🌐 Mailman 3 May 2009 - Pythonmac-SIG - python.org

Authentication via python?
by Benjamin Schollnick Aug. 21, 2009

Aug. 21, 2009

Folks, I¹m working on some time machine scripting... In a gist, there is a .Backup.log file that I want to access via readline & python.... >From the MOSX gui, it appears some of the files require root access (eg. Authentication dialog pops up). Now, I am using the applet maker to compile the python to a GUI stub, so I can¹t SUDO the python script... Is there some method that I can use to authenticate via the python script internally? I¹m in the middle of a google search on this, but I am having no luck at refining my search phrase currently (Macintosh python authenticate)... - Benjamin

3 5

Gtk issues
by M Tramp July 17, 2009

July 17, 2009

[A bit of a noob here, running Tiger on a Mac mini] Spent well over an hour last night with MacPorts, installing modules necessary to run gramps. The software needs several modules, particularly Gtk. For the past couple of weeks, I've tried several methods of installing Gtk, including Fink and trying to compile it myself, and while I get few/no errors, gramps each time burps on the line: import gtk and replies: "No module named gtk" The relevant batch of code ... >> try: import pygtk pygtk.require('2.0') except ImportError: pass import gtk from gtk import glade import gobject << I add the pygtk info because the error exception doesn't appear to check for much, so I'm wondering if that isn't a cause of the gtk problem. If I type: port installed gtk2 I get: gtk2 @2.16.1_4+darwin_8+x11 (active) If I type: port installed py25-gtk I get: py25-gtk @2.14.1_0 (active) My hunch is that this is a sys.path problem. But if so, I don't know what file to look for so that I can add the path to sys.path. There are several files with "gtk" in the name on my hard drive, "_gtk.so"? mt

4 5

question about garbage collection with NSApplication.run()
by Bill Janssen June 1, 2009

June 1, 2009

I'm writing a Python program that has a main that looks like this: application = NSApplication.sharedApplication() # set up handler for network change notification SCDynamicStoreSetNotificationKeys(DYNSTORE, None, [NETWORK_KEY,]) # Get a CFRunLoopSource for our store session and add it to the application's runloop: CFRunLoopAddSource( NSRunLoop.currentRunLoop().getCFRunLoop(), SCDynamicStoreCreateRunLoopSource(None, DYNSTORE, 0), kCFRunLoopCommonModes ) # add a timer for application scan events timer = NSTimer.scheduledTimerWithTimeInterval_target_selector_userInfo_repeats_( periodicity, scanner, objc.selector(scanner.scan, signature="v@:"), None, True) # using an NSRunLoop avoids Activity Monitor complaining about "not responding" application.run() Do I need to do anything about NSAutoreleasePools? My understanding is that this is single-threaded, and that NSApplication.run will handle periodic drainage of the default main thread release pool. Bill

2 2

where do I store my Python programs
by beegee beegee June 1, 2009

June 1, 2009

Hi All, I have a mac mini mac os 10.4.11. I also have aquamac for an editor. I have some simple programs stored in text files. and I try to run them using aquamac, but I get the following error message steps taken: launch aquamacs File -> new buffer in new window File ->new buffer in mode python Python-> start interpreter >>> python first.py File "<stdin>", line 1 python first.py ^ SyntaxError: invalid syntax >>> I would like to know if this is a case of files not being seen by the python interpreter or what could be done Regards

