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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _draw_content(self):
 """ Loop through submissions and fill up the content page. """

        n_rows, n_cols = self.term.stdscr.getmaxyx()
        window = self.term.stdscr.derwin(n_rows - self._row - 1, n_cols, self._row, 0)
        window.erase()
        win_n_rows, win_n_cols = window.getmaxyx()

        self._subwindows = []
        page_index, cursor_index, inverted = self.nav.position
        step = self.nav.step

        # If not inverted, align the first submission with the top and draw
        # downwards. If inverted, align the first submission with the bottom
        # and draw upwards.
        cancel_inverted = True
        current_row = (win_n_rows - 1) if inverted else 0
        available_rows = win_n_rows
        top_item_height = None if inverted else self.nav.top_item_height
        for data in self.content.iterate(page_index, step, win_n_cols - 2):
            subwin_n_rows = min(available_rows, data['n_rows'])
            subwin_inverted = inverted
            if top_item_height is not None:
                # Special case: draw the page as non-inverted, except for the
                # top element. This element will be drawn as inverted with a
                # restricted height
                subwin_n_rows = min(subwin_n_rows, top_item_height)
                subwin_inverted = True
                top_item_height = None
            subwin_n_cols = win_n_cols - data['h_offset']
            start = current_row - subwin_n_rows + 1 if inverted else current_row
            subwindow = window.derwin(subwin_n_rows, subwin_n_cols, start, data['h_offset'])
            self._subwindows.append((subwindow, data, subwin_inverted))
            available_rows -= (subwin_n_rows + 1)  # Add one for the blank line
            current_row += step * (subwin_n_rows + 1)
            if available_rows <= 0:
                # Indicate the page is full and we can keep the inverted screen.
                cancel_inverted = False
                break

        if len(self._subwindows) == 1:
            # Never draw inverted if only one subwindow. The top of the
            # subwindow should always be aligned with the top of the screen.
            cancel_inverted = True

        if cancel_inverted and self.nav.inverted:
            # In some cases we need to make sure that the screen is NOT
            # inverted. Unfortunately, this currently means drawing the whole
            # page over again. Could not think of a better way to pre-determine
            # if the content will fill up the page, given that it is dependent
            # on the size of the terminal.
            self.nav.flip((len(self._subwindows) - 1))
            self._draw_content()
            return

        if self.nav.cursor_index >= len(self._subwindows):
            # Don't allow the cursor to go over the number of subwindows
            # This could happen if the window is resized and the cursor index is
            # pushed out of bounds
            self.nav.cursor_index = len(self._subwindows) - 1

        # Now that the windows are setup, we can take a second pass through
        # to draw the text onto each subwindow
        for index, (win, data, inverted) in enumerate(self._subwindows):
            if self.nav.absolute_index >= 0 and index == self.nav.cursor_index:
                win.bkgd(str(' '), self.term.attr('Selected'))
                with self.term.theme.turn_on_selected():
                    self._draw_item(win, data, inverted)
            else:
                win.bkgd(str(' '), self.term.attr('Normal'))
                self._draw_item(win, data, inverted)

        self._row += win_n_rows