Use async def instead of the deprecated asyncio.coroutine

graphql_server/flask/graphqlview.py

@@ -27,6 +27,7 @@
     GraphiQLOptions,
     render_graphiql_sync,
 )
+from graphql_server.utils import wrap_in_async
 
 
 class GraphQLView(View):
@@ -126,7 +127,7 @@ async def get_async_execution_results():
                     *(
                         ex
                         if ex is not None and is_awaitable(ex)
-                        else asyncio.coroutine(lambda: ex)()
+                        else wrap_in_async(lambda: ex)()
                         for ex in execution_results
                     )
                 )