import tkinter as tk
win = tk.Tk()
can = tk.Canvas(win, width=300, height=300)
strvar = tk.StringVar()
lab = tk.Label(win, textvar=strvar)
strvar.set("Press a key")
def on_click(event=None):
can.create_oval((event.x - 5, event.y - 5, event.x + 5, event.y + 5), fill="red")
def on_key_down(event=None):
strvar.set(event.keysym)
def on_ctrl_d(event=None):
top = tk.Toplevel(win)
top.geometry("200x200")
sv = tk.StringVar()
sv.set("Hover the mouse over me")
label = tk.Label(top, textvar=sv)
label.bind("<Enter>", lambda e, sv=sv: sv.set("Hello mouse!"))
label.bind("<Leave>", lambda e, sv=sv: sv.set("Goodbye mouse!"))
label.pack(expand=1, fill=tk.BOTH)
can.bind('<Button-1>', on_click)
win.bind('<Control-d>', on_ctrl_d)
win.bind('<KeyPress>', on_key_down)
win.bind('<e>', lambda e, s=lab: lab.configure(font=(None, 18)))
can.pack()
lab.pack(side=tk.BOTTOM)
win.mainloop()
