傳遞參數到函數python

Question

from Tkinter import * 

class Program:  
    def __init__(self): 
     b = Button(text="click me", command=self.callback("1")) 
     b.pack() 

    def callback(self,s): 
     print "clicked!" 

program = Program() 

mainloop()  

爲什麼執行功能befor點擊按鈕？ */

Answer 1

您應該傳遞函數參考command參數。否則，您可以執行該功能。

b = Button(text="click me", command=self.callback) 
# Or if you want to pass parameters 
b = Button(text="click me", command=lambda: self.callback("1"))