[Zope3-checkins] CVS: Zope3/lib/python/Interface/Registry - _flatten.py:1.2

[Jim Fulton]

Update of /cvs-repository/Zope3/lib/python/Interface/Registry
In directory cvs.zope.org:/tmp/cvs-serv3830

Modified Files:
	_flatten.py 
Log Message:
Added an option to tack None onto the end of the list of flattened
interfaces. 


=== Zope3/lib/python/Interface/Registry/_flatten.py 1.1 => 1.2 ===
--- Zope3/lib/python/Interface/Registry/_flatten.py:1.1	Thu Aug  1 11:33:43 2002
+++ Zope3/lib/python/Interface/Registry/_flatten.py	Mon Nov 18 15:37:47 2002
@@ -21,7 +21,7 @@
 
 from Interface import Interface
 
-def _flatten(implements):
+def _flatten(implements, include_None=0):
     """Flatten an implements spec to a list of interfaces
 
     The list includes all base interfaces of the interface(s) in
@@ -39,6 +39,9 @@
             seen[interface] = 1
             flattened.append(interface)
     flattened.reverse()
+
+    if include_None:
+        flattened.append(None)
 
     return flattened