Python 3.x Tkinter在选项菜单选择发生更改时检测

目前正在使用记事本应用程序，并且OptionMenu小部件存在问题

self.fileOptionMenu = OptionMenu(self.master, self.var, *self.fileList, command=self.openFileCurrentDir)
self.fileOptionMenu.pack()

def openFileCurrentDir(self):
    print("inside openFileCurrentDir()")

---

更改选择后，

openFileCurrentDir（）

函数永远不会运行

您可以在

StringVar

上使用

trace

方法

def __init__(self,master):
    self.master = master
    self.var = StringVar()
    self.var.trace("w", self.openFileCurrentDir)
    l = ["A","B","C","D"]
    self.fileOptionMenu = OptionMenu(self.master, self.var, *l)
    self.fileOptionMenu.pack()

def openFileCurrentDir(self,*args):
    print("inside openFileCurrentDir()"+self.var.get())