On Tue, 28 Apr 2009 14:54:41 +0200, "Denis L" <n...@spam.com> wrote: > "Phil Thompson" <p...@riverbankcomputing.com> wrote in message > news:mailman.4664.1240907352.11746.python-l...@python.org... >> On Tue, 28 Apr 2009 03:53:34 +0200, "Denis L" <n...@spam.com> wrote: >>> Hello, >>> >>> I'm experiencing odd errors on both windows and linux with the following >>> code: >>> >>> import sys >>> from PyQt4.QtCore import * >>> from PyQt4.QtGui import * >>> >>> class Options(QDialog): >>> def __init__(self, values): >>> QDialog.__init__(self) >>> >>> self.values = values >>> >>> fooEdit = QLineEdit(values['foo']) >>> self.connect(fooEdit, SIGNAL('textChanged(QString)'), >>> lambda value: self.optionChanged('foo', value)) >>> >>> barEdit = QLineEdit(values['bar']) >>> self.connect(barEdit, SIGNAL('textChanged(QString)'), >>> lambda value: self.optionChanged('bar', value)) >>> >>> layout = QVBoxLayout() >>> layout.addWidget(fooEdit) >>> layout.addWidget(barEdit) >>> >>> self.setLayout(layout) >>> >>> def optionChanged(self, option, value): >>> self.values[option] = value >>> print self.values >>> >>> def main(args): >>> app = QApplication(args) >>> values = dict(foo='', bar='') >>> dialog = Options(values) >>> dialog.show() >>> app.exec_() >>> >>> if __name__ == '__main__': >>> main(sys.argv) >>> >>> >>> If I type a character in fooEdit, another character in barEdit, and then >>> delete the character from barEdit I get an unhandled win32 exception >>> occured >>> in python.exe on windows and segfault on linux. >>> >>> If I type a character in fooEdit, delete it, and then type a character >>> in >> >>> barEdit I get: >>> >>> {'foo': PyQt4.QtCore.QString(u'a'), 'bar': ''} >>> {'foo': PyQt4.QtCore.QString(u''), 'bar': ''} >>> {'foo': Traceback (most recent call last): >>> File "L:\home\dev\python\test.py", line 17, in <lambda> >>> lambda value: self.optionChanged('bar', value)) >>> File "L:\home\dev\python\test.py", line 27, in optionChanged >>> print self.values >>> MemoryError >>> >>> I'm using Python 2.5.4 and PyQt 4.4.3-1 >>> >>> Thanks in advance for any help. >> >> Works fine for me with current versions. >> >> Phil > > I have noticed that if I do "self.values[option] = QString(value)" > instead of "self.values[option] = value" in optionChanged I don't get any
> errors. > > Is it perhaps not safe to keep the reference to the lambda QString > argument? It shouldn't make any difference. Phil -- http://mail.python.org/mailman/listinfo/python-list
