PY3 allow multiple base classes in six.with_metaclass

miki725 · larsmans · commit df74a8ac624d · 2013-04-03T17:49:45.000+02:00
Imported from https://bitbucket.org/gutworth/six/pull-request/10/fix-for-23-by-allowing-to-specify-multiple/diff
diff --git a/sklearn/externals/six.py b/sklearn/externals/six.py
@@ -329,6 +329,7 @@ def exec_(_code_, _globs_=None, _locs_=None):
 _add_doc(reraise, """Reraise an exception.""")
 
 
-def with_metaclass(meta, base=object):
+def with_metaclass(meta, *bases):
     """Create a base class with a metaclass."""
-    return meta("NewBase", (base,), {})
+    bases = bases or (object,)
+    return meta("NewBase", bases, {})
