this might help, I wrote it some time ago as a reminder to myself :)
http://python-
camelot.s3.amazonaws.com/gpl/release/pyqt/doc/advanced/development.html
On Friday, September 20, 2013 09:50:25 PM Chris O'Halloran wrote:
Hello all,
This question will hopefully be trivial but I seem to have a
Hello Phil,
could you possibly give some explanations for
The GIL is only released when it is known to be needed. PyQt4 always
released the GIL when calling Qt.
Thanks,
Erik
On Mon, May 6, 2013 at 4:49 PM, Phil Thompson
p...@riverbankcomputing.comwrote:
The first PyQt5 snapshots are now
overnight, but will take a couple of months.
Regards,
Erik
On Tue, Apr 16, 2013 at 5:36 PM, Sibylle Koczian nulla.epist...@web.dewrote:
Am 12.04.2013 12:03, schrieb Erik Janssens:
Hello,
Camelot 13.04.13 has been released.
Camelot provides components to build business applications
on top
Hello,
Camelot 13.04.13 has been released.
Camelot provides components to build business applications
on top SQLAlchemy and PyQt. For screenshots, see :
http://www.python-camelot.com/
An overview of the changes can be found here :
Hello,
would it be possible to include in the PyQt documentation's
objects.inv file references to all Qt classes wrapped by PyQt.
at the moment, it contains only a selection of wrapped classes,
and the PyQt specific classes.
there's only a few lines in the objects.inv file, such as :
what kind of changes to the thread support ??
do you have links to changesets ?
Thx,
Erik
On Tuesday, February 26, 2013 08:59:12 AM Phil Thompson wrote:
I plan to make the next releases fo SIP, PyQt and QScintilla in the next
few days. I've made some small changes to the thread support very
Here are some things regarding detecting and preventing
segfaults I've once written down for my own reference :
http://python-camelot.s3.amazonaws.com/gpl/release/pyqt/doc/advanced/debug.html
http://python-camelot.s3.amazonaws.com/gpl/release/pyqt/doc/advanced/development.html
I have not seen an
Hi Chris,
I'm not sure if this can be fixed, maybe you can ask this
on the Qt info mailing list. If it can be fixed, I'm interested
in the solution ;)
What happens is, when the TableWidget receives a click, it
creates an editor, but the editor has not yet received the
click. That is perfect
to Python 3.
Cheers,
Erik
On Sat, 2012-05-26 at 15:49 +0200, Sibylle Koczian wrote:
Am 22.05.2012 00:15, schrieb Erik Janssens:
you could give Camelot a try ...
http://www.python-camelot.com/
Is Camelot usable with Python 3? I can't find out for sure from the
website, but I suspect it's
you could give Camelot a try ...
http://www.python-camelot.com/
On Sat, May 19, 2012 at 4:16 AM, Wes Goodenough mob...@wrgoodenough.com wrote:
Hello. I'm learning PyQt for use with Designer for database applications.
I've been reading all the resources and tutorials, and I have a good amount
which version of PyQt are you using ?
When in older versions (I think something like 2 releases ago),
the garbage collection kicks in in a thread and it deletes
a QObject from another thread, this object was deleted
immediately, while in recent versions those are deleted later
on in the event
wrote:
On Sat, Apr 28, 2012 at 01:05:37PM +0200, Erik Janssens wrote:
which version of PyQt are you using ?
When in older versions (I think something like 2 releases ago),
the garbage collection kicks in in a thread and it deletes
a QObject from another thread, this object was deleted
Hi,
How are debug builds supposed to work under windows ?
I'm observing a segfault that I can only reproduce on
windows, and would like to create a stackstrace.
I've build Qt in debug mode. But when building sip
with --debug, it appears that the dll is named sip_d
instead of sip, making the
use in debug :(
Erik
On Sat, 2012-04-14 at 08:52 -0400, Nathan Weston wrote:
On 04/14/2012 05:16 AM, Erik Janssens wrote:
Hi,
How are debug builds supposed to work under windows ?
I'm observing a segfault that I can only reproduce on
windows, and would like to create a stackstrace
creating/deleting children does not change the refcount
of a QObject, since this is done purely in C++
On Thu, 2012-03-29 at 19:22 +0800, Goldfish Huang wrote:
Hi, all.
I am doubted how SIP deal with QObject's cycle reference, when I try
to fix some unknown memory leaks. It seems that SIP
Hello Pierre, Phil,
I'm not so sure the current behavior is inconsistent. One
of the reasons of using signal/slot over normal callbacks is
that they are disconnected when one of the objects gets
deleted.