3 3

Can't get ASDictionary to work (py2app problems?)
by Nicholas Riley May 31, 2009

May 31, 2009

Hi, I'm trying to use appscript on my MacBook Pro running OS X 10.5.7 and the stock Apple Python. It's never had appscript installed before. However, I can't get the binary ASDictionary I downloaded to run: Traceback (most recent call last): File "/Developer/Applications/appscript/ASDictionary.app/Contents/Resources/__boot__.py", line 31, in <module> _run('ASDictionary.py') File "/Developer/Applications/appscript/ASDictionary.app/Contents/Resources/__boot__.py", line 28, in _run execfile(path, globals(), globals()) File "/Developer/Applications/appscript/ASDictionary.app/Contents/Resources/ASDictionary.py", line 17, in <module> import osax, appscript, mactypes File "build/bdist.macosx-10.3-i386/egg/osax.py", line 38, in <module> File "build/bdist.macosx-10.3-i386/egg/aem/aemsend.py", line 82, in send aem.aemsend.EventError: Command failed: Application could not handle this command. (-1708) 2009-05-31 15:42:43.946 ASDictionary[4551:10b] ASDictionary Error 2009-05-31 15:42:43.948 ASDictionary[4551:10b] ASDictionary Error An unexpected error has occurred during execution of the main script EventError: Command failed: Application could not handle this command. (-1708) So I tried building newer versions of everything, which helped in the past. I did run into a problem with modulegraph and newer versions of setuptools but that was easily fixed. Now I seem to be having issues with py2app. First, if I try to use the bundled PyObjC, py2app doesn't pick it up, so I get an error trying to import 'objc'. Next, I tried installing the current PyObjC, but now I get a truly weird error running the built ASDictionary: Traceback (most recent call last): File "/Users/nicholas/src/ASDictionary/src/dist/ASDictionary.app/Contents/Resources/__boot__.py", line 31, in <module> _run('ASDictionary.py') File "/Users/nicholas/src/ASDictionary/src/dist/ASDictionary.app/Contents/Resources/__boot__.py", line 28, in _run execfile(path, globals(), globals()) File "/Users/nicholas/src/ASDictionary/src/dist/ASDictionary.app/Contents/Resources/ASDictionary.py", line 11, in <module> import objc File "objc/__init__.pyc", line 22, in <module> File "objc/__init__.pyc", line 19, in _update File "objc/_objc.pyc", line 18, in <module> File "objc/_objc.pyc", line 15, in __load ImportError: '/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-dynload/objc/_objc.so' not found 2009-05-31 15:47:49.610 ASDictionary[4560:10b] ASDictionary Error 2009-05-31 15:47:49.612 ASDictionary[4560:10b] ASDictionary Error An unexpected error has occurred during execution of the main script ImportError: '/System/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-dynload/objc/_objc.so' not found Why is it trying to look for _objc.so *there*? It's actually in /Library/Python/2.5/site-packages/pyobjc_core-2.2b2-py2.5-macosx-10.5-i386.egg/objc/_objc.so. If I build ASDictionary with py2app -A, I'm back to the old error about not being able to import objc: Traceback (most recent call last): File "/Users/nicholas/src/ASDictionary/src/dist/ASDictionary.app/Contents/Resources/__boot__.py", line 58, in <module> _run(('\x00\x00\x00\x00\x01(\x00\x02\x00\x00\x04Babs\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc1V\xc6\x82H+\x00\x00\x01-\xf1\xbf\x0fASDictionary.py\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01-\xf2\x03\xc6HIk\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00I \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x10\x00\x08\x00\x00\xc1W\x0c\xd2\x00\x00\x00\x11\x00\x08\x00\x00\xc6H\x8f\xbb\x00\x00\x00\x0e\x00 \x00\x0f\x00A\x00S\x00D\x00i\x00c\x00t\x00i\x00o\x00n\x00a\x00r\x00y\x00.\x00p\x00y\x00\x0f\x00\n\x00\x04\x00B\x00a\x00b\x00s\x00\x12\x003Users/nicholas/src/ASDictionary/src/ASDictionary.py\x00\x00\x13\x00\x01/\x00\x00\x15\x00\x02\x00\x0f\xff\xff\x00\x00', '/Users/nicholas/src/ASDictionary/src/ASDictionary.py')) File "/Users/nicholas/src/ASDictionary/src/dist/ASDictionary.app/Contents/Resources/__boot__.py", line 54, in _run execfile(path, globals(), globals()) File "/Users/nicholas/src/ASDictionary/src/ASDictionary.py", line 11, in <module> import objc ImportError: No module named objc 2009-05-31 15:49:24.391 ASDictionary[4605:10b] ASDictionary Error 2009-05-31 15:49:24.394 ASDictionary[4605:10b] ASDictionary Error An unexpected error has occurred during execution of the main script ImportError: No module named objc despite the fact that there is not one but *two* copies of PyObjC installed. (Everything works fine if I just 'import objc' from a script, of course.) Help? I just wanted to write a quick script to tag some PDFs and I'm now over two hours into this... it's almost driving me to AppleScript! Thanks, -- Nicholas Riley <njriley(a)uiuc.edu>

