把文件夹中的png转成pdf

#!/bin/env python



from PIL import Image
from os.path import realpath
from os import getcwd
from sys import argv
from setproctitle import setproctitle

name = 'pic2pdf'
setproctitle(name)

def pic2pdf(imglist, output):
    """ Create pdf file from pictures
    Args:
        imglist (list): list of pictures path
        output (str): name of the output pdf file
    """
    pathlist = [realpath(img) for img in imglist]
    image = Image.open(pathlist[0])
    images = [Image.open(path) for path in pathlist[1:]]

    image.save(output, "PDF" ,resolution=100.0, save_all=True, append_images=images)

help_text = """pic2pdf
Script using Python Image Library that put a list of pictures into one pdf file.
    SYNTAX:
        pic2pdf pic1 pic2 ... picN file.pdf \n
Copyright (C) 2018 Pellegrino Prevete.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.
"""

if len(argv) == 1 or "--help" in argv:
    print(help_text)
else:
    imglist = argv[1:-1]
    output = argv[-1]
    # pic2pdf(imglist, output1)
    from os import listdir
    list1 = listdir(".")
    # for i in list1:
    #     print i 
    pic2pdf(list1,output)