adding chapter 7 source code

Chapter7/multiprocessing/process5.py

@@ -0,0 +1,26 @@
+# process5.py to use queue to exchange data
+
+from multiprocessing import Process
+from multiprocessing import Queue
+
+def copy_data (list, myqueue):
+    for num in list:
+        myqueue.put(num)
+
+def output(myqueue):
+    while not myqueue.empty():
+        print(myqueue.get())
+
+mylist = [2, 5, 7]
+myqueue = Queue()
+
+p1 = Process(target=copy_data, args=(mylist, myqueue))
+p2 = Process(target=output, args=(myqueue,))
+
+p1.start()
+p1.join()
+p2.start()
+p2.join()
+
+print("Queue is empty: ",myqueue.empty())
+print("Exiting the main process")