Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #108960
| Path | csiph.com!feeder.erje.net!2.eu.feeder.erje.net!newsfeed0.kamp.net!newsfeed.kamp.net!fu-berlin.de!uni-berlin.de!not-for-mail |
|---|---|
| From | Michael Torrie <torriem@gmail.com> |
| Newsgroups | comp.lang.python |
| Subject | Re: Image loading problem |
| Date | Sun, 22 May 2016 13:37:55 -0600 |
| Lines | 18 |
| Message-ID | <mailman.7.1463945887.20402.python-list@python.org> (permalink) |
| References | <743e5fbe-3a6c-49ea-ac5e-9bc055f652b5@googlegroups.com> <nhq3sl$hv8$1@ger.gmane.org> <1463860505.689253.614738601.76B18B37@webmail.messagingengine.com> <9341584a-bbdb-c9c8-2cf2-d631671631d3@gmail.com> |
| Mime-Version | 1.0 |
| Content-Type | text/plain; charset=windows-1252 |
| Content-Transfer-Encoding | 7bit |
| X-Trace | news.uni-berlin.de 9y1IZ4+CG20SMVKLonWCswfcofvGIGZXclrhWqEjwqvA== |
| Return-Path | <torriem+gmail@torriefamily.org> |
| X-Original-To | python-list@python.org |
| Delivered-To | python-list@mail.python.org |
| X-Spam-Status | OK 0.003 |
| X-Spam-Evidence | '*H*': 0.99; '*S*': 0.00; 'essentially': 0.04; '21,': 0.07; 'counting': 0.07; 'wrapped': 0.07; 'tcl/tk': 0.09; 'python': 0.10; 'python.': 0.11; 'from:addr:torriem': 0.16; 'from:name:michael torrie': 0.16; 'means.': 0.16; 'mismatch': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'wrappers': 0.16; 'wrote:': 0.16; 'odd': 0.18; 'prevent': 0.20; 'bug?': 0.22; 'subject:problem': 0.22; 'sat,': 0.23; 'header:In-Reply-To:1': 0.24; "i've": 0.25; 'header:User-Agent:1': 0.26; 'object,': 0.27; 'correct': 0.28; 'objects': 0.29; "i'm": 0.30; 'run': 0.33; 'problem': 0.33; 'message-id:@gmail.com': 0.34; 'languages': 0.34; 'could': 0.35; 'c++': 0.35; 'instance': 0.35; 'label': 0.35; "isn't": 0.35; 'but': 0.36; 'to:addr:python-list': 0.36; 'pm,': 0.36; 'subject:: ': 0.37; 'two': 0.37; 'being': 0.37; 'received:org': 0.37; 'why': 0.39; 'sure': 0.39; 'received:192': 0.39; 'to:addr:python.org': 0.40; 'your': 0.60; 'charset:windows-1252': 0.62; 'different': 0.63; 'between': 0.65; 'counting.': 0.84; 'otten': 0.84 |
| X-Virus-Scanned | amavisd-new at torriefamily.org |
| User-Agent | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0 |
| In-Reply-To | <1463860505.689253.614738601.76B18B37@webmail.messagingengine.com> |
| X-BeenThere | python-list@python.org |
| X-Mailman-Version | 2.1.22 |
| Precedence | list |
| List-Id | General discussion list for the Python programming language <python-list.python.org> |
| List-Unsubscribe | <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe> |
| List-Archive | <http://mail.python.org/pipermail/python-list/> |
| List-Post | <mailto:python-list@python.org> |
| List-Help | <mailto:python-list-request@python.org?subject=help> |
| List-Subscribe | <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe> |
| X-Mailman-Original-Message-ID | <9341584a-bbdb-c9c8-2cf2-d631671631d3@gmail.com> |
| X-Mailman-Original-References | <743e5fbe-3a6c-49ea-ac5e-9bc055f652b5@googlegroups.com> <nhq3sl$hv8$1@ger.gmane.org> <1463860505.689253.614738601.76B18B37@webmail.messagingengine.com> |
| Xref | csiph.com comp.lang.python:108960 |
Show key headers only | View raw
On 05/21/2016 01:55 PM, Random832 wrote: > On Sat, May 21, 2016, at 12:54, Peter Otten wrote: >> It's not your fault, there's an odd quirk in the library: you have to >> keep a reference of the PhotoImage instance around to prevent the >> image from being garbage-collected. > > Just out of curiosity, why is this a "quirk" and not a bug? Why isn't > the reference held by the Label? The reference is indeed held by the label but the problem is the label is a Tcl/Tk object, thinly wrapped in Python. It's essentially an impedance mismatch between two different languages and object models that each do their own reference holding and counting. I've run into this issue with PySide also as one is instantiating C++ objects that do their own internal reference counting through the Python wrapper. I'm sure Python wrappers could try to correct for this somewhat, but it's not a trivial thing to solve by any means.
Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Image loading problem "sweating_ant@yahoo.com" <huey.y.jiang@gmail.com> - 2016-05-21 08:22 -0700
Re: Image loading problem Peter Otten <__peter__@web.de> - 2016-05-21 18:54 +0200
Re: Image loading problem Peter Pearson <pkpearson@nowhere.invalid> - 2016-05-21 17:10 +0000
Re: Image loading problem Gary Herron <gherron@digipen.edu> - 2016-05-21 10:16 -0700
Re: Image loading problem Terry Reedy <tjreedy@udel.edu> - 2016-05-21 15:23 -0400
Re: Image loading problem Random832 <random832@fastmail.com> - 2016-05-21 15:55 -0400
Re: Image loading problem huey.y.jiang@gmail.com - 2016-05-21 21:01 -0700
Re: Image loading problem Peter Otten <__peter__@web.de> - 2016-05-22 11:03 +0200
Re: Image loading problem Michael Torrie <torriem@gmail.com> - 2016-05-22 13:37 -0600
Re: Image loading problem Random832 <random832@fastmail.com> - 2016-05-22 16:19 -0400
Re: Image loading problem Christian Gollwitzer <auriocus@gmx.de> - 2016-05-22 22:57 +0200
csiph-web