[PyKDE] Found cure for bizarre backtrace - ???
bill at soudan.net
Tue Jul 2 17:07:00 BST 2002
On Tue, 2 Jul 2002, Bill Soudan wrote:
> I'm going to do some more debugging today. If I can't find anything else
> out about the exception, I'll prune the code down and post it.
Alright, I've narrowed the culprit down to my subclassed QListViewItem.
I add a single MonitorItem to the listview, send rapid-fire XMLRPC
messages to the GUI, and when I click on the item, the exception occurs.
def __init__(self, host, port, parent = None, name = None):
QListViewItem.__init__(self, parent, name)
def text(self, column):
I've found two different ways to get rid of the dump:
1) don't override the text method. Not really practical.
2) modify the text method to return QString('text') instead of just 'text'.
I always thought PyQt is supposed to convert between Python strings and
QStrings automatically. I reviewed the docs though and they don't
specifically say whether returning Python strings from C++ methods is
acceptable, nor does QListViewItem have any caveats listed. So is #2 the
If not, the fact that this is completely unrelated to the xmlrpc code
leads me to believe there's something wacky going on under the hood that I
don't know about. While eventually, in the final version of the code, I
want to have XMLRPC calls that manipulate the listview, I have removed all
coupling in the current version.
Is there some sort of corruption occuring when I return a Python string
from the text method that later triggers the strange exception? I've
listed it below for reference again.
In the meantime, I'm going to keep pruning and once I get something
reasonably short I'll post it to the list.
Exception happened during processing of request from ('xxx.xxx.xxx.xxx',
Traceback (most recent call last):
File "/usr/lib/python2.2/SocketServer.py", line 221, in handle_request
File "/usr/lib/python2.2/SocketServer.py", line 240, in process_request
File "/usr/lib/python2.2/SocketServer.py", line 253, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/usr/lib/python2.2/SocketServer.py", line 513, in __init__
File "/usr/lib/python2.2/SocketServer.py", line 557, in setup
self.rfile = self.connection.makefile('rb', self.rbufsize)
AttributeError: 'str' object has no attribute 'sipThis'
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