Re: Place the timer in Python script
Vamsikrishna wrote: How to place the timer in python code. timeit ... it's in the standard library: http://docs.python.org/library/timeit.html Cheers, Ju -- Whomever controls the press, owns history -- Johann Gutenberg -- http://mail.python.org/mailman/listinfo/python-list
Re: Python SSH interface
Mag Gam wrote: Is there something similar to NetSSH (http://search.cpan.org/dist/Net-SSH-Perl/) for python? I don't know much about perl modules functionalities, but paramiko might be what you are searching for. http://www.lag.net/paramiko/ Cheers Ju -- Those who do not understand Unix are condemned to reinvent it, poorly. -Henry Spencer -- http://mail.python.org/mailman/listinfo/python-list
Re: Video?
David C Ullrich wrote: ... Is that correct? If so is there some other standard Python windowing kit that does include some sort of video functionality? (Talking Ubuntu Linux if it matters.) I don't know about video and wxpython, but gstreamer has some python bindings (python-gst0.10 on jaunty). You may find a nice intro here: http://pygstdocs.berlios.de/ Hope this helped Ju -- True friends stab you in the front. -- http://mail.python.org/mailman/listinfo/python-list
Re: write iso 9660 with python
bryan rasmussen wrote: Hi, I need to read in a system of files and write them to an iso 9660, any libraries suited to this task that are up to date? Python 2.4 or 2.5 should be assumed. You could subprocess a call to cdrecord ... There are also python bindings for libburn ... http://icculus.org/burn/ but i never tested them HIH -- http://mail.python.org/mailman/listinfo/python-list
Re: Bytes/File Size Format Function
Ben Finney wrote: The symbol for bit is 'b'. The symbol for byte is 'B'. 'kb' is 'kilobit', i.e. 1000 bits. 'mb' is a metre-bit, a combination of two units. And so on. The SI units have definitions that are only muddied by misusing them this way. I have to disagree: 'mb' should stand for milli-bit :) which could be considered as the probability of a bit ... this might be useful for quantum computing. -- http://mail.python.org/mailman/listinfo/python-list
Re: SSH File Transfer Protocol or SFTP
Lad wrote: Is there a module in Python available that I can use for uploading files via SFTP (SSH File Transfer Protocol)? Or do you think that FTP protocol for files uploading is OK? Thank you for replies Lad. I believe there are many of those, personally i am using paramiko : http://www.lag.net/paramiko/ HIH -avell -- http://mail.python.org/mailman/listinfo/python-list
Re: dictionaries - returning a key from a value
Michael Malinowski wrote:
(snip)
However, I am curious to know if its possible to get the key from giving
a value (basically the opposite of what I did above, instead of getting
a value from a key, I want the key from a value). Is there a way of
doing this? Or would I need to cycle all the keys until I hit a value
match (which seems somewhat cumbersome).
(snip)
I believe you need to cycle through the entire dict (but that's what a
dict.method would do ... wouldn't it?) ... but it is really quickly
done using list comprehension (in Ipython shell here):
In [30]: sampledict={'the Holy Grail':'1975', 'Life of Brian':'1979',
'Party Political Broadcast':'1974','Mr. Neutron':'1974',
'Hamlet':'1974', 'Light Entertainment War':'1974'}
In [31]: sampledict Out[31]:
{'Hamlet': '1974',
'Life of Brian': '1979',
'Light Entertainment War': '1974',
'Mr. Neutron': '1974',
'Party Political Broadcast': '1974',
'the Holy Grail': '1975'}
In [32]: sampledict.get('the Holy Grail') Out[32]: '1975'
In [33]: sampledict['Mr. Neutron'] Out[33]: '1974'
In [34]: keys = [key for key in sampledict if sampledict[key] == '1974']
In [35]: keys
Out[35]:
['Mr. Neutron',
'Hamlet',
'Party Political Broadcast',
'Light Entertainment War']
HIH
Avell
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Re: Newbie question about numpy
Paul Johnston wrote: (snip) I noted the lack of matrices so installed numpy (snip) _ from numpy import * a = array([[1,2,3],[4,5,6],[1,2,3]]) b = array([[1,3,6],[2,5,1],[1,1,1]]) (snip) print a * b is \n, a * b _ (snip) a * b is [[ 1 6 18] [ 8 25 6] [ 1 2 3]] _ I know its a long time since my degree but that's not matrix multiplication is it ? You consider that a and b are matrices, but for the python interpreter they are arrays so a*b returns the multiplication of 2 arrays. For matrices multiplication, you could get a hint by typing the following in the interpreter : import numpy dir(numpy) help(numpy.matrixmultiply)#type q to exit which could make you want to try the following code : from numpy import * a = array([[1,2,3],[4,5,6],[1,2,3]]) b = array([[1,3,6],[2,5,1],[1,1,1]]) print matrixmultiply(a,b) ... output : ... array([[ 8, 16, 11], [20, 43, 35], [ 8, 16, 11]]) ... HIH, avell -- http://mail.python.org/mailman/listinfo/python-list
Re: String Formatting
OriginalBrownster wrote:
Hi there:
I was wondering if its at all possible to search through a string for a
specific character.
