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cmdlineutils

Functions:

  • main –

    A main function for tools that read RDF from files given on commandline

main 

main(target, _help=_help, options='', stdin=True)

A main function for tools that read RDF from files given on commandline or from STDIN (if stdin parameter is true)

Source code in rdflib/extras/cmdlineutils.py 
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def main(target, _help=_help, options="", stdin=True):
    """
    A main function for tools that read RDF from files given on commandline
    or from STDIN (if stdin parameter is true)
    """

    args, files = getopt.getopt(sys.argv[1:], "hf:o:" + options)
    dargs = dict(args)

    if "-h" in dargs:
        _help()
        sys.exit(-1)

    g = rdflib.Graph()

    if "-f" in dargs:
        f = dargs["-f"]
    else:
        f = None

    out: Union[TextIO, codecs.StreamReaderWriter]
    if "-o" in dargs:
        sys.stderr.write("Output to %s\n" % dargs["-o"])
        out = codecs.open(dargs["-o"], "w", "utf-8")
    else:
        out = sys.stdout

    start = time.time()
    if len(files) == 0 and stdin:
        sys.stderr.write("Reading from stdin as %s..." % f)
        g.parse(sys.stdin, format=f)
        sys.stderr.write("[done]\n")
    else:
        size = 0
        for x in files:
            if f is None:
                f = guess_format(x)
            start1 = time.time()
            sys.stderr.write("Loading %s as %s... " % (x, f))
            g.parse(x, format=f)
            sys.stderr.write(
                "done.\t(%d triples\t%.2f seconds)\n"
                % (len(g) - size, time.time() - start1)
            )
            size = len(g)

    sys.stderr.write(
        "Loaded a total of %d triples in %.2f seconds.\n"
        % (len(g), time.time() - start)
    )

    target(g, out, args)