update import statements for python3 compatibality.

deepwalk/__main__.py

@@ -10,10 +10,10 @@ from collections import Counter
 from concurrent.futures import ProcessPoolExecutor
 import logging
 
-import graph
-import walks as serialized_walks
+from . import graph
+from . import walks as serialized_walks
 from gensim.models import Word2Vec
-from skipgram import Skipgram
+from .skipgram import Skipgram
 
 from six import text_type as unicode
 from six import iteritems

deepwalk/walks.py

@@ -9,7 +9,7 @@ from collections import Counter
 
 from six.moves import zip
 
-import graph
+from . import graph
 
 logger = logging.getLogger("deepwalk")