Include suggestions in produce.py for callback and last id

docs/site/examples/python/produce.py

@@ -47,8 +47,8 @@ producer.send(
     id=1,  # message number. Should be unique and ordered.
     exposed_path="processed/test_file",  # name of the file. Should be unique, or it will be overwritten
     data=b"hello",  # binary data
-    callback=callback,
-)  # callback
+    callback=callback,  # this is called after the asynchronous send operation finishes
+)
 # send snippet_end
 # send data in loop
 
@@ -63,6 +63,6 @@ producer.wait_requests_finished(
 # you may want to mark the stream as finished
 producer.send_stream_finished_flag(
     stream="default",  # name of the stream. If you didn't specify the stream in 'send', it would be 'default'
-    id=1,
+    last_id=1,
 )  # the number of the last message in the stream
 # finish snippet_end