使用python Tkinter时，如何在显示相同输入文本的同一个类中停止两个输入框？

Question

I am having this issue with Python Tkinter. I am trying to make a user interface form screen which requires the user to enter values into entry box's displayed on screen. I have set it so the two Entry Box's are in the same class (that class being the interface screen). The problem is that while I type into one of the box's, the text which I type not only displays in the box in which I am typing into, but also in the other box.

Below is the code in question.

class GenericSkeleton: # The template for all the screens in the program

    def __init__(self): 

        self.GenericGui = Tk()
        self.GenericGui.title('Radial Arc Calculator')
        self.GenericGui.geometry('360x540')
        self.GenericGui.resizable(width = FALSE, height = FALSE)
        Label(self.GenericGui,text = 'Radial Arc Calculator',font = ('Ariel',18)).place(x=65,y=35)

    def destroy(self):

        self.GenericGui.destroy()



class InputScreen(GenericSkeleton):

    def __init__(self):  

        GenericSkeleton.__init__(self)

        Button(self.GenericGui,text = 'CALCULATE',height = 1, width = 25, command = calculate, font = ('TkDefaultFont',14)).place(x=37,y=400)
        Button(self.GenericGui,text = 'CLOSE',height = 1, width = 11, command = close, font = ('TkDefaultFont',14)).place(x=37, y=450)
        Button(self.GenericGui,text = 'HELP', height = 1, width = 11, command = DisplayHelp, font = ('TkDefaultFont',14)).place(x=190, y=450)

        Label(self.GenericGui,text = 'Enter Radius (mm):', font = ('TkDefaultFont',14)).place(x=37, y=180)
        Label(self.GenericGui,text = 'Enter point distance (mm):', font = ('TkDefaultFont',14)).place(x=37, y=250)

        Entry(self.GenericGui,textvariable = Radius, width = 10, font = ('TkDefaultFont',14)).place(x=210, y=180)
        Entry(self.GenericGui,textvariable = Distance, width = 5, font = ('TkDefaultFont',14)).place(x=265, y=250)    

run = InputScreen()

The entry box's are at the bottom of the code, I hope its enough/not too much to solve the problem.

Answer 1

The problem is that they both share the same textvariable (you use different variable names, but they have the same value which makes them the same in the eyes of tkinter). My advice is to not use the textvariable attribute. You don't need it.

However, if you remove the use of textvariable then you need to separate your widget creation from widget layout so that you can keep a reference to the widget. Then you can use the get method on the widget (rather than on the variable) to get the value:

self.entry1 = Entry(...)
self.entry2 = Entry(...)
self.entry1.place(...)
self.entry2.place(...)

Later, you can get the values like this:

radius = int(self.entry1.get())
distance = int(self.entry2.get())

If you do need the textvariable (usually only if you're using the trace feature of a tkinter variable), you must use a tkinter variable ( StringVar , IntVar , etc) rather than a regular variable.