diff --git a/python/paddle/__init__.py b/python/paddle/__init__.py
index 94091c94bb5330f66afee70d97bfbf763700c197..4b9f310e73bbe01c8c3d61b80558ffac304f31f3 100755
--- a/python/paddle/__init__.py
+++ b/python/paddle/__init__.py
@@ -265,6 +265,7 @@ from .framework import DataParallel  #DEFINE_ALIAS
 
 from .framework import set_default_dtype  #DEFINE_ALIAS
 from .framework import get_default_dtype  #DEFINE_ALIAS
+from .framework import set_grad_enabled  #DEFINE_ALIAS
 
 from .tensor.search import index_sample  #DEFINE_ALIAS
 from .tensor.stat import mean  #DEFINE_ALIAS
diff --git a/python/paddle/dataset/__init__.py b/python/paddle/dataset/__init__.py
index 2db867d7a7acbf590c3e334fcabd5f43efd1474f..4b71ff6ac66f1e75f9aad0b49c6618b52c30c4a0 100644
--- a/python/paddle/dataset/__init__.py
+++ b/python/paddle/dataset/__init__.py
@@ -15,18 +15,18 @@
 Dataset package.
 """
 
-import paddle.dataset.mnist
-import paddle.dataset.imikolov
-import paddle.dataset.imdb
-import paddle.dataset.cifar
-import paddle.dataset.movielens
-import paddle.dataset.conll05
-import paddle.dataset.uci_housing
-import paddle.dataset.wmt14
-import paddle.dataset.wmt16
-import paddle.dataset.flowers
-import paddle.dataset.voc2012
-import paddle.dataset.image
+import paddle.dataset.mnist  # noqa: F401
+import paddle.dataset.imikolov  # noqa: F401
+import paddle.dataset.imdb  # noqa: F401
+import paddle.dataset.cifar  # noqa: F401
+import paddle.dataset.movielens  # noqa: F401
+import paddle.dataset.conll05  # noqa: F401
+import paddle.dataset.uci_housing  # noqa: F401
+import paddle.dataset.wmt14  # noqa: F401
+import paddle.dataset.wmt16  # noqa: F401
+import paddle.dataset.flowers  # noqa: F401
+import paddle.dataset.voc2012  # noqa: F401
+import paddle.dataset.image  # noqa: F401
 
 # set __all__ as empty for not showing APIs under paddle.dataset
 __all__ = []
diff --git a/python/paddle/dataset/cifar.py b/python/paddle/dataset/cifar.py
index 2ee95c3723b3ab771f9859d0b658ae0ee8f8291a..a6b6e28c0f5a352dbfa39f186de73cc70736b835 100644
--- a/python/paddle/dataset/cifar.py
+++ b/python/paddle/dataset/cifar.py
@@ -37,8 +37,6 @@ import tarfile
 import six
 from six.moves import cPickle as pickle
 
-__all__ = ['train100', 'test100', 'train10', 'test10']
-
 URL_PREFIX = 'https://dataset.bj.bcebos.com/cifar/'
 CIFAR10_URL = URL_PREFIX + 'cifar-10-python.tar.gz'
 CIFAR10_MD5 = 'c58f30108f718f92721af3b95e74349a'
diff --git a/python/paddle/dataset/common.py b/python/paddle/dataset/common.py
index 2884fa0ce5e3d037fe2e929218da0aa52c1c0d8e..cff0c6257387c21d04a019eaf6d61db5790bf476 100644
--- a/python/paddle/dataset/common.py
+++ b/python/paddle/dataset/common.py
@@ -26,14 +26,6 @@ import paddle.dataset
 import six.moves.cPickle as pickle
 import glob
 
-__all__ = [
-    'DATA_HOME',
-    'download',
-    'md5file',
-    'split',
-    'cluster_files_reader',
-]
-
 HOME = os.path.expanduser('~')
 DATA_HOME = os.path.join(HOME, '.cache', 'paddle', 'dataset')
 
diff --git a/python/paddle/dataset/conll05.py b/python/paddle/dataset/conll05.py
index e7176626ca2d18cda5e61f267d2273b66b118adf..96fd5ae7d76c81e5a531efc7d5f99417abf2d0f4 100644
--- a/python/paddle/dataset/conll05.py
+++ b/python/paddle/dataset/conll05.py
@@ -30,8 +30,6 @@ import paddle.compat as cpt
 import paddle.utils.deprecated as deprecated
 from six.moves import zip, range
 
