Mailman 3 September 1997 - Pythonmac-SIG

Graphing capablility in Mac Python
by Anthony M. Ingraldi Aug. 23, 1998

Aug. 23, 1998

Hello, Is there a module available that will provide routines for creating simple line graphs and scatter plots? I was thinking of using AppleEvents to send data to KaleidaGraph or some other package but that seems sluggish. Another alternative would be to use a Canvas widget from Tk. I would prefer to use a module designed specifically for plotting rather than writing one via Tkinter. -- Tony Ingraldi | e-mail: A.M.INGRALDI(a)LaRC.NASA.GOV NASA Langley Research Center | Mail Stop 267 | Phone : (757) 864-3039 Hampton, VA 23681-0001 | Fax : (757) 864-7892 _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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Re: [PYTHONMAC-SIG] Show/Hide Window?
by Jack Jansen Sept. 30, 1997

Sept. 30, 1997

> MacPython just laughs at me when I try to invoke Win.ShowWindow. Python turns the procedural interface of the toolbox into an OO interface as much as possible. So, you should say: >>> import Win >>> w = Win.NewWindow((100,100,200,200), "title", 0, 0, -1, 1, 0) >>> w.ShowWindow() and it all works fine. For most toolboxes, if the first argument of a routine is the "natural" type of the toolbox the routine will be turned into a method. There are some exceptions: Qd.SetPort(), for instance, since there are so many things that can be passed to it as an argument. > Well, I finally noticed that everything gets imported into the Framework > twice, e.g. Win, Windows and QD, QuickDraw. I even found them. Windows > and QuickDraw are .py files that seem to have only constants in them, and > QD and Win have the puzzle-piece icons that mean extensions to me. I guess > they have the executable code, but I have no idea how to find out what > routines are actually there. The long-named modules Window, QuickDraw, etc. have the symbolic constants, the short-named modules are indeed dynamically loaded C modules with the real interface. Use "dir(Win)" to find out which functions are defined in the Win module. Use "w = NewWindow(....); dir(w)" to find out which methods the Window objects support. Use "print Win.NewWindow.__doc__" to print the argument list and return values of the Python implementation of the method or function. Use these three snippets of information plus a Mac programmers manual plus a lot of creativity to find out how to use the routine. I agree that this is all very tricky, but documenting all the calls is beyond me. > > Here's another puzzlement: I can't find any code in the Framework that > either hides a window or disposes of it, yet the windows disappear when I > click the close box. When a Window object's reference count drops to zero the window is disposed, which removes it from the screen, hence the DisposeWindow call is also missing as it is implicit in Python. There is one situation where you have to be aware of this: when a reference to your window is tucked away somewhere (usually in a stacktrace in sys.last_exc and friends). Then you close your FrameWork object and the window doesn't go away. The workaround is to raise a dummy exception and catch it, to clear the stacktrace. -- Jack Jansen | ++++ stop the execution of Mumia Abu-Jamal ++++ Jack.Jansen(a)cwi.nl | ++++ if you agree copy these lines to your sig ++++ http://www.cwi.nl/~jack | see http://www.xs4all.nl/~tank/spg-l/sigaction.htm _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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Show/Hide Window?
by James B. Wilkinson Sept. 30, 1997

