Re: reading timestamp from vid file (avi)
Lucas Raab wrote: flupke wrote: Hi, i capture a movie from mividv to an avi containing the dv video. I found a program that reads the timestamp from the avi so you know the exact date and time the video was shot. However, the source of that program is not available and it doesn't allow to batch process a directory of video files which is a pain if you import the video using "split scenes". Is there a script/program in python that reads the header or where do i start to write something like that? Any info is appreciated. Regards, Benedict Take a look at pymedia at http://pymedia.org. Thanks, i'll see if i can do something with it. It looks promising but not as simple so i might ask this question on their list. Thanks Benedict -- http://mail.python.org/mailman/listinfo/python-list
thread end and make main program end also?
Dear all, Following are some codes: from myClass import * # some user define classes, which will catch the exception within its function thread_function(): myClass myclass while (1): returnValue = myclass.myfunction(); print "Return Value %s" % returnValue #... cont' to do something # main thrd = threading.Thread(None,thread_function,"thread_function") thrd.setDaemon(True) thrd.start() #... cont' to do other thing 'myClass.myfunction()' will return some value (used 'return') when caught exceptions and let the 'thread_function()' handle the following. But now found that after 'myClass.myfunction()' return, both thread program and main program will exit, when i prefer it will cont' to run. is it the default behavior of thread return? Thank a lot -- http://mail.python.org/mailman/listinfo/python-list
Re: capturing text from a GUI window
Earl Eiland wrote: > This sounds like just what I need. What is COM, and where do I get it? Also worth checking out: Simon Brunning's WinGuiAuto - control/query of windows and controls, including the function getEditText to read the text in an edit control. See http://www.brunningonline.net/simon/blog/archives/001129.html You'll probably also need something like Winspector to get class names etc - see http://www.windows-spy.com/ AutoIt3 - freeware, has a DLL version that is COM-controllable (after registration using "regsvr32 AutoItX3.dll" from a console window). I must admit that so far I've only ever used version 2 through COM. Includes functions such as ControlGetText and WinGetText, and throws in a separate spy/info program as well. See http://www.autoitscript.com/autoit3/ COM (component object model) - inter-component communication technology. See http://www.microsoft.com/com/default.mspx Makes it easy for programs with COM client functonality to use/control functions exposed in a COM server program (well, that's the Dispatch part of it that's applicable to your situation, it's apparently a fair bit more than that). Mark Hammond's Python for Windows extensions (thank you Mark Hammond!), also known as Win32All or PyWin32, adds COM client funcionality to Python. (Note: Python+PyWin32 also does COM server stuff, but you don't need to know about that.) Use the COM Makepy utility (under the Tools menu) in PythonWin (the IDE that comes with the Python for Windows extensions) to get a nice interface module for your chosen COM server component, then just call the functions in the interface module (or whatever the correct technical name is for the generated .py file). Worth reading: http://www.python.org/windows/win32com/QuickStartClientCom.html Example Python uses of COM server components: http://www.boddie.org.uk/python/COM.html http://www.pyzine.com/Issue007/Section_Articles/article_PythonCOM.html http://schram.net/articles/python/eudora.html http://www.daniweb.com/code/snippet208.html http://tinyurl.com/42rxa (Using a COM component is very similar in a variety of programming languages) In case you don't already have the Python for Windows extensions, or the ActiveState Python distribution which includes them: see http://sourceforge.net/projects/pywin32/ Regards, Myles. -- http://mail.python.org/mailman/listinfo/python-list
Re: BaseHTTPServer.BaseHTTPRequestHandler and HTTP chunking
Andy Leszczynski wrote: Does BaseHTTPServer.BaseHTTPRequestHandler support HTTP protocol chunking? No. Hardly any HTTP 1.1 features are supported. regards Steve -- http://mail.python.org/mailman/listinfo/python-list
Re: looking for case insesitive dictionary
Andy Leszczynski wrote:
so e.g.
x={}
x['a']=1
x['A']=2
print x['a'] #prints 2
Thx, A.
http://www.google.com/search?&q=python+case+insensitive+dictionary
Michael
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looking for case insesitive dictionary
so e.g.
x={}
x['a']=1
x['A']=2
print x['a'] #prints 2
Thx, A.
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BaseHTTPServer.BaseHTTPRequestHandler and HTTP chunking
Does BaseHTTPServer.BaseHTTPRequestHandler support HTTP protocol chunking? Thanks, Andy -- http://mail.python.org/mailman/listinfo/python-list
SimpleHTTPRequestHandler handling long lasting requests problem
I need a HTTP server handling long lasting requests e.g. 10-30 seconds.
Below is a pice of the code. In order to make the server reponsive while
handling othere requests I use SocketServer.ThreadingMixIn.
However the problem is the it does not work out. I checked thet a new
thread is created for each new connection new, but the main loop seems
to be frozen until the prevoius handling ends.
What could go wrong?
Thanks, Andy
* * *
import os
import time
import BaseHTTPServer
import SocketServer
import threading
import sys
class
SimpleHTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
def do_GET(self):
response=""+str(time.time())
self.send_response(200)
self.send_header("Content-type",'text/plain')
self.send_header("Content-Length",len(response))
self.end_headers()
time.sleep(10) #simulation of the processing
self.wfile.write(response)
def do_POST(self):
self.do_GET()
class
myWebServer(SocketServer.ThreadingMixIn,BaseHTTPServer.HTTPServer):
pass
if __name__ == '__main__':
server_address = ('',80)
httpd=myWebServer(server_address,SimpleHTTPRequestHandler)
sa=httpd.socket.getsockname()
print "Serving HTTP on", sa[0], "port", sa[1],"..."
httpd.serve_forever()
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Re: read() / readline() / readlines()
Fyi, I found the answer ( at least one that still works ) def PrintThread(myThread): while myThread.isAlive() == True: line = p.stdout.readline()[:-1] if line == "": continue if line == '\0': break print line Dave. - Original Message - From: Dave Lajoie To: Python-list@python.org Sent: Wednesday, March 09, 2005 12:24 AM Subject: read() / readline() / readlines() Hello! would someone know a method that allows to read line delimited by "\n" instead of trapping "\0" like readlines does? I have to write my own while loop to do this. while myThread.isAlive() == True: myChar = p.stdout.read(1) if myChar == '\0': print "Found EOF, exiting!" break myStr = myStr + myChar if myChar == '\n': print myStr myStr = "" continue is there a more elegant way to do this? tx Dave. -- http://mail.python.org/mailman/listinfo/python-list
hotshot load error
I've used profile before, but wanted to get more information so I
thought I'd try hotshot instead. It works fine when used like profile.
But when I run it using this line,
prof = hotshot.Profile('ScanHot.prof', lineevents=1)
though it runs all right, when I try to load the resulting file I get
this:
>>> hs = hotshot.stats.load("ScanHot.prof")
Traceback (most recent call last):
File "", line 1, in ?
File
"/System/Library/Frameworks/Python.framework/Versions/2.3/lib/
python2.3/hotshot/stats.py", line 12, in load
return StatsLoader(filename).load()
File
"/System/Library/Frameworks/Python.framework/Versions/2.3/lib/
python2.3/hotshot/stats.py", line 51, in load
assert not self._stack
AssertionError
--which I don't understand. (The program is a GUI one using wxPython
2.5, running from within the WingIDE on a Mac under OS 10.3.8, if any
of that makes a difference. Nothing there prevents hotshot from loading
a file that's been made without the lineevents=1 argument.)
Charles Hartman
Professor of English, Poet in Residence
http://cherry.conncoll.edu/cohar
http://villex.blogspot.com
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Re: os.walk(entire filesystem)
Tobiah wrote:
When I do os.walk('/') on a Linux computer, the entire file system is
walked. On windows, however, I can only walk one drive at a time (C:\,
D:\, etc.).
If this is a personal utility for one computer, and if you run XP on
that computer, then you have the ability to mount secondary drives
on to the file system of your main drive. This would give you the
effect that you are enjoying on the Linux side.
I am guessing that the utility that does this is the same one
that allows you to partition drives, but I'm not sure.
Ditto for win2k. right click 'My computer'->'Manage'->'Disk Management'
The only restriction is that both the root filesystem, and the one you
want to mount within it have to be NTFS. (I may be wrong, but that
appears to be true on my system.)
Still a moot point if this is to be widely deployed to existing PCs though.
--
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Usage example for ANSI.py from the pexpect package
Hello folks:
(This message is also posted on the help forum at the pexpect
sourceforge page, but all indentation in the code got stripped away
when I submitted the post.)
For some time I've wanted to make use of the ANSI.py module in the
pexpect package to handle screen-based telnet sessions in Python, but I
could never break the ice with the thing. After reading an article by
Greg Jorgenson where he recounts using the package to help him solve a
problem for a customer, I wrote him asking if he could give me any tips
to help me get started. Greg very graciously sent me some code to use
as an example, and I've finally been able to make some headway, thanks
to him. I'm at least sputtering along now, so I wanted to take the
time to pass along a little code in case anyone else out there would
like to tinker with this tool but has a little trouble getting off the
dime...
The code I'm posting below is a script that establishes a telnet
connection with my Linux machine, starts the vim text editor, reads
some text from the splash screen over a range of coordinates, and moves
the cursor around. On my machine, the raw data sent over the telnet
stream after issuing the "vim" command is this:
.[1;24r.[27m.[24m.[0m.(B.[H.[J.[2;1H.[1m~
(...and then a series of "~" symbols with line breaks-- takes up a lot
of screen space... :-))
~.[0m.(B.[24;63H0,0-1.[9CAll.[6;32HVIM - Vi IMproved.[8;34Hversion
6.3.54.[9;29Hby Bram Moolenaar et al..[10;24HModified by
.[1m<[EMAIL PROTECTED]>.[0m.(B.[11;19HVim is open source and freely
distributable.[13;26HHelp poor children in Uganda!.[14;18Htype :help
iccf.[1m.[0m.(B.[7Cfor information.[16;18Htype
:q.[1m.[0m.(B.[15Cto exit.[17;18Htype :help.[1m.[0m.(B
or .[1m.[0m.(B for on-line help.[18;18Htype :help
version6.[1m.[0m.(B for version info.[1;1H
The script is used to process the raw stream and read characters 25
through 37 on row 18, and it correctly reports "help version6" as the
result.
A great deal of the code that follows is either blatantly
cut-and-pasted from the sample Greg sent me, or has been modified only
slightly. I have included some code of my own which makes use of the
set_option_negotiation_callback method of the Telnet class, which can
be used to establish an agreement between the client and server on how
the session will proceed. Learning how to use that method was a hurdle
for me when I did it, maybe someone down the line will find an example
useful. Beware, though-like I said, it's my own code, and I'm a
rookie. There's probably a lot of room for improvement in what I came
up with.
One thing that I think is worth noting-none of the code below depends
on the pexpect module itself. It just uses the standard telnetlib to
establish the connection, and then uses the ANSI, screen, and FSM
modules from the pexpect package to interpret the output of a
screen-based application. The upshot of this is that the pty module is
not required, so you can use this with the native Windows version of
Python. Cygwin is not required.
