FIX: allow singleton labels in hist

jklymak · jklymak · commit a3b33fe93229 · 2018-10-19T20:28:59.000-07:00
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -6756,9 +6756,11 @@ def hist(self, x, bins=None, range=None, density=None, weights=None,
 
         if label is None:
             labels = [None]
-        elif isinstance(label, str):
-            labels = [label]
         else:
+            if isinstance(label, str):
+                label = [label]
+            elif not np.iterable(label):
+                label = [label]
             labels = [str(lab) for lab in label]
 
         for patch, lbl in itertools.zip_longest(patches, labels):
