code: def mouseUp(self, event):
      self.state = ""
  
imports: import wx
  import numpy
  from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg
  from matplotlib.figure import Figure
label_desc: Use image node_id 6 for calling the FourierDemoFrame obj's underlying member method code with example usage: obj.mouseUp(event) without return types