From 9d5b417f07cc189cd0d5517603f3872537c54af8 Mon Sep 17 00:00:00 2001
From: Yixiao Fang <36138628+fangyixiao18@users.noreply.github.com>
Date: Sat, 19 Nov 2022 10:39:19 +0800
Subject: [PATCH] [Fix] Fix T_max may be None in CosineAnnealingParamScheduler
(#735)
---
mmengine/optim/scheduler/param_scheduler.py | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/mmengine/optim/scheduler/param_scheduler.py b/mmengine/optim/scheduler/param_scheduler.py
index 7b4ca4ff..31101dce 100644
--- a/mmengine/optim/scheduler/param_scheduler.py
+++ b/mmengine/optim/scheduler/param_scheduler.py
@@ -639,7 +639,7 @@ class CosineAnnealingParamScheduler(_ParamScheduler):
@classmethod
def build_iter_from_epoch(cls,
*args,
- T_max,
+ T_max=None,
begin=0,
end=INF,
by_epoch=True,
@@ -653,7 +653,8 @@ class CosineAnnealingParamScheduler(_ParamScheduler):
f'`epoch_length` must be a positive integer, ' \
f'but got {epoch_length}.'
by_epoch = False
- T_max = T_max * epoch_length
+ if T_max is not None:
+ T_max = T_max * epoch_length
begin = int(begin * epoch_length)
if end != INF:
end = int(end * epoch_length)
--
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