chain2: merge pull request #3765 to pybind11

Author: qindazhu

egs/mini_librispeech/s5/local/chain2/tuning/run_tdnn_1a.sh

@@ -140,7 +140,7 @@ mkdir -p $dir/configs/
 # $dir/init will contain the initial models
 mkdir -p $dir/init/
 
-learning_rate_factor=$(echo "print 0.5/$xent_regularize" | python)
+learning_rate_factor=$(echo "print (0.5/$xent_regularize)" | python)
 
 if [ $stage -le 14 ]; then
 

egs/mini_librispeech/s5/run.sh

@@ -196,7 +196,7 @@ fi
 
 # Train a chain model
 if [ $stage -le 9 ]; then
-  local/chain/run_tdnn.sh
+  local/chain2/run_tdnn.sh
 fi
 
 # local/grammar/simple_demo.sh