Python 2.7 您可以为Tkinter选项菜单分配多个命令吗？

我有以下选项菜单：

    self.wcartsn = StringVar(self.frame1)                                                  
    self.e1 = OptionMenu(self.frame1, self.wcartsn, *watercarts, command=(self.wcart, lambda selection:self.other_entry(selection,'wcartsn',10,6)))   
    self.e1.grid(row=10, column=5, stick=E+W)

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这实际上不起作用，但它清楚地说明了我的问题如何（如果可能）从一个选项菜单调用多个函数？此函数给出错误

TypeError:“tuple”对象不可调用

您可以创建一个函数，依次调用多个函数：

def compose(functions):
    """
    returns a single function composed from multiple functions.
    calling the returned function will execute each of the functions in the order you gave them.
    """
    def f(*args, **kargs):
        for function in functions:
            function(*args, **kargs)
    return f


self.e1 = OptionMenu(self.frame1, self.wcartsn, *watercarts, command=compose(self.wcart, lambda selection:self.other_entry(selection,'wcartsn',10,6)))   

最简单的解决方案——也是最容易维护的解决方案——是创建一个调用其他函数的函数：

def __init__(self):
    ...
    self.wcartsn = StringVar(self.frame1)                                                  
    self.e1 = OptionMenu(self.frame1, self.wcartsn, *watercarts, command=self.wcartsnCallback)   
    ...

def wcartsnCallback(self, selection):
    self.wcart()
    self.other_entry(selection,'wcartsn',10,6)