1 0

Whats the invalid syntax about
by beegee beegee May 31, 2009

May 31, 2009

Hello, I have a mac mini mac os 10.4.11 aquamacs 22.3.1. I wrote this program (please see below) after i got a python prompt (this was after starting the interpreter in aquamacs) please suggest what could have gone wrong here why am i getting a syntax error some_list = [3,6,2,5] i=1 while i < 3: print some_list[i], ";" i=i+1 print some_list[3] >>> File "<stdin>", line 4 print some_list[3] ^ SyntaxError: invalid syntax >>>

2 1

crankd for monitoring OS X
by Bill Janssen May 31, 2009

May 31, 2009

I ran across this project yesterday, and thought I'd point it out to others: http://code.google.com/p/pymacadmin/ "A collection of Python utilities for Mac OS X system administration." In particular, check out "crankd", a Python program for monitoring various kinds of OS X events. Bill

1 0

py2app and OpenGL, "No module named util" in ctypes
by Tom Haynes May 28, 2009

May 28, 2009

I'm trying to use py2app to package an OpenGL app, so first I tried to build the example here http://svn.pythonmac.org/py2app/py2app/trunk/examples/PyOpenGL/ and I get the error: > File "/opt/local/lib/python2.5/site-packages/PyOpenGL-3.0.0c1-py2.5.egg/OpenGL/p latform/darwin.py", line 24, in <module> > import ctypes, ctypes.util >ImportError: No module named util >2009-05-28 13:55:06.819 lesson5[19965:10b] lesson5 Error >2009-05-28 13:55:06.821 lesson5[19965:10b] lesson5 Error >An unexpected error has occurred during execution of the main script >ImportError: No module named util But when I open up my python interactive interpreter and "import ctypes.util", it works fine (using lesson5.app/Contents/MacOS/python, too). Thanks for the help. -tom

