From 83ac0133bd4841d36a41000753dd77e796747f7f Mon Sep 17 00:00:00 2001
From: Brett Cannon <brett@python.org>
Date: Fri, 2 Mar 2012 12:10:48 -0500
Subject: Clarify importlib.machinery.PathFinder's difference from what
 __import__() does.

---
 Doc/library/importlib.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Doc/library/importlib.rst b/Doc/library/importlib.rst
index 66a5c4e..e5cc27f 100644
--- a/Doc/library/importlib.rst
+++ b/Doc/library/importlib.rst
@@ -477,7 +477,9 @@ find and load modules.
 
     This class does not perfectly mirror the semantics of :keyword:`import` in
     terms of :data:`sys.path`. No implicit path hooks are assumed for
-    simplification of the class and its semantics.
+    simplification of the class and its semantics. This implies that when
+    ``None`` is found in :data:`sys.path_importer_cache` that it is simply
+    ignored instead of implying a default finder.
 
     Only class methods are defined by this class to alleviate the need for
     instantiation.
-- 
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