Python 按特定顺序合并pdf文件

此代码按字母顺序合并所有pdf

# pdf_merger2.py
import glob
from PyPDF2 import PdfFileMerger
os.chdir(r"auf_comp")
def merger(output_path, input_paths):
    pdf_merger = PdfFileMerger()
    file_handles = []
    
    for path in input_paths:
        pdf_merger.append(path)
        
    with open(output_path, 'wb') as fileobj:
        pdf_merger.write(fileobj)
        pdf_merger.close()
        
if __name__ == '__main__':
    paths = glob.glob('*.pdf')
    paths.sort()
    merger('data.pdf', paths)

如何按特定顺序合并文件？比如： 2.pdf 5.pdf 3.pdf 等等