Finally, I'd like to express my thanks to Mr. Jorgensen one more time.
Greg, you really helped out when I was ready to become frustrated. It's
people like you that make the 'net a nicer place to work and play!
OK, without further ado, here's the script-
#! /usr/bin/env python
""" ansi_py_usage: example for usage of the ANSI.py module """
from telnetlib import Telnet
from telnetlib import DO, DONT, WILL, WONT, theNULL, TTYPE, IAC, SB, \
SE, ECHO
import ANSI
global host_address,username,password
host_address='address_of_the_machine_you_want_to_connect_to'
username='your_username' # P.S.-- it's very bad practice to hard-code
password='your_password' # in a hostname, username, and password!
terminal_type='vt100'
class AnsiPyTestImplementation:
def __init__(self):
self.conn = None
self.crt = ANSI.ANSI(25,80)
def login(self, host, username, password):
try:
# empty the read buffer and check the connection
self.conn.read_eager()
except:
self.conn = None
tries = 45
while tries > 0:
print "logging in..."
try:
if self.conn is None:
#
# The following is an example of how to use the
# set_option_negotiation_callback method of the
# Telnet function. When any sub-negotiation
# requests are received from the server during the
# client/server hand-shaking, a user-defined
# function can be called to handle the situation.
#
self.conn = Telnet()
self.conn.set_option_negotiation_callback(self.neg)
self.conn.open(host)
self.waitfor("login: ", 5)
self.sendln(username)
self.waitfor("Password: ", 2)
self.sendln(password)
Re: How to allow events during long processing routine?
Thanks, M.E.Farmer. I continue to be impressed with how quickly and nicely one can get help here. Brent "M.E.Farmer" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Survey says. > ...wxYield() > > ;) > M.E.Farmer > -- http://mail.python.org/mailman/listinfo/python-list
Re: python cvs interface?
Ah, unfortunately it looks like this program uses something called gcvs, a gtk cvs interface written in C++, for interfacing to low level cvs routines. So it probably won't work for me. Oh well. Anyone else have any suggestions? -- http://mail.python.org/mailman/listinfo/python-list
email.Message.set_charset and Content-Transfer-Encoding
I've noticed that using set_charset() on an email.Message instance will not replace any existing Content-Transfer-Encoding header but will install one if it isn't yet present. Thus, if you initially create a message without a charset, it defaults to us-ascii, and creates both Content-Type and Content-Transfer-Encoding headers (the latter of which defaults to "7bit"). If you then later attempt to change the charset (say, to "iso-8859-1") with set_charset(), it adjusts the Content-Type header, but leaves the Content-Transfer-Encoding header alone, which I would think is no longer accurate, since it is the new charset's body encoding that will eventually be used when flattening the message, which would then no longer match the encoding header. It's also different than if you had passed in an iso-8859-1 charset originally when constructing the message instance, in which case the encoding would have been selected as quoted-printable. The documentation for set_charset seemed to imply (at least to me) that eventual headers generated by a generator would be affected by the change in charset, so having it stay at 7bit was confusing. Is anyone aware of a reason why the encoding shouldn't adjust in response to a set_charset call similar to how a supplied charset initially establishes it at message creation time? -- David -- http://mail.python.org/mailman/listinfo/python-list
Re: capturing text from a GUI window
On Tue, 2005-03-08 at 14:27, [EMAIL PROTECTED] wrote: > Earl Eiland wrote: > > Anyone know how to capture text from GUI output? I need to process > > information returned via a GUI window. > > > > Earl > > Assuming Windows, then these guys have an interesting tool: > http://www.skesoft.com/textcatch.htm > It's not free, but you can try it before you buy it. > You will need COM to control it from Python. This sounds like just what I need. What is COM, and where do I get it? (I'm really a Linux guy. I don't ken the mysteries of Window very well.) earl -- http://mail.python.org/mailman/listinfo/python-list
Re: os.walk(entire filesystem)
I don't think what you want would even work. You can't walk A:
unless a floppy is present, O/S will bark at you. You can't
walk D: (cdrom drive) unless a CDROM is present. What about
network drives??? Unlike Linux where these directories appear
to be empty if nothing is mounted Windows tries to read a
directory and errors. Just follow what Peter Hansen has
suggested and write a wrapper function that calls os.walk
repeatedly for all the actual drives in your system
that are readable at all times. It isn't all that hard.
Larry Bates
rbt wrote:
> More of an OS question than a Python question, but it is Python related
> so here goes:
>
> When I do os.walk('/') on a Linux computer, the entire file system is
> walked. On windows, however, I can only walk one drive at a time (C:\,
> D:\, etc.). Is there a way to make os.walk() behave on Windows as it
> behaves on Linux? I'd like to walk the entire file system at once... not
> one drive at a time.
>
> Thanks!
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Re: os.walk(entire filesystem)
When I do os.walk('/') on a Linux computer, the entire file system is
walked. On windows, however, I can only walk one drive at a time (C:\,
D:\, etc.).
If this is a personal utility for one computer, and if you run XP on
that computer, then you have the ability to mount secondary drives
on to the file system of your main drive. This would give you the
effect that you are enjoying on the Linux side.
I am guessing that the utility that does this is the same one
that allows you to partition drives, but I'm not sure.
--
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Re: PythonWin line spacing
Thomas Philips: > I've just downloaded and installed ActivePython and am trying to > customize the PythonWin editor. Its line spacing seems to default to 2, > and consequently, I cannot see many lines of code on a screen. How do I > set the line spacing to 1? I presume you are talking about the Interactive Window which is spread out a bit. The line height is determined by the tallest font possible in the window. You could go looking through the code to find all the styles set up for that window. Selecting View | Fixed Font *twice* does tighten up the text. Neil -- http://mail.python.org/mailman/listinfo/python-list
Re: An Odd Little Script
Michael Hoffman wrote: Greg Lindstrom wrote: I have a file with varying length records. All but the first record, that is; it's always 107 bytes long. What I would like to do is strip out all linefeeds from the file, read the character in position 107 (the end of segment delimiter) and then replace all of the end of segment characters with linefeeds, making a file where each segment is on its own line. H... here's one way of doing it: import mmap import sys DELIMITER_OFFSET = 107 N.B. this is a zero-based 107. If you are using one-based coordinates, then this is actually position 108. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: os.walk(entire filesystem)
rbt wrote:
More of an OS question than a Python question, but it is Python related
so here goes:
When I do os.walk('/') on a Linux computer, the entire file system is
walked. On windows, however, I can only walk one drive at a time (C:\,
D:\, etc.). Is there a way to make os.walk() behave on Windows as it
behaves on Linux? I'd like to walk the entire file system at once... not
one drive at a time.
Basically, no, I don't think so. The two operating systems
have different concepts of what a file system is, and Linux
sees the world from one root, while Windows has many.
But that aside, is there anything stopping you from just
writing your own wrapper routine that does the right
thing** on Windows?
-Peter
** "Right thing" might be tricky: walking all drive letters
would *really* annoy me in most programs, since some of them
are network shares, some of them are removable storage like
CompactFlash modules, and some might just be "subst" drives
that map to a subfolder on another drive. Make sure you
at least check with the appropriate Windows API which
drives are really local storage and stick to them.
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Re: Unicode BOM marks
Steve Horsley wrote: It is my understanding that the BOM (U+feff) is actually the Unicode character "Non-breaking zero-width space". My understanding is that this used to be the case. According to http://www.unicode.org/faq/utf_bom.html#38 the application should now specify specific processing, and both simply dropping it, or reporting an error are both acceptable behaviour. Applications that need the ZWNBSP behaviour (i.e. want to indicate that there should be no break at this point) should use U+2060 (WORD JOINER). Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: distutils: binary distribution?
Stefan Waizmann wrote: I would like the distutils are creating a binary distribution only - means create the distribution file with *.pyc files WITHOUT the *.py files. Any ideas? You will need to create your own command. You can either specialize the build command, to not copy the source code (more specifically, the build_py command), or you modify the relevant bdist_* command to not include the "built" .py files into the binary distribution. Once you have implemented the derived commands, you pass them to the setup function in the cmdclass keyword argument. Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: How to allow events during long processing routine?
Survey says. ...wxYield() ;) M.E.Farmer -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a short-circuiting dictionary "get" method?
untested def my_getter(m, i, f): try: return m[i] except (KeyError, IndexError): return f() my_getter(d, 'x', bigscaryfunction) my_getter(d, 'y', lambda: scaryinlineexpresion) pgp04VRKFqQL1.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: An Odd Little Script
Greg Lindstrom wrote: I have a task which -- dare I say -- would be easy in Perl but would rather do in Python (our primary language at Novasys). I have a file with varying length records. All but the first record, that is; it's always 107 bytes long. I intuit that you are dealing with EDI documents. If so, there have been some recent discussions (and code) here. This Google Groups search will probably help: http://groups-beta.google.com/groups?q=group:comp.lang.python+edi&start=0&scoring=d&; (http://tinyurl.com/6urby). -- Benji York Sr. Software Engineer Zope Corporation -- http://mail.python.org/mailman/listinfo/python-list
Re: An Odd Little Script
Greg Lindstrom wrote:
> Hello-
>
> I have a task which -- dare I say -- would be easy in
> Perl but would rather do in Python (our primary
> language at Novasys). I have a file with varying length records.
All
> but the first record, that is; it's always 107 bytes long. What I
would
> like to do is strip out all linefeeds from the file, read the
character
> in position 107 (the end of segment delimiter) and then replace all
of
> the end of segment characters with linefeeds, making a file where
each
> segment is on its own line. Currently, some vendors supply files
with
> linefeeds, others don't, and some split the file every 80 bytes. In
> Perl I would operate on the file in place and be on my way. The
files
> can be quite large, so I'd rather not be making extra copies unless
it's
> absolutely essential/required.
>
> I turn to the collective wisdom/trickery of the list to point me in
the
> right direction. How can I perform the above task while keeping my
sanity?
>
> Thanks!
> --greg
> --
> Greg Lindstrom 501 975.4859
> Computer Programmer [EMAIL PROTECTED]
> NovaSys Health
> Little Rock, Arkansas
>
> "We are the music makers, and we are the dreamers of dreams." W.W.
