Have multiple commands when button is pressed

问题

I want to run multiple functions when I click a button. For example I want my button to look like

self.testButton = Button(self, text = "test", 
                         command = func1(), command = func2())

when I execute this statement I get an error because I cannot allocate something to an argument twice. How can I make command execute multiple functions.

回答1:

You could create a generic function for combining functions, it might look something like this:

def combine_funcs(*funcs):
    def combined_func(*args, **kwargs):
        for f in funcs:
            f(*args, **kwargs)
    return combined_func

Then you could create your button like this:

self.testButton = Button(self, text = "test", 
                         command = combine_funcs(func1, func2))

回答2:

You can simply use lambda like this:

self.testButton = Button(self, text=" test", command=lambda:[funct1(),funct2()])

回答3:

def func1(evt=None):
    do_something1()
    do_something2()
    ...

self.testButton = Button(self, text = "test", 
                         command = func1)

maybe?

I guess maybe you could do something like

self.testButton = Button(self, text = "test", 
                         command = lambda x:func1() & func2())

but that is really gross ...

回答4:

You can use the lambda for this:

self.testButton = Button(self, text = "test", lambda: [f() for f in [func1, funct2]])

回答5:

Button(self, text="text", command=func_1()and func_2)

回答6:

I've found also this, which works for me. In a situation like...

b1 = Button(master, text='FirstC', command=firstCommand)
b1.pack(side=LEFT, padx=5, pady=15)

b2 = Button(master, text='SecondC', command=secondCommand)
b2.pack(side=LEFT, padx=5, pady=10)

master.mainloop()

... you can do...

b1 = Button(master, command=firstCommand)
b1 = Button(master, text='SecondC', command=secondCommand)
b1.pack(side=LEFT, padx=5, pady=15)

master.mainloop()

What I did was just renaming the second variable b2 the same as the first b1 and deleting, in the solution, the first button text (so only the second is visible and will act as a single one).

I also tried the function solution but for an obscure reason it don't work for me.

回答7:

this is a short example : while pressing the next button it will execute 2 functions in 1 command option

    from tkinter import *
    window=Tk()
    v=StringVar()
    def create_window():
           next_window=Tk()
           next_window.mainloop()

    def To_the_nextwindow():
        v.set("next window")
        create_window()
   label=Label(window,textvariable=v)
   NextButton=Button(window,text="Next",command=To_the_nextwindow)

   label.pack()
   NextButton.pack()
   window.mainloop()

来源：https://stackoverflow.com/questions/13865009/have-multiple-commands-when-button-is-pressed

标签

python

python-2.7

button

tkinter

command