Convert and print JSON.

    Argument:

        prs:  parser object of argparse

def parse_show(prs):
    """Convert and print JSON.

    Argument:

        prs:  parser object of argparse
    """
    prs_show = prs.add_parser('show',
                              help='show converted JSON')
    set_option(prs_show, 'infile')
    prs_show.set_defaults(func=show)