import os
from PyPDF2.pdf import PdfFileReader, PdfFileWriter

# 复制pdf，除去最后一页
def createNewBooks(pdf_file, output_file, output_dir):
    if not os.path.exists(output_dir):
        os.mkdir(output_dir)  
        
    input_stream = open(pdf_file, 'rb')
    
    pdf_input = PdfFileReader(input_stream)
    pdf_output = PdfFileWriter()
    
    page = 0
    pages = pdf_input.getNumPages() - 1
    
    while page < pages:
        pdf_output.addPage(pdf_input.getPage(page))
        page += 1
    
    outputfilename = output_dir + '/' + output_file
    output_stream = open(outputfilename, 'wb')
    pdf_output.write(output_stream) 
    output_stream.close()
    input_stream.close()

if __name__ == '__main__':
    createNewBooks("C:\\Users\\Pro1\\Downloads\\1.pdf", "1_copy.pdf", "C:\\Users\\Pro1\\Downloads")