创建下拉列表和执行所需操作所需的Python Tkinter帮助

Question

I can create the below option menu but my question is when I select any value from dropdown it should display value stored in a variable 'a' for c[4] , value stored in a variable 'b' for C[5] and for all others it should show text "none available".

I have tried to cut short as far as possible.

        master = Tk()
    variable = StringVar(master)
variable.set("Summary")
w = OptionMenu(master, variable, c[0], c[1], c[3],c[4],c[5],c[6],c[7])
w.pack()
mainloop()

How should I print the output do I need to use

'def ok():print("value is", var.get())'

and then a button:

button = Button(master, text="OK", command=ok)

Answer 1

Use the Tkinter OptionMenu widget, and create a text variable to track the value of the selection. You can call .get() on the variable to find out what's selected. ie.

s = tk.StringVar()
tk.OptionMenu(window, s, c[0], c[1]...  )

def function(x):
    # use x to find data
    ...

button = tk.Button(window, text='Button', command= lambda x=s.get() : function(x) )

You need a button aswell, so keep the one you've got and the command should use .get() to get the dropdown selection, then you can use that info to find your data.

The effbot docs are quite good for explaining how to use tkinter widgets.