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-rw-r--r--src/server/model/graph.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/server/model/graph.py b/src/server/model/graph.py
index b23f807f..da38a652 100644
--- a/src/server/model/graph.py
+++ b/src/server/model/graph.py
@@ -171,6 +171,9 @@ class Topo_Diff(object):
def len__l_id_rm(self):
return len(self.link_id_set_rm)
+ def is_empty(self):
+ return self.len__n_add() + self.len__n_id_rm() + self.len__l_add() + self.len__l_id_rm() == 0
+
def to_json_dict(self):
ret = {k: getattr(self, k) for k in ['link_id_set_rm',
'node_id_set_rm',