This should be fairly simple, but maybe not ;)
# get the end of segment character
# this is not optimal but should be a start
f = open('yourrecord', 'r')
eos = f.seek(107).read(1)
r = f.read()
f.close()
r = r.replace('\r', '')
r = r.replace('\n', '')
r = r.replace(eos, '\n')
f = open('yourrecord', 'w')
f.write(r)
f.close()
hth,
M.E.Farmer
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Re: An Odd Little Script
This might be hack-ish, more elegant solutions are likely to exist, but this is the general idea: LINEFEED = "\n" # or whatever EOR = "?"# or whatever def fixEOR(filename): f = open(filename,"r+") byte = True # loops through whole file while True: # loops through record while byte and (byte != EOR): byte=f.read(1) if not byte: break f.seek(-1,1)# backup 1 byte = LINEFEED f.write(byte) # incidentally, will put LINEFEED at EOF f.flush() f.close() On Wednesday 09 March 2005 02:06 pm, Greg Lindstrom wrote: > Hello- > > I have a task which -- dare I say -- would be easy in > Perl but would rather do in Python (our primary > language at Novasys). I have a file with varying length records. All > but the first record, that is; it's always 107 bytes long. What I would > like to do is strip out all linefeeds from the file, read the character > in position 107 (the end of segment delimiter) and then replace all of > the end of segment characters with linefeeds, making a file where each > segment is on its own line. Currently, some vendors supply files with > linefeeds, others don't, and some split the file every 80 bytes. In > Perl I would operate on the file in place and be on my way. The files > can be quite large, so I'd rather not be making extra copies unless it's > absolutely essential/required. > > I turn to the collective wisdom/trickery of the list to point me in the > right direction. How can I perform the above task while keeping my sanity? > > Thanks! > --greg > -- > Greg Lindstrom 501 975.4859 > Computer Programmer [EMAIL PROTECTED] > NovaSys Health > Little Rock, Arkansas > > "We are the music makers, and we are the dreamers of dreams." W.W. -- James Stroud, Ph.D. UCLA-DOE Institute for Genomics and Proteomics Box 951570 Los Angeles, CA 90095 -- http://mail.python.org/mailman/listinfo/python-list
Re: Recognizing the Arrival of a New File
Greg Lindstrom <[EMAIL PROTECTED]> writes: > Hello- > I am writing an application where I need to recognize when a file > arrives in a given directory. Files may arrive at any time during the > course of the day. Do I set up a cron job to poll the directory every > few minutes? Write a daemon to monitor the directory? Or is there some > other more common/accepted way to perform this task? I'm using Python > 2.3 on Linux. At my last job, we had a similar problem and I wanted to be able to check that the file was closed by the application that was putting it there (in that case the application was w32 writing to a share via samba). http://cmg.dok.org/cgi-bin/pyblosxom.cgi/python/linuxlease/ Every other way I could find that relied on simple FS semantics had the possibility of reading a file partially. -- Chris Green <[EMAIL PROTECTED]> Eschew obfuscation. -- http://mail.python.org/mailman/listinfo/python-list
Share a accomodation at PyCon from march 22-27?
Hi Guys, is someone interested in sharing accomodation during the upcoming PyCon? I'll be there from the 22 to 27th of march (five nights). Gregoire -- http://mail.python.org/mailman/listinfo/python-list
Re: Web framework
"Gianluca Sartori" <[EMAIL PROTECTED]> writes: > What web framework do you suggest to develop with? I tend to use mod_python. Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: An Odd Little Script
On Wednesday 09 March 2005 04:06 pm, Greg Lindstrom wrote:
> Hello-
>
> I have a task which -- dare I say -- would be easy in
> Perl but would rather do in Python (our primary
> language at Novasys). I have a file with varying length records. All
> but the first record, that is; it's always 107 bytes long. What I would
> like to do is strip out all linefeeds from the file, read the character
> in position 107 (the end of segment delimiter) and then replace all of
> the end of segment characters with linefeeds, making a file where each
> segment is on its own line. Currently, some vendors supply files with
> linefeeds, others don't, and some split the file every 80 bytes. In
> Perl I would operate on the file in place and be on my way. The files
> can be quite large, so I'd rather not be making extra copies unless it's
> absolutely essential/required.
The only problem I see is the "in place" requirement, which seems silly
unless by "quite large" you mean multiple gigabytes. Surely Perl
actually makes a copy in the process even though you never see
it? That much shouldn't be hard, but *actually* doing it in-place
runs into problems with the file data being accidently overwritten,
doesn't it?
I'd make a copy and delete the original afterwards.
delimiter = open('original', 'r').read(108)[107]
# this is actually the 108th character, right?
# if you mean the actual 107th character, that'll be element [106] of course
BLOCKSIZE = 1
inf = open('original', 'r')
ouf = open('result', 'w')
for block in inf.read(BLOCKSIZE):
block = block.replace('\n', '')
block = block.replace(delimiter, '\n')
ouf.write(block)
Now, if we can GUARANTEE that the block never gets longer, it seems
likely that you could actually open the file 'rw' and use the same file handle
for output and input, with explicit seek() and tell() methods being used:
# REALLY, COMPLETELY UNTESTED AND DANGEROUS
delimiter = open('original', 'r').read(108)[107] # this is actually the 108th
character, right?
BLOCKSIZE = 1
f = open('didnt_really_want_that_file_anyway.dat', 'rw')
def indata(fp, sz):
data = fp.read(sz)
pos = fp.tell()
return data, pos
def outdata(fp, pos, data):
fp.seek(pos)
fp.write(data)
pos = fp.tell()
return pos
outpos = 0
for block, inpos in indata(f,BLOCKSIZE):
block = block.replace('\n', '')
block = block.replace(delimiter, '\n')
outpos = outdata(f, outpos, block)
# TOTALLY UNTESTED!
I can imagine evil operating system behavior that could make this trash the
file,
BTW, such as reading or writing data in blocks. I'd want to test to make sure
such things don't happen (or that Python magically compensates somehow).
But is it really worth that?
Cheers,
Terry
--
--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks http://www.anansispaceworks.com
--
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Re: An Odd Little Script
Greg Lindstrom wrote: I have a file with varying length records. All but the first record, that is; it's always 107 bytes long. What I would like to do is strip out all linefeeds from the file, read the character in position 107 (the end of segment delimiter) and then replace all of the end of segment characters with linefeeds, making a file where each segment is on its own line. H... here's one way of doing it: import mmap import sys DELIMITER_OFFSET = 107 data_file = file(sys.argv[1], "r+w") data_file.seek(0, 2) data_length = data_file.tell() data = mmap.mmap(data_file.fileno(), data_length, access=mmap.ACCESS_WRITE) delimiter = data[DELIMITER_OFFSET] for index, char in enumerate(data): if char == delimiter: data[index] = "\n" data.flush() There are doubtless more efficient ways, like using mmap.mmap.find() instead of iterating over every character but that's an exercise for the reader. And personally I would make extra copies ANYWAY--not doing so is asking for trouble. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: python cvs interface?
Thanks, that looks promising, I'll take a look! -- http://mail.python.org/mailman/listinfo/python-list
Re: Web framework
"Gianluca Sartori" <[EMAIL PROTECTED]> said : > Hi guys, > What web framework do you suggest to develop with? I had a look both at > Nevow and Quixote. These seemes to be the most appreciated by the > community. Anyway, I had no luck looking for a complete and coherent > documentation. Snakelets is nice, clean, simple to get started, and well documented. Karrigell is about in the same league. CherryPy is a step above (all IMO of course). -- YAFAP : http://www.multimania.com/fredp/ -- http://mail.python.org/mailman/listinfo/python-list
[wxPython] How to allow events during long processing routine?
I'm running some code that takes a long time to finish. I would like the user to be able to do other things while it is running. It seems to me there is a function I can call to tell wxPython to process any pending messages or events. I would call this perhaps every 1000 times through my loop. Anybody remember the name of that function? Brent -- http://mail.python.org/mailman/listinfo/python-list
An Odd Little Script
Hello- I have a task which -- dare I say -- would be easy in Perl but would rather do in Python (our primary language at Novasys). I have a file with varying length records. All but the first record, that is; it's always 107 bytes long. What I would like to do is strip out all linefeeds from the file, read the character in position 107 (the end of segment delimiter) and then replace all of the end of segment characters with linefeeds, making a file where each segment is on its own line. Currently, some vendors supply files with linefeeds, others don't, and some split the file every 80 bytes. In Perl I would operate on the file in place and be on my way. The files can be quite large, so I'd rather not be making extra copies unless it's absolutely essential/required. I turn to the collective wisdom/trickery of the list to point me in the right direction. How can I perform the above task while keeping my sanity? Thanks! --greg -- Greg Lindstrom 501 975.4859 Computer Programmer [EMAIL PROTECTED] NovaSys Health Little Rock, Arkansas "We are the music makers, and we are the dreamers of dreams." W.W. -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] a program to delete duplicate files
On Wednesday 09 March 2005 06:56 am, Xah Lee wrote:
> here's a large exercise that uses what we built before.
>
> suppose you have tens of thousands of files in various directories.
> Some of these files are identical, but you don't know which ones are
> identical with which. Write a program that prints out which file are
> redundant copies.
For anyone interested in responding to the above, a starting
place might be this maintenance script I wrote for my own use. I don't
think it exactly matches the spec, but it addresses the problem. I wrote
this to clean up a large tree of image files once. The exact behavior
described requires the '--exec="ls %s"' option as mentioned in the help.
#!/usr/bin/env python
# (C) 2003 Anansi Spaceworks
#---
# find_duplicates
"""
Utility to find duplicate files in a directory tree by
comparing their checksums.
"""
#---
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#---
import os, sys, md5, getopt
def file_walker(tbl, srcpath, files):
"""
Visit a path and collect data (including checksum) for files in it.
"""
for file in files:
filepath = os.path.join(srcpath, file)
if os.path.isfile(filepath):
chksum = md5.new(open(os.path.join(srcpath, file)).read()).digest()
if not tbl.has_key(chksum): tbl[chksum]=[]
tbl[chksum].append(filepath)
def find_duplicates(treeroot, tbl=None):
"""
Find duplicate files in directory.
"""
dup = {}
if tbl is None: tbl = {}
os.path.walk(treeroot, file_walker, tbl)
for k,v in tbl.items():
if len(v) > 1:
dup[k] = v
return dup
usage = """
USAGE: find_duplicates [
Python-formatted command string to act on the indexed
duplicate in each duplicate group found. E.g. try
--exec="ls %s"
-n, --index=
Which in a series of duplicates to use. Begins with '1'.
Default is '1' (i.e. the first file listed).
