🌐 Mailman 3 February 2005 - Python-list - python.org

Trouble using telentlib
by nitinzep＠yahoo.com Feb. 28, 2005

Feb. 28, 2005

I sarched the existing threads but didnt find an answer to this. I am writing simple script which uses telentlib to open a session with a unix machine and run "tail -f logfile.txt" on one of the logfiles. import telnetlib HOST = "192.X.X.X" user = "myname" password = "mypass" tn = telnetlib.Telnet(HOST) tn.read_until("login: ") tn.write(user + "\n") if password: tn.read_until("Password: ") tn.write(password + "\n") tn.write("tail -f /tmp/logfile.txt\n") # what do i write here ? # tn.write("exit\n") I want to read every line of the output into a string and run regex on it. I tried tn.interact() which does show me the ouput but the CPU usage on my win2k machine reaches 99% !! :( How do i execute a command and then read its output, then another command and read its output and so on. I tried to find docs on telnetlib but in vain. Can somebody guide me please Thanks Nitin

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Re: Trees
by Diez B. Roggisch Feb. 28, 2005

Feb. 28, 2005

> Writing a *simple* node class is easy, but a full-featured one that > supports things like comparison and easy iteration is a bit more work. So > various people write partial implementations with only the features they > need, and they all end up being incompatible. So beyond being able to use > it, the other thing is that having an implementation in the standard > library acts as a de facto interface standard, making it easier to write > common code to operate on tree structures. Hm. I disagree on that. Some things make only sense for binary trees, others need explicit uplinking to the parent node and so on. Some want accessor methods, others have certain operator overloadings used for a specific functionality. So in the end, it either becomes a monstrosity or is again not usable. But that's only my HO. > All it would take to make it happen is a PEP, an implementation and a > champion with some persuasive ability :) Go wild :) -- Regards, Diez B. Roggisch

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Re: TKinter
by Curt Feb. 28, 2005

Feb. 28, 2005

On 2005-02-27, James Stroud <jstroud(a)mbi.ucla.edu> wrote: > I thought the T was silent. Kay-Inner, nasally? >> So, is it pronounced 'Tee-Kinter', or 'Tee-Kay-Inter'? >> I don't want to appear as a dork down the pub. -- There is no intelligence without being. I believe the inverse to be equally true. It appears then that I have somehow misinterpreted your status. - G.C. Manstalz, in conversation

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Re: Trees
by eddie＠holyrood.ed.ac.uk Feb. 28, 2005

Feb. 28, 2005

Alex Le Dain <alex(a)psi.com.au> writes: >Is there a generic "tree" module that can enable me to sort and use >trees (and nodes). Basically having methods such as .AddNode(), >.GetAllChildren(), .FindNode() etc. http://newcenturycomputers.net/projects/rbtree.html might do most of what you want. Eddie

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Re: Python - what is the fastest database ?
by Peter Hansen Feb. 28, 2005

Feb. 28, 2005

PA wrote: > On Feb 28, 2005, at 13:10, martijn(a)gamecreators.nl wrote: >> What type database do they use / software ? > > Hmmm... they don't use a "database" in the traditional sense of the term. > > http://www-db.stanford.edu/~backrub/google.html Section "4.3 Crawling the Web" in that discusses the role Python plays in Google, at least in the form it (Google) had when this paper was written. -Peter

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Re: Python interfacing with other languages
by wuhy80 Feb. 28, 2005

Feb. 28, 2005

Sure It can work with VB. you could use the python's com to work with VB.

