Update batch request with content to reflect using dictionaries instead of lists

Author: shemogumbe

samples/batch_requests/batch_request_with_content.py

@@ -47,7 +47,10 @@
 batch_request_item2 = BatchRequestItem(request_information=request_info2)
 
 # Create a batch request content
-batch_request_content = [batch_request_item1, batch_request_item2]
+batch_request_content = {
+    batch_request_item1.id: batch_request_item1,
+    batch_request_item2.id: batch_request_item2
+}
 batch_content = BatchRequestContent(batch_request_content)