Example:
You've copied many files from path ./A into path ./B. You want
to delete all the ones you've processed already, but not
delete anything else:
% find_duplicates -q --exec="rm %s" --index=1 ./A ./B
"""
def main():
action = None
quiet = 0
index = 1
dup= {}
opts, args = getopt.getopt(sys.argv[1:], 'qhHn:x:',
['quiet', 'help', 'exec=', 'index='])
for opt, val in opts:
if opt in ('-h', '-H', '--help'):
print usage
sys.exit()
elif opt in ('-x', '--exec'):
action = str(val)
elif opt in ('-n', '--index'):
index = int(val)
elif opt in ('-q', '--quiet'):
quiet = 1
if len(args)==0:
dup = find_duplicates('.')
else:
tbl = {}
for arg in args:
dup = find_duplicates(arg, tbl=tbl)
for k, v in dup.items():
if not quiet:
print "Duplicates:"
for f in v: print "\t%s" % f
if action:
os.system(action % v[index-1])
if __name__=='__main__':
main()
--
--
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Anansi Spaceworks http://www.anansispaceworks.com
--
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Re: enum question
On Friday 04 March 2005 02:54 pm, M.N.A.Smadi wrote: > does python support a C-like enum statement where one can define a > variable with prespesified range of values? No, but in most situations where I would've used an enum, I use a trivial class like this: class states: ON, OFF, UNKNOWN, UNDEFINED, INCOMPREHENSIBLE, SILLY = range(6) The values are actually integers of course. Then I can pass named values to a function: from silly import walk, states walk(kind=states.SILLY) If you want to make them more like a bitfield, you could always do this instead: class properties: AUDIBLE, VISIBLE, SPEAKABLE = [2**i for i in range(3)] then you can have, e.g.: evil(allowed=False, AUDIBLE|VISIBLE|SPEAKABLE) if mode & AUDIBLE: hear() if mode & VISIBLE: see() etc. Obviously if you want more rigid assurance of the behavior of the variable in question you'd need more work. But most of the time, enums are just to make the code more readable, so I do this, which is extremely compact, and yet pretty clear. You *can* drop the enum values into the module namespace, but then importing them is a pain, so I like to qualify them with the class as shown. Cheers, Terry -- -- Terry Hancock ( hancock at anansispaceworks.com ) Anansi Spaceworks http://www.anansispaceworks.com -- http://mail.python.org/mailman/listinfo/python-list
[German] Deutsche Python Newsgroup ist eingerichtet
(This posting will be interesting for german speaking folks only.) Hallo, die deutsche Pyhton-Newsgroup de.comp.lang.python wurde endlich eingerichtet. Vielen Dank an alle, die fuer die Einrichtung gestimmt haben! Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: python cvs interface?
Corey, WinCvs can use python for macros, you might want to look at their code: http://cvs.sourceforge.net/viewcvs.py/cvsgui/cvsgui/PythonLib/cvsgui/ You may also want to look at viewcvs, which is written in Python. -jjr -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a short-circuiting dictionary "get" method?
Dave Opstad wrote:
In this snippet:
d = {'x': 1}
value = d.get('x', bigscaryfunction())
the bigscaryfunction is always called, even though 'x' is a valid key.
Is there a "short-circuit" version of get that doesn't evaluate the
second argument if the first is a valid key? For now I'll code around
it, but this behavior surprised me a bit...
Dave
If (and this is a big if) you know that the dictionary contains no values that
evaluate to boolean false, then you can use the short-circuiting 'or' operator:
>>> def bigscaryfunction():
... print "scary"
...
>>> d= globals()
>>> d.get("key") or bigscaryfunction()
scary
>>> d.get("__name__") or bigscaryfunction()
'LazyDictget'
>>>
Alternatively, you can just write your own getter function:
>>> def lazyget(dict_, key, default):
... if key in dict_:
... return dict_[key]
... else:
... return default()
...
>>> lazyget(d,"key",bigscaryfunction)
scary
>>> lazyget(d,"__name__",bigscaryfunction)
'LazyDictget'
>>>
The optimal choice of whether to "look before you leap" i.e., "if key in dict_"
or simply catch KeyError, depends on the ratio of hits to misses. Google will
turn up some experimental data on this, but, I seem to recall that if more than
10% attempts are misses, then LBYL is faster, because raising the exception is slow
Michael
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Re: Web framework
You may also want to look at Spyce. It is similar to JSP,PHP, or ASP. There are some good docs and examples at the site. http://spyce.sourceforge.net/ -jjr -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode BOM marks
Francis Girard wrote: Le lundi 7 Mars 2005 21:54, "Martin v. LÃwis" a Ãcrit : Hi, Thank you for your very informative answer. Some interspersed remarks follow. I personally would write my applications so that they put the signature into files that cannot be concatenated meaningfully (since the signature simplifies encoding auto-detection) and leave out the signature from files which can be concatenated (as concatenating the files will put the signature in the middle of a file). Well, no text files can't be concatenated ! Sooner or later, someone will use "cat" on the text files your application did generate. That will be a lot of fun for the new unicode aware "super-cat". It is my understanding that the BOM (U+feff) is actually the Unicode character "Non-breaking zero-width space". I take this to mean that the character can appear invisibly anywhere in text, and its appearance as the first character of a text is pretty harmless. Concateniating files will leave invisible space characters in the middle of the text, but presumably not in the middle of words, so no harm is done there either. I suspect that the fact that an explicitly invisible character feff has an invalid character code fffe for its byte-reversed counterpart is no accident, and that the charecter was intended from inception to also server as a byte order indication. Steve -- http://mail.python.org/mailman/listinfo/python-list
Re: popen2.Popen3 doesn't work well for me
alexrait1 wrote: It does but that's not what I want. I need a class which I can query for process termination for instance... Is there a way to overcome this problem with Popen3? If you're using Python 2.4 you should look into the subprocess module. I think these docs might be what you're looking for: http://docs.python.org/lib/node235.html STeVe -- http://mail.python.org/mailman/listinfo/python-list
Re: Running doctests with unittest
Thomas Heller wrote: I'm trying to integrate some doctest tests with unittest. The tests must be exposed as one or more subclasses of unittest.TestCase, so I'm collecting them with a call to doctest.DocTestSuite(), and then add them to a TestCase class I have created. The tests seem to run, but they always seem to succeed - I have no idea why. Any ideas? Thomas ---snip--- """ print "Hi" print 1213 """ def func(): """ >>> print "spam" >>> print blah """ import doctest, unittest suite = doctest.DocTestSuite() class TestCase(unittest.TestCase): pass for index, test in enumerate(suite._tests): setattr(TestCase, "test_%d" % index, test) if __name__ == "__main__": if 1: import unittest unittest.main() else: import doctest doctest.testmod() ---snip--- I can't explain why all the tests seemed to pass, but I tried a different approach that works. Once you have a suite object, you just need to run it. The TextTestRunner works well for that. I got output errors and failures by doing the following: if __name__ == '__main__': import doctest, unittest suite = doctest.DocTestSuite() testRunner = unittest.TextTestRunner() testRunner.run(suite) HTH, Jim Sizelove -- http://mail.python.org/mailman/listinfo/python-list
Re: popen2.Popen3 doesn't work well for me
It does but that's not what I want. I need a class which I can query for process termination for instance... Is there a way to overcome this problem with Popen3? -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 removes None data type?
Jacek Generowicz napisał(a): Implication: A long standing wart in Python now gone. Its time to gloat. Are there any really evil glitches LEFT in Python? Python 2.4 (#1, Dec 1 2004, 14:23:15) [GCC 3.2.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. True, False = False, True True False Ugh, today I've found this in some legacy code (yes, there *is* legacy code in Python). And I will not touch this module until such syntax become illegal. -- Jarek Zgoda http://jpa.berlios.de/ | http://www.zgodowie.org/ -- http://mail.python.org/mailman/listinfo/python-list
os.walk(entire filesystem)
More of an OS question than a Python question, but it is Python related
so here goes:
When I do os.walk('/') on a Linux computer, the entire file system is
walked. On windows, however, I can only walk one drive at a time (C:\,
D:\, etc.). Is there a way to make os.walk() behave on Windows as it
behaves on Linux? I'd like to walk the entire file system at once... not
one drive at a time.
Thanks!
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Re: Best way to make a list unique?
Marc Christiansen wrote:
Michael Spencer <[EMAIL PROTECTED]> wrote:
Nice. When you replace None by an object(), you have no restriction on
the elements any more:
Thanks for the suggestion, Marc.
Note that if there is no need to access the middle of the collection, then the
implementation is simpler, and less resource-intensive, since the items can be
singly-linked
class UniqueQueue(object):
def __init__(self, iterable):
self._data = _data = {}
self._last = self._root = object() # An object the user is unlikely to
# reference - thanks Marc
self.update(iterable)
def push(self, obj):
if not obj in self._data:
self._data[self._last] = obj
self._last = obj
def pop(self):
data = self._data
first = data.pop(self._root)
self._root = first
return first
def update(self, iterable):
last = self._last
data = self._data
for item in iterable:
if item not in data:
data[last] = item
last = item
self._last = last
def __iter__(self):
data = self._data
next = self._root
try:
while 1:
next = data[next]
yield next
except KeyError:
raise StopIteration
def __repr__(self):
return "%s(%s)" % (self.__class__.__name__,list(self))
>>> q = UniqueQueue(range(5))
>>> q.update(range(3,8))
>>> q
UniqueQueue([0, 1, 2, 3, 4, 5, 6, 7])
>>> q.pop()
0
>>> q
UniqueQueue([1, 2, 3, 4, 5, 6, 7])
>>>
>>> q.push(None)
>>> q
UniqueQueue([1, 2, 3, 4, 5, 6, 7, None])
>>>
Michael
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Re: Second argument to super().
Tobiah wrote:
What is the purpose of the second argument to super()?
You probably want to check the docs[1] again. They give an example:
class C(B):
def meth(self, arg):
super(C, self).meth(arg)
What is meant by the returning of an 'unbound' object
when the argument is omitted.
If you supply a second argument (an instance of the type) to super, the
returned object will be bound to that instance. For example:
py> class C(object):
... def g(self):
... print 'g'
...
py> class D(C):
... def h(self):
... print 'h'
...
py> d = D()
py> s = super(D, d)
py> d2 = D()
py> s2 = super(D, d2)
py> s == s2
False
Note that the object returned depends on the instance passed in. An
'unbound' object would not be bound in this way to the instance.
Note also that the super object returned has access only to the methods
of the superclass:
py> s.g
>
py> d.g
>
py> s.h
Traceback (most recent call last):
File "", line 1, in ?
AttributeError: 'super' object has no attribute 'h'
py> d.h
>
Also, when would I pass an object as the second argument,
and when would I pass a type?
For most use cases, you'll probably only want an object (an instance).
You might run into the type case if you define the staticmethod __new__
in a class:
py> class S(str):
... def __new__(cls, s):
... return super(S, cls).__new__(cls, 'S(%s)' %s)
...
py> S('abc')
'S(abc)'
In this case __new__ takes as a first argument the class (type) of the
object, so if you want to invoke the superclass __new__, you need to
pass the type to super. (You don't have an instance to pass.)
STeVe
[1] http://docs.python.org/lib/built-in-funcs.html#l2h-70
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python cvs interface?
Hi everyone, this should be a quick question. I'm writing some scripts to take some file and move them into a CVS repository, but it's pretty slow, because it uses system calls to execute the CVS commands. Has anyone ever made a python to CVS interface library that I could use? I've been trying to google around for something, but predictably I get a zillion sourceforge repository hits, and it isn't really helping. So anyway, if anyone knows of a useful module, I'd love to hear about it. Thanks! - Corey -- http://mail.python.org/mailman/listinfo/python-list
Re: Error on xpath-ing a DOM with namespaces
> NSS = {u'wsdl': u'http://schemas.xmlsoap.org/wsdl/'}
> #""processorNss" = "namespace bindings to be used by the processor"
> ctx = Context(wsdl_doc, processorNss=NSS)
> Evaluate(u'wsdl:description/wsdl:documentation', context=ctx)
> """
>
> Should give you a start.
