Thank you so much! It works now! Have a good day! :)

On Monday, July 17, 2017 at 2:14:57 AM UTC+9, Vasilije Mehandzic wrote:
>
> Try to *QtGui.QApplication.processEvents()* after 
> *self.curve_1.setData(self.deq)*:
>
>     def plot(self, msg):
>         print('Plotter received: ', msg)
>         self.deq.append(msg)
>         print(self.deq)
>         self.curve_1.setData(self.deq)
>         QtGui.QApplication.processEvents()
>
>
>

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