So if you connect the destroyed signal to a non-QObject-method, the
slot is called. If you
We made a custom python distribution to be able to
use multiple qt/pyqt versions on the same machine
without those issues. It's python 2.7 though :
http://www.conceptive.be/python-sdk.html
On Thu, 2012-01-26 at 21:58 -0800, Suzanne Berger wrote:
I experimented with various releases of pyqt in
I can confirm this fix works for Qt 4.8.0 with python 2.7.2
Does this fix have side effects ?
On Wed, 28 Dec 2011 18:16:13 +0100, Linos info at linos.es wrote:
Hi,
after Qt upgrade to 4.8.0 in my machine i have been getting problems
with
the
painting of vertical headers in
Hello,
Camelot 11.11.16 has been uploaded to PyPi.
This release mainly brings the implementation of new
style actions to ease customization of Camelot
projects.
There is a tutorial that shows its features :
we use a stylesheet for this purpose, they are
rather easy to implement, and you can have one
for test, pre-production, production ...
http://doc.qt.nokia.com/latest/stylesheet.html
On Mon, 2011-10-17 at 22:00 +0200, Hans-Peter Jansen wrote:
On Sunday 16 October 2011, 21:14:44 Brad Buran
Hello,
Camelot 11.09.10 has been released. This is a stable release with minor
modifications. The most important change is probably the availability of
API documentation.
Regards,
Erik
Changes :
* Refresh reexecutes queries in the table view
* Deleted entities are grayed out in the GUI
what is a crash in PyQt can be a memleak in PySide ;)
On Fri, 2011-08-26 at 14:12 -0400, Joel B. Mohler wrote:
Hi,
Back in April of this year Jeremy Sanders reported crashes when storing a
python object in QModelIndex internalPointer. I've had crashes of this
nature
as well. It seems
Hi,
After lots of tries I have been able to get a stacktrace
+ core of a segfault that I believe occurs from time to time.
The attached stacktrace shows the segfault is inside the QT
event loop, without even involving Python.
What I believe that happens is this :
1) A signal is connected to a
I've tried to create a test case for the previously reported
issue.
It appears the bug does not appear when the queued slot call
is made after the sender has been deleted, but only if the
call is made while the sender is deleted.
To run the case, use :
python -m nose.core \\
Hello Phil,
I believe to have found a subtle bug in PyQt in
combination with the Python garbage collector.
Here is what I think that happens :
- A QObject is constructed in one thread,
and this QObject construction contains a cyclic
dependency.
- this construction will not be deleted with
PySide does not suffers from the same problem, instead
it appears to have a memory leak ...
___
PyQt mailing listPyQt@riverbankcomputing.com
http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Hi,
just wanted to note that the PyQt documentation
does not mark deprecated methods as such, while
the Qt documentation does.
eg : QHBoxLayout.setMargin
is deprecated, but appears as a normal method
in the PyQt docs
Regards,
Erik
___
PyQt mailing
.
For our client, many dlls are updated on a regular basis for bug
fixes. But you can update python code, since it's just stored in
a .zip file (just have the updater dl the updated zip file and copy it
over).
On Tue, Jun 28, 2011 at 6:41 PM, Erik Janssens
erik.janss...@conceptive.be wrote
that is wrong and will only lead to problems down the road.
And the last thing, is that we have an auto updater, so new releases only
require a rebuild and push to the sever.
On Jun 16, 2011 2:58 PM, Erik Janssens erik.janss...@conceptive.be
wrote:
Hi,
I would not agree with using Py2exe, while
Hi,
I would not agree with using Py2exe, while the idea is nice, we have had
many
issues with it, basically for 2 reasons :
- it's dependency analysis, in combination with automatic updates : if your
update
uses a part of a package that was not used in the original package, you
need to
Hello Phil,
good to hear you're going to the contributors summit, here are my
main concerns (pretty much in line with the other responses) :
- the OpenGL requirement : will this still work decent through remote
desktop and citrix. imho this is important for business
applications.
- QML /
- my concern is that we will need to build our apps using a
software open gl, simply to be able to use them without difficulties
for a large user base. and how this will impact the performance
of remote desktop and citrix. Unfortunately, it's not up to me to
dictate the users of my
build with VS 2008
http://www.python-camelot.com/cpd.html
On Wed, Apr 20, 2011 at 7:36 AM, Eric Frederich
eric.freder...@gmail.com wrote:
Is there a PyQt installer built with Visual Studio?
