added missing random.py

d2o/random.py

+# -*- coding: utf-8 -*-
+
+import numpy as np
+
+from d2o.config import configuration as gc,\
+                       dependency_injector as gdi
+
+MPI = gdi[gc['mpi_module']]
+comm = gc['default_comm']
+rank = comm.rank
+
+
+def seed(seed=None):
+    seed = rank if seed is None else np.uint32(seed) + rank
+    np.random.seed(seed)