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Re: class factory example needed (long)
by Gary Ruben Feb. 28, 2005

Feb. 28, 2005

Thanks for the very helpful reply Rainer, I thought I couldn't use setattr because I need the syntactic sugar sqrt(f) to work, but with your example code Numeric.sqrt(f) does in fact work correctly. I also need to do a bit more than may be possible with a simple lambda function, but I should be able to sort it out from here with the info you provided, thanks again, Gary Rainer Mansfeld wrote: <snip> > Hi Gary, > > you want your 'class factory' to change the methods of Numeric, so that > they accept foo objects and return foo objects? > I've not the slightest idea how to achieve that. > > If OTOH you want your foo class to have sqrt, arccos, etc. methods > without defining them explicitly, I think you're looking for something > like: > > . import Numeric > . > . class Foo(object): > . def __init__(self, value): > . self.value = float(value) > . for u in ['sqrt', 'cos', 'tan']: > . setattr(self, u, lambda uf=getattr(Numeric, u): > . uf(self.value + 42.0)) > > >>> f = Foo(7) > >>> f.sqrt() > 7.0 > > HTH > Rainer >

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Polling selections from a listbox (Tkinter)
by Harlin Seritt Feb. 28, 2005

Feb. 28, 2005

I am trying to poll selections from a listbox but can't seem to get it to work correctly. class pollstuff: def __init__(self, master): self.listbox = Listbox(master) self.listbox.pack() names = ['Bob', 'Neal', 'Mike'] for n in names: self.listbox.insert(END, n) self.listbox.select_set(0) LabelStr = StringVar() self.label = Label(master, textvariable=LabelStr) self.label.pack() LabelStr.set(names[map(int, self.listbox.curselection())]) root = Tk() app = pollstuff(root) root.mainloop() Obviously when this starts up this is going to show selection #0 inside the label box. How do I make sure that whatever is arbitrarily selected ends up in the label box as this gui runs? I tried doing a bind: self.listbox.bind("<Button-1>", self.changelabel) This did not work as intended as the changelabel's text option only showed what the selection index was BEFORE the event took place. Does anyone know of any special thing I need to do in order to poll the listbox items? Thanks, Harlin

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Re: Fonts
by Eric Brunel Feb. 28, 2005

Feb. 28, 2005

On Fri, 25 Feb 2005 11:00:41 -0600, phil <phillip.watts(a)anvilcom.com> wrote: > I'm cpmpletely lost on fonts. > > I'm using Tkinter > > I do medarial = '-*-Arial-Bold-*-*--24-*-*-*-ISO8859-1" > or Courier or Fixed in various sizes. > > Works great on my RH 7.2 > > But a small embedded system Im working on, nothing seems to work, > almost everything falls back to a fixed 12 You should be able to use a font specification like (family, size [, style]), e.g ('helvetica', 24, 'bold'). This is the most portable way of specifying fonts (X11 font names may not work on some systems). You can get the available font families on your system as seen by Tkinter/tk with: from Tkinter import * import tkFont root = Tk() print tkFont.families() BTW - according to http://www.tcl.tk/man/tcl8.4/TkCmd/font.htm#M25 - the font family names 'helvetica', 'times' and 'courier' are guaranteed to work anywhere with tk/Tkinter. HTH -- python -c 'print "".join([chr(154 - ord(c)) for c in "U(17zX(%,5.z^5(17l8(%,5.Z*(93-965$l7+-"])'

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Re: simple input that can understand special keys?
by Tim G Feb. 28, 2005

Feb. 28, 2005

Gabriel B. wrote: > i'm writting an application that will use Tinker in a newer future. > Now it's console only. I simply ommit some data on the display, > print() some other and go on. The problem is that i can't test the > actions tiggered by special keys, like Page Up/Down or the F1...12 > > Right now i'm using raw_input() since even the Tk version will have > only one input place, and for debuging i'm literally writting pageup, > pagedow and the F's. But i want to put it in test while i write the > GUI. > > is there any hope for me? I wanted to stay only with the console for > now. And it's windows by the way :) > > Thanks This is a notoriously un-cross-platform sort of issue. Don't know about Tk, but for Windows, you could use one of the existing console/curses packages: Chris Gonnerman's WConIO: http://newcenturycomputers.net/projects/wconio.html The effbot's console module: http://effbot.org/zone/console-index.htm or a Win32 curses port: http://flangy.com/dev/python/curses/ or you could splash out a bit and go for Pygame, which gives you pretty much complete control over pretty much everything: http://pygame.org or you could use the part-of-the-batteries mscvrt module: http://www.python.org/doc/2.4/lib/msvcrt-console.html TJG

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