I'm trying to use radio buttons in python for the first time and am having trouble getting the value of the selected radio button. print(test) just prints out "lamp". I already looked through a dozen topics on the same problem but could not find an answer.

tkinter imported as tk

def additionalData(df: DataFrame):
            global dataBox
            dataBox = tk.Tk()
            dataBox.title("Additional data")
            dataBox.geometry("300x375 800 400")
            dataBox.config(bg="lightgray")

            sensorLoc = StringVar(value="lamp")
            lblSensorLoc = tk.Label(dataBox, text="Sensor location:")
            lblSensorLoc.grid(row=3,column=1,pady=25)
            rdSL1 = tk.Radiobutton(dataBox, text="Ankle", variable=sensorLoc, value="Ankle", tristatevalue="x")
            rdSL1.grid(row=3,column=2)
            rdSL2 = tk.Radiobutton(dataBox, text="Foot", variable=sensorLoc, value="Foot", tristatevalue="x")
            rdSL2.grid(row=4,column=2)
            rdSL3 = tk.Radiobutton(dataBox, text="Shank", variable=sensorLoc, value="Shank", tristatevalue="x")
            rdSL3.grid(row=5,column=2, pady=25)

            test = sensorLoc.get()
            btn_save = Button(dataBox, text="SAVE", command=lambda: 
            [   
                print(test)
            ])
            btn_save.grid(row=7,column=2, pady=25)

I cut out most of the function to make it easier to read

CodePudding user response：

test = sensorLoc.get() will set test to 'lamp' and that's it! What you need is to update 'test' dynamically, like this.

test = sensorLoc.get
btn_save = tk.Button(dataBox, text="SAVE", command=lambda: [print(test())])

Now when button is pressed the current radiobutton value will be returned.