Pyplot图形无法在tkinter窗口中绘制

Question

import tkinter as tk
from tkinter import ttk

import matplotlib
matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk
import matplotlib.animation as animation
from matplotlib import pyplot as plt

class graphPage(tk.Frame):
    def __init__(self, parent):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Graph Page")
        label.pack(padx=10, pady=10)

             
        canvas = FigureCanvasTkAgg(f, self)
        canvas.draw()
        canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=True)

        self.a = plt.subplot2grid((6,4), (0,0), rowspan = 5, colspan = 4)
        self.a.plot([1,2,3,4,5], [10,20,30,40,50], "#00A3E0", label = "high")
        
        toolbar = NavigationToolbar2Tk(canvas, self)
        toolbar.update()
        
        canvas._tkcanvas.pack(side=tk.TOP, fill=tk.BOTH, expand=True)
  

f = plt.figure()

class stock(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        
        container = tk.Frame()
        container.pack(side="top", fill="both", expand=True)
        container.grid_rowconfigure(index=0, weight=1)
        container.grid_columnconfigure(index=0, weight=1)         
        
        frame = graphPage(parent = container)
        frame.grid(row=0, column=0, sticky="nsew")
        
app = stock() 
app.mainloop()

tkinter窗口就是空白的，连标签都不显示。当不使用pyplot.figure时，标签是可以显示的。结果发现，jupyter notebook的默认交互模式是关闭的（False）。当改成开启（true）时，会打开一个叫做Figure的新窗口，并在里面绘制图表。不过，tkinter窗口还是空白的。

补充：使用stock = tk.Tk()来定义tkinter窗口可以解决这个问题。但是，这样做不太可行，因为我最终会有多个页面，这些页面会作为不同的框架加载到tkinter类中。