tkinter entry box show normal text code example
Example 1: write in entry() in tkinter
v = StringVar()
e = Entry(master, textvariable=v)
e.pack()
v.set("a default value")
s = v.get()
Example 2: write in entry() in tkinter
e = Entry(master)
e.pack()
e.delete(0, END)
e.insert(0, "a default value")