PDFtoDXF.py

# !!!! Requires 'inkscape' and 'pdf2svg' to be in system path !!!!
# Tested with inkscape v1.2, pdf2svg v0.2.3_6, and PyPDF2 v3.0.1

import os
import subprocess
from PyPDF2 import PdfReader
import argparse

def extract_pages_as_svg(pdf_file, output_dir, pages=None):
    with open(pdf_file, 'rb') as file:
        pdf = PdfReader(file)
        if pages is None:
            pages = list(range(len(pdf.pages)))

    for i in pages:
        output_file = os.path.join(output_dir, f'{os.path.splitext(os.path.basename(pdf_file))[0]}_{i+1}.svg')
        subprocess.run(['pdf2svg', pdf_file, output_file, str(i+1)], check=True)

def convert_svg_to_dxf(svg_file, dxf_file):
    subprocess.run(['inkscape', svg_file, '--export-type=dxf', '-o', dxf_file], check=True)

def extract_and_convert(pdf_file, output_dir, pages=None):
    if not os.path.exists(output_dir):
        os.makedirs(output_dir)

    extract_pages_as_svg(pdf_file, output_dir, pages)
    svg_files = [f for f in os.listdir(output_dir) if f.endswith('.svg')]
    
    for svg_file in svg_files:
        dxf_file = os.path.join(output_dir, f'{os.path.splitext(svg_file)[0]}.dxf')
        convert_svg_to_dxf(os.path.join(output_dir, svg_file), dxf_file)

def parse_pages_arg(pages_arg):
    pages = []
    for part in pages_arg.split(','):
        if '-' in part:
            start, end = map(int, part.split('-'))
            pages.extend(range(start - 1, end))
        else:
            pages.append(int(part) - 1)
    return pages

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description='Extract SVGs from PDF and convert to DXF.')
    parser.add_argument('pdf_file', type=str, help='Input PDF file')
    parser.add_argument('output_dir', type=str, help='Output directory')
    parser.add_argument('-p', '--pages', type=str, help='Comma-separated page numbers or page ranges to extract (1-indexed)', default=None)
    args = parser.parse_args()

    pages = parse_pages_arg(args.pages) if args.pages is not None else None
    extract_and_convert(args.pdf_file, args.output_dir, pages)