Work on strings instead of binary in Python3 (#2622)

tensorflow/examples/tutorials/word2vec/word2vec_basic.py

@@ -51,7 +51,7 @@ filename = maybe_download('text8.zip', 31344016)
 def read_data(filename):
   """Extract the first file enclosed in a zip file as a list of words"""
   with zipfile.ZipFile(filename) as f:
-    data = f.read(f.namelist()[0]).split()
+    data = tf.compat.as_str(f.read(f.namelist()[0])).split()
   return data
 
 words = read_data(filename)