Read Contents of txt file and display in Tkinter GUI Python

Hey i have successfully created a tkinter GUI in python which saves the Entered values in a text file...Here is the code-

from Tkinter import *
root = Tk()
def save():
    open("text.txt","w").close()
    text = e.get() + "\n" + e1.get() + "\n" +  e2.get() + "\n"
    with open("text.txt", "a") as f:
        f.write(text)
w1 = Label(root, text="Controller value")
w1.pack()
e = Entry(root)
e.pack()
w2 = Label(root, text="Velocity")
w2.pack()
e1 = Entry(root)
e1.pack()
w3 = Label(root, text="Desired Heading")
w3.pack()
e2 = Entry(root)
e2.pack()
toolbar = Frame(root)
b = Button(toolbar, text="save", width=9, command=save)
b.pack(side=LEFT, padx=2, pady=2)
toolbar.pack(side=TOP, fill=X)
mainloop()

...

Now what i want to do is create 3 new Textboxes in the GUI which will Display the contents of the file..for eg- my text.txt file has the contents-

3

2

4

Now i want each of these 3 values to be displayed in 3 textboxes in the GUI.... Help me out please. Basically i want the first textbox in the GUI to display 3, second textbox 2 and third textbox 4...