From 470e490bd1565f6afbf623bab952c7eebdc0a243 Mon Sep 17 00:00:00 2001
From: Yang Zhang <yangzhang@live.com>
Date: Tue, 7 Jan 2020 17:01:44 +0800
Subject: [PATCH] Save optimizer only when it has state

---
 model.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/model.py b/model.py
index 2e53bd1..a2ae5d0 100644
--- a/model.py
+++ b/model.py
@@ -178,6 +178,8 @@ class StaticGraphAdapter(object):
         optim_path = path + ".pdopt"
         optim = {p.name: p for p in filter(
             is_belong_to_optimizer, prog.list_vars())}
+        if not optim:
+            return
         # HACK this is contrived, optimizer state is not the same for
         # static/dynamic graph mode
         optim['__static_graph_only__'] = True
-- 
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