MNT: use a slightly simpler check odd Index behavior

tacaswell · tacaswell · commit df4b7dcb0562 · 2019-08-08T21:50:36.000-04:00
This will fail on older version of pandas as well.
diff --git a/lib/matplotlib/cbook/__init__.py b/lib/matplotlib/cbook/__init__.py
@@ -1326,10 +1326,12 @@ def _check_1d(x):
         return np.atleast_1d(x)
     else:
         try:
-            shape = x[:, None].shape
+            ndim = x[:, None].ndim
             # work around https://github.com/pandas-dev/pandas/issues/27775
-            # which mean the shape is not as expected
-            if len(shape) != 2:
+            # which mean the shape is not as expected. That this ever worked
+            # was an unintentional quirk of pandas the above line will raise
+            # an exception in the future.
+            if ndim < 2:
                 return np.atleast_1d(x)
             return x
         except (IndexError, TypeError):
