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
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.load(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.load(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)
def parse_and_serialize(input_files, input_format, guess,
outfile, output_format, ns_bindings,
store_conn=STORE_CONNECTION, store_type=STORE_TYPE):
store = plugin.get(store_type, Store)()
store.open(store_conn)
graph = Graph(store)
for prefix, uri in ns_bindings.items():
graph.namespace_manager.bind(prefix, uri, override=False)
for fpath in input_files:
use_format, kws = _format_and_kws(input_format)
if fpath == '-':
fpath = sys.stdin
elif not input_format and guess:
use_format = guess_format(fpath) or DEFAULT_INPUT_FORMAT
graph.parse(fpath, format=use_format, **kws)
if outfile:
output_format, kws = _format_and_kws(output_format)
graph.serialize(
destination=outfile, format=output_format, base=None, **kws)
store.rollback()
