Fixed promisify dependency

Author: syrusakbary

graphql/execution/executor.py

@@ -4,7 +4,7 @@
 import sys
 
 from six import string_types
-from promise import Promise, promise_for_dict, promisify, is_thenable
+from promise import Promise, promise_for_dict, is_thenable
 
 from ..error import GraphQLError, GraphQLLocatedError
 from ..pyutils.default_ordered_dict import DefaultOrderedDict
@@ -253,7 +253,7 @@ def complete_value(exe_context, return_type, field_asts, info, result):
     # If field type is NonNull, complete for inner type, and throw field error if result is null.
 
     if is_thenable(result):
-        return promisify(result).then(
+        return Promise.resolve(result).then(
             lambda resolved: complete_value(
                 exe_context,
                 return_type,

graphql/execution/executors/asyncio.py

@@ -2,7 +2,7 @@
 
 from asyncio import Future, get_event_loop, iscoroutine, wait
 
-from promise import promisify
+from promise import Promise
 
 try:
     from asyncio import ensure_future
@@ -49,5 +49,5 @@ def execute(self, fn, *args, **kwargs):
         if isinstance(result, Future) or iscoroutine(result):
             future = ensure_future(result, loop=self.loop)
             self.futures.append(future)
-            return promisify(future)
+            return Promise.resolve(future)
         return result