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Description
Using this code example:
import logging
from Qt import QtCore
from Qt import QtWidgets
class MainWind(QtWidgets.QMainWindow):
willclose = QtCore.Signal(int)
def __init__(self, *args, **kw):
super(MainWind, self).__init__(*args, **kw)
but = QtWidgets.QPushButton("hi")
self.setCentralWidget(but)
def closeEvent(self, evt):
closecode = 10
logging.info("will close '%s': %s: %s", self.objectName(), closecode, self)
self.willclose.emit(closecode)
return super(MainWind, self).closeEvent(evt)
class Runner(object):
def __init__(self, wind):
wind.willclose.connect(self.didclose)
self._wind = wind
@QtCore.Slot(int)
def didclose(self, closecode):
logging.info("didclose signal called with: %r", closecode)
def run(self):
self._wind.show()
exitcode = QtWidgets.QApplication.instance().exec_()
return exitcode
logging.basicConfig(level=logging.DEBUG)
app = QtWidgets.QApplication([])
wind = MainWind()
r = Runner(wind)
r.run()produces a TypeError when trying to connect a signal using python3 & PyQt5:
TypeError: connect() failed between MainWind.willclose[int] and didclose()
However, the same code runs fine using python3 & PySide2.
An undecorated didclose() method will also run using PyQt5, and a slot method that takes no arguments will also run.