Thanks a lot. I found a solution for my problem and lots of food for
thought for improving my XML handling in general.
Best regards
Piet
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Re: Is there a short-circuiting dictionary "get" method?
Bill Mill wrote:
On 9 Mar 2005 10:05:21 -0800, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
Maybe this can help:
value = d.get('x', lambda: bigscaryfunction())
def test(): print 'gbye'
...
d = {}
z = d.get('x', lambda: test())
z
at 0x008D6870>
So this seems to be merely an obfuscation of:
z = d.get('x', test)
z
I just wanted to ask, am I missing something?
Nope that looks right. See "Overuse of lambda" in
http://www.python.org/moin/DubiousPython for discussion of exactly this
mistake.
STeVe
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Re: Problematic behavior of the import statement when several module files have the same name.
Xif wrote:
Hello Everyone!
Here's a problem with relative imports:
Suppose I have a package called some_package (in a separate directory
included in the PYTHONPATH, with an __init__.py file etc.)
This package has a module inside the directory, called "database", and
therefore residing in the file some_package/database.py.
Now, what if there's another module, for example inside the
site-packages directory, with the same file name (i.e. database.py)?
We have a problem. Since although these modules have different absolute
names ("some_package.database" for the first module, and just
"database" for the second), when I try to do
import database
from inside some_package, it first of all tries to find the matching
file in the some_package directory (i.e. do a relative import). Since
it first checks the some_package directory, and finds database.py
there,
import database
in fact imports the module with the absolute name
some_package.database.
You've just re-discovered the reason you should always use absolute
imports. Check out:
http://www.python.org/doc/faq/programming.html#what-are-the-best-practices-for-using-import-in-a-module
STeVe
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Re: running programs from within python
M.N.A.Smadi wrote:
> am getting an error in the script as follows:
>
> NameError: global name 'os' is not defined
>
> however i dont get the same error when running from the python CLI.
> (and yes i am importing the os module)
> Steven Bethard wrote:
> Can you give the full exception message (i.e. copy-paste it from the
> output)?
M.N.A.Smadi top-posted:
this is the full error
Traceback (most recent call last):
File "./plugin.py", line 60, in ?
main()
File "./plugin.py", line 40, in main
os.system("/root/tmp/bibutils_3.14/isi2xml " + isi_file + " >
tmp_isi_xml.xml")
NameError: global name 'os' is not defined
Hmmm... I don't see how you'd get this if you're really importing the
os module (as you say above). Are you sure that you have 'import os' at
the top of plugin.py? You don't have any conditional wrapped around it
do you?
STeVe
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PythonWin line spacing
I've just downloaded and installed ActivePython and am trying to customize the PythonWin editor. Its line spacing seems to default to 2, and consequently, I cannot see many lines of code on a screen. How do I set the line spacing to 1? Thomas Philips -- http://mail.python.org/mailman/listinfo/python-list
Re: Web framework
Gianluca Sartori wrote: > Hi guys, > > What web framework do you suggest to develop with? I really like CherryPy. It has a very intuitive design. A "directory" is an object and the "files" in it are methods. URL variables are passed as arguments to the methods. The CherryPy site has a good tutorial and some examples that should get you up and running fairly quickly. http://www.cherrypy.org > Thanks for any suggestion, > Gianluca Hope this helps. Christian -- http://mail.python.org/mailman/listinfo/python-list
RE: running programs from within python
Title: RE: running programs from within python [James Stroud] #- import os He says he did it: #- > > M.N.A.Smadi wrote: #- > >> (and yes i am importing the os module) But he still didn't paste the code here . Facundo Bitácora De Vuelo: http://www.taniquetil.com.ar/plog PyAr - Python Argentina: http://pyar.decode.com.ar/ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ADVERTENCIA. La información contenida en este mensaje y cualquier archivo anexo al mismo, son para uso exclusivo del destinatario y pueden contener información confidencial o propietaria, cuya divulgación es sancionada por la ley. Si Ud. No es uno de los destinatarios consignados o la persona responsable de hacer llegar este mensaje a los destinatarios consignados, no está autorizado a divulgar, copiar, distribuir o retener información (o parte de ella) contenida en este mensaje. Por favor notifíquenos respondiendo al remitente, borre el mensaje original y borre las copias (impresas o grabadas en cualquier medio magnético) que pueda haber realizado del mismo. Todas las opiniones contenidas en este mail son propias del autor del mensaje y no necesariamente coinciden con las de Telefónica Comunicaciones Personales S.A. o alguna empresa asociada. Los mensajes electrónicos pueden ser alterados, motivo por el cual Telefónica Comunicaciones Personales S.A. no aceptará ninguna obligación cualquiera sea el resultante de este mensaje. Muchas Gracias. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a short-circuiting dictionary "get" method?
Dave Opstad wrote:
> In this snippet:
>
> d = {'x': 1}
> value = d.get('x', bigscaryfunction())
>
> the bigscaryfunction is always called, even though 'x' is a valid key.
> Is there a "short-circuit" version of get that doesn't evaluate the
> second argument if the first is a valid key? For now I'll code around
> it, but this behavior surprised me a bit...
Well, if the dict only contains ints, here is a dirty hack (but don't
use it instead of the try/except approach):
class Littletinyproxy:
def __int__(self):
return bigscaryfunction()
d = dict(x=1)
value = int(d.get('x', Littletinyproxy()))
Reinhold
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Re: running programs from within python
You should
import os
On Wednesday 09 March 2005 10:06 am, M.N.A.Smadi wrote:
> this is the full error
>
>
> Traceback (most recent call last):
> File "./plugin.py", line 60, in ?
> main()
> File "./plugin.py", line 40, in main
> os.system("/root/tmp/bibutils_3.14/isi2xml " + isi_file + " >
> tmp_isi_xml.xml")
> NameError: global name 'os' is not defined
>
> smadi
>
> Steven Bethard wrote:
> > M.N.A.Smadi wrote:
> >> am getting an error in the script as follows:
> >>
> >> NameError: global name 'os' is not defined
> >>
> >> however i dont get the same error when running from the python CLI.
> >> (and yes i am importing the os module)
> >
> > Can you give the full exception message (i.e. copy-paste it from the
> > output)?
> >
> > STeVe
--
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UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095
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Second argument to super().
What is the purpose of the second argument to super()? What is meant by the returning of an 'unbound' object when the argument is omitted. Also, when would I pass an object as the second argument, and when would I pass a type? Thanks, Tobiah -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a short-circuiting dictionary "get" method?
F. Petitjean wrote:
Le Wed, 09 Mar 2005 09:45:41 -0800, Dave Opstad a écrit :
Is there a "short-circuit" version of get that doesn't evaluate the
second argument if the first is a valid key? For now I'll code around
it, but this behavior surprised me a bit...
def scary():
print "scary called"
return 22
d = dict(x=1)
d.get('x', lambda *a : scary())
# print 1
d.get('z', (lambda *a : scary())())
scary called
22
So you have to change the code at the point of call depending on whether the requested value is in
the dict? ;)
If you can get this to work I'm sure we can find other applications for such
'smart code' :-)
Kent
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RE: Forums based on python
Title: RE: Forums based on python [EMAIL PROTECTED] #- HI #- I AM NEW TO PROGRAMING PRESENTLY I AM USING WINDOWS ME AND WHAT I SAW IN PYTHON INTEREST ME ANN AWFUL LOT. I DOWNLOADED VERSION 2.4 AND I #- TRIED TO GET MY PROGRAM "HELLO WORLD" ETC I SAVED ALL PROGRAMS BUT WHEN I WANT TO RUN IT I CAN'T FIND UNDER EDIT=RUN SCRIPT = WHERE CAN I #- GO TO RUN MY BEGINNING PROGRAMS. DID I DOWNLOAD THE WRONG VERSION #- THANK YOU FOR ANY HELP #- EDWARD A message like... """ Hi, I'm new to programming. Presently I'm using Windows ME and what I saw in Python interest me a lot. I downloaded the version 2.4, and I tried to get my program "Hello world", etc... I saved all programs but when I want to run it I can't find under "Edit"/"Run script". Where can I go to run my beginning programs? Did I download the wrong version? Thank you for any help Edward """ will bring you more help. Note that I'm not considering the actual sense of your words, just the format. Regards, . Facundo Bitácora De Vuelo: http://www.taniquetil.com.ar/plog PyAr - Python Argentina: http://pyar.decode.com.ar/ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ADVERTENCIA. La información contenida en este mensaje y cualquier archivo anexo al mismo, son para uso exclusivo del destinatario y pueden contener información confidencial o propietaria, cuya divulgación es sancionada por la ley. Si Ud. No es uno de los destinatarios consignados o la persona responsable de hacer llegar este mensaje a los destinatarios consignados, no está autorizado a divulgar, copiar, distribuir o retener información (o parte de ella) contenida en este mensaje. Por favor notifíquenos respondiendo al remitente, borre el mensaje original y borre las copias (impresas o grabadas en cualquier medio magnético) que pueda haber realizado del mismo. Todas las opiniones contenidas en este mail son propias del autor del mensaje y no necesariamente coinciden con las de Telefónica Comunicaciones Personales S.A. o alguna empresa asociada. Los mensajes electrónicos pueden ser alterados, motivo por el cual Telefónica Comunicaciones Personales S.A. no aceptará ninguna obligación cualquiera sea el resultante de este mensaje. Muchas Gracias. -- http://mail.python.org/mailman/listinfo/python-list
RE: Problematic behavior of the import statement when several modulefiles have the same name.
Xif wrote:
> Here's a problem with relative imports:
>
> Suppose I have a package called some_package (in a separate directory
> included in the PYTHONPATH, with an __init__.py file etc.)
>
> This package has a module inside the directory, called "database", and
> therefore residing in the file some_package/database.py.
>
> Now, what if there's another module, for example inside the
> site-packages directory, with the same file name (i.e. database.py)?
>
> We have a problem. Since although these modules have
> different absolute
> names ("some_package.database" for the first module, and just
> "database" for the second), when I try to do
>
> import database
>
> from inside some_package, it first of all tries to find the matching
> file in the some_package directory (i.e. do a relative import). Since
> it first checks the some_package directory, and finds database.py
> there,
>
> import database
>
> in fact imports the module with the absolute name
> some_package.database.
>
> This is problemat on two levels:
>
> 1) It is surprising and undesirable that "import database" in effect
> may do two completely different things ("import some_package.database"
> or "import database") depending on an external, unpredictable factor:
> the existence of a database.py file inside the some_package directory.
>
> 2) It effectively prevents you from naming a module inside a package
> with the same name of any module in the "root" PYTHONPATH directories.
