Swap RuntimeError for ValueError in AnchoredOffsetBox

dstansby · dstansby · commit 74023b116594 · 2017-01-17T20:12:46.000Z
diff --git a/lib/matplotlib/offsetbox.py b/lib/matplotlib/offsetbox.py
@@ -1046,9 +1046,9 @@ def __init__(self, loc,
             try:
                 loc = self.codes[loc]
             except KeyError:
-                raise RuntimeError('Unrecognized location "%s". Valid '
-                                   'locations are\n\t%s\n'
-                                   % (loc, '\n\t'.join(self.codes)))
+                raise ValueError('Unrecognized location "%s". Valid '
+                                 'locations are\n\t%s\n'
+                                 % (loc, '\n\t'.join(self.codes)))
 
         self.loc = loc
         self.borderpad = borderpad