-__all__ = ['test, get_dict', 'get_embedding']
-
 DATA_URL = 'http://paddlemodels.bj.bcebos.com/conll05st/conll05st-tests.tar.gz'
 DATA_MD5 = '387719152ae52d60422c016e92a742fc'
 WORDDICT_URL = 'http://paddlemodels.bj.bcebos.com/conll05st%2FwordDict.txt'
diff --git a/python/paddle/dataset/flowers.py b/python/paddle/dataset/flowers.py
index e16ea6e561eae3b62f1d140f78d4b60abbaa08cc..67ffd8e1ee1edaab2539591603cef3f774a42c50 100644
--- a/python/paddle/dataset/flowers.py
+++ b/python/paddle/dataset/flowers.py
@@ -35,7 +35,12 @@ import itertools
 import functools
 from .common import download
 import tarfile
-from paddle.dataset.image import *
+
+from paddle.dataset.image import load_image_bytes
+from paddle.dataset.image import load_image
+from paddle.dataset.image import simple_transform
+from paddle.dataset.image import batch_images_from_tar
+
 from paddle.reader import map_readers, xmap_readers
 from paddle import compat as cpt
 import paddle.utils.deprecated as deprecated
@@ -45,7 +50,6 @@ from multiprocessing import cpu_count
 import six
 from six.moves import cPickle as pickle
 from paddle.utils import try_import
-__all__ = ['train', 'test', 'valid']
 
 DATA_URL = 'http://paddlemodels.bj.bcebos.com/flowers/102flowers.tgz'
 LABEL_URL = 'http://paddlemodels.bj.bcebos.com/flowers/imagelabels.mat'
diff --git a/python/paddle/dataset/image.py b/python/paddle/dataset/image.py
index 09b5607252bda6ffb1a410a1cb194e4a6394abe4..31329cd978cb59c8cfcf5c6038839c3b9bca904e 100644
--- a/python/paddle/dataset/image.py
+++ b/python/paddle/dataset/image.py
@@ -58,12 +58,6 @@ import os
 import tarfile
 import six.moves.cPickle as pickle
 
-__all__ = [
-    "load_image_bytes", "load_image", "resize_short", "to_chw", "center_crop",
-    "random_crop", "left_right_flip", "simple_transform", "load_and_transform",
-    "batch_images_from_tar"
-]
-
 
 def _check_cv2():
     if cv2 is None:
diff --git a/python/paddle/dataset/imdb.py b/python/paddle/dataset/imdb.py
index dab3c964cc6b73c7149d53b6899ded2effc2e97a..33ae4405c502b3a7f8998820b038f5beb0819830 100644
--- a/python/paddle/dataset/imdb.py
+++ b/python/paddle/dataset/imdb.py
@@ -30,8 +30,6 @@ import re
 import string
 import six
 
-__all__ = ['build_dict', 'train', 'test']
-
 #URL = 'http://ai.stanford.edu/%7Eamaas/data/sentiment/aclImdb_v1.tar.gz'
 URL = 'https://dataset.bj.bcebos.com/imdb%2FaclImdb_v1.tar.gz'
 MD5 = '7c2ac02c03563afcf9b574c7e56c153a'
diff --git a/python/paddle/dataset/imikolov.py b/python/paddle/dataset/imikolov.py
index cc8e95fc342c28a12070582e27134ffa1800bd5d..3b8b12303c9493716984f7c2a974315b41eb13b5 100644
--- a/python/paddle/dataset/imikolov.py
+++ b/python/paddle/dataset/imikolov.py
@@ -27,8 +27,6 @@ import collections
 import tarfile
 import six
 
-__all__ = ['train', 'test', 'build_dict']
-
 #URL = 'http://www.fit.vutbr.cz/~imikolov/rnnlm/simple-examples.tgz'
 URL = 'https://dataset.bj.bcebos.com/imikolov%2Fsimple-examples.tgz'
 MD5 = '30177ea32e27c525793142b6bf2c8e2d'
diff --git a/python/paddle/dataset/mnist.py b/python/paddle/dataset/mnist.py
index 14e54d593bbe7eb351e1371d107e1144ed4df5f8..06e8174a61e803fe0fed067aad5556726837839a 100644
--- a/python/paddle/dataset/mnist.py
+++ b/python/paddle/dataset/mnist.py
@@ -26,7 +26,6 @@ import gzip
 import numpy
 import struct
 from six.moves import range
-__all__ = ['train', 'test']
 
