From 6d1fb79dc483afcebd8207b708e0c844bd5da1a3 Mon Sep 17 00:00:00 2001
From: littletomatodonkey <2120160898@bit.edu.cn>
Date: Sat, 9 Jan 2021 19:39:44 +0800
Subject: [PATCH] fix pad (#30231)

---
 python/paddle/nn/functional/common.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/python/paddle/nn/functional/common.py b/python/paddle/nn/functional/common.py
index 7319b860db..fac5ca2f79 100644
--- a/python/paddle/nn/functional/common.py
+++ b/python/paddle/nn/functional/common.py
@@ -1276,6 +1276,9 @@ def pad(x, pad, mode='constant', value=0, data_format="NCHW", name=None):
 
     x_dim = len(x.shape)
 
+    if mode == "constant" and isinstance(pad, list) and len(pad) == x_dim * 2:
+        return layers.pad(x, pad, pad_value=value)
+
     assert x_dim in [
         3, 4, 5
     ], "input tesor dimension must be in [3, 4, 5] but got {}".format(x_dim)
@@ -1291,9 +1294,6 @@ def pad(x, pad, mode='constant', value=0, data_format="NCHW", name=None):
 
     unsqueezed_dim = []
 
-    if mode == "constant" and isinstance(pad, list) and len(pad) == x_dim * 2:
-        return layers.pad(x, pad, pad_value=value)
-
     if isinstance(pad, Variable):
         if data_format in ["NCL", "NCHW", "NCDHW"]:
             data_format = "NCDHW"
-- 
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