def keyPressEvent(self, event):
k = event.key()
m = int(event.modifiers())
if k == QtCore.Qt.Key_Return or k == QtCore.Qt.Key_Enter:
self.parse_and_plot()
elif QtGui.QKeySequence(m+k) == QtGui.QKeySequence('Ctrl+Q'):
self.close()
elif QtGui.QKeySequence(m+k) == QtGui.QKeySequence('Ctrl+S'):
self.save_plot()
else:
event.ignore()
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