Add streaming notes to update example file

test/examples/src/update_doc.py

@@ -21,6 +21,12 @@
         doc_id=example_doc_id
     ).get_result()
 
+    # Note: for response byte stream use:
+    # document_as_byte_stream = client.get_document_as_stream(
+    #     db=example_db_name,
+    #     doc_id=example_doc_id
+    # ).get_result()
+
     #  Add Bob Smith's address to the document
     document["address"] = "19 Front Street, Darlington, DL5 1TY"
 
@@ -34,6 +40,12 @@
         document=document
     ).get_result()
 
+    # Note: for request byte stream use:
+    # update_document_response = client.post_document(
+    #     db=example_db_name,
+    #     document=document_as_byte_stream
+    # ).get_result()
+
     # Keep track with the revision number of the document object:
     document["_rev"] = update_document_response["rev"]
     print(f'You have updated the document:\n' +
@@ -43,4 +55,4 @@
     if ae.code == 404:
         print('Cannot delete document because either ' +
               f'"{example_db_name}" database or "{example_doc_id}" ' +
-              'document was not found.')
+              'document was not found.')