I want to search through a string backwords and find the last
period/comma, then take everything after that period/comma
Example
If i had a list:bread, butter, milk
I want to just take that last entry of milk. However the need for it
arises from something more complicated.
Any help would be appreciated
Would that work for you ?
a = 'bread, butter, milk'
a
'bread, butter, milk'
b = a.split(',')
b
['bread', ' butter', ' milk']
c = b[-1]
c
' milk'
d = c.strip()
d
'milk'
HIH
Avell
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Re: web searching scripts
[EMAIL PROTECTED] wrote: Does anyone know of a freely available script that can take a given URL and follow every link within it? Ideally, I would like to start with this to build a quick application to grab all the content off a website to publish it to a CD. Thanks, jul If you just want to download websites (i.e. not necessarily writing a program yourself to do that), you may try Httrack, it might suite your needs. http://www.httrack.com/ There even seem to be some sort of python bindings ... http://www.satzbau-gmbh.de/staff/abel/httrack-py/ But there might be some more pythonic solution around ... i would start looking at twisted or cherrypy, but i never used them myself ... HIH regards Avell -- http://mail.python.org/mailman/listinfo/python-list
Re: Reinstalling Python Problem (Newbie)
beno wrote: I intend to do that. However, I think this is the RIGHT list to ask questions pertinent to python... I didn't intend to be abrupt, ... I was just in an hurry, sorry for that. Anyway I still see this problem more as a program not compiling correctly on Freebsd than python not compiling correctly on a platform ... everybody has his own point of view :-) Anyway I don't have any freebsd box around any more, so there is no way for me to reproduce your problem (hence my remark about the place to post). Another thing, if you just want to use zope, it seems to be included in freebsd ports ... so you should not need to compile anything to _run_ zope on your system, but maybe you need specific options not included in the ports (this is only fully supported on freebsd-stable and freebsd-current which are AFAIK respectively 6.1 and 7.). Ref.: http://www.freebsd.org/ports/zope.html http://www.freebsd.org/ports/lang.html#python-2.4.3 Zope is not supported in 5.5 anymore but it is present in the ports archive. ftp://ftp.freebsd.org/pub/FreeBSD/releases/i386/5.5-RELEASE/ports/ To get back to your specific problem : 2 tests failed: test_mimetools test_urllib2 48 tests skipped: test_aepack test_al test_applesingle test_asynchat test_bsddb test_bsddb3 test_cd test_cl test_codecmaps_cn test_codecmaps_hk test_codecmaps_jp test_codecmaps_kr test_codecmaps_tw test_curses test_doctest test_fork1 test_gdbm test_gl test_imgfile test_imp test_linuxaudiodev test_logging test_macfs test_macostools test_nis test_normalization test_ossaudiodev test_pep277 test_plistlib test_queue test_scriptpackages test_socket test_socket_ssl test_socketserver test_sunaudiodev test_tcl test_thread test_threaded_import test_threadedtempfile test_threading test_threading_local test_threadsignals test_timeout test_unicode_file test_urllib2net test_urllibnet test_winreg test_winsound 13 skips unexpected on freebsd5: test_threadedtempfile test_imp test_threaded_import test_fork1 test_threading test_threadsignals test_socket test_thread test_queue test_asynchat test_doctest test_threading_local test_logging *** Error code 1 What do I do about the problems with mimetools and urllib2? This is the last report of the 'make test' command and there should be a few lines before that stating each test one by one and printing problems has they appear, and sometime pointing at a possible source for the specific problem. Have you got such a report for test_urllib2 ? What is meant by pointing to this folder thus (as the installation instructions instruct): ./configure --prefix=/usr/python The autotools (configure/make/make install) default installation directory is /usr/local by using the prefix option, you are indicating that you want to install all the python files in /usr/python when you will execute the command 'make install' (instead of /usr/local). I don't know which installation instructions you are following, but FWIK this is not a standard place for python to be installed (although it is recommended in the README for the AtheOS platform ...). BTW, the modpython site is down! It was up when I sent my first mail, and it is up as I send this one. http://www.modpython.org/ TIA, beno As I stated before I don't have any freebsd box to play with ... HTH Regards Avell -- http://mail.python.org/mailman/listinfo/python-list
