MNT: catch correct exceptions

tacaswell · tacaswell · commit 50b547c6cc22 · 2015-12-12T21:41:37.000-05:00
using `next(iter(obj))` can raise `TypeError` if obj is not iterable
and `StopIteration` if len(obj) == 0.  As we are no longer explictily
indexing into `obj` it should not raise an `IndexError`
diff --git a/lib/matplotlib/dates.py b/lib/matplotlib/dates.py
@@ -1562,7 +1562,7 @@ def default_units(x, axis):
 
         try:
             x = next(iter(x))
-        except (TypeError, IndexError):
+        except (TypeError, StopIteration):
             pass
 
         try:
