How can I use the value from a spin box (or other Tkinter widget) properly in a calculation?
Question: I am writing a program in Python/Tkinter where I need to get the user's
inputted value from a spin box and use it in a mathematical calculation (to
calculate the cost of an item, more specifically). This is triggered by
pressing a button.

    
    
    from tkinter import *
    
    root = Tk()
    
    root.wm_title("Kiosk")
    root.geometry("300x75")
    root.resizable(0, 0)
    
    popcorn = Spinbox(root, from_=0, to=10, state="readonly")
    popcorn.pack()
    
    def getvalue():
        print(popcorn.get()*9)
    
    button = Button(root, text="Get value", command=getvalue)
    button.pack()
    
    
    root.mainloop()  
    

However, the problem I end up running into is the program not multiplying the
numbers together, but printing the number nine times. The output when I click
the button ends up something like "777777777". I set the spinbox to "readonly"
so the user can't input text, only the values I assigned.

Obviously this isn't my entire project, just an example of what I'm trying to
achieve.

Total newbie question, I know, but I can't seem to find the answer anywhere...
Any help is appreciated.


Answer: `popcorn.get()` returns a string you need to convert it to integer using `int`
or float point number using `float`.

    
    
    def getvalue():
        print(int(popcorn.get()) * 9)
    

