Merge pull request #449 from lfchener/develop

update grad_clip to 1.8

Author: lfchener

README.md

@@ -27,7 +27,7 @@ To avoid the trouble of environment setup, [running in Docker container](#runnin
 
 ### Prerequisites
 - Python 2.7 only supported
-- PaddlePaddle 1.6.0 or later (please refer to the [Installation Guide](https://www.paddlepaddle.org.cn/documentation/docs/en/beginners_guide/index_en.html))
+- PaddlePaddle 1.8.0 or later (please refer to the [Installation Guide](https://www.paddlepaddle.org.cn/documentation/docs/en/beginners_guide/index_en.html))
 
 ### Setup
 - Make sure these libraries or tools installed: `pkg-config`, `flac`, `ogg`, `vorbis`, `boost` and `swig`, e.g. installing them via `apt-get`:

README_cn.md

@@ -25,7 +25,7 @@
 
 ### 前提
 - 只支持Python 2.7
-- PaddlePaddle 1.6.0 版本及以上（请参考[安装指南](https://www.paddlepaddle.org.cn/install/quick)）
+- PaddlePaddle 1.8.0 版本及以上（请参考[安装指南](https://www.paddlepaddle.org.cn/install/quick)）
 
 ### 安装
 - 请确保以下库或工具已安装完毕：`pkg-config`, `flac`, `ogg`, `vorbis`, `boost` 和 `swig`, 如可以通过`apt-get`安装：

model_utils/model.py

@@ -285,9 +285,8 @@ def train(self,
                         learning_rate=learning_rate,
                         decay_steps=num_samples / batch_size / dev_count,
                         decay_rate=0.83,
-                        staircase=True))
-                fluid.clip.set_gradient_clip(
-                    clip=fluid.clip.GradientClipByGlobalNorm(
+                        staircase=True),
+                    grad_clip=fluid.clip.GradientClipByGlobalNorm(
                         clip_norm=gradient_clipping))
                 optimizer.minimize(loss=ctc_loss)