[Tkinter-discuss] get root.winfo_pointerxy()

[守株待兔]

[code]
from Tkinter import * 
 
root = Tk() 
root.title('Simple Plot - Version 1') 
 
canvas = Canvas(root, width=450, height=300, bg = 'white') 
canvas.pack() 
Button(root, text='Quit', command=root.quit).pack() 
 
canvas.create_line(100,250,400,250, width=2) 
canvas.create_line(100,250,100,50,  width=2) 
 
for i in range(11): 
    x = 100 + (i * 30) 
    canvas.create_line(x,250,x,245, width=2) 
    #canvas.create_text(x,320, text='%d'% (10*i), anchor=N) 
 
for i in range(6): 
    y = 250 - (i * 40) 
    canvas.create_line(100,y,105,y, width=2) 
    canvas.create_text(96,y, text='%5.1f'% (50.*i), anchor=E) 
 
for x,y in [(12, 56), (20, 94), (33, 98), (45, 120), (61, 180), 
            (75, 160), (98, 223)]: 
    x = 100 + 3*x 
    y = 250 - (4*y)/5 
    canvas.create_oval(x-6,y-6,x+6,y+6, width=1, 
                       outline='black', fill='SkyBlue2')


def  myprint():
    print  root.winfo_pointerxy()

canvas.bind("<Button-1>",myprint) 
 
root.mainloop()
[/code]

when  i  click my left  mouse,there is a output:

 File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1413, in __call__
    return self.func(*args)
TypeError: myprint() takes no arguments (1 given)

what's wrong?
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