如何使用python进行pdf文件分割

import osfrom pyPdf import PdfFileWriter, PdfFileReaderdef split(pdf_file, delta, output_dir):  if not os.path.exists(output_dir):    os.makedirs(output_dir)  if not os.path.exists(pdf_file):    return  print('----------参数信息---------------')  print('File:' + pdf_file)  print('PageNums:' + str(delta))  print('Dest:' + output_dir)  print('-----------pdf开始切分-----------')  file_name = pdf_file.split('/')[-1].split('.')[0]  output_dir = os.path.join(out_dir, file_name)  if not os.path.exists(output_dir):    os.mkdir(output_dir)  input_stream = file(pdf_file, 'rb')  pdf_input = PdfFileReader(input_stream)  page_count = pdf_input.getNumPages()  sum_page_count = int(page_count / (delta * 1.0))  remind_page = page_count % delta  for i in range(0, sum_page_count + 1):    start = i * delta    end = (i + 1) * delta    pdf_out = PdfFileWriter()    file_path = os.path.join(output_dir, os.path.split(pdf_file)[1]) #    if i < sum_page_count:      full_file_name = file_name + str(start + 1) + '-' + str(end) + ".pdf"      file_path = os.path.join(output_dir, full_file_name)      print(full_file_name + '切分完成')      for j in range(start, end):        page = pdf_input.getPage(j)        pdf_out.addPage(page)    else:      full_file_name = file_name + str(start + 1) + '-' + str(start + remind_page) + ".pdf"      file_path = os.path.join(output_dir, full_file_name)      print(full_file_name + '切分完成')      for j in range(delta * (sum_page_count), page_count):        page = pdf_input.getPage(j)        pdf_out.addPage(page)    out_stream = file(file_path, 'wb')    pdf_out.write(out_stream)    out_stream.close()  input_stream.close()  print('-----------pdf切分完成-----------')if __name__ == '__main__':  import sys    #python splitPdf.py /Users/xxxxx/Downloads/UNIX网络编程卷1：套接字联网API(第3版).pdf 180 /Users/xxxxx/Documents/output  try:    pdf_path = sys.argv[1]    page_count = int(sys.argv[2])    out_dir = sys.argv[3]    split(pdf_path, page_count, out_dir)  except:    pass

$ python splitPdf.py /Users/xxxxx/Downloads/UNIX网络编程卷1：套接字联网API(第3版).pdf 180 /Users/xxxxx/Documents/output----------参数信息---------------File:/Users/xxxxx/Downloads/UNIX网络编程卷1：套接字联网API(第3版).pdfPageNums:180Dest:/Users/xxxxx/Documents/output-----------pdf开始切分-----------UNIX网络编程卷1：套接字联网API(第3版)1-180.pdf切分完成UNIX网络编程卷1：套接字联网API(第3版)181-360.pdf切分完成UNIX网络编程卷1：套接字联网API(第3版)361-540.pdf切分完成UNIX网络编程卷1：套接字联网API(第3版)541-720.pdf切分完成UNIX网络编程卷1：套接字联网API(第3版)721-823.pdf切分完成-----------pdf切分完成-----------