fix 01en (#811)

01.fit_a_line/README.md

@@ -175,14 +175,20 @@ offset = int(data.shape[0]\*ratio)
 train_data = data[:offset]
 test_data = data[offset:]
 
+def reader_creator(train_data):  
+    def reader():  
+        for d in train_data:  
+            yield d[:-1], d[-1:]  
+    return reader
+
 train_reader = paddle.batch(
     paddle.reader.shuffle(
-        train_data, buf_size=500),
+        reader_creator(train_data), buf_size=500),
         batch_size=BATCH_SIZE)
 
 test_reader = paddle.batch(
     paddle.reader.shuffle(
-        test_data, buf_size=500),
+        reader_creator(test_data), buf_size=500),
         batch_size=BATCH_SIZE)
 ```
 

01.fit_a_line/index.html

@@ -217,14 +217,20 @@ offset = int(data.shape[0]\*ratio)
 train_data = data[:offset]
 test_data = data[offset:]
 
+def reader_creator(train_data):  
+    def reader():  
+        for d in train_data:  
+            yield d[:-1], d[-1:]  
+    return reader
+
 train_reader = paddle.batch(
     paddle.reader.shuffle(
-        train_data, buf_size=500),
+        reader_creator(train_data), buf_size=500),
         batch_size=BATCH_SIZE)
 
 test_reader = paddle.batch(
     paddle.reader.shuffle(
-        test_data, buf_size=500),
+        reader_creator(test_data), buf_size=500),
         batch_size=BATCH_SIZE)
 ```