Sept. 30, 1997

MacPython just laughs at me when I try to invoke Win.ShowWindow. Win.NewWindow works fine, and both NewWindow and ShowWindow are in the Window Manager section of Inside Macintosh vol 1 (old), so I thought that Win gets me to the Window Manager part of the toolbox. Is this routine just not implemented in MacPython, or is it in some other toolbox set? Well, I finally noticed that everything gets imported into the Framework twice, e.g. Win, Windows and QD, QuickDraw. I even found them. Windows and QuickDraw are .py files that seem to have only constants in them, and QD and Win have the puzzle-piece icons that mean extensions to me. I guess they have the executable code, but I have no idea how to find out what routines are actually there. Here's another puzzlement: I can't find any code in the Framework that either hides a window or disposes of it, yet the windows disappear when I click the close box. When I try to trace it in the source, all I find is bookkeeping stuff like setting the parent to None and getting the parent to remove the window from its list of children. I can't see how any of that would make the window actually go away. In the programming I did in C I always had to be careful to do a DisposeWindow on any window I had done a NewWindow for so that all the memory was given back to the heap. Is that being taken care of under the table here somehow? What I'm trying to do is create windows that are not visible until a menu item is selected. Here's the code. Is this the right way to do what I'm after (modulo the ShowWindow problem)? It seems to work (again, modulo the ShowWindow problem). I got this by stealing from ped and hacking on it. class TAWindow(Window): def __init__(self, parent, width = 200, height = 100, name = 'TAWindow'): Window.__init__(self, parent) self.name = name r = windowbounds(width, height) w = Win.NewWindow(r, name, true, documentProc, -1, true, 0x55555555) # ^ # ^ # I want a false here so the window is not visible right away. self.wid = w Qd.SetPort(w) Qd.TextFont(4) Qd.TextSize(12) self.root = self.MakeTree() def MakeTree(self): #application-dependent hook routine return root def open(self): Qd.SetPort(self.wid) # Is this necessary here? #Win.ShowWindow(self.wid)# Why doesn't Python know about ShowWindow? self.do_postopen() Thanks much. ------------------------------------------------------------- Jimmy Wilkinson | Perfessor of Computer Science jimmy(a)cs.cofc.edu | The College of Charleston (803) 953-8160 | Charleston SC 29424 If there is one word to describe me, that word would have to be "profectionist". _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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Re: [PYTHONMAC-SIG] Mac CGI
by guzdial＠cc.gatech.edu Sept. 29, 1997

Sept. 29, 1997

Start the Python CGI applet *first*. The CGI Applet is written as an AppleEvent Server. It just stays open and processes the CGI requests as they come in. Quit the Applet from the menu when you're through with it. (I find that if you don't start the Applet first, you can still start it up from the URL reference, but the request will probably time out before everything is set up.) Mark At 10:06 AM 9/26/97, Thomas Tiemann wrote: >Hi Jack, > >thank's for your help with urlretrieve. > >Sorry, but I have next problem. Now I want to write a CGI-Script on Mac and >I follow the steps in the cgi.html. If I write a CGI-Script with >AppleScript so the Script don't quit, but the Programs (Applets create with >mkapplet) with Python don't stay open and Webstar can't execute the Program. > >Thomas > > > >_______________ >PYTHONMAC-SIG - SIG on Python for the Apple Macintosh > >send messages to: pythonmac-sig(a)python.org >administrivia to: pythonmac-sig-request(a)python.org >_______________ -------------------------- Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280 (404) 894-5618 : Fax (404) 894-0673 : guzdial(a)cc.gatech.edu http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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Mac CGI
by Thomas Tiemann Sept. 26, 1997

Sept. 26, 1997

Hi Jack, thank's for your help with urlretrieve. Sorry, but I have next problem. Now I want to write a CGI-Script on Mac and I follow the steps in the cgi.html. If I write a CGI-Script with AppleScript so the Script don't quit, but the Programs (Applets create with mkapplet) with Python don't stay open and Webstar can't execute the Program. Thomas _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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Re: [PYTHONMAC-SIG] urllib
by Jack Jansen Sept. 24, 1997

Sept. 24, 1997

> Hi, > > i have a little problem. Is it possible to get with urllib.urlretrieve(url) > an image File. The file is fetched and saved in text-mode in stead of binary mode. Edit urllib.py, look for all makefile() and open() calls and give them flag 'rb' or 'wb'. This isn't completely correct either, since text files arrive on your mac with the end-of-line convention of the remote system, but there's little to be done about it. At least your binary files will be ok. -- Jack Jansen | ++++ stop the execution of Mumia Abu-Jamal ++++ Jack.Jansen(a)cwi.nl | ++++ if you agree copy these lines to your sig ++++ http://www.cwi.nl/~jack | see http://www.xs4all.nl/~tank/spg-l/sigaction.htm _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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urllib
by Thomas Tiemann Sept. 24, 1997

