title: Python tkinter entrybox cursor
body: <p>I have a tkinter page that will ask for user name and password( 2 entry boxes are used for this purpose). What i want is as soon as user run the script, the cursor should be in the username field(1st entry box)so that the user can type in the username without having to use mouse to click on the entry box before typing. Is there anyway to do it? </p>