Use lower-case wait

Author: mlouhivu

demos/mpi-isend.py

@@ -15,14 +15,14 @@ def calculate_something(rank):
     data = arange(size, dtype=float) * (rank + 1)
     req = comm.Isend(data, dest=1)    # start a send
     calculate_something(rank)         # .. do something else ..
-    req.Wait()                        # wait for send to finish
+    req.wait()                        # wait for send to finish
     # safe to read/write data again
 
 elif rank == 1:
     data = empty(size, float)
     req = comm.Irecv(data, source=0)  # post a receive
     calculate_something(rank)         # .. do something else ..
-    req.Wait()                        # wait for send to finish
+    req.wait()                        # wait for receive to finish
     # data is now ready for use
 
 if rank == 1: