Re: PyQt4 - Issue with deleting a QWidget from a QGridLayout

Wed, 20 Aug 2014 02:37:21 -0700 

On Wed, 20 Aug 2014 00:11:24 +0200, Alex Murray wrote:

> <html><head></head><body><div style="font-family: Verdana;font-size:
> 12.0px;"><div>Hi,</div>
> 
> <div>&nbsp;</div>
> 
> <div>I&#39;ve discovered some very strange behaviour when trying to
> delete a QWidget from a QGridLayout. The following code demonstrates
> this behaviour:</div>
> 
> <div>&nbsp;</div>
> 
> <div>&gt;&gt;&gt; from PyQt4 import QtGui</div>
> 
> <div>&gt;&gt;&gt; import sys</div>
> 
> <div>&gt;&gt;&gt; app = QtGui.QApplication(sys.argv)</div>
> 
> <div>&gt;&gt;&gt; grid_layout = QtGui.QGridLayout()<br/>
> &gt;&gt;&gt; grid_layout.addWidget(QtGui.QWidget())<br/>
> &gt;&gt;&gt; item = self.grid_layout.takeAt(0)<br/>
> &gt;&gt;&gt; item.deleteLater()</div>
> 
> <div>Traceback (most recent call last):<br/>
> &nbsp; File &quot;&lt;stdin&gt;&quot;, line 1, in &lt;module&gt;<br/>
> AttributeError: &#39;QWidgetItem&#39; object has no attribute
> &#39;deleteLater&#39;</div>
> 
> <div>&nbsp;</div>
> 
> <div>This makes no sense to me whatsoever. Firstly, why is it returning
> a QWidgetItem when I inserted a QWidget to begin with? Secondly, every
> Qt object derives from QObject, and deleteLater() is a method of
> QObject, so that method should exist. Additional info:</div>
> 
> <div>
> <div>Python 2.7.6 (default, Mar 22 2014, 22:59:56)<br/>
> [GCC 4.8.2] on linux2</div>
> 
> <div>using PyQt4</div>
> </div></div></body></html>

Please do not post in HTML it makes everything an unreadable mess
(I have left you original post above so you can see what I mean.)



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