 URL_PREFIX = 'https://dataset.bj.bcebos.com/mnist/'
 TEST_IMAGE_URL = URL_PREFIX + 't10k-images-idx3-ubyte.gz'
diff --git a/python/paddle/dataset/movielens.py b/python/paddle/dataset/movielens.py
index f753f405bba1f2671a4ac4acbcfb024bd417d6ca..23781b65785b10779de8ef56eadf5f27d74a5f19 100644
--- a/python/paddle/dataset/movielens.py
+++ b/python/paddle/dataset/movielens.py
@@ -34,11 +34,6 @@ import functools
 import six
 import paddle.compat as cpt
 
-__all__ = [
-    'train', 'test', 'get_movie_title_dict', 'max_movie_id', 'max_user_id',
-    'age_table', 'movie_categories', 'max_job_id', 'user_info', 'movie_info'
-]
-
 age_table = [1, 18, 25, 35, 45, 50, 56]
 
 #URL = 'http://files.grouplens.org/datasets/movielens/ml-1m.zip'
diff --git a/python/paddle/dataset/uci_housing.py b/python/paddle/dataset/uci_housing.py
index daed62fbefba18c34d120f1e95a706f7dcd34706..1bc2098350f5339234ec43b7a962ef118ea9df2e 100644
--- a/python/paddle/dataset/uci_housing.py
+++ b/python/paddle/dataset/uci_housing.py
@@ -29,8 +29,6 @@ import os
 import paddle.dataset.common
 import paddle.utils.deprecated as deprecated
 
-__all__ = ['train', 'test']
-
 URL = 'http://paddlemodels.bj.bcebos.com/uci_housing/housing.data'
 MD5 = 'd4accdce7a25600298819f8e28e8d593'
 feature_names = [
diff --git a/python/paddle/dataset/voc2012.py b/python/paddle/dataset/voc2012.py
index 5a0ff76aab4fe81883de1512bac4f91fcf1b7992..1575b44cd1677e3a28ad7c3d3fa36f9c95b223f3 100644
--- a/python/paddle/dataset/voc2012.py
+++ b/python/paddle/dataset/voc2012.py
@@ -29,8 +29,6 @@ from paddle.dataset.image import *
 import paddle.utils.deprecated as deprecated
 from PIL import Image
 
-__all__ = ['train', 'test', 'val']
-
 VOC_URL = 'http://host.robots.ox.ac.uk/pascal/VOC/voc2012/\
 VOCtrainval_11-May-2012.tar'
 
diff --git a/python/paddle/dataset/wmt14.py b/python/paddle/dataset/wmt14.py
index 3bd5e8d5bad46b74724f10307150fe33c86bd956..818f4b28ba143f99637a061563630a584e9a2521 100644
--- a/python/paddle/dataset/wmt14.py
+++ b/python/paddle/dataset/wmt14.py
@@ -30,12 +30,6 @@ import paddle.dataset.common
 import paddle.compat as cpt
 import paddle.utils.deprecated as deprecated
 
-__all__ = [
-    'train',
-    'test',
-    'get_dict',
-]
-
 URL_DEV_TEST = ('http://www-lium.univ-lemans.fr/~schwenk/'
                 'cslm_joint_paper/data/dev+test.tgz')
 MD5_DEV_TEST = '7d7897317ddd8ba0ae5c5fa7248d3ff5'
diff --git a/python/paddle/dataset/wmt16.py b/python/paddle/dataset/wmt16.py
index 7f11bc4b1f013b57892bf14c43d4338bd41c9391..6804e7ab5fc33b0f15614e214c809c3e0cb2f54f 100644
--- a/python/paddle/dataset/wmt16.py
+++ b/python/paddle/dataset/wmt16.py
@@ -40,14 +40,6 @@ import paddle
 import paddle.compat as cpt
 import paddle.utils.deprecated as deprecated
 
-__all__ = [
-    "train",
-    "test",
-    "validation",
-    "fetch",
-    "get_dict",
-]
-
 DATA_URL = ("http://paddlemodels.bj.bcebos.com/wmt/wmt16.tar.gz")
 DATA_MD5 = "0c38be43600334966403524a40dcd81e"
 
diff --git a/python/paddle/framework/__init__.py b/python/paddle/framework/__init__.py
index b8684874085a9c44048d1473ddec956dcff3cf3e..660267c24e57eec082d96170b407943f7b69ac14 100644
--- a/python/paddle/framework/__init__.py
+++ b/python/paddle/framework/__init__.py
@@ -12,35 +12,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# TODO: import framework api under this directory
-__all__ = [
-    'create_parameter', 'ParamAttr', 'CPUPlace', 'CUDAPlace', 'CUDAPinnedPlace',
-    'NPUPlace', 'get_default_dtype', 'set_default_dtype'
-]
+# TODO: import framework api under this directory 
 
