# Bug ~ tkinter event triggers

In the tkinter in python, write the code out of the bug, looking for a quite a while, remember this.

Import Tkinter AS TK
 from Tkinter Import Frame
 from   Tkinter Import MessageBox
 from   Tkinter Import font 
window = tk.Tk () # interface 
the_width, the_height window.maxsize = () # fullscreen length, width 
button_list = List () # button list 
each_width_height = 83 @ 9 # edge length of each button 
now_x = 0 # current position of the abscissa (0 to 8, the left side of the x-axis, y-axis above) 
now_y = 0 

# set screen title 
window.title ( " alpha pig Sudoku " )
 # set the screen size
window.geometry ( " {X} {} " .format (the_width, the_height)) 



# Font 
F1 = = font ( ' Arial ' , 12 is, ' Bold ' ) 
Shuzi = " wahaha " 
# Set the Label 
text = tk.Label (window, text = ' Sudoku ' , BG = ' Green ' , = font ( ' Arial ' , 12 is), width = 30, height = 2 ,)
 # label placement 
text.place (x = 90 * 12, y = 0) 

# event handler 
DEF Button1 (event):
    # Click the left mouse button 
    Print ( " 123 " )
     return 0 


# to an empty array assignment (empty array assignment must use append function, artifact!) 
For i in the Range (81 ): 
    button_list.append (tk.Button (window, text = Shuzi, Command = Button1, font F1 =, = each_width_height width, height = each_width_height // 2 ))
 # display button position 
for I in Range (. 9 ):
     for J in Range (. 9 ): 
        button_list [(I * + J. 9)]. Place (J * X = 90, Y = I 90 *) # Note that the order of the list of coordinates, xy reversed bit 
#For each button, regarded left-click mouse events (ie <Button-1>) and a custom event handler to bind button1 
for i in the Range (9 ):
     for J in the Range (9 ): 
        button_list [( I * + J. 9)]. the bind ( " <-the Button. 1> " , Button1) 


# enter the message loop 
window.mainloop ()

When I just press a button, the program error.

Because

button_list[(i * 9 + j)].bind("<Button-1>",button1)

versus

button_list.append(tk.Button(window,text=shuzi,command = button1 ,font = f1,width=each_width_height,height=each_width_height//2))

Medium manner

command = button1

Repeated (or conflict)

Solution either 1 or 2:

Method 1: Remove

command = button1

Method 2:

The

for i in range(9):
    for j in range(9):
        button_list[(i * 9 + j)].bind("<Button-1>",button1)

This code is removed, and then have to put

# Event handler 
DEF Button1 (Event):
     # Click the left mouse button 
    Print ( " 123 " )
     return 0

Remove event parameters in parentheses (because command = button1 no arguments are passed, so the event should be deleted, otherwise it will error: "button1 function has one parameter, but the actual received 0")

Obviously, the method can not be delivered event, that is event handler can not determine the type of event happened.