fixed layers import __all__

Author: zsdonghao

tensorlayer/layers/spatial_transformer.py

@@ -4,6 +4,7 @@
 from .core import *
 from .. import _logging as logging
 import tensorflow as tf
+import numpy as np
 
 __all__ = [
     'transformer',

tests/test_layers_importer.py

@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 
 import tensorlayer as tl
+import tensorflow as tf
 from keras.layers import *
 from tensorlayer.layers import *
 slim = tf.contrib.slim