如何用Python批量拆分目录中所有多页PDF为单页文件？

Great job getting the single-file PDF splitter working! Extending this to handle all PDFs in a directory is straightforward—we just need to add a loop to iterate through every PDF file and run your existing pdf_splitter function on each one.

Here's the updated code that does exactly that:

# pdf_splitter.py
import os
from PyPDF2 import PdfFileReader, PdfFileWriter

def pdf_splitter(path):
    fname = os.path.splitext(os.path.basename(path))[0]
    # Optional: Create a subdirectory to store split pages (keeps things organized)
    output_dir = f"{fname}_pages"
    os.makedirs(output_dir, exist_ok=True)
    
    pdf = PdfFileReader(path)
    for page in range(pdf.getNumPages()):
        pdf_writer = PdfFileWriter()
        pdf_writer.addPage(pdf.getPage(page))
        # Save pages to the dedicated subdirectory
        output_filename = os.path.join(output_dir, f"{fname}_page_{page+1}.pdf")
        with open(output_filename, 'wb') as out:
            pdf_writer.write(out)
        print(f'Created: {output_filename}')

def batch_split_pdfs(directory):
    # Loop through all files in the target directory
    for filename in os.listdir(directory):
        # Only process PDF files (case-insensitive check)
        if filename.lower().endswith('.pdf'):
            # Skip already split pages (optional, remove if you want to reprocess all PDFs)
            if '_page_' not in filename:
                file_path = os.path.join(directory, filename)
                print(f'\nProcessing {filename}...')
                pdf_splitter(file_path)

if __name__ == '__main__':
    # Use the current working directory by default
    # Replace with your target path if needed, e.g., 'C:/Documents/MyPDFs'
    target_directory = os.getcwd()
    batch_split_pdfs(target_directory)

Key Improvements & Notes: #

• Batch Processing: The batch_split_pdfs function scans your target directory and processes every PDF file it finds.
• Case Insensitivity: Checks for .pdf or .PDF extensions so no files are missed.
• Organized Output: Added a subdirectory for each original PDF's split pages (e.g., w9.pdf gets a w9_pages folder with all its single-page files). Remove this part if you prefer all files in the root directory.
• Avoid Reprocessing: Skips files that already have _page_ in their name (so you don't split the split pages by accident). Remove that check if you want to process every PDF regardless.

To use this:

1. Save the updated code as pdf_splitter.py
2. Place it in the directory with your PDFs (or update target_directory to point to your PDF folder)
3. Run the script—all your PDFs will be split into single-page files automatically!

内容的提问来源于stack exchange，提问作者Bob Maiers