TKinter+matplotlib: передача введенных параметров графику

import matplotlib
matplotlib.use('TkAgg')
 
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
 
import numpy as np
 
import tkinter as tk
from tkinter import ttk
 
class SetOfBTCApp(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        container = tk.Frame(self)#рамки окна
 
        container.pack(side="top", fill="both", expand=True)
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)
        self.frames = {}
        for f in (StartPage, PageThree):
            frame = f(container, self)
            self.frames[f] = frame
            frame.grid(row=0, column=0, sticky="nwse")
 
        self.show_frame(StartPage)
 
    def show_frame(self, cont):
        frame = self.frames[cont]
        frame.tkraise()
 
a = int(0)
B = int(0)
 
 
def callback(event):
    global a
    a = ent1.get()
    global B
    B = ent2.get()
    controller.show_frame(PageThree)
 
class StartPage(tk.Frame):
 
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="a=", font=("Verdana", 12))
        label.place(y = 40, x = 140)
        ent1 = tk.Entry(self, width=20, bd=3)
        ent1.place(y=40, x=180)
 
        label1 = tk.Label(self, text="B=", font=("Verdana", 12))
        label1.place(y=70, x=140)
 
        ent2 = tk.Entry(self, width=20, bd=3)
        ent2.place(y=70, x=180)
        btn3 = ttk.Button(self, text="Graph page")
        btn3.place(y=100, x=200)
        btn3.bind("<Button-3>", lambda: callback)
 
 
class PageThree(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Graph Page", font=("Verdana", 12))
        label.pack(pady=10, padx=10)
        btn1 = ttk.Button(self, text="to home", command=lambda: controller.show_frame(StartPage))
        btn1.pack()
        fig = Figure(figsize=(5, 5), dpi=100)
        fn = fig.add_subplot(111)
        x = np.arange(1, B)
        y = a * x ** (3 / 2)
 
        fn.plot(x, y)
        canvas = FigureCanvasTkAgg(fig, self)
        canvas.show()
        toolbar = NavigationToolbar2TkAgg(canvas, self)
        toolbar.update()
        canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=True)
        canvas._tkcanvas.pack(side=tk.TOP, fill=tk.BOTH, expand=True)
 
 
app = SetOfBTCApp()
app.mainloop()

class Application(tk.Tk):
 
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
 
        self.ent1 = tk.Entry(self)
        self.ent1.pack()
 
        self.ent2 = tk.Entry(self)
        self.ent2.pack()
 
        ttk.Button(self, text="Graph page123", command=self.show).pack()
 
    def show(self):
        fig = Figure(figsize=(5, 5), dpi=100)
        fn = fig.add_subplot(111)
        x = np.arange(1, int(self.ent2.get()))
        y = int(self.ent2.get()) * x ** (3 / 2)
 
        fn.plot(x, y)
        canvas = FigureCanvasTkAgg(fig, self)
        canvas.show()
 
        toolbar = NavigationToolbar2TkAgg(canvas, self)
        toolbar.update()
        canvas.get_tk_widget().pack()
        canvas._tkcanvas.pack()

 self.btn = ttk.Button(self, text="Graph page123", command=self.show)
        self.btn.pack()

self.btn.config(state='disabled')

mport matplotlib
 
matplotlib.use('TkAgg')
 
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
 
import numpy as np
 
import tkinter as tk
from tkinter import ttk
 
 
 
class Application(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        title1 = self.title("draw a graph y = ax^(3/2)")
 
        print("made by zmk")
        self.label0 = tk.Label(self, text="y=ax^(3/2)")
        self.label0.pack()
        self.label1 = tk.Label(self, text="a=")
        self.label1.pack()
        self.ent1 = tk.Entry(self)
        self.ent1.bind('<Any-KeyRelease>', self.foo)
        self.ent1.pack()
 
        self.label2 = tk.Label(self, text="b=")
        self.label2.pack()
        self.ent2 = tk.Entry(self)
        self.ent2.bind('<Any-KeyRelease>', self.foo)
        self.ent2.pack()
 
        self.btn = ttk.Button(self, text="Graph page",state='disabled', command=self.show)
 
        self.btn.pack()
 
    def foo(self, event):
        data1 = self.ent1.get()
        data2 = self.ent2.get()
        if len(data1) != 0 and len(data2) != 0:
            self.btn.config(state='enabled')
 
    def show(self):
        self.btn.config(state='disabled')
        fig = Figure()
        fn = fig.add_subplot(111) 
        b = float(self.ent2.get())+1 
        x = np.arange(0, b)
        a = float(self.ent1.get())
        y = a * x ** (3 / 2)
        line = fn.plot(x, y,  label = 'y = %dx^(3/2)' %a, color = 'green', linewidth=4, alpha = 0.5)
        xax = fn.xaxis  
        yax = fn.yaxis 
 
        xlabels = xax.get_ticklabels()
        ylabels = yax.get_ticklabels()
 
        xax.grid(True)
        st = 'Growth of sales'
        fn.set_title(st, size=20, color='green')
        fn.set_xlabel('Äíè', {'fontname': 'Arial'}, fontweight='light', fontsize=14, color='grey')
        fn.set_ylabel('Îáúåì ïðîäàæ', {'fontname': 'Arial'}, fontweight='light', fontsize=14, color='grey')
 
        for label in xlabels:
 
            label.set_color('grey')
 
            label.set_fontsize(14)
 
        for label in ylabels:
            label.set_color("grey")
            label.set_fontsize(16)
 
        fn.legend(loc='best', frameon=True)
        canvas = FigureCanvasTkAgg(fig, self)
        canvas.show()
 
        toolbar = NavigationToolbar2TkAgg(canvas, self)
        toolbar.update()
        canvas.get_tk_widget().pack()
        canvas._tkcanvas.pack()
 
 
window = Application()
window.mainloop()