Sept. 24, 1997

Hi, i have a little problem. Is it possible to get with urllib.urlretrieve(url) an image File. I write the following code on Macintosh: import urllib : url = 'http ://192.0.1.23/tommy/' geturl = urllib.urlopen(url) : furl = findImagePath() iurl = url + furl # ok,iurl = http ://192.0.1.23/tommy/images/family.gif # but : getfile = urllib.urlretrieve(iurl) # the tmp-file is not correct, it can't read form Photoshop or other programs. I thnik the file was transfers as text-file and not as binary-file. What is the answer? Thomas _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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Re: [PYTHONMAC-SIG] Changes in 'Programming Python' demos? (fwd)
by wtbridgman＠radix.net Sept. 22, 1997

Sept. 22, 1997

Mark & Jack & others who might be interested: Mark: Thanks for the location. I will check it out. As for my original inquiry, late last night after sending out the inquiry and applying Jack's fix to my sys.path problem, I went back into the programs. This time when they failed, I took a close look in the text and lo' and behold, they were different. Usually, the electronic demos are more up-to-date than the text (more time for printing vs. time for cutting CDs?). However, I made the changes that appeared in the text and now FormGUI.py seems to work fine. I looked in GUImixin.py and noticed the call to ScrolledText is also different. I'll be trying out that fix this evening. I've gotta learn to pay attention... Thanks, Tom Tom Bridgman, Ph.D. wtbridgman(a)radix.net Physics & Astronomy _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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Network/System admin on Mac using Python
by Joe Van Andel Sept. 22, 1997

Sept. 22, 1997

Has anyone done any system admin scripts using Python? I'm looking for scripts that would aid in maintaining a group of Macs in a student lab, i.e: Software distribution/updates Cleaning out student folders Checking versions on software Thanks much. Joe VanAndel Internet: vanandel(a)ucar.edu National Center for http://www.atd.ucar.edu/~vanandel/home.html Atmospheric Research _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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Re: [PYTHONMAC-SIG] Changes in 'Programming Python' demos? (fwd)
by lutz＠rmi.net Sept. 22, 1997

Sept. 22, 1997

Hello, Your mail abut changes in some of the GUI examples in Programming Python was forwarded my way. There were indeed some incompatible Tkinter changes in Python 1.4. A listing of all known example updates is available on the web, at "http://rmi.net/~lutz/progdiff.html". Alternatively, to get a tar file with the updated examples (4 files), go to "http://rmi.net/~lutz/progdiff.tar", fetch the file, untar on your machine, and copy the 4 files to the book examples directory. Detailed descriptions of these and other book updates appear on the book's errata page, at: "http://rmi.net/~lutz/errata.html". If you have trouble accessing any of these URLs, send me an email. These are all the result of changes to the Tkinter module in 1.4, which were minor, but enough to break these examples; I doubt it's an issue with the Mac platform itself. Mark Lutz > ---------- Forwarded message ---------- > Date: Sat, 20 Sep 1997 18:48:10 -0400 > From: "W.T. Bridgman" <wtbridgman(a)radix.net> > To: pythonmac-sig(a)python.org > Subject: [PYTHONMAC-SIG] Changes in 'Programming Python' demos? > > As I've begun building my background in Python, I've been working with some > of the demos (particularly the GUIs) in Mark Lutz's "Programming Python". > I've encountered some problems running some of the demos from the CD-ROM. > > One problem is the call to ScrolledText in guimixin.py. More recently, > I've encountered a problem using formgui.py & formtest.py. > > Since I know there were some changes in Python from the 1.2-1.3 release to > the 1.4 version I'm using on a Mac, I'm not sure if the problem is > Mac-specific or due to changes in Python. > > If it's the latter, is there a location listing the changes required to get > these codes running under Python 1.4? > > Thanks, > Tom > > Tom Bridgman, Ph.D. wtbridgman(a)radix.net > Physics & Astronomy "Just say NO to > Microsoft." _______________ PYTHONMAC-SIG - SIG on Python for the Apple Macintosh send messages to: pythonmac-sig(a)python.org administrivia to: pythonmac-sig-request(a)python.org _______________

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