Re: Reinstalling Python Problem (Newbie)
beno wrote: Avell Diroll wrote: beno wrote: *** tidying a little *** What do I do about the problems with mimetools and urllib2? This is the last report of the 'make test' command and there should be a few lines before that stating each test one by one and printing problems has they appear, and sometime pointing at a possible source for the specific problem. Have you got such a report for test_urllib2 ? Here it is for both: test_mimetools test test_mimetools failed -- Traceback (most recent call last): File /usr/local/zope/py243/Lib/test/test_mimetools.py, line 30, in test_boundary nb = mimetools.choose_boundary() File /usr/local/zope/py243/Lib/mimetools.py, line 130, in choose_boundary hostid = socket.gethostbyname(socket.gethostname()) gaierror: (8, 'hostname nor servname provided, or not known') test_urllib2 test test_urllib2 failed -- Traceback (most recent call last): File /usr/local/zope/py243/Lib/test/test_urllib2.py, line 352, in test_file for url in [ gaierror: (8, 'hostname nor servname provided, or not known') Looks like the same error ;) So, where am I supposed to provide this servname? *** tidying a little *** This gethostname() problem in the test suite looks like an old problem. I believe your problem is related to what Anthony Baxter and Guido van Rossum where discussing back in 2004 on the python-dev mailing list : http://mail.python.org/pipermail/python-dev/2003-November/040501.html To put things short the test suite might fail on any test using socket.gethostname() on a machine where /etc/hostname and /etc/hosts are not matching. If that is the case for your machine, the problem is coming from the test suite, not your python build. regards, Avell -- http://mail.python.org/mailman/listinfo/python-list
Re: Reinstalling Python Problem (Newbie)
beno wrote: It's been years since I've done this. I had a programmer working for me who disappeared one day, and now I'm taking over his responsibilities. I need to re-configure Apache for mod_python which means I have to rebuild python. I'm working with the latest distro. I'm heavily dependent on zope, so all this has to work together. Platform is FreeBSD 5.? I have the following questions: What is meant by pointing to this folder thus: ./configure --prefix=/usr/python When I run make test I get these errors: *** errors *** I've googled this with no luck. Please advise what to do or at least how to start TIA, beno I believe this is not the best place to ask your question, ... you should try : * the mod_python mailing list : http://www.modpython.org/ * some freebsd resources (e.g. http://www.freebsd.org/community.html ) * some zope resources ( http://www.zope.org/Resources/MailingLists ) A few google hints anyway : http://www.google.com/search?q=freebsd+mod_python+zopehl=en : http://www.bsdforums.org/forums/archive/index.php/t-1390.html http://www.modpython.org/pipermail/mod_python/2004-June/015722.html http://codespeak.net/pipermail/railroad-dev/2005-April/49.html http://www.modpython.org/FAQ/faqw.py?req=showfile=faq02.011.htp I don't have any freebsd system right now so I can't test anything, but there's two suggestions from those resources : * put the following lines in /usr/local/sbin/envvars : LD_PRELOAD=/usr/lib/libc_r.so export LD_PRELOAD OR * compile python without thread support There seems to be those kind of question on the mod_python mailing list (even on their FAQ), so I would _strongly_ suggest you to post your next questions about mod_python there. regards Avell -- http://mail.python.org/mailman/listinfo/python-list
