from gi.repository import Gtk

from gi.repository import Pango

import sys

books = [["Tolstoy, Leo", "War and Peace", "Anna Karenina"],

         ["Shakespeare, William", "Hamlet", "Macbeth", "Othello"],

         ["Tolkien, J.R.R.", "The Lord of the Rings"]]

class MyWindow(Gtk.ApplicationWindow):

    def __init__(self, app):

        Gtk.Window.__init__(self, title="Library", application=app)

        self.set_default_size(250, 100)

        self.set_border_width(10)

        # the data are stored in the model

        # create a treestore with one column

        store = Gtk.TreeStore(str)

        for i in range(len(books)):

            # the iter piter is returned when appending the author

            piter = store.append(None, [books[i][0]])

            # append the books as children of the author

            j = 1

            while j < len(books[i]):

                store.append(piter, [books[i][j]])

                j += 1

        # the treeview shows the model

        # create a treeview on the model store

        view = Gtk.TreeView()

        view.set_model(store)

        # the cellrenderer for the column - text

        renderer_books = Gtk.CellRendererText()

        # the column is created

        column_books = Gtk.TreeViewColumn(

            "Books by Author", renderer_books, text=0)

        # and it is appended to the treeview

        view.append_column(column_books)

        # the books are sortable by author

        column_books.set_sort_column_id(0)

        # add the treeview to the window

        self.add(view)

class MyApplication(Gtk.Application):

    def __init__(self):

        Gtk.Application.__init__(self)

    def do_activate(self):

        win = MyWindow(self)

        win.show_all()

    def do_startup(self):

        Gtk.Application.do_startup(self)

app = MyApplication()

exit_status = app.run(sys.argv)

sys.exit(exit_status)