Parse .epub file

Description

This script extracts unique words from an EPUB file that match a specific regex pattern and saves them to a CSV file. It performs the following steps:

1. Extract Text from EPUB:

   • The script opens the EPUB file as a ZIP archive and iterates through its contents.
   • It processes only .html and .xhtml files, extracting text using BeautifulSoup.
   • A regex pattern is applied to identify words starting with "dé"/"de" or "ré"/"re", capturing variations with accented characters.
   • The extracted words are stored in a set to ensure uniqueness.

2. Save to CSV:

   • The unique words are sorted alphabetically and written to a CSV file with a header.

3. Execution:

   • The script runs with predefined file names (your-file.epub as input and output.csv as output).
   • After execution, it prints the total count of unique words saved.

This script is useful for linguistic analysis, specifically identifying words with certain prefixes in an EPUB file.

Code

import zipfile
import re
import csv
from bs4 import BeautifulSoup

# Define the correct regex pattern
regex_pattern = r"\b(?:d[ée]|r[ée])[a-zA-Zà-ÿ]+\b"

def extract_epub_text(epub_path):
    """Extracts text from all HTML/XHTML files inside the EPUB."""
    unique_words = set()  # Use a set to store unique words

    with zipfile.ZipFile(epub_path, 'r') as epub:
        for file_name in epub.namelist():
            if file_name.endswith('.html') or file_name.endswith('.xhtml'):
                with epub.open(file_name) as f:
                    soup = BeautifulSoup(f.read(), 'html.parser')
                    words = set(re.findall(regex_pattern, soup.get_text(), re.IGNORECASE))
                    unique_words.update(words)  # Add words to the set to ensure uniqueness

    return unique_words

def save_to_csv(words, output_file):
    """Saves unique words to a CSV file."""
    with open(output_file, mode='w', newline='', encoding='utf-8') as file:
        writer = csv.writer(file)
        writer.writerow(["Word"])  # Header
        for word in sorted(words):  # Sort alphabetically for readability
            writer.writerow([word])

# Input and output file names
epub_file = "your-file.epub"
output_csv = "output.csv"

# Extract words and save to CSV
unique_words = extract_epub_text(epub_file)
save_to_csv(unique_words, output_csv)

print(f"Extraction complete! {len(unique_words)} unique words saved to {output_csv}.")