more stuff

uebung_03/exercise_02/exercise_02a.py

@@ -0,0 +1,11 @@
+from mpi4py import MPI
+
+comm = MPI.COMM_WORLD
+rank = comm.Get_rank()
+
+if rank == 0:
+    data = "Hello, from process 0!"
+    comm.send(data, dest=1)
+elif rank == 1:
+    received_data = comm.recv(source=0)
+    print(f"Process 1 received: {received_data}")

uebung_03/exercise_02/exercise_02b.py

@@ -0,0 +1,23 @@
+from mpi4py import MPI
+
+comm = MPI.COMM_WORLD
+rank = comm.Get_rank()
+size = comm.Get_size()
+
+send_data = f"Hello, from process {rank}!"
+print(f"I am rank {rank}. I send to process {(rank+1)}")
+print(f"I am rank {rank}. I receive from process {(rank-1)}")
+
+if rank == size-1:
+    comm.send(send_data, dest=(0))
+else:
+    comm.send(send_data, dest=(rank + 1))
+
+recv_data = ""
+
+if rank == 0:
+    recv_data= comm.recv(source=(size - 1))
+else:
+    recv_data= comm.recv(source=(rank - 1))
+
+print(f"I am rank {rank}. I have received: {recv_data}")