> In my example, there's no sane way I can see of having
> some_package.database if there's already a database module
> (database.py
> file) in any PYTHONPATH directory.
>
> Are my observations correct? Is there something I ignored? Should
> this be posted somewhere else?
Short answer: don't use relative imports:
from some_package import database
http://docs.python.org/ref/import.html
Robert Brewer
MIS
Amor Ministries
[EMAIL PROTECTED]
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Re: Is there a short-circuiting dictionary "get" method?
On 09 Mar 2005 18:13:01 GMT, F. Petitjean <[EMAIL PROTECTED]> wrote:
> Le Wed, 09 Mar 2005 09:45:41 -0800, Dave Opstad a écrit :
> > In this snippet:
> >
> > d = {'x': 1}
> > value = d.get('x', bigscaryfunction())
> >
> > the bigscaryfunction is always called, even though 'x' is a valid key.
> > Is there a "short-circuit" version of get that doesn't evaluate the
> > second argument if the first is a valid key? For now I'll code around
> > it, but this behavior surprised me a bit...
> def scary():
> print "scary called"
> return 22
>
> d = dict(x=1)
> d.get('x', lambda *a : scary())
>
> # print 1
> d.get('z', (lambda *a : scary())())
> scary called
> 22
but:
>>> d.get('x', (lambda *a: test())())
test called
1
So how is this different than d.get('x', test()) ?
Peace
Bill Mill
bill.mill at gmail.com
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Re: Is there a short-circuiting dictionary "get" method?
On 9 Mar 2005 10:05:21 -0800, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
> Maybe this can help:
>
> value = d.get('x', lambda: bigscaryfunction())
>>> def test(): print 'gbye'
...
>>> d = {}
>>> z = d.get('x', lambda: test())
>>> z
at 0x008D6870>
So this seems to be merely an obfuscation of:
>>> z = d.get('x', test)
>>> z
I just wanted to ask, am I missing something?
Peace
Bill Mill
bill.mill at gmail.com
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Re: Is there a short-circuiting dictionary "get" method?
Le Wed, 09 Mar 2005 09:45:41 -0800, Dave Opstad a écrit :
> In this snippet:
>
> d = {'x': 1}
> value = d.get('x', bigscaryfunction())
>
> the bigscaryfunction is always called, even though 'x' is a valid key.
> Is there a "short-circuit" version of get that doesn't evaluate the
> second argument if the first is a valid key? For now I'll code around
> it, but this behavior surprised me a bit...
def scary():
print "scary called"
return 22
d = dict(x=1)
d.get('x', lambda *a : scary())
# print 1
d.get('z', (lambda *a : scary())())
scary called
22
First (wrong) version :
d.get('z', lambda *a : scary())
at 0x40598e9c>
>
> Dave
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Re: Is there a short-circuiting dictionary "get" method?
Maybe this can help:
value = d.get('x', lambda: bigscaryfunction())
Bearophile
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Re: Popen3 and capturestderr
On Wed, Mar 09, 2005 at 06:17:50AM -, Donn Cave wrote:
> Quoth Kenneth Pronovici <[EMAIL PROTECTED]>:
> ...
> | If ignoreStderr=False, I use popen2.Popen4 so that stderr and stdout are
> | intermingled. If ignoreStderr=True, I use popen2.Popen3 with
> | capturestderr=True so stderr doesn't appear in the output. This
> | functionality exists so I have an equivalent of command-line redirection
> | of stderr, i.e. command 2>/dev/null.
> ...
> | After some digging, I've decided that this behavior probably occurs
> | because I am ignoring the pipe.childerr file object. Indeed, if I call
> | pipe.childerr.close() right after opening the pipe, my "ls" command that
> | had been hanging completes normally. However, other commands which
> | actually attempt to write to stderr don't seem to like this very much.
> |
> | What is the right way to discard stderr when working with a pipe? I
> | want to consistently throw it away, and I don't see a good way to do
> | this with the popen2 implementation.
>
> Right, popen2 gives you about 3 options, out of probably dozens that
> you could get with shell redirections. On the other hand, the source
> is available, and Python is an OOP language, so I assume there is no
> reason you can't make a derived class that does just what you want.
> In the present case I guess that would mean something like
>null = os.open('/dev/null', os.O_RDWR)
>os.dup2(null, 0)
>os.dup2(null, 2) (depending)
>os.close(null)
> along with other stuff you can just copy from Popen4.
Ah... ok, subclassing is an option I hadn't considered. I'll give that
a whirl and see whether I can make it work.
KEN
--
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Personal Homepage: http://www.skyjammer.com/~pronovic/
"They that can give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
- Benjamin Franklin, Historical Review of Pennsylvania, 1759
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Re: running programs from within python
this is the full error
Traceback (most recent call last):
File "./plugin.py", line 60, in ?
main()
File "./plugin.py", line 40, in main
os.system("/root/tmp/bibutils_3.14/isi2xml " + isi_file + " >
tmp_isi_xml.xml")
NameError: global name 'os' is not defined
smadi
Steven Bethard wrote:
M.N.A.Smadi wrote:
am getting an error in the script as follows:
NameError: global name 'os' is not defined
however i dont get the same error when running from the python CLI.
(and yes i am importing the os module)
Can you give the full exception message (i.e. copy-paste it from the
output)?
STeVe
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Forums based on python
HI I AM NEW TO PROGRAMING PRESENTLY I AM USING WINDOWS ME AND WHAT I SAW IN PYTHON INTEREST ME ANN AWFUL LOT. I DOWNLOADED VERSION 2.4 AND I TRIED TO GET MY PROGRAM "HELLO WORLD" ETC I SAVED ALL PROGRAMS BUT WHEN I WANT TO RUN IT I CAN'T FIND UNDER EDIT=RUN SCRIPT = WHERE CAN I GO TO RUN MY BEGINNING PROGRAMS. DID I DOWNLOAD THE WRONG VERSION THANK YOU FOR ANY HELP EDWARD -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a short-circuiting dictionary "get" method?
Dave,
On Wed, 09 Mar 2005 09:45:41 -0800, Dave Opstad <[EMAIL PROTECTED]> wrote:
> In this snippet:
>
> d = {'x': 1}
> value = d.get('x', bigscaryfunction())
>
> the bigscaryfunction is always called, even though 'x' is a valid key.
> Is there a "short-circuit" version of get that doesn't evaluate the
> second argument if the first is a valid key? For now I'll code around
> it, but this behavior surprised me a bit...
There is no short-circuit function like you're asking for, because
it's impossible in python. To pass an argument to the 'get' function,
python evaluates the bigscaryfunction before calling 'get'.
(I believe this means that python doesn't have "lazy evaluation", but
the language lawyers may shoot me down on that. Wikipedia seems to say
that it means python doesn't have "delayed evaluation").
Here are two ways to do what you want:
if 'x' in d: value = d['x']
else: value = bigscaryfunction()
or:
def sget(dict, key, func, *args):
if key in dict: return key
else: return func(*args)
sget(d, 'x', bigscaryfunction)
Both methods are untested, but should work with minor modifications.
Peace
Bill Mill
bill.mill at gmail.com
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Re: Is there a short-circuiting dictionary "get" method?
Dave Opstad wrote:
In this snippet:
d = {'x': 1}
value = d.get('x', bigscaryfunction())
the bigscaryfunction is always called, even though 'x' is a valid key.
Is there a "short-circuit" version of get that doesn't evaluate the
second argument if the first is a valid key? For now I'll code around
it, but this behavior surprised me a bit...
try:
value = d['x']
except KeyError:
value = bigscaryfunction()
get() is just a method, and arguments to methods are always
evaluated before being passed to the method, so the short
answer is "no, there is no 'version' of get() that will do
what you want".
-Peter
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Is there a short-circuiting dictionary "get" method?
In this snippet:
d = {'x': 1}
value = d.get('x', bigscaryfunction())
the bigscaryfunction is always called, even though 'x' is a valid key.
Is there a "short-circuit" version of get that doesn't evaluate the
second argument if the first is a valid key? For now I'll code around
it, but this behavior surprised me a bit...
Dave
--
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Problematic behavior of the import statement when several module files have the same name.
Hello Everyone!
Here's a problem with relative imports:
Suppose I have a package called some_package (in a separate directory
included in the PYTHONPATH, with an __init__.py file etc.)
This package has a module inside the directory, called "database", and
therefore residing in the file some_package/database.py.
Now, what if there's another module, for example inside the
site-packages directory, with the same file name (i.e. database.py)?
We have a problem. Since although these modules have different absolute
names ("some_package.database" for the first module, and just
"database" for the second), when I try to do
import database
from inside some_package, it first of all tries to find the matching
file in the some_package directory (i.e. do a relative import). Since
it first checks the some_package directory, and finds database.py
there,
import database
in fact imports the module with the absolute name
some_package.database.
This is problemat on two levels:
1) It is surprising and undesirable that "import database" in effect
may do two completely different things ("import some_package.database"
or "import database") depending on an external, unpredictable factor:
the existence of a database.py file inside the some_package directory.
2) It effectively prevents you from naming a module inside a package
with the same name of any module in the "root" PYTHONPATH directories.
In my example, there's no sane way I can see of having
some_package.database if there's already a database module (database.py
file) in any PYTHONPATH directory.
Are my observations correct? Is there something I ignored? Should
this be posted somewhere else?
Your comments would be appreciated.
Xif
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Help with socket staus
Hello, First let me say hello since I am new to this list. Recently I downloaded and installed the c3 suite of python2 scripts so that I can execute commands on multiple unix nodes. What I am looking to do is determine when an ssh connection fails (either sshd has been stopped, the node is not in service, etc). I have been unable to find good documentation to help me resolve this issue. The message that I receive when ssh fails is this: ssh: connect to host test.node.com port 22: Connection refused So I guess my question is this...are there any methods to determine the state of a socket connection (i.e connected, no connected, connection failed, etc). Thanks in advance, Shain -- http://mail.python.org/mailman/listinfo/python-list
Re: logging addLevelName
[EMAIL PROTECTED] wrote:
I am trying to add a new logging level.
logging.config.fileConfig("bengineLog.cfg")
logging.CLIENT = logging.INFO + 1
logging.addLevelName( logging.CLIENT, 'CLIENT' )
logging.root.setLevel( [logging.INFO, logging.CLIENT, logging.WARNING,
logging.ERROR, logging.CRITICAL] )
logger = logging.getLogger(None)
logging.Logger.client('test')
I get error:
AttributeError: class Logger has no attribute 'client'
Any help?
