I know its pretty late but for someone who still wants to know...full working example is below.
from tkinter import *
import webbrowser
def callback(url):
webbrowser.open_new_tab(url)
def TEstWin():
toplevel = Toplevel(ws)
toplevel.title("Test window")
toplevel.geometry("230x80")
l1=Label(toplevel, image="::tk::icons::information")
l1.grid(row=0, column=0)
l2=Label(toplevel,text="Test")
l2.grid(row=0, column=1)
left_label = Label(toplevel, text='Weblink', cursor="hand2", relief='raised', foreground='blue')#text= "Left-bottom")
left_label.grid(row=2, column=2)
left_label.bind("<Button-1>", lambda e:callback("https://robot.jbnu.ac.kr/robot/21492/subview.do"))
ws = Tk()
ws.geometry("300x200")
ws.title('Python Guides')
ws.config(bg='#345')
Button(ws,text="Test the window",command=TEstWin).pack(pady=80)
ws.mainloop()