I am embedding a Python interpreter in a 3rd party application and creating
bindings to that same 3rd
I can confirm the issue in pyqt 4.8.3 / qt 4.7.2
it segfaults, but with the following assert statement :
.QObject::killTimers: timers cannot be stopped from another thread
ASSERT failure in QCoreApplication::sendEvent: Cannot send events to
objects owned by a different thread. Current thread
implications
of doing so.
Which book are you refering to ??
Regards,
Erik
On Sat, Jan 22, 2011 at 3:13 PM, Hans-Peter Jansen h...@urpla.net wrote:
On Friday 21 January 2011, 08:47:13 Erik Janssens wrote:
Hi,
I wrote some general documentation around these
issues, with regard to Camelot
Hi,
how is the method QWizardPage.registerField supposed to work
in combination with new style signal slots ?
it's third argument should be of type SIGNAL, however when
passing as its third argument a QtCore.pyqtSignal object, it complains
about an incorrect type.
using QtCore.SIGNAL works, but
a reference in python to a
qt object?
thanks
NIcola
Il giorno mer, 19/01/2011 alle 23.47 +0100, Erik Janssens ha scritto:
there was a change in sip/pyqt from 4.8.1 to 4.8.2 regarding
the detection of objects deleted by qt but still referenced in
python (which is the case here
?
thanks
NIcola
Il giorno mer, 19/01/2011 alle 23.47 +0100, Erik Janssens ha scritto:
there was a change in sip/pyqt from 4.8.1 to 4.8.2 regarding
the detection of objects deleted by qt but still referenced in
python (which is the case here). in 4.8.1 sip/pyqt tried to
detect
there was a change in sip/pyqt from 4.8.1 to 4.8.2 regarding
the detection of objects deleted by qt but still referenced in
python (which is the case here). in 4.8.1 sip/pyqt tried to
detect this to avoid segfaults. this detection however brought
other issues with it, therefor the detection was
Hello All,
I am trying to find the cause for a segfault that
is probably Qt / PyQt related.
But the segfault only happens on Windows.
As I am not a windows expert, is there somebody able
to explain how to debug / stacktrace / catch coredumps
under windows ?
All tips are appreciated.
Thx,
Hi,
just got a stacktrace of a segfault under Linux.
any suggestions of what I should be looking for ?
Thx,
Erik
Program terminated with signal 11, Segmentation fault.
#0 0x0019 in ?? ()
(gdb) bt
#0 0x0019 in ?? ()
#1 0x0121c209 in QObject::inherits (this=0xc37b6f8,
you could just access sql through python instead of through qt,
NULL would then correspond to None
On Tue, 2010-12-21 at 23:52 +0100, TP wrote:
Phil Thompson wrote:
API v1 will be supported until PyQt5 or Python v4.
Is it contractual? Why Python v4? It seems to me that nobody knows when
like
to understand what the line is about ?
Another option would be to deploy debug-builds on Windows, but
I'm really unfamiliar with doing such thing so I'd like to
avoid it.
Regards,
Erik
On Fri, 2010-12-17 at 18:47 +, Phil Thompson wrote:
On Fri, 17 Dec 2010 09:17:14 +0100, Erik
Hi,
has anybody experience with creating QWidgets outside the GUI
thread ?
I'd like to know if it's possible to construct QWidgets in some kind
of worker thread, and when they are needed, reparent them and
move them to the GUI thread before displaying them.
Regards,
Erik
! -+
On Fri, Dec 17, 2010 at 10:29, Erik Janssens
erik.janss...@conceptive.be wrote:
Hi,
has anybody experience with creating QWidgets outside the GUI
thread ?
I'd like to know if it's possible to construct QWidgets in some kind
of worker thread, and when they are needed, reparent
it does not crash on my python 2.7 - pyqt 4.8.1 - qt 4.7.1 build on Linux
On Wed, Dec 15, 2010 at 10:07 PM, Joe Planisky joe.plani...@temboo.com wrote:
Hi,
I've run into a strange situation with displaying text containing tab (\t)
and newline (\n) characters in a QLabel. The following code
Hello Phil,
one of my stress-test revealed a segfault occuring occasionaly.
I'm using a build of the latest qt release + pyqt snapshots.
Unfortunately, I have not been able to reproduce it yet with
a debug build.
Unless this stacktrace rings a bell somewhere, I'll try to
investigate it
Hi,
I was trying to build the latest snapshot of PyQt and
for a reason I don't understand, PyQt would always
build against QT installed on the system, despite pointing
it explicitly to a custom QT build using the -q option.
After many hours of looking, I found this was due to
the fact that I had
ok, thanks !
my build script now temporary removes qt.conf when building pyqt...
