import tkinter as tk
import webbrowser
import tkinter.font

def main():
    root=tk.Tk()
    root.geometry("100x50")
    label_font=tkinter.font.Font(size=10,underline=True)
    link=tk.Label(root,text="とものプログブログ",fg="blue",cursor="hand1",font=label_font)
    link.pack()
    link.bind("<Button-1>",lambda e:link_click("https://tomtom-stock.com"))
    root.mainloop()

def link_click(url):
    webbrowser.open_new(url)

if __name__=="__main__":
    main()