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Objective
To programmatically create a epub file from text files
Problem
Some of the sub chapters are not shown
Minimal Reproducible Example
from ebooklib import epub
# Create a new EPUB book
book = epub.EpubBook()
# Set metadata
book.set_identifier('id123456')
book.set_title('book1')
book.set_language('en')
book.add_author('John Doe')
# Create a single chapter that includes all content
combined_chapter1 = epub.EpubHtml(title='Chaptor1', file_name='chapters1.xhtml', lang='en')
# Add content with main chapters, sub-chapters, and sub-sub-chapters
combined_chapter1.content = '''
<h1 id="chapter1">Chapter 1: Main Topic</h1>
<p>Introduction to Chapter 1.</p>
<h2 id="chapter1.1">1.1 Sub-Chapter</h2>
<p>Content of sub-chapter 1.1.</p>
<h3 id="chapter1.1.1">1.1.1 Sub-Sub-Chapter</h3>
<p>Detailed content of sub-sub-chapter 1.1.1.</p>
<h2 id="chapter1.2">1.2 Sub-Chapter</h2>
<p>Content of sub-chapter 1.2.</p>
<h3 id="chapter1.2.1">1.2.1 Sub-Sub-Chapter</h3>
<p>Detailed content of sub-sub-chapter 1.2.1.</p>
'''
# Add the combined chapter to the book
book.add_item(combined_chapter1)
# Define Table of Contents with links to all sections
book.toc = (
epub.Link('chapters1.xhtml#chapter1', 'Chapter 1: Main Topic', 'chapter1'),
(
epub.Link('chapters1.xhtml#chapter1.1', '1.1 Sub-Chapter', 'chapter1.1'),
(
(epub.Link('chapters1.xhtml#chapter1.1.1', '1.1.1 Sub-Sub-Chapter', 'chapter1.1.1'),)
),
epub.Link('chapters1.xhtml#chapter1.2', '1.2 Sub-Chapter', 'chapter1.2'),
(
(epub.Link('chapters1.xhtml#chapter1.2.1', '1.2.1 Sub-Sub-Chapter', 'chapter1.2.1'),)
),
),
)
# Add navigation files
book.add_item(epub.EpubNcx())
nav = epub.EpubNav()
book.add_item(nav)
# Set the spine
book.spine = ['nav', combined_chapter1]
# Write the EPUB file
epub.write_epub('my_book_ch1_ch2.epub', book, {})
What the Result Looks Like
Calibre was used. 1.2 Sub-Chapter and 1.2.1 Sub-Sub-Chapter are missing. They should be on the table of contents.
What I tried so far
I googled "ebooklib sub chapter not shown" and checked the first 10 pages in vain.
Environment
- Windows 10
- VSCode 1.95.3
- python 3.12.4
Any assistance would be appreciated.
Objective
To programmatically create a epub file from text files
Problem
Some of the sub chapters are not shown
Minimal Reproducible Example
from ebooklib import epub
# Create a new EPUB book
book = epub.EpubBook()
# Set metadata
book.set_identifier('id123456')
book.set_title('book1')
book.set_language('en')
book.add_author('John Doe')
# Create a single chapter that includes all content
combined_chapter1 = epub.EpubHtml(title='Chaptor1', file_name='chapters1.xhtml', lang='en')
# Add content with main chapters, sub-chapters, and sub-sub-chapters
combined_chapter1.content = '''
<h1 id="chapter1">Chapter 1: Main Topic</h1>
<p>Introduction to Chapter 1.</p>
<h2 id="chapter1.1">1.1 Sub-Chapter</h2>
<p>Content of sub-chapter 1.1.</p>
<h3 id="chapter1.1.1">1.1.1 Sub-Sub-Chapter</h3>
<p>Detailed content of sub-sub-chapter 1.1.1.</p>
<h2 id="chapter1.2">1.2 Sub-Chapter</h2>
<p>Content of sub-chapter 1.2.</p>
<h3 id="chapter1.2.1">1.2.1 Sub-Sub-Chapter</h3>
<p>Detailed content of sub-sub-chapter 1.2.1.</p>
'''
# Add the combined chapter to the book
book.add_item(combined_chapter1)
# Define Table of Contents with links to all sections
book.toc = (
epub.Link('chapters1.xhtml#chapter1', 'Chapter 1: Main Topic', 'chapter1'),
(
epub.Link('chapters1.xhtml#chapter1.1', '1.1 Sub-Chapter', 'chapter1.1'),
(
(epub.Link('chapters1.xhtml#chapter1.1.1', '1.1.1 Sub-Sub-Chapter', 'chapter1.1.1'),)
),
epub.Link('chapters1.xhtml#chapter1.2', '1.2 Sub-Chapter', 'chapter1.2'),
(
(epub.Link('chapters1.xhtml#chapter1.2.1', '1.2.1 Sub-Sub-Chapter', 'chapter1.2.1'),)
),
),
)
# Add navigation files
book.add_item(epub.EpubNcx())
nav = epub.EpubNav()
book.add_item(nav)
# Set the spine
book.spine = ['nav', combined_chapter1]
# Write the EPUB file
epub.write_epub('my_book_ch1_ch2.epub', book, {})
What the Result Looks Like
Calibre was used. 1.2 Sub-Chapter and 1.2.1 Sub-Sub-Chapter are missing. They should be on the table of contents.
What I tried so far
I googled "ebooklib sub chapter not shown" and checked the first 10 pages in vain.
Environment
- Windows 10
- VSCode 1.95.3
- python 3.12.4
Any assistance would be appreciated.
Share Improve this question edited Nov 17, 2024 at 22:08 dixhom asked Nov 17, 2024 at 13:26 dixhomdixhom 3,0534 gold badges23 silver badges39 bronze badges1 Answer
Reset to default 0The solution I use is section objects in place of parent links. From the Section object's source code:
class Section(object):
def __init__(self, title, href=''):
self.title = title
self.href = href
By using href, we turn a plain section title into a working link. We then update your table of contents:
book.toc = (
(epub.Section('Chapter 1: Main Topic', 'chapters1.xhtml#chapter1'),
(
(epub.Section('1.1 Sub-Chapter', 'chapters1.xhtml#chapter1.1'),
(epub.Link('chapters1.xhtml#chapter1.1.1', '1.1.1 Sub-Sub-Chapter', 'chapter1.1.1'),)
),
(epub.Section('1.2 Sub-Chapter', 'chapters1.xhtml#chapter1.2'),
(epub.Link('chapters1.xhtml#chapter1.2.1', '1.2.1 Sub-Sub-Chapter', 'chapter1.1.1'),)
),
)),
)
You can still use regular link objects as section headers if you prefer. Using this solution as reference:
book.toc = (
(epub.Link('chapters1.xhtml#chapter1', 'Chapter 1: Main Topic', 'chapter1'),
(
(epub.Link('chapters1.xhtml#chapter1.1', '1.1 Sub-Chapter', 'chapter1.1'),
(epub.Link('chapters1.xhtml#chapter1.1.1', '1.1.1 Sub-Sub-Chapter', 'chapter1.1.1'),)
),
(epub.Link('chapters1.xhtml#chapter1.2', '1.2 Sub-Chapter', 'chapter1.2'),
(epub.Link('chapters1.xhtml#chapter1.2.1', '1.2.1 Sub-Sub-Chapter', 'chapter1.1.1'),)
),
)),
)
In both cases, each chapter is embedded in a tuple rather than sitting directly in the table of contents.
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