module-shutil.html ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: image sequence to Quicktime movie
I haven't experimented with it myself, but you'll probably find what you need here. (Only works on original mac python distribution) [sean:~] sean% python Python 2.3.5 (#1, Aug 12 2006, 00:08:11) [GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin Type help, copyright, credits or license for more information. from Carbon import Qt dir(Qt) ['AddSoundDescriptionExtension', 'AddTime', 'AlignWindow', 'CanQuickTimeOpenDataRef', 'CanQuickTimeOpenFile', 'ClearMoviesStickyError', 'CloseMovieFile', 'ConvertTime', 'ConvertTimeScale', 'CreateMovieFile', 'CreateShortcutMovieFile', 'DeleteMovieFile', 'DisposeMatte', 'DragAlignedWindow', 'EndFullScreen', 'EnterMovies', 'Error', 'ExitMovies', 'FlashMediaDoButtonActions', 'FlashMediaFrameLabelToMovieTime', 'FlashMediaFrameNumberToMovieTime', 'FlashMediaGetDisplayedFrameNumber', 'FlashMediaGetFlashVariable', 'FlashMediaGetRefConBounds', 'FlashMediaGetRefConID', 'FlashMediaGetSupportedSwfVersion', 'FlashMediaIDToRefCon', 'FlashMediaSetFlashVariable', 'FlashMediaSetPan', 'FlashMediaSetZoom', 'FlashMediaSetZoomRect', 'GetDataHandler', 'GetMovieImporterForDataRef', 'GetMoviesError', 'GetMoviesStickyError', 'GetSoundDescriptionExtension', 'Media', 'Media3DGetCameraAngleAspect', 'Media3DGetCameraData', 'Media3DGetCameraRange', 'Media3DGetCurrentGroup', 'Media3DRotateNamedObjectTo', 'Media3DScaleNamedObjectTo', 'Media3DSetCameraAngleAspect', 'Media3DSetCameraData', 'Media3DSetCameraRange', 'Media3DTranslateNamedObjectTo', 'MediaType', 'Movie', 'MovieController', 'MovieControllerType', 'MovieType', 'MoviesTask', 'MusicMediaGetIndexedTunePlayer', 'NewMovie', 'NewMovieFromDataFork', 'NewMovieFromDataFork64', 'NewMovieFromDataRef', 'NewMovieFromFile', 'NewMovieFromHandle', 'NewMovieFromScrap', 'NewTimeBase', 'NewUserData', 'NewUserDataFromHandle', 'OpenMovieFile', 'PasteHandleIntoMovie', 'QTDismissStandardParameterDialog', 'QTGetMIMETypeInfo', 'QTIsStandardParameterDialogEvent', 'QTNewAlias', 'QTRegisterAccessKey', 'QTStandardParameterDialogDoAction', 'QTTextToNativeText', 'QTUnregisterAccessKey', 'RemoveMovieResource', 'RemoveSoundDescriptionExtension', 'SpriteMediaCountImages', 'SpriteMediaCountSprites', 'SpriteMediaDisposeSprite', 'SpriteMediaGetActionVariable', 'SpriteMediaGetActionVariableAsString', 'SpriteMediaGetDisplayedSampleNumber', 'SpriteMediaGetImageName', 'SpriteMediaGetIndImageDescription', 'SpriteMediaGetProperty', 'SpriteMediaGetSpriteName', 'SpriteMediaGetSpriteProperty', 'SpriteMediaHitTestAllSprites', 'SpriteMediaHitTestOneSprite', 'SpriteMediaHitTestSprites', 'SpriteMediaSetActionVariable', 'SpriteMediaSetActionVariableToString', 'SpriteMediaSetProperty', 'SpriteMediaSetSpriteProperty', 'SpriteMediaSpriteIDToIndex', 'SpriteMediaSpriteIndexToID', 'SubtractTime', 'TextMediaAddHiliteSample', 'TextMediaAddTESample', 'TextMediaAddTextSample', 'TextMediaDrawRaw', 'TextMediaFindNextText', 'TextMediaGetTextProperty', 'TextMediaHiliteTextSample', 'TextMediaRawIdle', 'TextMediaRawSetup', 'TextMediaSetTextProperty', 'TextMediaSetTextSampleData', 'TimeBase', 'TimeBaseType', 'Track', 'TrackTimeToMediaTime', 'TrackType', 'UserData', 'UserDataType', 'VideoMediaGetCodecParameter', 'VideoMediaGetStallCount', 'VideoMediaGetStatistics', 'VideoMediaResetStatistics', 'VideoMediaSetCodecParameter', '__builtins__', '__doc__', '__file__', '__name__'] ~Sean On Apr 18, 10:16 am, Simon Cassels [EMAIL PROTECTED] wrote: did u ever find anything out about this ? if so can you help me with some leads i am trying to figure an action that can convert image files to quicktime automatically. cheers simon -- http://mail.python.org/mailman/listinfo/python-list
Re: Minimal Linux system to run Python