1 0

Re: [Pythonmac-SIG] Chinese glyphs in Python 3
by Ronald Oussoren May 27, 2009

May 27, 2009

--===============1820434273== Content-type: multipart/signed; boundary=Apple-Mail-82-903528184; micalg=sha1; protocol="application/pkcs7-signature" --Apple-Mail-82-903528184 Content-Type: multipart/alternative; boundary=Apple-Mail-81-903528086 --Apple-Mail-81-903528086 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit I've found the source of this bug: Tcl/Tk's rendering of Unicode data is broken on OSX. Luckily this is fixed on Tcl/Tk 8.5, but that doesn't help you very much because the Python installers all link to the (system install of) Tcl/Tk 8.4 and that version is not binary compatible with the later version. Which brings the question: is there anyone on the list that would like to look into providing two copies of Tkinter in the binary installers on OSX? This would preferably install both copies of the tkinter extension and magicly select the right copy to use at runtime. That way Tkinter, and more importantly IDLE, would work out of the box and anyone that would need a better version of Tk can use that by installing Tk themself. I don't have time to work on this myself though. Ronald On 26 May, 2009, at 8:56, Ronald Oussoren wrote: > I've filed this as issue 6109 at the python bugtracker (http://bugs.python.org/issue6109 > ). I haven't uploaded your example file yet, would you mind if I did > upload the file to the tracker? > > Ronald > > On 26 May, 2009, at 2:27, John Newman wrote: > >> Sorry, pasting the Chinese text into email wasn't very clever. I've >> attached a txt file with the Chinese saved as utf-8. >> >> John >> >> >> -----Original Message----- >> From: Ronald Oussoren [mailto:ronaldoussoren@mac.com] >> Sent: Mon 5/25/2009 11:30 AM >> To: John Newman >> Cc: pythonmac-sig(a)python.org >> Subject: Re: [Pythonmac-SIG] Chinese glyphs in Python 3 >> >> >> On 25 May, 2009, at 16:36, John Newman wrote: >> >> >> Ronald >> >> See the attachment, where most of the Chinese glyphs are >> correctly displayed, but not all. >> >> When I copy and paste these glyphs from Python 3 to JEdit, >> all the glyphs display correctly, so the correct unicode code >> points are there underlying the glyphs. I've tried most of the >> fonts available to me in the GUI and I still can't get them all to >> display properly. >> >> >> Could you post the actual text-file as well? >> >> Ronald >> >> >> John >> >> >> -----Original Message----- >> From: Ronald Oussoren [mailto:ronaldoussoren@mac.com] >> Sent: Sun 5/24/2009 11:48 PM >> To: John Newman >> Cc: pythonmac-sig(a)python.org >> Subject: Re: [Pythonmac-SIG] Chinese glyphs in Python 3 >> >> John, >> >> On 25 May, 2009, at 1:34, John Newman wrote: >> >> >> Apologies if my question is ridiculously trivial - >> I'm not a developer, just a relatively new user of Python 3.0.1 on >> Mac OS 10.4.11. and I have only just now joined the list. >> >> When I read in a Chinese text in the Python 3 IDLE >> GUI on Windows XP I see all the Chinese glyphs displayed properly. >> On my Mac, about one third of the Chinese characters are not >> displayed correctly (just empty or black boxes in place of glyphs). >> It doesn't matter whether I save/open texts as utf-8, utf-16, etc. >> [The glyphs display fine in TextEdit, JEdit, Word etc.] And the >> same kind of problem occurs when I scroll through the list of font >> names in Preferences in IDLE: the names in Chinese glyphs have a >> number of white or black boxes instead of the glyphs. >> >> I just assume that this has something to do with >> the locale settings in IDLE? On my machine: >> >> >>> locale.getpreferredencoding() >> 'mac-roman' >> >>> locale.getlocale() >> (None, None) >> >> In my Windows XP, the locale settings are (English, >> '1252') and I presume that this difference is relevant to >> understanding the different effects I get opening Chinese texts in >> my Windows XP and my Mac. 