On Sat, Dec 11, 2010 at 5:35 PM, Phil Thompson
p...@riverbankcomputing.com wrote:
On Sat, 11 Dec 2010 14:31:08 +0100, Erik Janssens
erik.janss...@conceptive.be wrote:
Hi,
I was trying to build the latest
Hello Blaine,
crashes are always interesting. can you create an as small as possible
example that crashes ?
if possible, run it in a debugger as well, to see where exactly it crashes,
eg withing qt or pyqt or something else...
Erik
On Sun, Dec 12, 2010 at 2:38 AM, Blaine Bell
QImage has a 'scaled' method that can be used
to create thumbnails
On Sat, Dec 4, 2010 at 9:52 PM, James Polk jpolk5...@yahoo.com wrote:
I've found hints that Qt supports some image handling basics..
Is there any kind of functionality for image conversion?
And/or basic image resizing,
Dear all,
Camelot 10.11.27 has been released. This release uses the new style signal
slots connections.
Camelot is an open source RAD framework that leverages Python,
Sqlalchemy and Qt to
build database applications. Inspired by the Django admin interface,
Camelot allows a
developer to define
running this through gdb, got the debug symbols but so far I
haven't been able to make sense of it.
/Mikael
On 2 November 2010 17:50, Erik Janssens erik.janss...@conceptive.be wrote:
Hello Mikael,
first of all, you should use the latest version of PyQT / QT,
because previous versions
Thanks for making my day !
I was already considering a complete refactoring to
get around the issue.
On Thu, 2010-10-07 at 11:09 +0100, Phil Thompson wrote:
On Mon, 4 Oct 2010 22:27:59 +0200, Erik Janssens
erik.janss...@conceptive.be wrote:
Hi,
I finally got around writting a simple
Hi,
I have no idea on how to fix your issues, but I just compiled
pyqt for windows yesterday, you can download it at :
http://www.python-camelot.com/get-it.html
if you want. it's compiled with visual studio tough...
Erik
On Mon, Oct 4, 2010 at 12:18 PM, sunilrajkiran pichaimani
Hi,
I finally got around writting a simple test case to demonstrate
the deadlock in the signal/slot new style connections.
The test case can be ran using the following command :
python -m nose.core -v -s test_deadlock.py:SignalSlotCase
depending on the speed of your computer, it might take
Hi,
because there are some critical bugs in qt 4.7 that made
our applications segfault, I have made a custom pyqt
build for qt4.7, it can be downloaded from :
http://www.python-camelot.com/get-it.html
it's just a zip file, that you need to add to your
PATH / PYTHONPATH.
Regards,
Erik
, Phil Thompson wrote:
On Fri, 01 Oct 2010 09:21:27 +0200, Erik Janssens
erik.janss...@conceptive.be wrote:
I made some changes to sipconfig.py to get it running...
On Thu, 2010-09-30 at 22:26 +0100, Phil Thompson wrote:
On Thu, 30 Sep 2010 23:19:24 +0200, Erik Janssens
erik.janss
Hi,
I'm trying to build PyQt on Windows, because I want a QT 4.7 build
with OpenSSL included. And I try to build them all with the same
MS compiler, to be able to debug everything afterwards.
So far OpenSSL, QT and SIP build fine, but when I try to configure
PyQt, it only recognizes the QtCore
Hello Steve,
We've ran in more or less the same issues with the recent
refactoring of Camelot, here are some things I learned
(but I haven't found a decent solution yet) :
- those kind of bugs tend to appear more frequent on windows
than on Linux, I don't know why. But they happen on Linux
in it ensures that it doesn't segfaults,
but I would like to understand why it segfaults.
Thank you and best regards,
Erik
On Thu, 2010-09-09 at 15:46 +0100, Phil Thompson wrote:
On Thu, 09 Sep 2010 16:35:15 +0200, Erik Janssens
erik.janss...@conceptive.be wrote:
Hi,
I understand
Hello Phil,
I'm experiencing a segmentation fault in sip.
I have build the latest released versions of sip and
pyqt on ubuntu, to be able to have a decent stack trace.
The issue only arises when objects are garbage collected,
so I'm unsure on how to build a simple test case for it ?
When I
you and best regards,
Erik
On Thu, 2010-09-09 at 09:06 +0100, Phil Thompson wrote:
On Thu, 09 Sep 2010 09:40:43 +0200, Erik Janssens
erik.janss...@conceptive.be wrote:
Hello Phil,
I'm experiencing a segmentation fault in sip.
I have build the latest released versions of sip
.
