python合并多个PDF到一个PDF

python合并多个PDF到一个PDF

pycharm为例，先安装 PyPDF2 这个库，然后将所有需要合并的pdf ，比如按照 1 2 3 4 的名称，放入和下列代码一样的目录下，执行下列代码即可，会生成一个 merged.pdf

合并后的内容顺序，也会按照 1 2 3 4 的顺序。

import PyPDF2
import os
import re


def main():
    # find all the pdf files in current directory.
    mypath = os.getcwd()
    pattern = r"\.pdf$"
    file_names_lst = [mypath + "\\" + f for f in os.listdir(mypath) if re.search(pattern, f, re.IGNORECASE)
    and not re.search(r'Merged.pdf',f)]

    # merge the file.
    opened_file = [open(file_name,'rb') for file_name in file_names_lst]
    pdfFM = PyPDF2.PdfFileMerger()
    for file in opened_file:
        pdfFM.append(file)

    # output the file.
    with open(mypath + "\\Merged.pdf", 'wb') as write_out_file:
        pdfFM.write(write_out_file)

    # close all the input files.
    for file in opened_file:
        file.close()

if __name__ == '__main__':
    main()