"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? -- http://mail.python.org/mailman/listinfo/python-list
