1. The structuring_pdf.py script is available in GitHub here: https://github.com/PacktPublishing/Python-Automation-Cookbook/blob/master/Chapter05/structuring_pdf.py. The most relevant bits are displayed here:

import fpdf
from random import randint

class StructuredPDF(fpdf.FPDF):
    LINE_HEIGHT = 5

    def footer(self):
        self.set_y(-15)
        self.set_font('Times', 'I', 8)
        page_number = 'Page {number}/{{nb}}'.format(number=self.page_no())
        self.cell(0, self.LINE_HEIGHT, page_number, 0, 0, 'R')

    def chapter(self, title, paragraphs):
        self.add_page()
        link = self.title_text(title)
        page = self.page_no()
        for paragraph in paragraphs:
            self.multi_cell(0, self.LINE_HEIGHT, paragraph)
            self.ln()

        return link, page

    def title_text(self, title):
        self.set_font('Times', 'B', 15)
        self.cell(0, self.LINE_HEIGHT, title)
        self.set_font('Times', '', 12)
        self.line(10, 17, 110, 17)
        link = self.add_link()
        self.set_link(link)
        self.ln()
        self.ln()

        return link

    def get_full_line(self, head, tail, fill):
        ...

    def toc(self, links):
        self.add_page()
        self.title_text('Table of contents')
        self.set_font('Times', 'I', 12)

        for title, page, link in links:
            line = self.get_full_line(title, page, '.')
            self.cell(0, self.LINE_HEIGHT, line, link=link)
            self.ln()


LOREM_IPSUM = ...

def main():
    document = StructuredPDF()
    document.alias_nb_pages()
    links = []
    num_chapters = randint(5, 40)
    for index in range(1, num_chapters):
        chapter_title = 'Chapter {}'.format(index)
        num_paragraphs = randint(10, 15)
        link, page = document.chapter(chapter_title,
                                      [LOREM_IPSUM] * num_paragraphs)
        links.append((chapter_title, page, link))

    document.toc(links)
    document.output('report.pdf')

2. Run the script, and it will generate the report.pdf file, which contains some chapters and a table of contents. Note that it generates some randomness, so the specific numbers will vary each time you run it:

$ python3 structuring_pdf.py

3. Check the result. Here is a sample:

Check the table of contents at the end: