covert binary file to base64 and save

tobase64.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#author: shiweifu <shiweifu@gmail.com>

import base64
import argparse

def to_base64(data):
  return base64.b64encode(data).decode()

def each_files(fun, *files):
  s = [fun(open(f, "rb").read()) for f in files]  
  return s

def main():
  """
    usage: python3 tobase64.py -o dst_file_with_base64 [imgpath, imgpath, ....]
  """
  parser = argparse.ArgumentParser()
  parser.add_argument('filenames', nargs='*')
  parser.add_argument('-o')
  args = parser.parse_args()
  dst_file = args.o
  s = each_binary_files(to_base64, *args.filenames)
  open(dst_file, "w").write("\n".join(s))

if __name__ == '__main__':
    main()