Re-use n-cores flag and make sure negative value of n_jobs are not permitted

Author: Radonirinaunimi

n3fit/src/evolven3fit/evolve.py

@@ -134,7 +134,7 @@ def _wrap_evolve(pdf, replica):
             dump_evolved_replica(evolved_blocks, usr_path, int(replica.removeprefix("replica_")))
 
         # Choose the number of cores to be the Minimal value
-        nb_cores = min(NUM_CORES, ncores)
+        nb_cores = min(NUM_CORES, abs(ncores))
         Parallel(n_jobs=nb_cores)(
             delayed(_wrap_evolve)(pdf, r) for r, pdf in initial_PDFs_dict.items()
         )

n3fit/src/n3fit/scripts/evolven3fit.py

@@ -82,13 +82,6 @@ def construct_evolven3fit_parser(subparsers):
     parser.add_argument(
         "-d", "--dump", type=pathlib.Path, default=None, help="Path where the EKO is dumped"
     )
-    parser.add_argument(
-        "-n",
-        "--ncores",
-        type=int,
-        default=1,
-        help="Specify the number of cores to parallelize evolution",
-    )
     parser.add_argument(
         "-f",
         "--force",
@@ -176,7 +169,7 @@ def main():
             args.force,
             eko_path,
             None,
-            args.ncores,
+            args.n_cores,
         )
     else:
         # If we are in the business of producing an eko, do some checks before starting: