from PyPDF2 import PdfFileReader, PdfFileMerger, PdfFileWriter

def merge(input1,input2,output):

    file_merger = PdfFileMerger()

    file_merger.append(input1)

    file_merger.append(input2)

    file_merger.write(output)

def split(input,output,start_page, end_page):

    try:

        read_file = input

        fp_read_file = open(read_file, 'rb')

        pdf_input = PdfFileReader(fp_read_file)  # 将要分割的PDF内容格式话

        page_count = pdf_input.getNumPages()  # 获取PDF页数

        print("该文件共有{}页".format(page_count))  # 打印页数

        try:

            print(f'开始分割{start_page}页-{end_page}页，保存为{output}......')

            pdf_output = PdfFileWriter()  # 实例一个 PDF文件编写器

            for i in range(start_page, end_page):

                pdf_output.addPage(pdf_input.getPage(i))

            with open(output, 'wb') as sub_fp:

                pdf_output.write(sub_fp)

            print(f'完成分割{start_page}页-{end_page}页，保存为{output}!')

        except IndexError:

            print(f'分割页数超过了PDF的页数')

        # fp.close()

    except Exception as e:

        print(e)

if __name__ == '__main__':

    input1 = open(r"1.pdf", "rb") #打开第一个PDF文件

    input2 = open(r"2.pdf", "rb") #打开第二个PDF文件

    output=r'submit.pdf'

    merge(input1,input2,output)

    # input = r"submit.pdf"  #打开第二个PDF文件

    # output= r'1.pdf'

    # split(input,output,9,35) # start 起始页 从0 开始算，end 是尾页从1开始算