You basically just want to create a new startup mode, with only the needed modules loaded, and then set the system to boot up into that mode. I messed around with it a bit awhile ago, and managed to modify run-level 3 to accomplish what i wanted. After it had done one part of its thing, a python script would set the run-level to the one I had defined, reboot into that mode,and execute what I needed. When finished, it would change run-level back to 5 and restart to get the user back to where he was. I can't remember the exact paths, but the boot modes are at /etc/init.d/init5/ , init4, init3, etc. You can choose which is called at boot in a file called 'initconfig' I think. It will take some experimentation to figure out which modules are absolutely necessary for even python to run. It seems that I had some problems running the script in single-user mode, so I went to run- level 3 and modified it a bit. If you're still looking for help on Monday I can give you more details. ~Sean On Apr 14, 10:53 am, Chaz Ginger [EMAIL PROTECTED] wrote: I have a need for the minimal Linux system to run Python. Basically I want the system to boot up and instead of starting up Init/etc. I would love it to run python (and a python script I have written). Before embarking on doing it myself I was wondering if anyone knew of just such a system? Peace, Chaz -- http://mail.python.org/mailman/listinfo/python-list
Re: Prevent Modification of Script?
Just throw out the .py files and let it run on the .pyc's alone. ~Sean On Apr 4, 8:03 pm, James Stroud [EMAIL PROTECTED] wrote: ts-dev wrote: The root of my question is verifying the integrity of the application and the scripts being run. Google md5sum. Then google birthday attack. James -- http://mail.python.org/mailman/listinfo/python-list
Re: Circular Class Logic
Remove the line above and add this below: def initFoo(): import baz Foo.baz = baz.Baz() initFoo() I got it to work, but I had to add a check to see if the class variable had been set.. def initBaz(): import Baz Foo.baz = Baz.Baz() class Foo: baz = None def __init__(self): if Foo.baz == None: Foo.baz = True initBaz() What exactly is being accomplished by having the init function outside of the class? If there is no check, wouldn't it just execute every time an object is instantiated anyway? Instead of initFoo, you could use a custom metaclass. Or a class decorator (if and when they become available...) I haven't tried either of those yet. The names scare me. :) Sounds like this might be a good time to explore them. The code above is an effective way of doing what you want. But I'd think about the actual need of doing such things - are you sure it's a good design? I thought it was a good design, but now I'm not so sure. I'm untrained, so often I dont know the right way to do things. As I build this into the libraries, I'll keep an eye on how the code is developing and go from there.Thanks for the help! ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Circular Class Logic
Just initialize Folder at module level - see below. -- Paul class Disk(Folder): def __init__(self,driveLetter): super(Disk,self).__init__(driveLetter+:/) What is going on there? Is it just explicitly calling the super's init function? How is that really different from this: class Disk(Folder): def __init__(self,driveLetter): Folder.Folder.__init__(self.path) # ??? Being that Folder is the superclass? I'd like to be able to use the shared Disk objects in any class that is a subclass of Data. Will the above method still make the Disk objects available in File.py? Also, what if the classes are in different modules. I'll try to experiment with it this afternoon. I'm using more information than just the drive letter. What if the user wants to find out the unc path to the share given the drive letter, or copy a file to the local disk that is not a system disk that has the most available space on it, or wants to mount or unmount a network drive. pause... I'm trying to justify why the Folders/Files really need the drive info beyond just the paths and I'm having a hard time. I even just tried to give an example of how it would be used, and couldn't. It seems to make sense on a gut level, but maybe it's just as usefull on it's own. There's definitely justification for having Disks be a subclass of Folder, but not necessarily for there to be an instance of it available within the classes. All that kind of work will be external to the class. I think I'll backtrace and keep it separate. Thanks for letting me think it through. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Re: Circular Class Logic
