update from Atlas with major reorg

attic/concurrency/parallel/lelo_ex.py

@@ -0,0 +1,24 @@
+import os
+from time import sleep, time
+
+from lelo import parallel
+
+DELAY = .2
+
+@parallel
+def loiter(serial, delay):
+    pid = os.getpid()
+    print('%2d pid = %d' % (serial, pid))
+    sleep(delay)
+    return pid
+
+t0 = time()
+
+results = []
+for i in range(15):
+    res = loiter(i, DELAY)
+    results.append(res)
+
+print('Processes used: ', list(set(results)))
+
+print('### Elapsed time: %0.2f' % (time() - t0))