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

Re: Parse or Pass?
by frenchy64 Sept. 4, 2007

Sept. 4, 2007

> In general, "parsing" is analyzing the grammatical structure of a > string. People sometimes talk loosely about "parsing the command line". > but I don't think that's normally applied to providing the actual > arguments (corresponding to the definition's "formal parameters") when a > function is called - that's argument passing. > > regards > Steve Thanks Steve, great post!

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Parse or Pass?
by frenchy64 Sept. 4, 2007

Sept. 4, 2007

I'm very confused...I want to describe passing variables to functions and I've seen these two words used in very similar contexts. Is there a difference between them?

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Re: problem with TreeView + ListStore
by Ali Sept. 4, 2007

Sept. 4, 2007

On Sep 4, 10:43 am, Guillermo Heizenreder <ghe...(a)gmail.com> wrote: > Hi list > I'm developing a application for learn pygkt, and I need to know when a > user selected or clicked one determinate row of my TreeView for shot > another signal . Hi, Well, ignoring the rest of the post, I can tell you that the usual way of doing this is to connect the changed signal of the treeview's selection. This explains it better than I would: http://faq.pygtk.org/index.py?req=show&file=faq13.011.htp Now to complete your actual use case: def on_selection_changed(selection, *args): model, paths = selection.get_selected_rows() if paths: hbox.show() treeView = gtk.TreeView() selection = self.treeView.get_selection() selection.connect('changed', on_selection_changed) There are some situations where you may want to actually connect the mouse click event, and we can discuss them further if you require. I should of course mention kiwi.ui.objectlist.ObjectList. It is an easier to use abstraction over TreeView, and has helped me in every situation where I would use a TreeView. Ali > Study the tutorial [1] I began to see the explanation that I see in the > chapter 14.7. TreeView Signal and found one in particular > "select-cursor-row", but I don't understood how implementing. > > Something like that. > if user_selected_row: > self.hbox_118.show() > print "YES" > > NOTE: self.hbox_118 = wTree.get_widget("hbox118") > > Thank and Regard > > [1]http://www.pygtk.org/pygtk2tutorial/sec-TreeViewSignals.html > > P/D: my English it to bad, I'm a novice. > -- > Heizenreder Guillermohttp://code.google.com/u/gheize/

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Re: So what exactly is a complex number?
by Roy Smith Sept. 4, 2007

Sept. 4, 2007

In article <mailman.8.1188882659.2658.python-list(a)python.org>, Steve Holden <steve(a)holdenweb.com> wrote: > Roy Smith wrote: > > Boris Borcic <bborcic(a)gmail.com> wrote: > >> Complex numbers are like a subclass of real numbers > > > > I wouldn't use the term "subclass". It certainly doesn't apply in the same > > sense it applies in OOPLs. For example, you can't say, "All complex > > numbers are real numbers". In fact, just the opposite. > > > > But, it's equally wrong to say, "real numbers are a subclass of complex > > numbers", at least not if you believe in LSP > > (http://en.wikipedia.org/wiki/Liskov_substitution_principle). For example, > > it is true that you can take the square root of all complex numbers. It is > > not, however, true that you can take square root of all real numbers. > > > That's not true. I suspect what you are attempting to say is that the > complex numbers are closed with respect to the square root operation, > but the reals aren't. Yes, that's what I was trying to say. > I don't think "subclass" has a generally defined meaning in mathematics That may be true, but this is a programming newsgroup, so I was using a programming sort of definition.

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Re: TypeError: 'module object is not callable'
by cjt22＠bath.ac.uk Sept. 4, 2007

Sept. 4, 2007

On Sep 4, 11:24 am, "Amit Khemka" <khemkaa...(a)gmail.com> wrote: > On 9/4/07, Chris.T...(a)jet.uk <Chris.T...(a)jet.uk> wrote: > > > Thanks guys. Changing to how Python does things has a lot of geting > > used to! > > Do any of you have any ideas on the best way to do the following > > problem: > > > Each loop I perform, I get a new list of Strings. > > I then want to print these lists as columns adjacent to each other > > starting with the first > > created list in the first column and last created list in the final > > column. > > > If you need any more information, just let me know! > > Cheers > > If I understand correctly what you may want is: > > >>> l = ['1', '2', '3', '4'] > > you can do: > > >>> print "\t".join(l) # lookup join method in stringmodule, > > assuming "\t" as the delimiter > > or, > > >>> for i in l: > > .... print i, '\t' , # note the trailing "," > > If this isnotwhat you want, post an example. > > Btw, Please post new issues in a separate thread. > > Cheers, > -- > ---- > Amit Khemka > website:www.onyomo.com > wap-site:www.owap.in I think that is very similar to what I want to do. Say I had lists a = ["1" , "2", "3"] b = ["4", "5", "6"] c = ["7", "8", "9"] Stored in another list d = [a,b,c] I want the printed output from d to be of the form: 1 4 7 2 5 8 3 6 9 >From what I am aware, there is no table module to do this. The '\t' operator looks like it can allow this, I am playing with it at the moment, although going for my lunch break now!