Re: Checking File permissions
Anoop wrote: Please tell me how to check the existence of a file and the read permission to the file using python script You can check the os module (os.stat comes to mind). For an exemple you can have a look at : http://www.pixelbeat.org/talks/python/ls.py Regards, Avell -- http://mail.python.org/mailman/listinfo/python-list
Re: OS specific command in Python
[EMAIL PROTECTED] wrote: I have a question on getpass. Since I am a newbie you might find it a little dumb. By using the getpass, are u trying to retrieve the username and password of remote mahcine or local ? the module getpass contains 2 functions, getuser() and getpass() : getuser() returns the username of the user executing the python script on the machine where the script is executed. getpass() prompts the user for a password and returns it in a string whitout printing it on screen (just as the text mode login on linux or ssh). By the way this is better explained in the official python documentation. http://docs.python.org/lib/module-getpass.html -- http://mail.python.org/mailman/listinfo/python-list
Re: OS specific command in Python
3c273 wrote: I was just trying to learn how to use .communicate() and all of the examples I see have [0] after .communicate(). What is the significance of the [0]? From the Python Library Reference (http://docs.python.org/lib/node239.html), you learn that the method communicate() from the subprocess.Popen() class returns a tuple containing the standard output as first item and the standard error of the child process as second item. So the [0] in the example is for selecting the first item of the tuple ... from subprocess import * p1 = Popen([dmesg], stdout=PIPE) p2 = Popen([grep, hda], stdin=p1.stdout, stdout=PIPE) output = p2.communicate()[0] ### is equivalent to : from subprocess import * p1 = Popen([dmesg], stdout=PIPE) p2 = Popen([grep, hda], stdin=p1.stdout, stdout=PIPE) output_and_error = p2.communicate() output = output_and_error[0] ### or : from subprocess import * p1 = Popen([dmesg], stdout=PIPE) output=Popen([grep,hda],stdin=p1.stdout,stdout=PIPE).communicate()[0] ### or : from subprocess import * p1 = Popen([dmesg], stdout=PIPE) p2 = Popen([grep, hda], stdin=p1.stdout, stdout=PIPE) (output, stderror) = p2.communicate() I hope it was useful ... -- http://mail.python.org/mailman/listinfo/python-list
Re: OS specific command in Python
[EMAIL PROTECTED] wrote:
(snip)
I have a linux box, from where I remotely execute all the commands. The
remote machine is windows machine. I installed an OpenSSH server for
windows to send the shutdown command. I setup the public keys in such a
way that I could login to SSH server without using password.
(snip : script that fits your first need)
I was wondering how can I interact with an application . Since you
mentioned about subprocess module, I want a ability that my PYthon
script can actually interact with the windows box and launch and close
application there remotely.
(snip)
To clear up things a little, you _interact_ with the ssh process
launched on your local machine from your python script. this ssh process
_connect_ to an ssh server on your remote winbox. the ssh server then
execute the requested shell command. So you are limited by what a
windows shell script can do.
I must warn you that I never used windows much and never thought about
running a ssh server or even a serious shell session (can you even call
that a shell ?) on a windows box, so I won't be of much help for the
_interacting_ with windows process from the windows shell. The only
suggestion I could make would be to write a python script to be executed
on the remote machine that would be executed by the ssh server ...
local_machine_script.py
import os
os.system('ssh [EMAIL PROTECTED] python remote_machine_script.py')
###remote_machine_script.py
from subprocess import *
p = Popen(['A_WIN32_COMMAND'], stdout=PIPE)
(output, error) = p.communicate('INPUT_FOR_THE_WIN32_CMD')
This is really a _bad_ way to proceed but it gives you a little more
interaction.
