Document approximation

2 files changed, 5 insertions, 2 deletions

diff --git a/networkx/algorithms/__init__.py b/networkx/algorithms/__init__.py
index 43430f58..f7183abb 100644
--- a/networkx/algorithms/__init__.py
+++ b/networkx/algorithms/__init__.py
@@ -1,4 +1,3 @@
-from networkx.algorithms.approximation import *
 from networkx.algorithms.assortativity import *
 from networkx.algorithms.block import *
 from networkx.algorithms.boundary import *
@@ -37,7 +36,6 @@ from networkx.algorithms.swap import *
 from networkx.algorithms.graphical import *
 from networkx.algorithms.simple_paths import *
 
-import networkx.algorithms.approximation
 import networkx.algorithms.assortativity
 import networkx.algorithms.bipartite
 import networkx.algorithms.centrality
diff --git a/networkx/algorithms/approximation/__init__.py b/networkx/algorithms/approximation/__init__.py
index 3eadebbe..f59dd911 100644
--- a/networkx/algorithms/approximation/__init__.py
+++ b/networkx/algorithms/approximation/__init__.py
@@ -1,3 +1,8 @@
+'''
+    .. warning:: The approximation submodule is not imported automatically with networkx.
+    
+    Approximate algorithms can be imported with ``from networkx.algorithms import approximation``.
+'''
 from networkx.algorithms.approximation.clustering_coefficient import *
 from networkx.algorithms.approximation.clique import *
 from networkx.algorithms.approximation.connectivity import *