How to set matplotlib graph into tkinter window (by subplots)

matplotlib_in_tkinter_by_subplots.py

import ctypes
import matplotlib.pyplot as plt
import numpy as np
import tkinter
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk


if __name__ == "__main__":
    ctypes.windll.shcore.SetProcessDpiAwareness(1)

    root = tkinter.Tk()
    root.title("matplotlib 埋め込み")

    #Graph data
    x = np.linspace(0, 2*np.pi, 400)
    y = np.sin(x)

    #Graph object
    fig, ax = plt.subplots()    #subplots
    ax.plot(x, y)               #2DLine
    plt.close()                 #!!close!!

    #set graph to tkinter
    canvas = FigureCanvasTkAgg(fig, root)
    toolbar = NavigationToolbar2Tk(canvas, root)
    canvas.get_tk_widget().pack()           #show graph

    root.mainloop()