How is that really different from this: class Disk(Folder): def __init__(self,driveLetter): Folder.Folder.__init__(self.path) # ??? Being that Folder is the superclass? Where did self.path come from? Even though Folder is the superclass, self.path doesn't exist until the Folder.__init__ method gets called. This ain't C++ you know. My bad. I should have said: class Disk(Folder): def __init__(self,driveLetter): Folder.Folder.__init__(self, driveLetter + :/) Knock yourself out. I just hacked together these Folder/Disk classes by way of a half-baked-but-working example. My point is that to initialize a class level variable on class Foo, all that is needed is to assign it in the defining module, that is: class Foo: pass Foo.fooClassVar = a class level variable Now any Foo or sub-Foo can access fooClassVar. The type of fooClassVar can be anything you want, whether it is a Foo, subclass of Foo or whatever, as long as it has been defined by the time you assign fooClassVar. That was the first thing I tried, but because the libs were importing each other, etc, it got hung up with wierd This module doesn't exist errors, when it clearly did. ~Sean -- http://mail.python.org/mailman/listinfo/python-list
Circular Class Logic
I have a set of classes that describe Files, Folders, etc., that I use
often in my scripts for moving files around, getting a files
extension, converting paths, changing permissions, etc It's very
similar to Jason Orendorff's 'Path' library, and is very useful to
me. The base class 'Data.py' stores all the basic attributes of any
piece of data on disk, and it is then subclassed to represent files
and folders with the attributes specific to that type of object.
I recently made a new class 'Disk.py' that is a subclass of
'Folder.py', to describe all of the attributes of any local or network
disks attached to the computer. I subclassed it from Folder, because
it really is a folder, it's just at the root of a drive. I'm
realizing that these 'Disk' objects are pretty useful, and I came up
with the idea to put a 'Disks' instance as a shared class variable
(singleton?) within the base class ('Data') The idea being that any
instance of a File, or Folder object would contain the list of Disk
objects attached to the system, and could use them accordingly. Also
important is that I would only need to gather the disk info once for
any given running application and all the instances could use it
(origianlly I was getting the disk info for each File/Folder object)
After an hour of banging my head from getting AttributeError:
'module' object has no attribute 'Disks' errors, I finally realized
that I'm trying to include an instance in the base class that is a
subclass of itself. Short of making 'Disk' no longer a subclass of
Folder, is there any other way to include a subclassed instance in the
base class of that object? (this is very hard to put in to words)
~Sean
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Re: Circular Class Logic
That is, each of the classes want to inherit from the others. That's not exactly what I'm doing, but your comment still might help. I actually want to include an instance of a subclass in it's superclass like this: = foo.py = import Baz class Foo: baz = Baz.Baz() def __init__(self): pass = = bar.py = import Foo class Bar(Foo.Foo): pass = = baz.py = import Bar class Baz(Bar.Bar): pass = The usual solution in these cases is to find the common required functionality and factor that out to a separate class that is then the superclass of two of the existing classes, breaking the circle. = wibble.py = # no dependencies class Wibble(object): pass = = foo.py = import wibble import bar class Foo(wibble.Wibble, bar.Bar): pass = = baz.py = import wibble class Baz(wibble.Wibble): pass = Note that Baz no longer subclasses foo.Foo, and both Foo and Baz get the common functionality they share from wibble.Wibble. I have to think about that for a bit and see if it makes sense to factor anything out. Thanks for the idea. Would that be the best solution considering the above description? ~Sean -- \ Buy not what you want, but what you need; what you do not need | `\ is expensive at a penny. -- Cato, 234-149 BC, Relique | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
