adding chapter 7 source code

Chapter7/asyncio/asyncio2.py

@@ -0,0 +1,17 @@
+#asyncio2.py to build and run coroutines in parallel
+import asyncio
+import time
+
+async def say(delay, msg):
+    await asyncio.sleep(delay)
+    print(msg)
+
+async def main ():
+    task1 = asyncio.create_task( say(1, 'Good'))
+    task2 = asyncio.create_task( say(1, 'Morning'))
+    print("Started at ", time.strftime("%X"))
+    await task1
+    await task2
+    print("Stopped at ", time.strftime("%X"))
+
+asyncio.run(main())