2025-12-01

2026-03-17 14:58:51 -06:00
parent 183e865f8b
commit 4b82b57113
6846 changed files with 954887 additions and 162606 deletions
@@ -0,0 +1,77 @@
+from __future__ import annotations
+
+import codecs
+import getopt
+import sys
+import time
+from typing import TextIO, Union
+
+import rdflib
+from rdflib.util import guess_format
+
+
+def _help():
+    sys.stderr.write(
+        """
+program.py [-f <format>] [-o <output>] [files...]
+Read RDF files given on STDOUT - does something to the resulting graph
+If no files are given, read from stdin
+-o specifies file for output, if not given stdout is used
+-f specifies parser to use, if not given it is guessed from extension
+
+"""
+    )
+
+
+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)