adding chapter 7 source code

Chapter7/multiprocessing/process6.py

@@ -0,0 +1,29 @@
+# process6.py to use Pipe to exchange data
+
+from multiprocessing import Process, Pipe
+
+def mysender (s_conn):
+    s_conn.send({100: "Maths"})
+    s_conn.send({200: "Science"})
+    s_conn.send("BYE")
+    s_conn.close()
+
+def myreceiver(r_conn):
+    while True:
+        msg = r_conn.recv()
+        if msg == "BYE":
+            break
+        print("Received message : ", msg)
+    r_conn.close()
+sender_conn, receiver_conn= Pipe()
+
+p1 = Process(target=mysender, args=(sender_conn, ))
+p2 = Process(target=myreceiver, args=(receiver_conn,))
+
+p1.start()
+p2.start()
+
+p1.join()
+p2.join()
+
+print("Exiting the main process")