python 2.7 doesn't support keyword-only args

Author: mdeff

pygsp/graphs/nngraphs/nngraph.py

@@ -284,7 +284,7 @@ class NNGraph(Graph):
 
     """
 
-    def __init__(self, features, *, center=True, rescale=True,
+    def __init__(self, features, center=True, rescale=True,
                  metric='euclidean', order=0,
                  kind='knn', k=10, radius=0.01,
                  kernel_width=None,