bugfix

README.md

@@ -31,7 +31,7 @@ payload = {
 	'prompt':'gagagag'
 }
 x = await longtasks.submit_task(payload)
-# x is a dict with has a 'task_id' key
+# x is a dict with a 'task_id' key, it must be used to query the status of task
 return x
 ```
 
@@ -39,6 +39,14 @@ query task status
 ```
 taskid = 'mytaskid'
 task_status = await longtasks.get_status(taskid)
+## task_status is a dict
+# {
+#	"status": one of "SUCCEEDED", "FAILED", "PENDING", "RUNNING"
+#	"result": process_task method returned
+#	"created_at": task created time
+#	"started_at": task begin running time
+#	"finished_at": task finished time, success or failed
+# }
 return task_status
 ```