Add items/keys/values to TasksProxy for cleanup_old_tasks

app.py.final

@@ -61,6 +61,12 @@ class TasksProxy:
         return _TaskDict(key)
     def __contains__(self, key):
         return key in _load_tasks()
+    def items(self):
+        return _load_tasks().items()
+    def keys(self):
+        return _load_tasks().keys()
+    def values(self):
+        return _load_tasks().values()
     def pop(self, key, *args):
         with _task_lock:
             tasks = _load_tasks()