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Re: OT: pronounciation [was: list index()]
by Paddy Sept. 4, 2007

Sept. 4, 2007

On Aug 31, 11:19 am, Tim Golden <m...(a)timgolden.me.uk> wrote: > Tim Golden wrote: > > Erik Max Francis wrote: > >> Paddy wrote: > > >>> I say the 'oll' in troll like the 'ol' in frolic, and pronounce roll > >>> and role similarly. > > >>> My accent is probably from the East Midlands of the UK, but is not > >>> pronounced. > >> _Troll_ and _frolic_ aren't pronounced with the same "o" sound in any > >> accent I've ever heard of. Which you pronounce _boat_ and _bot_ the > >> same way, too? > > > [Amusingly contemplating a trolling war about the pronunciation of "troll"] > > > Well they sound the same in my more-or-less South London accent. > > I can't write those funny phonetic symbols (and I hate to > > imagine the Unicode encoding hoops I'd have to jump through > > to make them readable anyway) but both "o"s sound short to me. > > Like "bot" rather than "boat" using your example. > > Since we're talking... I'm still a little startled when I listen > to some of the excellent webcasts that are being produced these > days (showmedo.com and friends) and hear American voices pronounce > Python... well, the way they do, with the stress and something of a > drawl on the second syllable. I'm sure it's just as amusing the other > way round: we pronounce it with the stress on the first syllable and > the characteristic short vowel sound in the second. > (Something like: Pie'thun). > > TJG The only true way of pronouncing Python (the computing language), is the way it is done at the beginning of Monty Pythons Flying Circus of course :-) Your right, the American way does make me pause. - Paddy.

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Re: Applying transformation matrix to 3D vertex coordinates
by PhilC Sept. 4, 2007

Sept. 4, 2007

On Mon, 03 Sep 2007 23:24:42 -0500, Robert Kern <robert.kern(a)gmail.com> wrote: >transpose() ahh yes I can see where that would work. Just tried it in the above and I do get a last line of ones. OK onward and upward :) Many thanks Robert.

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[pygtk] problem with TreeView + ListStore
by Guillermo Heizenreder Sept. 4, 2007

Sept. 4, 2007

Hi list I'm developing a application for learn pygkt, and I need to know when a user selected or clicked one determinate row of my TreeView for shot another signal . Study the tutorial [1] I began to see the explanation that I see in the chapter 14.7. TreeView Signal and found one in particular "select-cursor-row", but I don't understood how implementing. Something like that. if user_selected_row: self.hbox_118.show() print "YES" NOTE: self.hbox_118 = wTree.get_widget("hbox118") Thank and Regard [1] http://www.pygtk.org/pygtk2tutorial/sec-TreeViewSignals.html P/D: my English it to bad, I'm a novice. -- Heizenreder Guillermo http://code.google.com/u/gheize/

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pickle error/instancemethod
by Gregor Kling Sept. 4, 2007

Sept. 4, 2007

Hello, I have some of these nefarious pickle errors I do not understand, maybe some of you have a clue. This is what I get (nd is the object which I want to pickle [cPickle.dumps(nd,2)], with the printout of nd.__dict__): ERROR Error: Can't pickle <type 'instancemethod'>: attribute lookup __builtin__.instancemethod failed, nd: {'dvzLogger': <dvzrv.DVZlogging.DVZlogger.DVZlogger object at 0x8b7 6bac>, '_DVZnetzDataBase__netzentries': [<dvzrv.db.containers.DVZnetzData.DVZnetzDataEntry object a t 0x8a8e08c>], '_DVZnetzDataBase__option_fqdn_alias': set(['a.b.c']), '_DVZnetzDataBase__admins': set([]), '_DVZnetzDataBase__aliasentries': []} I follow the hints on http://docs.python.org/lib/node318.html, so I do not understand the source of the problem. I do not try to pickle an instancemethod directly. The dict does apparently contains only top level tuples, lists, sets, and dictionaries, classes/instances. So if more Data is needed to analyse the problem - demand. gfk -- gfk

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py3k - format specifier for strings
by Carl Trachte Sept. 4, 2007

Sept. 4, 2007

Hello. Python 3.0.a1 has been released. I'm trying to get the hang of the new string formatting in the form: >>> a = "{0}".format(5.66) >>> a '5.66' There are more options in PEP 3101 (fill, alignment, etc.), but I'm having trouble implementing them. The doc has not yet been written. I haven't consulted the source code yet. Any help in the way of examples would be appreciated. Carl T.

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