usage: stepic [-h] [--version] [--debug] [-d] [-e] [-f FORMAT] [-i FILE]
              [-t FILE] [-o FILE]

Hide data in an image, or read hidden data from an image.

optional arguments:
  -h, --help            show this help message and exit
  --version             show program's version number and exit
  --debug
  -d, --decode          given an image, write out the hidden data file
  -e, --encode          given an image and data file, write out a new image
                        file with the data hidden in it
  -f FORMAT, --format FORMAT
                        output image format (optional)
  -i FILE, --image-in= FILE
                        read in image FILE for decoding or encoding
  -t FILE, --data-in= FILE
                        read in data FILE for encoding
  -o FILE, --out= FILE  write out to FILE, data when decoding, image when
                        encoding