MAINT: make sure the constraint is a vector

drew-parsons · Feb 8, 2024 · 496fd87 · 496fd87
1 parent 51c6473
commit 496fd87
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/scipy/optimize/_differentialevolution.py b/scipy/optimize/_differentialevolution.py
@@ -1827,7 +1827,7 @@ def fun(x):
                 if x.ndim == 1 and res.ndim == 2:
                     # deal with case that constraint.A is an np.matrix
                     # see gh20041
-                    res = res[:, 0]
+                    res = np.squeeze(np.asarray(res[:, 0]))
 
                 return res
         elif isinstance(constraint, Bounds):