-__all__ += [
-    'grad', 'set_grad_enabled', 'LayerList', 'load', 'save', 'no_grad',
-    'DataParallel'
-]
+from . import random  # noqa: F401
+from .random import seed  # noqa: F401
+from .framework import get_default_dtype  # noqa: F401
+from .framework import set_default_dtype  # noqa: F401
+from .framework import set_grad_enabled  # noqa: F401
 
-from . import random
-from .random import seed
-from .framework import get_default_dtype
-from .framework import set_default_dtype
-from .framework import set_grad_enabled
+from ..fluid.param_attr import ParamAttr  # noqa: F401
+from ..fluid.layers.tensor import create_parameter  # noqa: F401
+from ..fluid.core import CPUPlace  # noqa: F401
+from ..fluid.core import CUDAPlace  # noqa: F401
+from ..fluid.core import CUDAPinnedPlace  # noqa: F401
+from ..fluid.core import NPUPlace  # noqa: F401
+from ..fluid.core import VarBase  # noqa: F401
 
-from ..fluid.param_attr import ParamAttr  #DEFINE_ALIAS
-# from ..fluid.layers.tensor import create_global_var  #DEFINE_ALIAS
-from ..fluid.layers.tensor import create_parameter  #DEFINE_ALIAS
-from ..fluid.core import CPUPlace  #DEFINE_ALIAS
-from ..fluid.core import CUDAPlace  #DEFINE_ALIAS
-from ..fluid.core import CUDAPinnedPlace  #DEFINE_ALIAS
-from ..fluid.core import NPUPlace  #DEFINE_ALIAS
-from ..fluid.core import VarBase  #DEFINE_ALIAS
-
-from paddle.fluid import core  #DEFINE_ALIAS
-from ..fluid.dygraph.base import no_grad_ as no_grad  #DEFINE_ALIAS
-from ..fluid.dygraph.base import grad  #DEFINE_ALIAS
-from .io import save
-from .io import load
-from ..fluid.dygraph.parallel import DataParallel  #DEFINE_ALIAS
+from paddle.fluid import core  # noqa: F401
+from ..fluid.dygraph.base import no_grad_ as no_grad  # noqa: F401
+from ..fluid.dygraph.base import grad  # noqa: F401
+from .io import save  # noqa: F401
+from .io import load  # noqa: F401
+from ..fluid.dygraph.parallel import DataParallel  # noqa: F401
diff --git a/python/paddle/framework/framework.py b/python/paddle/framework/framework.py
index 77be85a3195fd6dbac6f07c57e867f01343dfc2a..f50285010cc5de9cd86721c224332fab983490a4 100644
--- a/python/paddle/framework/framework.py
+++ b/python/paddle/framework/framework.py
@@ -19,8 +19,6 @@ from paddle.fluid.framework import _dygraph_tracer
 import numpy as np
 from contextlib import contextmanager
 
-__all__ = ['set_default_dtype', 'get_default_dtype']
-
 
 def set_default_dtype(d):
     """
diff --git a/python/paddle/framework/io.py b/python/paddle/framework/io.py
index 32a62d2461a14b2a68ca92844afad0f6a102424a..955d8610a590968f5307005e7b5db540b57678a6 100644
--- a/python/paddle/framework/io.py
+++ b/python/paddle/framework/io.py
@@ -38,11 +38,6 @@ from paddle.fluid.dygraph.jit import _SaveLoadConfig
 from paddle.fluid.dygraph.io import _construct_program_holders, _construct_params_and_buffers
 from paddle.fluid.dygraph.io import INFER_MODEL_SUFFIX, INFER_PARAMS_SUFFIX, INFER_PARAMS_INFO_SUFFIX
 
-__all__ = [
-    'save',
-    'load',
-]
-
 
 def _build_saved_state_dict(state_dict):
     save_dict = {}
diff --git a/python/paddle/framework/random.py b/python/paddle/framework/random.py
index 1624a069a51eca24926bbaa030e43671e176ca00..cce951374360b4beab73cf3e2eeff4867f77c33a 100644
--- a/python/paddle/framework/random.py
+++ b/python/paddle/framework/random.py
@@ -16,8 +16,6 @@
 import paddle.fluid as fluid
 from paddle.fluid import core
 
-__all__ = ['seed', 'get_cuda_rng_state', 'set_cuda_rng_state']
-
 
 def seed(seed):
     """