[Tkinter-discuss] what is the meanning of triple?

[守株待兔]

here is the code:
from Tkinter import * 
from tkColorChooser import askcolor 
      
def setBgColor(): 
    (triple, hexstr) = askcolor() 
    if hexstr: 
        print hexstr
        push.config(bg=hexstr) 
      
root = Tk() 
push = Button(root, text='Set Background Color', command=setBgColor) 
push.config(height=3, font=('times', 20, 'bold')) 
push.pack(expand=YES, fill=BOTH) 
root.mainloop()

 in  the  (triple, hexstr) = askcolor(), i want to know the meaning of triple??
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