import tkinter

root = tkinter.Tk()
for i in range(5):
    tkinter.Label(root, text=("blah %d" % i)).pack()

def next_view():
    for widget in root.winfo_children():
        widget.destroy()

    tkinter.Label(root, text="this is view 2").pack()

tkinter.Button(root, text="next view", command=next_view).pack()
root.mainloop()