SO Question #7010316

#!/usr/bin/python2.7

import os
import glob

def process_file(_, path, filelist):
    input_param = " ".join('"' + x + '"' for x in glob.glob(os.path.join(path, "*.pdf")))
    output_param = '"' + os.path.join(path, os.path.basename(path) + ".pdf") + '"'
    cmd = "pdftk " + input_param + " cat output " + output_param
    print cmd
    #os.system(cmd)

def files_recursively(topdir):
    os.path.walk(os.path.realpath(topdir), process_file, ())

if  __name__ == "__main__":
    files_recursively(os.getcwd())