fix bug: batch_size diff

fluid/text_classification/train.py

@@ -89,7 +89,7 @@ def train(train_reader,
 
 def train_net():
     word_dict, train_reader, test_reader = utils.prepare_data(
-        "imdb", self_dict=False, batch_size=128, buf_size=50000)
+        "imdb", self_dict=False, batch_size=4, buf_size=50000)
 
     if sys.argv[1] == "bow":
         train(
@@ -101,7 +101,7 @@ def train_net():
             save_dirname="bow_model",
             lr=0.002,
             pass_num=30,
-            batch_size=128)
+            batch_size=4)
     elif sys.argv[1] == "cnn":
         train(
             train_reader,
@@ -134,7 +134,7 @@ def train_net():
             save_dirname="gru_model",
             lr=0.05,
             pass_num=30,
-            batch_size=128)
+            batch_size=4)
     else:
         print("network name cannot be found!")
         sys.exit(1)