Best regards,
Erik
On Mon, 2010-09-06 at 10:43 +0200, Hans-Peter Jansen wrote:
Dear Erik,
On Friday 27 August 2010, 21:56:14 Erik Janssens wrote:
Hi,
Another issue popped up when porting our code to
new style signal slots.
it appears the deadlock occurs when one thread
you need to add the location of the qt DLL's to the PATH of the
users (which might not be possible in a server set up), or simply
copy all the DLL's to the same location as python.exe, that will
do the trick.
notice that having clients run pyqt apps, where the pyqt binaries
are on a network
Hi,
We are switching our codebase to new style signal/slot and
this is a strange issue.
When connecting a QComboBox currentIndexChanged signal to
a slot :
def granularity_changed(self, idx):
granularity = self.sender().get_value()
sender returns the right object, however, when
Hi,
Another issue popped up when porting our code to
new style signal slots.
it appears the deadlock occurs when one thread is
emitting using a pyqtSignal object, while another
thread is connecting the same pyqtSignal object to
a slot, this is the pseudocode for the connection :
class(...):
Hi,
I'm having segfaults in the sip getattr function.
Apparently the code somewhere tries to resolve the '__dtor__' attribute.
This appears to happen when a bunch of widgets get destructed.
Nowhere in the code have custome __del__ or __dtor__ methods been
implemented.
Any idea on what is
...@conceptive.be
Cc: PyQT mailing list pyqt@riverbankcomputing.com
Message-ID: 1251678494.4741.26.ca...@ozzu
Content-Type: text/plain
On dom, 2009-08-30 at 11:22 +0200, Erik Janssens wrote:
Hi,
I'm having random deadlocks in my pyqt application (I don't do
any locking and such in the app itself
Hi,
I'm having random deadlocks in my pyqt application (I don't do
any locking and such in the app itself, but the app has
2 QThreads).
They appear to occur random when the application is used like
a madman (opening and closing windows all the time). A strange
observation is that the chances
Message: 2
Date: Fri, 24 Jul 2009 17:56:32 -0500
From: Robert Kern robert.k...@gmail.com
Subject: [PyQt] Re: QStyle manipulations
To: pyqt@riverbankcomputing.com
Message-ID: h4de70$pg...@ger.gmane.org
Content-Type: text/plain; charset=UTF-8; format=flowed
On 2009-07-24 10:26, Phil
I'm doing exactly the same in our application (Validation and database
access in a separate thread), and I have no issues whatsoever with the
GUI still freezing.
So I'm not sure either if the GIL is causing this and if you really need
to spawn another process (given the additional issues this
data it is called multiple times on the same cell, but for a
different role (eg : it is called once to get the text to display,
and another time to get the font size).
but you must make sure the data method returns very fast,
because it will get called a lot, since the view itself contains
no
I've had similar issues. One possibility I tried was first only loading
20 rows in the table, then do the resizeToContents and only then loading
the full data. That way, the columns are layout to fit those 20 rows.
It works well overall, but I later have just set all the
column widths
Indeed the model/view/delegate framework is very flexible and remains
snappy, even when displaying POPO's. The advantage of using an orm is that
you can display properties of your objects, along with attributes.
sqlalchemy / elixir is a very flexible framework that makes using complex
queries
Hi,
In my experience the big challenge with large applications with
lots of computations is to keep them responsive. This is difficult
in either C++ or python. I've run in a lot of difficulties in the
past with a large C++ QT app. When you want your application to be
multithreaded, you should
Hello Christophe,
I once addapted the QVTKRenderWindowInteractor to work
with the latest release of pyqt. Unfortunately it's not
perfect yet and it does work only on my windows machine.
So should you make improvements to it, please post it
back.
Regards,
Erik
On Sun, 2009-02-08 at 00:57
Dear all,
For those of you who attend FOSDEM this year,
you might be interested in the short tutorial I will
present on building GUI applications with
PyQt and Elixir/Sqlalchemy.
more information can be found at :
http://www.fosdem.org/2009/schedule/events/camelot
Regards,
Erik
Hi,
I'm having a pyqt segmentation fault, and I cannot find out what is
causing it. Can somebody make some suggestions on how to handle this ?
I tried to use gdb to get a back trace, but it doesn't make much sense
to me, it seems to be related to a c-function call, but I don't know
which one
Dear all,
I have created a custom editor widget together with a custom delegates,
used in a form together with a QDataWidgetMapper.
According to the documentation (and the source code confirms this), when
the editor has finished editing, the delegate should emit the commitData
signal, if this is
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