Usage: Mosaic...
Usage: mosaic.py -o output -n n     [-r] img1.png img2.png...       mosaic.py -o output -s n1xn2 [-r] img1.png img2.png...

Options:
  -h, --help            show this help message and exit
  -o FILE, --output=FILE
                        output filename. If several files are created there
                        will be named file_N.ext with the given file.ext
                        parameter and N a  variable number for each output.
  -n INT, --number=INT  number of pages
  -s INTxINT, --shape=INTxINT
                        number of rows x columns example: 3x2 (default:
                        disable)
  -r FLOAT, --ratio=FLOAT
                        page ratio (default : 4./3 landscape)