nproc: Add nproc.py

Author: Expertcoderz

src/nproc.py

@@ -0,0 +1,40 @@
+#!/usr/bin/python3
+
+import os
+from optparse import OptionParser
+
+
+def nproc(opts):
+    n_cpus = os.cpu_count() if opts.all else os.process_cpu_count()
+
+    print(max(n_cpus - opts.ignore, 1))
+
+
+if __name__ == "__main__":
+    parser = OptionParser(
+        usage="Usage: %prog [OPTION]...",
+        description="Print the number of processing units available to the process.",
+        add_help_option=False,
+    )
+    parser.add_option("--help", action="help", help="show usage information and exit")
+
+    parser.add_option(
+        "--all",
+        action="store_true",
+        help="print the total number of installed processors",
+    )
+
+    parser.add_option(
+        "--ignore",
+        type="int",
+        default=0,
+        metavar="N",
+        help="exclude up to N processors if possible",
+    )
+
+    opts, args = parser.parse_args()
+
+    if args:
+        parser.error(f"extra operand '{args[0]}'")
+
+    nproc(opts)