Fixed imports since new categorization feature requires Iterable

tleonhardt · tleonhardt · commit 4f68eb2a9f03 · 2018-04-09T22:46:48.000-07:00
diff --git a/cmd2.py b/cmd2.py
@@ -56,7 +56,7 @@
 # Collection is a container that is sizable and iterable
 # It was introduced in Python 3.6. We will try to import it, otherwise use our implementation
 try:
-    from collections.abc import Collection
+    from collections.abc import Collection, Iterable
 except ImportError:
 
     if six.PY3:
