fix typo

Author: ZHUI

pgl/tests/test_graph_saint_sample.py

@@ -11,12 +11,16 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-"""graph saint sample test"""
-
+"""graph saint sample test
+"""
+from __future__ import division
+from __future__ import absolute_import
+from __future__ import print_function
+from __future__ import unicode_literals
 import unittest
+import numpy as np
 
 import pgl
-import numpy as np
 import paddle.fluid as fluid
 from pgl.sample import graph_saint_random_walk_sample
 
@@ -25,14 +29,14 @@ class GraphSaintSampleTest(unittest.TestCase):
     """GraphSaintSampleTest"""
 
     def test_randomwalk_sampler(self):
-        """test_scatter_add"""
+        """test_randomwalk_sampler"""
         g = pgl.graph.Graph(
             num_nodes=8,
             edges=[(1, 2), (2, 3), (0, 2), (0, 1), (6, 7), (4, 5), (6, 4),
                    (7, 4), (3, 4)])
         subgraph = graph_saint_random_walk_sample(g, [6, 7], 2)
-        print('reinded', subgraph._from_reindex)
-        print('sub_edges', subgraph.edges)
+        print('reindex', subgraph._from_reindex)
+        print('subedges', subgraph.edges)
         assert len(subgraph.nodes) == 4
         assert len(subgraph.edges) == 4
         true_edges = np.array([[0, 1], [2, 3], [2, 0], [3, 0]])