how to edit label tkinter code example

Example 1: label change in tkinter

stud_input=StringVar()
stud_input.set("Label")
lbl3=Label(add_image_frame,textvariable=stud_input,bg="#ED6244",fg="black").grid(row=4,column=0)
stud_input.set("Changed Label")

Example 2: how to change the text of a label in tkinter

def press():
    Instruction.config(text='Button Pressed')