用python写一个pdf转换器

好的，下面是一个基于Python的PDF转换器的示例代码：

import os
import glob
from pdf2image import convert_from_path
from PIL import Image

def pdf_to_jpg(pdf_path):
    # 将PDF转换为图像
    pages = convert_from_path(pdf_path)

    # 创建文件夹以保存图像
    image_folder = os.path.splitext(pdf_path)[0]
    if not os.path.exists(image_folder):
        os.makedirs(image_folder)

    # 保存每一页图像
    for i, page in enumerate(pages):
        image_path = os.path.join(image_folder, f"{i+1}.jpg")
        page.save(image_path, 'JPEG')

    return image_folder

def jpg_to_pdf(image_folder):
    # 将图像转换为PDF
    image_paths = sorted(glob.glob(os.path.join(image_folder, "*.jpg")))
    pdf_path = os.path.join(image_folder, "output.pdf")

    with Image.open(image_paths[0]) as first_image:
        pdf_width, pdf_height = first_image.size

    with Image.open(image_paths[0]) as first_image:
        pdf = Image.new('RGB', (pdf_width, pdf_height * len(image_paths)))

        # 将所有图像添加到单个PDF文件中
        for i, image_path in enumerate(image_paths):
            with Image.open(image_path) as image:
                pdf.paste(image, (0, i * pdf_height))

        # 保存PDF文件
        pdf.save(pdf_path, "PDF", resolution=100.0, save_all=True)

    return pdf_path

这个示例代码使用pdf2image库将PDF文件转换为图像，并使用PIL库将图像转换为PDF文件。您可以使用此示例作为起点，根据您的需求进行修改。