Dialog boxes in curses
Hello. I've googled for hints but I didn't find anything, I hope it's not an RTFM question :^) I want to have dialog boxes (a message with Yes/No/Cancel options, possibly with keyboard accels) in python + curses. Does anyone have a pointer to docs about this? Thanks! -- F. Delente -- http://mail.python.org/mailman/listinfo/python-list
Re: Dialog boxes in curses
Thanks all for your suggestions, I'll look into them. See you. -- F. Delente -- http://mail.python.org/mailman/listinfo/python-list
error when printing a UTF-8 string (python 2.6.2)
Hello. I read a string from an utf-8 file: fichierLaTeX = codecs.open(sys.argv[1], "r", "utf-8") s = fichierLaTeX.read() fichierLaTeX.close() I can then print the string without error with 'print s'. Next I parse this string: def parser(s): i = 0 while i < len(s): if s[i:i+1] == '\\': i += 1 if s[i:i+1] == '\\': print "backslash" elif s[i:i+1] == '%': print "pourcentage" else: if estUnCaractere(s[i:i+1]): motcle = "" while estUnCaractere(s[i:i+1]): motcle += s[i:i+1] i += 1 print "mot-clé '"+motcle+"'" but when I run this code, I get this error: Traceback (most recent call last): File "./versOO.py", line 115, in parser(s) File "./versOO.py", line 105, in parser print "mot-clé '"+motcle+"'" UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 6: ordinal not in range(128) What must I do to solve this? Thanks! -- Fabrice DELENTE -- http://mail.python.org/mailman/listinfo/python-list
Re: error when printing a UTF-8 string (python 2.6.2)
> Change your string literals to unicode by adding the u-prefix and you should > be OK. Thanks, it solved the problem... for a while! I need now to know if s[i] gives the next byte or the next character, when I scan the string s. I've googled pages about python and unicode, but didn't find a solution to that. I scan the string read from the file char by char to construct s, but now get the same error when just trying 'print s'. Is there a way to tell python that all strings and characters are to be treated as UTF-8? I have LC_ALL=en_GB.utf-8 in my shell, but python does'nt seem to use this variable? Thanks! -- Fabrice DELENTE -- http://mail.python.org/mailman/listinfo/python-list
Re: error when printing a UTF-8 string (python 2.6.2)
Thanks for your insights. I have taken the easy way out, I read on a page that python 3 worked by default in UTF-8, so I downloaded and installed it. Apart from a few surprises (print is not a funtion, and rules about mixing spaces and tabs in indentation are much more strict, and I guess more is to come :^) everything now works transparently. Thanks again. -- Fabrice DELENTE -- http://mail.python.org/mailman/listinfo/python-list
[Python3] Reading a binary file and wrtiting the bytes verbatim in an utf-8 file
Hello. I have to read the contents of a binary file (a PNG file exactly), and dump it into an RTF file. The RTF-file has been opened with codecs.open in utf-8 mode. As I expected, the utf-8 decoder chokes on some combinations of bits; how can I tell python to dump the bytes as they are, without interpreting them? Thanks. -- Fabrice DELENTE -- http://mail.python.org/mailman/listinfo/python-list
Re: [Python3] Reading a binary file and wrtiting the bytes verbatim ?in an utf-8 file
Thanks, I'll try this. > I have no idea how you'd go about reading the contents of such a file > in a sensible way. The purpose is to embed PNG pictures in an RTF file that will be read by OpenOffice. It seems that OpenOffice reads RTF in 8-bit, so it should be ok. The RTF is produced from a TeX source file encoded in UTF-8, that's why I mix unicode and 8-bit. -- Fabrice DELENTE -- http://mail.python.org/mailman/listinfo/python-list
Re: [Python3] Reading a binary file and wrtiting the bytes verbatim?in an utf-8 file
> Another possibility is to open the file in binary mode and do the > encoding yourself when writing text. This might actually be a better > solution, since I'm not sure RTF uses utf-8 by default. Yes, thanks for this suggestion, it seems the best to me. Actually RTF is not UTF-8 encoded, it's 8-bit and maybe even ASCII only. Every unicode char has to be encoded as an escape sequence (\u2022 for example). Thanks again. -- Fabrice DELENTE -- http://mail.python.org/mailman/listinfo/python-list
Classes in a class: how to access variables from one in another
Hello. I have a class A that contains two classes B and C: class A: class B: self.x = 2 class C: Is there a way to access the x defined in B in class C? Thanks. -- F. Delente -- http://mail.python.org/mailman/listinfo/python-list
Re: Classes in a class: how to access variables from one in another
