git clone https://github.com/KHPROG55/a1z26-cipher

$ python a1z26-cipher.py
usage: a1z26-decrypter.py [-h] [-e ENCRYPT [ENCRYPT ...]]
                          [-d DECRYPT [DECRYPT ...]] [-v]

optional arguments:
  -h, --help            show this help message and exit
  -e ENCRYPT [ENCRYPT ...], --encrypt ENCRYPT [ENCRYPT ...]
                        Encrypt one string or list of strings
                        from stdin or file(s)
  -d DECRYPT [DECRYPT ...], --decrypt DECRYPT [DECRYPT ...]
                        Decrypt one string or list of strings
                        from stdin or file(s)
  -v, --version         show program's version number and
                        exit

$ # encrypt a string
$ python a1z26-cipher.py -e testing
20 5 19 20 9 14 7
$ # decrypt an encrypted string
$ python a1z26-cipher.py -d 20 5 19 20 9 14 7
testing
$ # encrypt a string from file, inside the file > "testing"
$ python a1z26-cipher.py -e filename.txt
20 5 19 20 9 14 7
$ # decrypt a string from file, inside the file > "20 5 19 20 9 14 7"
$ python a1z26-cipher.py -d filename.txt
testing
$ # encrypt from multiple files
$ python a1z26-cipher.py -e file1.txt file2.txt ...
output of file1.txt
output of file2.txt
...
$ # decrypt from multiple files
$ python a1z26-cipher.py -d file1.txt file2.txt ...
output of file1.txt
output of file2.txt
...