'mac-roman' would not be my natural >> choice of encoding if I am looking at Chinese text! I need an >> encoding which can handle the range of glyphs we find in GB 18030, >> say. >> >> Am I being naive in thinking that all I have to do >> in Python is somehow change the locale settings in some way which >> will display Chnese glyphs? I'm at a loss to know what I should do >> in order to display Chinese glyphs properly on the Mac. I tried >> experimenting with "setlocale" but couldn't make progress. >> >> Any suggestions would be very welcome. >> >> >> >> This might be a font issue, although the default font >> (Courier) seems to be capable of displaying unicode text and >> therefore saving as UTF-8 should work. Another possible souce for >> this problem is the GUI framework used by IDLE. >> >> Could you post an example of a file that shows the problem? >> >> Ronald >> >> >> >> >> >> <glyphs.jpg> >> >> >> >> >> >> <Chinese.txt> > > _______________________________________________ > Pythonmac-SIG maillist - Pythonmac-SIG(a)python.org > http://mail.python.org/mailman/listinfo/pythonmac-sig --Apple-Mail-81-903528086 Content-Type: text/html; charset=US-ASCII Content-Transfer-Encoding: quoted-printable <html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; = -webkit-line-break: after-white-space; "><div><br></div><div>I've found = the source of this bug: Tcl/Tk's rendering of Unicode data is broken on = OSX. Luckily this is fixed on Tcl/Tk 8.5, but that doesn't help you very = much because the Python installers all link to the (system install of) = Tcl/Tk 8.4 and that version is not binary compatible with the later = version.</div><div><br></div><div>Which brings the question: is there = anyone on the list that would like to look into providing two copies of = Tkinter in the binary installers on OSX? This would preferably install = both copies of the tkinter extension and magicly select the right copy = to use at runtime. That way Tkinter, and more importantly IDLE, would = work out of the box and anyone that would need a better version of Tk = can use that by installing Tk themself. =  </div><div><br></div><div>I don't have time to work on this myself = though.</div><div><br></div><div>Ronald</div><div><br></div><div><div>On = 26 May, 2009, at 8:56, Ronald Oussoren wrote:</div><br = class=3D"Apple-interchange-newline"><blockquote type=3D"cite"><div = style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; = -webkit-line-break: after-white-space; ">I've filed this as issue 6109 = at the python bugtracker (<a = href=3D"http://bugs.python.org/issue6109">http://bugs.python.org/issue6109= </a>). I haven't uploaded your example file yet, would you mind if I did = upload the file to the = tracker?<div><br></div><div>Ronald<br><div><br><div><div>On 26 May, = 2009, at 2:27, John Newman wrote:</div><br = class=3D"Apple-interchange-newline"><blockquote type=3D"cite"> <div> = <p><font size=3D"2">Sorry, = pasting the Chinese text into email wasn't very clever. I've attached a = txt file with the Chinese saved as utf-8.<br> <br> John<br> <br> <br> = -----Original Message-----<br> From: Ronald Oussoren [<a = href=3D"mailto:ronaldoussoren@mac.com">mailto:ronaldoussoren@mac.com</a>]<= br> Sent: Mon 5/25/2009 11:30 AM<br> To: John Newman<br> Cc: <a = href=3D"mailto:pythonmac-sig@python.org">pythonmac-sig(a)python.org</a><br> = Subject: Re: [Pythonmac-SIG] Chinese glyphs in Python 3<br> <br> <br> On = 25 May, 2009, at 16:36, John Newman wrote:<br> <br> <br> =         Ronald<br> =        <br> =         See the attachment, where = most of the Chinese glyphs are correctly displayed, but not all.<br> =        <br> =         When I copy and paste these = glyphs from Python 3 to JEdit, all the glyphs display correctly, so the = correct unicode code points are there underlying the glyphs. I've tried = most of the fonts available to me in the GUI and I still can't get them = all to display properly.