fixed rrule bug in output format

body_create.py

@@ -42,7 +42,7 @@ def rrule_former(class_obj):
     ret = rrule.rrule(freq=rrule.WEEKLY,dtstart=start,wkst=rrule.SU,until=end,byweekday=days)
     ret_str = str(ret).split('\n')[-1]
     ret_str=re.sub(r'(UNTIL=[^;]+)',r'\1Z',ret_str)
-    return 'RRULE:{}'.format(ret_str)
+    return '{}'.format(ret_str)
 
 def create_body(class_obj,is_lab = False):
     if not is_lab:
@@ -73,7 +73,9 @@ def json_dump(obj):
 
 def create_event(class_list):
     for class_obj in class_list:
-        body,lab_body = create_body(class_obj)
+        out = create_body(class_obj)
+        if out:
+            body,lab_body = out
             yield body
             if lab_body:
                 yield lab_body