如何从 tkinter 输入框中获取整数？

Question

I am trying to work out how to get a value from a tkinter entry box, and then store it as a integer. This is what I have:

AnswerVar = IntVar()
AnswerBox = Entry(topFrame)
AdditionQuestionLeftSide = random.randint(0, 10)
AdditionQuestionRightSide = random.randint(0, 10)
AdditionQuestionRightSide = Label(topFrame, text= AdditionQuestionRightSide).grid(row=0,column=0)
AdditionSign = Label(topFrame, text="+").grid(row=0,column=1)
AdditionQuestionLeftSide= Label(topFrame, text= AdditionQuestionLeftSide).grid(row=0,column=2)
EqualsSign = Label(topFrame, text="=").grid(row=0,column=3)
AnswerBox.grid(row=0,column=4)
answerVar = AnswerBox.get()
    
root.mainloop() 
(


)

I want to take then input from AnswerBox, and store it in the integer variable "answer". How can I do this?

Thanks

Answer 1

Since you have an IntVar associated with the entry widget, all you need to do is get the value of that object with the get method:

int_answer = answer.get()

If you don't use an IntVar , you can get the value of the entry widget and the convert it to an integer with int :

string_answer = AnswerBox.get()
int_answer = int(string_answer)

Answer 2

To get a value from an Entry widget in tkinter you call the get() method on the widget. This will return the widget's value.

So you would do answer = AnswerBox.get()

Answer 3

I have Done the same thing But it gives the following error.

    Traceback (most recent call last):
  File "G:/Coding/Python/first-hit/Mangal's CAFE.py", line 228, in <module>
    print(int(x))
ValueError: invalid literal for int() with base 10: ''