diff --git a/paddle/fluid/API.spec b/paddle/fluid/API.spec
index 9b04a58c98539f86ca94af380dffa38746053781..7a8f2a185f7ca7d69608555004d66b8e62d35979 100644
--- a/paddle/fluid/API.spec
+++ b/paddle/fluid/API.spec
@@ -168,7 +168,7 @@ paddle.fluid.layers.batch ArgSpec(args=['reader', 'batch_size'], varargs=None, k
 paddle.fluid.layers.double_buffer ArgSpec(args=['reader', 'place', 'name'], varargs=None, keywords=None, defaults=(None, None))
 paddle.fluid.layers.random_data_generator ArgSpec(args=['low', 'high', 'shapes', 'lod_levels', 'for_parallel'], varargs=None, keywords=None, defaults=(True,))
 paddle.fluid.layers.py_reader ArgSpec(args=['capacity', 'shapes', 'dtypes', 'lod_levels', 'name', 'use_double_buffer'], varargs=None, keywords=None, defaults=(None, None, True))
-paddle.fluid.layers.py_reader_by_data ArgSpec(args=['capacity', 'feed_list', 'name', 'use_double_buffer'], varargs=None, keywords=None, defaults=(None, True))
+paddle.fluid.layers.create_py_reader_by_data ArgSpec(args=['capacity', 'feed_list', 'name', 'use_double_buffer'], varargs=None, keywords=None, defaults=(None, True))
 paddle.fluid.layers.Preprocessor.__init__ ArgSpec(args=['self', 'reader', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.Preprocessor.block ArgSpec(args=[], varargs='args', keywords='kwds', defaults=None)
 paddle.fluid.layers.Preprocessor.inputs ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
diff --git a/python/paddle/fluid/layers/io.py b/python/paddle/fluid/layers/io.py
index 09bff06d3e712ac161400a8f84f14f2752025bc6..e0e397f639315b6a09d15954aca39a124ee6a163 100644
--- a/python/paddle/fluid/layers/io.py
+++ b/python/paddle/fluid/layers/io.py
@@ -30,8 +30,8 @@ from ..unique_name import generate as unique_name
 
 __all__ = [
     'data', 'open_files', 'read_file', 'shuffle', 'batch', 'double_buffer',
-    'random_data_generator', 'py_reader', 'py_reader_by_data', 'Preprocessor',
-    'load'
+    'random_data_generator', 'py_reader', 'create_py_reader_by_data',
+    'Preprocessor', 'load'
 ]
 
 
@@ -480,7 +480,7 @@ def _py_reader(capacity,
                feed_list=None):
 
     if feed_list is not None:
-        if isinstance(feed_list, list):
+        if not isinstance(feed_list, list):
             raise TypeError("feed_list should be a list of Variable"
                             " instead of " + str(type(feed_list)))
         lod_levels = []
@@ -758,7 +758,10 @@ def py_reader(capacity,
         use_double_buffer=use_double_buffer)
 
 
-def py_reader_by_data(capacity, feed_list, name=None, use_double_buffer=True):
+def create_py_reader_by_data(capacity,
+                             feed_list,
+                             name=None,
+                             use_double_buffer=True):
     """
     Create a Python reader for data feeding in Python
 
@@ -781,7 +784,6 @@ def py_reader_by_data(capacity, feed_list, name=None, use_double_buffer=True):
 
         1. The basic usage of :code:`py_reader` is as follows:
 
-        >>> import paddle.v2
         >>> import paddle.fluid as fluid
         >>> import paddle.dataset.mnist as mnist
         >>>
diff --git a/python/paddle/fluid/tests/unittests/test_py_reader_using_executor.py b/python/paddle/fluid/tests/unittests/test_py_reader_using_executor.py
index aaa6e762d6e1608d49777ce29c127ee70671cc63..b85b94c939f76a3ba67a301682d9d356b481e0c9 100644
--- a/python/paddle/fluid/tests/unittests/test_py_reader_using_executor.py
+++ b/python/paddle/fluid/tests/unittests/test_py_reader_using_executor.py
@@ -58,7 +58,7 @@ def simple_fc_net(in_size,
     if use_feed_list:
         data = fluid.layers.data(name="data", dtype='float32', shape=[in_size])
         label = fluid.layers.data(name='label', dtype='int64', shape=[1])
-        reader = fluid.layers.py_reader_by_data(
+        reader = fluid.layers.create_py_reader_by_data(
             capacity=queue_capacity,
             use_double_buffer=False,
             feed_list=[data, label])
@@ -114,7 +114,8 @@ class TestPyReaderUsingExecutor(unittest.TestCase):
                         print({
                             'use_cuda': use_cuda,
                             'use_parallel_executor': use_parallel_executor,
-                            'use_double_buffer': use_double_buffer
+                            'use_double_buffer': use_double_buffer,
+                            'use_feed_list': use_feed_list
                         })
                         self.main(use_cuda, use_parallel_executor,
                                   use_double_buffer, use_feed_list)