BF: Convert namespace path to list

matthew-brett · matthew-brett · commit 10d94aebab63 · 2016-12-29T18:21:22.000Z
For some reason, on some systems, the ``__path__`` attribute of a module is a _NamespacePath, not a list, as we expected - see: MacPython/matplotlib-wheels#2
diff --git a/lib/matplotlib/testing/decorators.py b/lib/matplotlib/testing/decorators.py
@@ -461,7 +461,7 @@ def find_dotted_module(module_name, path=None):
                         file.close()
                 except ImportError:
                     # assume namespace package
-                    path = sys.modules[sub_mod].__path__
+                    path = list(sys.modules[sub_mod].__path__)
                     res = None, path, None
             return res
 