<br> =        <br> <br> Could you post the = actual text-file as well?<br> <br> Ronald<br> <br> =        <br> =         John<br> =        <br> =        <br> =         -----Original = Message-----<br>         From: Ronald = Oussoren [<a = href=3D"mailto:ronaldoussoren@mac.com">mailto:ronaldoussoren@mac.com</a>]<= br>         Sent: Sun 5/24/2009 11:48 = PM<br>         To: John Newman<br> =         Cc: <a = href=3D"mailto:pythonmac-sig@python.org">pythonmac-sig(a)python.org</a><br> =         Subject: Re: [Pythonmac-SIG] = Chinese glyphs in Python 3<br> =        <br> =         John,<br> =        <br> =         On 25 May, 2009, at 1:34, = John Newman wrote:<br>        <br> =        <br> =         =         Apologies if my question is = ridiculously trivial - I'm not a developer, just a relatively new user = of Python 3.0.1 on Mac OS 10.4.11. and I have only just now joined the = list.<br>         =       <br> =         =         When I read in a Chinese text = in the Python 3 IDLE GUI on Windows XP I see all the Chinese glyphs = displayed properly. On my Mac, about one third of the Chinese characters = are not displayed correctly (just empty or black boxes in place of = glyphs). It doesn't matter whether I save/open texts as utf-8, utf-16, = etc. [The glyphs display fine in TextEdit, JEdit, Word etc.]  And = the same kind of problem occurs when I scroll through the list of font = names in Preferences in IDLE: the names in Chinese glyphs have a number = of white or black boxes instead of the glyphs.<br> =         =       <br> =         =         I just assume that this has = something to do with the locale settings in IDLE? On my machine:<br> =         =       <br> =         =         >>> = locale.getpreferredencoding()<br> =         =         'mac-roman'<br> =         =         >>> = locale.getlocale()<br>         =         (None, None)<br> =         =       <br> =         =         In my Windows XP, the locale = settings are (English, '1252') and I presume that this difference is = relevant to understanding the different effects I get opening Chinese = texts in my Windows XP and my Mac. 'mac-roman' would not be my natural = choice of encoding if I am looking at Chinese text! I need an encoding = which can handle the range of glyphs we find in GB 18030, say.<br> =         =       <br> =         =         Am I being naive in thinking = that all I have to do in Python is somehow change the locale settings in = some way which will display Chnese glyphs?  I'm at a loss to know = what I should do in order to display Chinese glyphs properly on the Mac. = I tried experimenting with "setlocale" but couldn't make progress.<br> =         =       <br> =         =         Any suggestions would be very = welcome.<br>         =       <br> =        <br> =        <br> =         This might be a font issue, = although the default font (Courier) seems to be capable of displaying = unicode text and therefore saving as UTF-8 should work.  Another = possible souce for this problem is the GUI framework used by IDLE.<br> =        <br> =          Could you post an = example of a file that shows the problem?<br> =        <br> =         Ronald<br> =        <br> =        <br> =        <br> =        <br> <br> =         <glyphs.jpg><br> <br> = <br> <br> <br> </font> </p> </div> = <span><Chinese.txt></span></blockquote></div><br></div></div></div>_= ______________________________________________<br>Pythonmac-SIG maillist =  -  <a = href=3D"mailto:Pythonmac-SIG@python.org">Pythonmac-SIG(a)python.org</a><br><= a = href=3D"http://mail.python.org/mailman/listinfo/pythonmac-sig">http://mail= .python.org/mailman/listinfo/pythonmac-sig</a><br></blockquote></div><br><= /body></html>= --Apple-Mail-81-903528086-- --Apple-Mail-82-903528184 Content-Disposition: attachment; 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Python Core Graphics Question
by Geert Dekkers May 27, 2009