Looks like what you want is logger.log(). Here is an example that takes
your addLevelName code and logs at levels info to critical:
#!/usr/bin/env python
import logging
#create new log level
logging.CLIENT = logging.INFO + 1
logging.addLevelName(logging.CLIENT, "CLIENT")
logging.root.setLevel([logging.INFO, logging.CLIENT, logging.WARNING,
logging.ERROR, logging.CRITICAL])
#create logger with "mylogger"
logger = logging.getLogger("mylogger")
logger.setLevel(logging.INFO)
#create file handler and set level to debug
fh = logging.FileHandler("test.log")
fh.setLevel(logging.DEBUG)
#create console handler and set level to debug
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
#create formatter
formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s -
%(message)s")
#add formatter to handlers
fh.setFormatter(formatter)
ch.setFormatter(formatter)
#add handlers to logger
logger.addHandler(fh)
logger.addHandler(ch)
logger.debug("this is debug")
logger.info("this is info")
logger.log(logging.CLIENT, "this is client")
logger.warning("this is warning")
logger.error("this is error")
logger.critical("this is critical")
It produces this output:
2005-03-09 12:28:33,399 - mylogger - INFO - this is info
2005-03-09 12:28:33,401 - mylogger - CLIENT - this is client
2005-03-09 12:28:33,458 - mylogger - WARNING - this is warning
2005-03-09 12:28:33,460 - mylogger - ERROR - this is error
2005-03-09 12:28:33,518 - mylogger - CRITICAL - this is critical
HTH,
Jeremy Jones
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Re: running programs from within python
M.N.A.Smadi wrote: am getting an error in the script as follows: NameError: global name 'os' is not defined however i dont get the same error when running from the python CLI. (and yes i am importing the os module) Can you give the full exception message (i.e. copy-paste it from the output)? STeVe -- http://mail.python.org/mailman/listinfo/python-list
RE: running programs from within python
Title: RE: running programs from within python [M.N.A.Smadi] #- am getting an error in the script as follows: #- #- NameError: global name 'os' is not defined What script? Please paste it here. If it's more than 20 lines, trim it until you find the smaller script that has the error. . Facundo Bitácora De Vuelo: http://www.taniquetil.com.ar/plog PyAr - Python Argentina: http://pyar.decode.com.ar/ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ADVERTENCIA. La información contenida en este mensaje y cualquier archivo anexo al mismo, son para uso exclusivo del destinatario y pueden contener información confidencial o propietaria, cuya divulgación es sancionada por la ley. Si Ud. No es uno de los destinatarios consignados o la persona responsable de hacer llegar este mensaje a los destinatarios consignados, no está autorizado a divulgar, copiar, distribuir o retener información (o parte de ella) contenida en este mensaje. Por favor notifíquenos respondiendo al remitente, borre el mensaje original y borre las copias (impresas o grabadas en cualquier medio magnético) que pueda haber realizado del mismo. Todas las opiniones contenidas en este mail son propias del autor del mensaje y no necesariamente coinciden con las de Telefónica Comunicaciones Personales S.A. o alguna empresa asociada. Los mensajes electrónicos pueden ser alterados, motivo por el cual Telefónica Comunicaciones Personales S.A. no aceptará ninguna obligación cualquiera sea el resultante de este mensaje. Muchas Gracias. -- http://mail.python.org/mailman/listinfo/python-list
Re: running programs from within python
am getting an error in the script as follows: NameError: global name 'os' is not defined however i dont get the same error when running from the python CLI. (and yes i am importing the os module) is this a bug in python 2.3 (the one am currently using) thanks m.smadi Steven Bethard wrote: M.N.A.Smadi wrote: M.N.A.Smadi wrote: hi; in general: how can i pass a string containing a concatenated sequcne of command line arguments to a unix system CLI? i guess i will answer myself: import os os.system(string) Also worth noting is that if you're using Python 2.4, you might want to look at the subprocess module, which replaces many of the older os.* calls with a more flexible interface. For the os.system replacement, see: http://docs.python.org/lib/node235.html STeVe -- http://mail.python.org/mailman/listinfo/python-list
Re: [CherryPy]Serve dynamic binary file in cherrypy?
"mep" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > Hi, > After lookup in cherrypy site and google for a while, I haven't > found any information about cherrypy how to serve dynamic binary > file(some generated charts).Is there any easy way to do this? > In cherrypy 2.0 & python 2.4 Yes, there is an easy way: have your handler method return the binary data, and set the Content-Type before returning the data, like this: # class Root: # def index(self): # ... Generate binary data in "data" ... # cpg.response.headerMap['Content-Type'] = 'image/gif' # return data Remi. -- http://mail.python.org/mailman/listinfo/python-list
Re: running programs from within python
M.N.A.Smadi wrote: M.N.A.Smadi wrote: hi; in general: how can i pass a string containing a concatenated sequcne of command line arguments to a unix system CLI? i guess i will answer myself: import os os.system(string) Also worth noting is that if you're using Python 2.4, you might want to look at the subprocess module, which replaces many of the older os.* calls with a more flexible interface. For the os.system replacement, see: http://docs.python.org/lib/node235.html STeVe -- http://mail.python.org/mailman/listinfo/python-list
RE: running programs from within python
Title: RE: running programs from within python [M.N.A.Smadi] #- i guess i will answer myself: #- import os #- os.system(string) If you have Py2.4, it's better to use subprocess(). . Facundo Bitácora De Vuelo: http://www.taniquetil.com.ar/plog PyAr - Python Argentina: http://pyar.decode.com.ar/ -- http://mail.python.org/mailman/listinfo/python-list
SOAPpy Interoperability w/AXIS C++
Hello, I am having some trouble getting a Python client written using SOAPpy 0.11.6 to work with a Web Service that is published using AXIS C++ version 1.4. I have a C++ client working, and I am able to compare the SOAP messages that are being sent by it and the Python client. It appears as though the only difference is the definition of the XML Schema and XML Schema-instance namespace. The C++ client refers to the 2001 versions, but the Python client refers to the 1999 versions. Has anyone run into a similar problem and been able to find a work around? Thanks in advance for any help. Regards, Jeremy Kohansimeh -- http://mail.python.org/mailman/listinfo/python-list
Re: running programs from within python
M.N.A.Smadi wrote:
hi;
in general: how can i pass a string containing a concatenated sequcne
of command line arguments to a unix system CLI?
my specific problem:
i have an executable that is called xyz (written in C if that matters)
that i cannot modify, which prints it is text output to the screen and
takes an input as t.txt.
on a unix terminal, i do the ./xyz t.txt > tmp.txt
so that the tmp.txt will contain the output of the xyz executable
i tried the following but it did not work
import os
os.execl("./xyz","t.txt > tmp.txt") #the thing just hangs there
i aslo tried
os.execl("./xyz","t.txt") # but it does not output anything to the
screen either, hangs there too
any suggestions?
thanks
m.smadi
i guess i will answer myself:
import os
os.system(string)
!!
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running programs from within python
hi;
in general: how can i pass a string containing a concatenated sequcne of
command line arguments to a unix system CLI?
my specific problem:
i have an executable that is called xyz (written in C if that matters)
that i cannot modify, which prints it is text output to the screen and
takes an input as t.txt.
on a unix terminal, i do the ./xyz t.txt > tmp.txt
so that the tmp.txt will contain the output of the xyz executable
i tried the following but it did not work
import os
os.execl("./xyz","t.txt > tmp.txt") #the thing just hangs there
i aslo tried
os.execl("./xyz","t.txt") # but it does not output anything to the
screen either, hangs there too
any suggestions?
thanks
m.smadi
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MDaemon Warning - virus found: RETURNED MAIL: SEE TRANSCRIPT FOR DETAILS
*** WARNING ** Este mensaje ha sido analizado por MDaemon AntiVirus y ha encontrado un fichero anexo(s) infectado(s). Por favor revise el reporte de abajo. AttachmentVirus name Action taken -- mail.zip Email-Worm.Win32.Mydoom.m Removed ** The message was not delivered due to the following reason: Your message could not be delivered because the destination computer was not reachable within the allowed queue period. The amount of time a message is queued before it is returned depends on local configura- tion parameters. Most likely there is a network problem that prevented delivery, but it is also possible that the computer is turned off, or does not have a mail system running right now. Your message was not delivered within 5 days: Host 197.51.128.93 is not responding. The following recipients did not receive this message: Please reply to [EMAIL PROTECTED] if you feel this message to be in error. -- http://mail.python.org/mailman/listinfo/python-list
Web framework
Hi guys, What web framework do you suggest to develop with? I had a look both at Nevow and Quixote. These seemes to be the most appreciated by the community. Anyway, I had no luck looking for a complete and coherent documentation. Thanks for any suggestion, Gianluca -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] a program to delete duplicate files
On 9 Mar 2005 04:56:13 -0800, rumours say that "Xah Lee" <[EMAIL PROTECTED]> might have written: >Write a Perl or Python version of the program. > >a absolute requirement in this problem is to minimize the number of >comparison made between files. This is a part of the spec. http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/de90435f3e56ab0c/048e292ec9adb82d The whole thread is about finding duplicate files. -- TZOTZIOY, I speak England very best. "Be strict when sending and tolerant when receiving." (from RFC1958) I really should keep that in mind when talking with people, actually... -- http://mail.python.org/mailman/listinfo/python-list
Re: Your suggestions re virus, round 6: Virus KO
Josef, I'll definitely take a close look at all the suggestions I have been offered, in the interest of future damage prevention. This time, though, the fight is over and I emerge victorious! Poking around here and I came across huge startup or execution log files listing rather unabashed file names. Since I'm not into that, how did it get there? Turned out the files were all identical and also identical to the attachment of each one of the many obviously automated decoy messages I have been getting of late (like: 'Offer expires today', or 'I'm shocked! Is that really you', etc.). (Not that I ever opened any one oif them.) Anyway, I scanned the whole disk for files of identical lenght and ended up with 869 copies of the obnoxity. One of them was C:\WINDOWS\fvprotect.exe--a windows process of all things. I eradicated the whole lot and now all is well. I don't believe any damage was caused, except that the Norton virus scanner still won't start. Perhaps another install will fix that too. Linux is next. Do you know of a good disk-partitioning program? Frederic - Original Message - From: "Josef Albert Meile" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, March 09, 2005 12:23 PM Subject: Re: Your suggestions re virus, round 5 > Hi Frederic, > > >Protected mode doesn't make any difference with respect to stuff not > >running. Plus it doesn't connect to the internet. So I went back to > >unprotected mode to download WinTask. I played around with it for a while > >without being able to figure out how it works. All the while my resolve > >strengthened to start everyting from scratch and take the opportunity to > >install Linux. I startet uninstalling stuff I never use and started hunting > >for the original media of the stuff I do use and already face the > >predicament of not finding some. I imagine an uninstaller that saves an > >application and restores it from the save. Do you know of any such thing? > Sorry, I don't know if such thing exists. But anyway, at last alternative, I > will > do a backup of the important files and reinstall everything. > > There is another alternative, but you have to know what you are doing: > http://www.hijackthis.de > > You can also get a log of the running processes with this tool and do an > online analysis on the hijackthis.de website. There are also forums there > where you can ask. > > Good luck, > Josef > > _ > Don't just search. Find. Check out the new MSN Search! > http://search.msn.click-url.com/go/onm00200636ave/direct/01/ > -- http://mail.python.org/mailman/listinfo/python-list
Re: i18n: looking for expertise
Michael: on my box, (winXP SP2), sys.getfilesystemencoding() returns 'mbcs'. If you post your revised solution to this unicode problem, I'd be delighted to test it on Windows. I'm working on a Tkinter front-end for Vivian deSmedt's rsync.py and would like to address the issue of accented characters in folder names. thanks Stewart stewart dot midwinter at gmail dot com -- http://mail.python.org/mailman/listinfo/python-list
Re: Split text file into words
qwweeeit wrote:
>ll=re.split(r"[\s,{}[]()+=-/*]",i)
The stack overflow comes because the ()+ tried to match an empty string as
many times as possible.