Neil Cerutti wrote: >> I have a class A that contains two classes B and C: >> >> class A: >> class B: >> self.x = 2 >> >> class C: I only wanted to show the structure of the code, not the actual instructions. > That's not valid Python code. Do you mean: > > Class A: > Class B: >x = 2 > Class A: > Class B: >def __init__(self): > self.x = 2 > Any of these, aslong as I can access x in C. By the way, is the first proposition (that is, x = 2, without the self.) valid? Is x a global variable then? Thanks. -- F. Delente -- http://mail.python.org/mailman/listinfo/python-list
Re: Classes in a class: how to access variables from one in another
Gary Herron wrote: > Well, your code still doesn't make sense, but the generic answers are: I'll clarify what I need then: I'm drawing Bézier curves. I draw them on a zone that is defined as a subclass of GtkDrawingArea. In a zone, I define a system of coordinates by 4 values: xmin, xmax, ymin, and ymax that define the viewing port. A curve is defined in this system of coordinates by a collection of points. So my way of coding it is the following: class zone(GtkDrawingArea): class systemOfCoordinates: self.xmin = -5 self.xmax = 5 self.ymin = -5 self.ymax = 5 class Curve: self.listOfPoints = () def draw(self): pass # for each point in self.listOfPoints: draw this point # then draw the Bézier curve passing through these points class Point: def __init__(self, x, y): (self.x, self.y) = (x, y) def draw(self): # ... code for drawing a dot in the system of coordinates... def __init__(self): # for the zone object self.coord = self.systemOfCoordinates() self.listOfCurves = ( self.Curve() ) def expose(self, widget, event): pass # for each curve of self.listOfCurves: draw it Now to actually draw the dot on the screen, I need to access coord.xmin, coord.xmax, coord.ymin and coord.ymax to Point.draw(). I could do this by passing a reference to Point.draw(), but I'd like to do this implicitely. I guess that in that case, xmin, xmax, ymin and ymax should be class variables of zone, right? > If *any* object, class or instance of a class (or module or whatever) > contains another, access is by chaining the dots. > OuterOb.InnerOb.attribute > > Hope that answers your question. This should help, I'll make some tests. Thanks. -- F. Delente -- http://mail.python.org/mailman/listinfo/python-list
Re: Classes in a class: how to access variables from one in another
Jean-Michel Pichavant wrote: > Always post working code, or at least something we can paste in the > python interpreter (even if it's buggy) Ok, noted. > class A: >class B: >x=2 >class C: >def __init__(self): >print A.B.x > > c = A.C() > > >2 Good, thanks. I've made further tests and here is what I have come to: class zoneDeDessin(gtk.DrawingArea): xmin = -5.5 xmax = 5.5 ymin = -5.5 ymax = 5.5 class Handle: def __init__(self, xEcran, yEcran): (self.xEcran, self.yEcran) = (xEcran, yEcran) (self.xRepere, self.yRepere) = (zoneDeDessin.XdeLEcranAuRepere(xEcran), zoneDeDessin.YdeLEcranAuRepere(yEcran)) def __init__(self): gtk.DrawingArea.__init__(self) (self.largeur, self.hauteur) = (0,0) def expose(self, widget, event): rect = self.get_allocation() (self.largeur, self.hauteur) = (rect.width, rect.height) def XdeLEcranAuRepere(self, x): return zoneDeDessin.xmin+x*(zoneDeDessin.xmax-zoneDeDessin.xmin)/float(self.largeur) def YdeLEcranAuRepere(self, y): return zoneDeDessin.ymax+y*(zoneDeDessin.ymin-zoneDeDessin.ymax)/float(self.hauteur) I have further code that should add a Handle when I double-click on the screen. However I get this error when executing: Traceback (most recent call last): File "./zoneDeDessin.py", line 161, in boutonRelache zoneDeDessin.Courbe.ajouterUnHandle(self.courbeCourante, event.x, event.y) File "./zoneDeDessin.py", line 36, in ajouterUnHandle self.listeDesPoints.append(zoneDeDessin.Handle(xEcran, yEcran)) File "./zoneDeDessin.py", line 22, in __init__ (self.xRepere, self.yRepere) = (zoneDeDessin.XdeLEcranAuRepere(xEcran), zoneDeDessin.YdeLEcranAuRepere(yEcran)) TypeError: unbound method XdeLEcranAuRepere() must be called with zoneDeDessin instance as first argument (got float instance instead) I understand the error (XdeLEcranAuRepere is an instance method, not a class method), but I don't see how to fix it, except by making largeur and hauteur class variables... Any hint? Thanks! -- F. Delente -- http://mail.python.org/mailman/listinfo/python-list
Re: Classes in a class: how to access variables from one in another
Christian Heimes wrote: > Don't nest classes. Just don't. This might be a valid and good approach > in some programming languages but it's not Pythonic. Your code can > easily be implemented without nested classes. I think you're right. It would have been more aesthetically pleasant to me (a Handle has only sense on a drawing zone), but if it's more complicated I'll avoid nested classes. -- F. Delente -- http://mail.python.org/mailman/listinfo/python-list
