How to use the qtconsole.qt.QtCore.pyqtSlot function in qtconsole

    @QtCore.pyqtSlot()
    def on_actionOpen_triggered(self):
        getExistingDirectory = QtGui.QFileDialog.getExistingDirectory
        path = getExistingDirectory(self, caption="Open recording, track, or animal",
                                    directory=self.path)
        path = str(path)
        if path == '':
            return
        self.path = os.path.normpath(os.path.join(path, os.pardir)) # update with path's parent

        head, tail = os.path.split(path)
        if tail[0].isnumeric(): # asume it's a recording
            self.open_recording(path)
        elif tail.startswith('tr'): # assume it's a track
            self.open_track(path)
        else:
            self.open_animal(path) # assume it's an animal

    @QtCore.pyqtSlot()
    def on_action_ptc22_triggered(self):
        path = os.path.join(SLABPATH, 'ptc22')
        self.open_animal(path)

    @QtCore.pyqtSlot()
    def on_actionAboutNeuropy_triggered(self):
        lf = open('../LICENSE', 'r')
        LICENSE = lf.read()
        lf.close()
        ipverstr = ('%d.%d.%d.%s' % IPython.version_info).rstrip('.')
        system = """<p>Python %s, IPython %s, Qt %s, PyQt %s<br>
                    %s</p>""" % (platform.python_version(), ipverstr,
                                 QtCore.QT_VERSION_STR, QtCore.PYQT_VERSION_STR,
                                 platform.platform())
        text = """
        <h2><a href="http://neuropy.github.io">neuropy</a> %s</h2>
        <p>A tool for neuronal spike, stimulus, and LFP data analysis</p>

        <p>Copyright © 2006-2017 <a href="http://mspacek.github.io">Martin Spacek</a><br>
        
           <a href="http://swindale.ecc.ubc.ca">Swindale</a> Lab,</p>

    @QtCore.pyqtSlot()
    def on_action_ptc17_triggered(self):
        path = os.path.join(SLABPATH, 'ptc17')
        self.open_animal(path)

    @QtCore.pyqtSlot()
    def on_action_pvc107_triggered(self):
        path = os.path.join(BLABPATH, 'PVCre_0107')
        self.open_animal(path)

    @QtCore.pyqtSlot()
    def on_actionShell_triggered(self):
        ipshell()

    @QtCore.pyqtSlot()
    def on_action_ptc21_triggered(self):
        path = os.path.join(SLABPATH, 'ptc21')
        self.open_animal(path)

    @QtCore.pyqtSlot()
    def on_action_ptc15_triggered(self):
        path = os.path.join(SLABPATH, 'ptc15')
        self.open_animal(path)

    @QtCore.pyqtSlot()
    def on_actionAboutQt_triggered(self):
        QtGui.QMessageBox.aboutQt(self)

    @QtCore.pyqtSlot()
    def on_action_pvc113_triggered(self):
        path = os.path.join(BLABPATH, 'PVCre_0113')
        self.open_animal(path)