Example tkinter event and draw canvas

tkcanvas.py

import tkinter

root = tkinter.Tk()
root.geometry("600x400")
canvas = tkinter.Canvas(root, width=600, height=400, bg="white")
canvas.pack()

def event_handler(event):
    print(event)
    if event.type == tkinter.EventType.ButtonRelease:
        canvas.create_oval(event.x - 20, event.y - 20, event.x + 20, event.y + 20, fill="red", width=0)

for event_type in tkinter.EventType.__members__.keys():
    # Ignore them because they occur frequently.
    if event_type in ("Expose", "Motion"):
        continue
    event_seq= "<" + event_type + ">"
    try:
        canvas.bind_all(event_seq, event_handler)
        #print(event_type)
    except tkinter.TclError:
        pass
        #print("bind error:", event_type)

root.mainloop()