This regular expression contains a character set '\s,{}[' followed by the
expression '()+=-/*]'. You can see that the parentheses aren't part of a
character set if you reverse their order which gives you an error when the
expression is compiled instead of failing when trying to match:
>>> ll=re.split(r"[\s,{}[])(+=-/*]",i)
Traceback (most recent call last):
File "", line 1, in -toplevel-
ll=re.split(r"[\s,{}[])(+=-/*]",i)
File "C:\Python24\Lib\sre.py", line 157, in split
return _compile(pattern, 0).split(string, maxsplit)
File "C:\Python24\Lib\sre.py", line 227, in _compile
raise error, v # invalid expression
error: unbalanced parenthesis
>>>
I suspect you actually meant the character set to include the other
punctuation characters in which case you need to escape the closing square
bracket or make it the first character:
Try:
ll=re.split(r"[\s,{}[\]()+=-/*]",i)
or:
ll=re.split(r"[]\s,{}[()+=-/*]",i)
instead.
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Re: Python COM Class Question
pemo wrote:
I'm trying to use difflib.py from a COM aware language - and, for ease of
use, I'm initially trying to get this going from VB6.
I've wrappered difflib.py correctly I think, and I can now call into it and
call a global method (called 'test' of course). Here's the consuming code:
Dim PythonUtils As Object
Set PythonUtils = CreateObject("DiffLib.Utils")
Debug.Print PythonUtils.test()
However, difflib contains classes - like SequenceMatcher, and I've no idea
how to get an instance of these from PythonUtils.
Can someone help me here please?
I hope so.
You need to wrap the Python objects for use in the COM framework - once
wrapped their methods can be called by the client code.
You'll find wrap in win32com.server.util.
regards
Steve
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Re: Working on a log in script to my webpage
Pete. wrote: I better mention, that I rather make it all in python and html (found out that python somehow works with asp) I know that what I have to do is the following: 1) When the user logs in, I have to store a session ID in a cookie In actual fact it's best not to wait until the user logs in: every request that comes in for the service should be examined for the cookie (which the browser will always return once it's received it). If there's no cookie then the server should include one in its response. That way, each session is identified by a unique cookie value, which can be used (among other things) to locate any state that's associated with the sessions (such as a "who is this user" variable). 2) When page1 is loaded(upon correctly entered username/password) the cookie has to be sent to page 1 and on page one there should be a tjeck to see if the cookies has the right values. Not quite: the cookie (retained on the client and sent to the server with each request) just identifies the session, and the session state storage (maintained on the server, one per active session) holds the information about the session like whether the user has logged in, what's in their shopping cart, and so on. Each page (or, if you are using an application framework like Webware, the framework) can examine state memory to determine whether the conditions for access have been met, and redirect to an error page if not. For this purpose ASP maintained a "Session" object for each session's state memory. 3) everytime a page is loaded, there has to be a tjeck, to see if the cookies has the right value, if not the page shouldt be loaded, and the user should be redirected back to login page. Almost, see above. It does sound very easy to make: Create a store-holder(cookies), create a session ID upon log in, tjeck if it is the right sessionID in the cookies everytime a page is loaded, if not redirect back to log in page. But eventhough it sounds easy, I cant quite get the hold of if.. I tried googling, but didnt really find anything, that helpfull... It's true that there isn't actually much on the web that explains sessions with specific reference to Python. I can, however, after quite a lot of searching, thoroughly recommend http://webapparch.sourceforge.net/ for an overview of what happens in a session-oriented web service. I would suggest you start with Section 8, and then read the whole thing, or at least all parts that interest you. Any more advice... Of course usually some mechanism supported by the specific server in use is involved. http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65110 does show how to generate session IDs, but then you have to deliver them as cookies (of course, for security reasons you don't want session IDs to be easily guessed, as this would allow someone to "hijack" an existing session by impersonating a browser holding the right cookie value). If you are prepared to read a bit of PHP (sorry ...) then http://www.phpbuilder.com/columns/paul20020729.php3 explains the details of session maintenance sufficiently clearly that you would get a good idea of how to implement the same ideas in Python. Once again thanks for your time Sincerly Pete [...] You're welcome. regards Steve -- http://mail.python.org/mailman/listinfo/python-list
Re: Split text file into words
I thank you for your help.
I already used re.split successfully but in this case...
I didn't explain more deeply because I don't want someone else do my
homework.
I want to implement a variable & commands cross reference tool.
For this goal I must clean the python source from any comment and
manifest string.
On the cleaned source file I must isolate all the words (keeping the
words connected by '.')
My wrong code (don't consider the line ref. in traceback ... it's an
extract!):
import re
# input text file w/o strings & comments
f=open('file.txt')
lInput=f.readlines()
f.close()
fOut=open('words.txt','w')
for i in lInput:
. ll=re.split(r"[\s,{}[]()+=-/*]",i)
. fOut.write(' '.join(ll)+'\n')
fOut.close()
Traceback (most recent call last):
File "./GetWords.py", line 70, in ?
ll=re.split(r"[\s,{}[]()+=-/*]",i)
File "/usr/lib/python2.3/sre.py", line 156, in split
return _compile(pattern, 0).split(string, maxsplit)
RuntimeError: maximum recursion limit exceeded
... and if I use:
ll=re.split(r"\s,{}[]()+=-/*",i)
Traceback (most recent call last):
File "./GetWords.py", line 70, in ?
ll=re.split(r"\s,{}[]()+=-/*",i)
File "/usr/lib/python2.3/sre.py", line 156, in split
return _compile(pattern, 0).split(string, maxsplit)
File "/usr/lib/python2.3/sre.py", line 230, in _compile
raise error, v # invalid expression
sre_constants.error: bad character range
I taught it was my mistake in the use of re.split...
I am using:
Python 2.3.4 (#2, Aug 19 2004, 15:49:40)
[GCC 3.4.1 (Mandrakelinux (Alpha 3.4.1-3mdk)] on linux2
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Re: Working on a log in script to my webpage
Thanks.
But I would really like to do this from scratch, so that I can learn it, I
dont think I need that much more, before it works.
I found an example with asp, where the save the session if the password is
correct. It isnt that long a code, so was wondering if it isnt possible to
make something like that in python. Cause when this code is applied to the
loginform, CODE2 will only have to be applied to every following page and
everything is good.
code is from:
http://tutorialized.com/tutorial/Creating-a-Members-Area-in-ASP/2234
CODE1
Set objRS = objConn.Execute (strSQL)
'// see if there are any records returned
If objRS.EOF Then
'no username found
strError = "- Invalid username or password" & vbNewLine
Else
'check password
If objRS("password")=Request.Form("password") Then
'username/password valid
'save session data
Session("loggedin") = True
Session("userid") = objRS("id")
'redirect to members area
Response.Redirect ("default.asp")
Response.End
Else
'invalid password
strError = "- Invalid username or password" & vbNewLine
CODE2<%
If Session("loggedin") <> True Then Response.Redirect "login.asp"
%>
Members Area
Members Area
Welcome to our members area!
In my code I have allready tested if the username and password is
correct, so I just need to do the cookie thing :D
Thanks all, hope all my questions dosnt make you tired, I just really wanna
figure this out, and I am doing this as a little hobby of mine, so I dont
have anyone else to ask, hope that is okay...
"Kent Johnson" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Pete. wrote:
>> Hi all I am working on a log in script for my webpage.
>>
>> I have the username and the password stored in a PostgreSQL database.
>
> You might want to look at Snakelets and CherryPy.
>
> Snakelets is "a very simple-to-use Python web application server." One of
> the features is "Easy user authentication and user login handling."
> http://snakelets.sourceforge.net/
>
> CherryPy is "a pythonic, object-oriented web development framework" that
> seems to be popular. A recipe for password-protected pages in CherryPy is
> here:
> http://www.cherrypy.org/wiki/PasswordProtectedPages
>
> Kent
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BayPIGgies: March 10, 7:30pm (FINAL MEETING AT STANFORD)
WARNING: the last meeting of BayPIGgies at Stanford is currently scheduled for March. Our host, Danny Yoo, is leaving Stanford, and we need to find a new location. If you wish to assist with the search, please join the BayPIGgies mailing list. Meanwhile, let's all give hearty thanks to Danny for helping us find a stable meeting location for so long! The next meeting of BayPIGgies will be Thurs, March 10 at 7:30pm. Donovan Preston will lead a discussion about using Python with OS X, including integrating with PyObjC and GNUStep. BayPIGgies meetings are in Stanford, California. For more information and directions, see http://www.baypiggies.net/ Before the meeting, we may meet at 6pm for dinner in downtown Palo Alto. Discussion of dinner plans is handled on the BayPIGgies mailing list. Advance notice: The April 14 meeting agenda has not been set. Please send e-mail to [EMAIL PROTECTED] if you want to suggest an agenda -- and a meeting place! -- Aahz ([EMAIL PROTECTED]) <*> http://www.pythoncraft.com/ "The joy of coding Python should be in seeing short, concise, readable classes that express a lot of action in a small amount of clear code -- not in reams of trivial code that bores the reader to death." --GvR -- http://mail.python.org/mailman/listinfo/python-list
Announcement: PyMatrix-0.0.1a Released
PyMatrix is a package to provide access to the functionality of matrix algebra. This package is currently based on numarray. It includes a statistics module which includes a basic analysis of variance. In the future it is hoped to enhance the generality of the divide operation, to add the transcendental functions as methods of the matrix class and to improve the documentation. The expectation is that Numeric3 will eventually replace numarray and that this will necessitate some changes to PyMatrix Downloads in the form of a Windows Installer (Inno) and a zip file are available at: http://www3.sympatico.ca/cjw/PyMatrix An /Introduction to PyMatrix/ is available: http://www3.sympatico.ca/cjw/PyMatrix/IntroToPyMatrix.pdf Information on the functions and methods of the matrix module is given at: http://www3.sympatico.ca/cjw/PyMatrix/Doc/matrix-summary.html Colin W. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to upgrade python on Redhat?
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > > 2) Give up and install python 2.4 in /usr/local. This leaves me in the > awkward situation of having to ensure that all our in-house scripts, > all the time use /usr/local/bin/python. Or, as recommended, use... #!/usr/bin/env python ...and make sure the scripts are run in an appropriately configured environment. Paul -- http://mail.python.org/mailman/listinfo/python-list