May 27, 2009

Hi all Below is a piece of code that I found over in the quartz-dev list. I've been using this function unchanged in a batch processor, and it appears to leak memory quite substantially. So much so that my test machine (1Gb memory) , a mac mini, and my production xserve (2 Gb memory) both crashed using it. My dev machine, an imac (4Gb memory) slowed, but stayed up. I think I have the problem down to "croppedimg = srcimg.createWithImageInRect(cliprect)". If used with an image of suffient size, it quickly sucks up all available memory. Has anyone experienced similar problems using this method? Its Obj-C name is "CGContextCreateWithImageInRect". And I should think that one would only see something bad happening in some sort of batch processing. Incidentally, my workaround was to lower the size of the source image. But the process is still quite unstable. It brought down my xserve after processing 7000 of the 7600 odd items. I've pasted the original post below. And sorry for any cross - posting. Cheers, Geert ---------------------------------------------------------------------------------------------- Geert Dekkers Web Studio | 2e Keucheniusstraat 8HS 1051VR Amsterdam | +31(0)627224301 | http://nznl.net ---------------------------------------------------------------------------------------------- >> Thanks for you detailed reply Glen - much appreciated. >> You helped me to solve what i was trying to do by using >> CGImageCreateWithImageinRect as suggested. >> >> For anyone else interested here is some simple python code for >> making cropped thumbnails of any proportion and not loosing the >> aspect ratio of the original image. >> ...and its damn fast! >> >> ----------- #!/usr/bin/python >> >> from __future__ import division import CoreGraphics >> >> def resizeimage(srcimage,targetimage, tw, th): >> >> srcimg = >> CoreGraphics >> .CGImageImport >> (CoreGraphics.CGDataProviderCreateWithFilename(srcimage)) >> >> sw = srcimg.getWidth() >> sh = srcimg.getHeight() >> >> aspect = tw/th >> >> widthfactor = tw/sw >> heightfactor = th/sh >> >> if widthfactor < heightfactor: >> #src height stays the same >> #src width gets cropped >> cropwidth = sh * aspect >> x1 = ((sw-cropwidth)/2) >> y1 = 0 >> x2 = sw-((sw-cropwidth)) >> y2 = sh >> else: >> #src height gets cropped >> #src width stays the same >> cropheight = sw / aspect >> x1 = 0 >> y1 = ((sh-cropheight)/2) >> x2 = sw >> y2 = sh-((sh-cropheight)) >> >> cliprect = CoreGraphics.CGRectMake(x1, y1, x2, y2) >> croppedimg = srcimg.createWithImageInRect(cliprect) >> >> cs = CoreGraphics.CGColorSpaceCreateDeviceRGB() >> c = CoreGraphics.CGBitmapContextCreateWithColor(tw, th, cs, >> (0,0,0,0)) >> >> c.setInterpolationQuality(CoreGraphics.kCGInterpolationLow) >> newRect = CoreGraphics.CGRectMake(0, 0, tw, th) >> c.drawImage(newRect, croppedimg) >> c.writeToFile(targetimage, CoreGraphics.kCGImageFormatJPEG) >> >> resizeimage("/users/adam/Desktop/bootlogo4pa8.jpg", "/users/adam/ >> Desktop/aaaaa.jpg" , 80,80) >> >> >> >> >> >> >> >>> On Aug 12, 2008, at 3:41 AM, Glenn Cole wrote: >>> >>> Hi, Adam -- >>> >>> I'm no expert, but until others more knowledgeable respond, here's >>> my understanding. >>> >>> First, I suspect the fact that you're using Python won't matter at >>> all here. (It does in other circumstances, but I don't think so >>> here.) >>> >>> It sounds like you're looking for more support from Quartz for >>> your task than what's really there. In the end, I think it's going >>> to be more a choice of algorithm on your part. >>> >>> For example, given different aspect ratios, the new image could >>> either: >>> >>> 1. ignore the difference (i.e., the current behaviour) >>> 2. show the entire original image within the new target, >>> respecting the aspect ratio >>> 3. clip the original image to match the new aspect ratio >>> >>> For #2, you could shrink the target rect to match the aspect ratio >>> of the original image. >>> >>> For #3 (your goal), you could clip the original image to match the >>> target aspect ratio. However, page 250 of the outstanding >>> Programming With Quartz notes a few downsides to this, and >>> suggests using CGImageCreateWithImageInRect instead (first >>> available in Tiger) to define a "subimage" of the original image. >>> Again, though, you would need to determine yourself that the >>> subimage should ignore 100 pixels from the left and right sides of >>> the original image. >>> >>> At least, that's my take on things. We'll see what others say >>> (though they've tended to ignore Python questions in the past). >>> >>> Incidentally, the subject line says "Core Image resize question." >>> The code below has no reference to Core Image, and I'm pretty sure >>> that Core Image need not be involved in this task at all. (Perhaps >>> you mentioned Core Image because of the existence of its CICrop >>> filter, but I think that's not the best direction for the task at >>> hand.) >>> >>> --Glenn >>> >>> >>> On Aug 11, 2008, at 5:33 AM, Adam Jones wrote: >>> >>> Hi there i am wondering if someone can help me with this. Below is >>> the code i am using to resize and save a jpeg image. >>> >>> It works mint as but it obviously scales the image with no respect >>> for the aspect ratio. >>> >>> i want to be able to take an image and scale it proportionaly to a >>> square thumbnail. so for example a 800x600 image scaled to 80x80 >>> would need to loose 100pixels off the left and 100 pixels on the >>> right before scaling. >>> >>> Does any one know how to crop using python quartz or can i draw >>> the rec with the image off the canvas to achieve the same? >>> >>> Thanks Adam >>> >>> >>> ----------- #!/usr/bin/python >>> >>> import CoreGraphics >>> >>> def resizeimage(srcimage,targetimage, w, h): >>> >>> origImage = CoreGraphics .CGImageImport >>> (CoreGraphics.CGDataProviderCreateWithFilename(srcimage)) >>> >>> origwidth = origImage.getWidth() # not used yet but will be once i >>> work out how to crop >>> origheight = origImage.getHeight() # not used yet but will be once >>> i work out how to crop >>> >>> cs = CoreGraphics.CGColorSpaceCreateDeviceRGB() >>> c = CoreGraphics.CGBitmapContextCreateWithColor(w, h, cs, (0,0,0,0)) >>> >>> c.setInterpolationQuality(CoreGraphics.kCGInterpolationLow) >>> newRect = CoreGraphics.CGRectMake(0, 0, w, h) >>> c.drawImage(newRect, origImage) >>> c.writeToFile(targetimage, CoreGraphics.kCGImageFormatJPEG) >>> >>> >>> resizeimage(uploadedfile, "/svr/data/images/listings/%s/ >>> %s_160x90.jpg" % (str(listing_id), newimagename), 160,90) >>> >>> ------------- >>> >>> >>> _______________________________________________ Do not post admin >>> requests to the list. They will be ignored. Quartz-dev mailing >>> list (email@hidden) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/quartz-dev/email@hidden >>> >>> This email sent to email@hidden >>

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