<store>
    <bookstore>
        <book>
            <title lang="en">IT book</title>
            <author>Some IT Guy</author>
        </book>
    </bookstore>
  </store>

root = et.parse('Template.xml').getroot()
bookstore = root.find('bookstore')
book = root.find('bookstore').find('book')

for bk in bks:
    book.find('Title').text = bk
    books.append(book)

book[0].append(book) and book[-1].append(book)