Fix wrong type assert

Introduced in f9dfe70

Author: ricardoV94

pytensor/tensor/subtensor.py

@@ -325,7 +325,7 @@ def analyze(x):
         and is_step_constant
         and is_length_constant
     ):
-        assert isinstance(length, int)
+        assert isinstance(length, int | np.integer)
         _start, _stop, _step = slice(start, stop, step).indices(length)
         if _start <= _stop and _step >= 1:
             return slice(_start, _stop, _step), 1

tests/tensor/test_subtensor.py

@@ -159,6 +159,12 @@ def test_all_integer(self):
         assert isinstance(res[0], slice)
         assert res[1] == 1
 
+        res = get_canonical_form_slice(
+            slice(np.int64(1), np.int64(5), np.int64(2)), np.int64(7)
+        )
+        assert isinstance(res[0], slice)
+        assert res[1] == 1
+
     def test_all_symbolic(self):
         start = iscalar("b")
         stop = iscalar("e")