Fix PERF102: useless calls to dict.items()

pytensor/compile/debugmode.py

@@ -478,7 +478,7 @@ def _check_inputs(
     """
     destroyed_idx_list = []
     destroy_map = node.op.destroy_map
-    for o_pos, i_pos_list in destroy_map.items():
+    for i_pos_list in destroy_map.values():
         destroyed_idx_list.extend(i_pos_list)
     destroyed_res_list = [node.inputs[i] for i in destroyed_idx_list]
 
@@ -598,7 +598,7 @@ def _check_viewmap(fgraph, node, storage_map):
         # TODO: make sure this is correct
         # According to OB, duplicate inputs are rejected on build graph time
         # if they cause problems. So if they are here it should be ok.
-        for key, val in good_alias.items():
+        for key in good_alias:
             bad_alias.pop(key, None)
         if bad_alias:
             raise BadViewMap(node, oi, outstorage, list(bad_alias.values()))

pytensor/compile/profiling.py

@@ -1380,9 +1380,9 @@ class ProfileStats:
         items.sort(key=lambda a: a[1], reverse=True)
         for idx, ((fgraph, node), node_outputs_size) in enumerate(items[:N]):
             code = ["c"] * len(node.outputs)
-            for out, inp in node.op.destroy_map.items():
+            for out in node.op.destroy_map:
                 code[out] = "i"
-            for out, inp in node.op.view_map.items():
+            for out in node.op.view_map:
                 code[out] = "v"
             shapes = str(fct_shapes[fgraph][node])
 

pytensor/graph/destroyhandler.py

@@ -182,7 +182,7 @@ def _build_droot_impact(destroy_handler):
     root_destroyer = {}  # root -> destroyer apply
 
     for app in destroy_handler.destroyers:
-        for output_idx, input_idx_list in app.op.destroy_map.items():
+        for input_idx_list in app.op.destroy_map.values():
             if len(input_idx_list) != 1:
                 raise NotImplementedError()
             input_idx = input_idx_list[0]
@@ -698,7 +698,7 @@ class DestroyHandler(Bookkeeper):
                 # keep track of clients that should run before the current Apply
                 root_clients = set_type()
                 # for each destroyed input...
-                for output_idx, input_idx_list in app.op.destroy_map.items():
+                for input_idx_list in app.op.destroy_map.values():
                     destroyed_idx = input_idx_list[0]
                     destroyed_variable = app.inputs[destroyed_idx]
                     root = droot[destroyed_variable]

pytensor/link/vm.py

@@ -545,7 +545,7 @@ class Stack(UpdatingVM):
             # Add the outputs that are needed for the in-place updates of the
             # inputs in `self.update_vars`
             output_subset = list(output_subset)
-            for inp, out in self.update_vars.items():
+            for out in self.update_vars.values():
                 out_idx = self.fgraph.outputs.index(out)
                 if out_idx not in output_subset:
                     output_subset.append(out_idx)

tests/tensor/utils.py

@@ -528,7 +528,7 @@ def makeTester(
 
         @pytest.mark.skipif(skip, reason="Skipped")
         def test_bad_build(self):
-            for testname, inputs in self.bad_build.items():
+            for inputs in self.bad_build.values():
                 inputs = [copy(input) for input in inputs]
                 inputrs = [shared(input) for input in inputs]
                 with pytest.raises(Exception):