A better way to interact with the remote shell is to keep the ssh
session interactive in the first place. To do that os.system is a 'no
go' and using the subprocess module all the way won't be easy (if even
possible). For an interactive ssh session you will need some non
standard library modules. I know 2 modules that would help : pexpect and
paramiko. Both may help but you will have to choose one or the other.
pexpect
pexpect gives you some control over a child process easing the way to
pass argument, to get and test the output in order to choose the next
input to send to the child process.
you can find it here :
http://pexpect.sourceforge.net/
The demo files contain some _great_ examples of how to use it with ssh
paramiko
paramiko implements the ssh2 protocol in python, that way you don't have
to use a child process to connect to the remote ssh server. After
establishing the connection you may open an ssh session or whatever you
need from your local script.
you can find it here :
http://www.lag.net/paramiko/
Again the demo files contain some _great_ examples
I would advise you to download both and to play with the demo files in
order to choose which one you prefer using.
If you are in a hurry, you should check pexpect first as one of the demo
files is implementing nearly everything you want.
Hope this helps
-Avell
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Re: Python at compile - possible to add to PYTHONPATH
rh0dium wrote:
(snip)
I want to add /foo/bar to the PYTHONPATH build so I don't have to add
it later on. Is there a way to do this?
(snip)
If i understand correctly, you want to add a directory to your
PYTHONPATH for a specific script without modifying the system PYTHONPATH
global variable ...
To import the Gazonk() class defined in /foo/bar/baz.py without adding
/foo/bar to PYTHONPATH you can try this:
###
import sys
sys.path.append('/foo/bar')
import baz
quux = baz.Gazonk()
###
hope it helped ...
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Re: OS specific command in Python
[EMAIL PROTECTED] wrote: I want to write a python program and call OS specific commands in it. So basically, instead of typing in on the command line argument I want to have it in a python program and let it do the action. There are several ways to do so : * os.system() if you just want to launch a command (kind of fire-and-forget) * the subprocess module if you want to access stdin, stdout and stderr of the launched command for example. in my program I would want to call the ssh feature like one does on the command line ssh [EMAIL PROTECTED] .etc To interact with an ssh process , there is a great module called pexpect (featuring some examples of how to handle ssh process in python) http://pexpect.sourceforge.net/ OT : paramiko is a module to handle the SSH2 protocol in python http://www.lag.net/paramiko/ -- http://mail.python.org/mailman/listinfo/python-list
Re: OS specific command in Python
[EMAIL PROTECTED] wrote:
I tried the following and it seemed to work
import os
os.system('system command here')
Any comments
This is an simple way to proceed if you don't need your python script to
know what happens to the launched process ...
When you need to :
* send some input to the command from the python script after it is launched
* get the output of the command in your python script
* get the pid associated to your command
* wait for your command to finish
* pipe some shell commands
* ...
you should use the subprocess module.
Here is a quick example from the Python Reference Library :
http://docs.python.org/lib/node242.html
##Shell Script :
output=`dmesg | grep hda`
##Python Script :
from subprocess import Popen
p1 = Popen([dmesg], stdout=PIPE)
p2 = Popen([grep, hda], stdin=p1.stdout, stdout=PIPE)
output = p2.communicate()[0]
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Re: OS specific command in Python
[EMAIL PROTECTED] wrote:
When you connect (via ssh or telnet) to a remote machine, you need to
type (manually)
your username and your password. Programming that is never easy.
This is really eased by the module getpass (std library) :
###
import getpass
login = getpass.getuser()
password = getpass.getpass()
###
If the username is different from your system login this can be changed to :
###
import getpass
login = raw_input('login: ')
password = getpass.getpass()
###
Python definitely comes with batteries included !
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Re: GUI and graph
questions? wrote: I have a graph with different parameters along different parts of the graph. I want to have a program that can display the graph with coloring for different part of the graph. Is this possible in Python? What should I read? Thanks for any comments I would suggest a combination of pyGTK and Matplotlib. A quick tutorial may be found here : http://www.serpia.org/pygtk Thinking about it, you might be satisfied with the gnuplot interface for python : http://gnuplot-py.sourceforge.net/ Hope that helped ... -- http://mail.python.org/mailman/listinfo/python-list
