importtkinterastkfromtkinterimportttkfrommatplotlib.backends.backend_tkaggimportFigureCanvasTkAggfrommatplotlib.figureimportFigureimportnumpyasnpclassMain_Program(tk.Tk):def__init__(self,*args,**kwargs):tk.Tk.__init__(self,*args,**kwargs)self.geometry("500x500")# ---------------------------------------- TOP FRAME (Button)self.top_frame=tk.Frame(self)ttk.Button(self.top_frame,text="Update graph",command=self.update_graph).pack()self.top_frame.pack()# ---------------------------------------- BOTTOM FRAME (Graph)self.bottom_frame=tk.Frame(self)DisplayGraph(self.bottom_frame,x_limit= (-10,10) ,delta_x=0.1 ,y_input="2*x+2" )self.bottom_frame.pack()defupdate_graph(self):# ----------------------------- CLEARforwidgetinself.bottom_frame.winfo_children():widget.destroy()#  ----------------------------- DISPLAY NEW GRAPHDisplayGraph(self.bottom_frame,x_limit= (-10,10) ,delta_x=0.1 ,y_input="2*x+2" )classDisplayGraph:def__init__(self,passed_frame,x_limit=(),# TUPLE (-10,10)delta_x=0.0,# FLOAT 0.1y_input='',# STRING 2*x+2figsize_x=6,figsize_y=5):self.x_limit=x_limitself.delta_x=delta_xself.y_input=y_input# ---------------------------------------------------------- CREATE FIGURE AND SUBPLOTself.fig=Figure(figsize=(figsize_x,figsize_y),dpi=100)self.ax=self.fig.add_subplot(111)self.ax.grid()# ---------------------------------------------------------- PLOTself.plot_input()# ---------------------------------------------------------- PACK AND DRAWself.canvas_frame=tk.Frame(passed_frame,bg="black")self.canvas_mat=FigureCanvasTkAgg(self.fig,master=self.canvas_frame)self.canvas_mat.get_tk_widget().pack(anchor="center",expand=True,padx=2,pady=2)self.canvas_frame.pack(side=tk.LEFT,anchor="center",expand=True)self.canvas_mat.draw()# ----------------------------------------------------------defplot_input(self):x=np.arange(self.x_limit[0],self.x_limit[1],self.delta_x)y=eval(self.y_input)self.ax.plot(x,y)App=Main_Program()App.mainloop()