Small fix (#1377)

lululxvi · Jul 12, 2023 · 1fbecf2 · 1fbecf2
1 parent b16ac9f
commit 1fbecf2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/deepxde/utils/array_ops_compat.py b/deepxde/utils/array_ops_compat.py
@@ -22,7 +22,7 @@ def convert_to_array(value):
 
 
 def hstack(tup):
- if not is_tensor(tup[0]) and tup[0] == []:
+ if not is_tensor(tup[0]) and isinstance(tup[0], list) and tup[0] == []:
  tup = list(tup)
  if istensorlist(tup[1:]):
  tup[0] = bkd.as_tensor([], dtype=config.real(bkd.lib))