diff --git a/mlir/lib/Bindings/Python/DialectTransform.cpp b/mlir/lib/Bindings/Python/DialectTransform.cpp
--- a/mlir/lib/Bindings/Python/DialectTransform.cpp
+++ b/mlir/lib/Bindings/Python/DialectTransform.cpp
@@ -53,7 +53,7 @@
       [](MlirType type) {
         MlirStringRef operationName =
             mlirTransformOperationTypeGetOperationName(type);
-        return py::str(operationName.data, operationName.length);
+        return py::bytes(operationName.data, operationName.length);
       },
       "Get the name of the payload operation accepted by the handle.");
 }
diff --git a/mlir/lib/Bindings/Python/IRAttributes.cpp b/mlir/lib/Bindings/Python/IRAttributes.cpp
--- a/mlir/lib/Bindings/Python/IRAttributes.cpp
+++ b/mlir/lib/Bindings/Python/IRAttributes.cpp
@@ -453,9 +453,9 @@
         "value",
         [](PyFlatSymbolRefAttribute &self) {
           MlirStringRef stringRef = mlirFlatSymbolRefAttrGetValue(self);
-          return py::str(stringRef.data, stringRef.length);
+          return py::bytes(stringRef.data, stringRef.length);
         },
-        "Returns the value of the FlatSymbolRef attribute as a string");
+        "Returns the value of the FlatSymbolRef attribute as `bytes`");
   }
 };
 
@@ -483,16 +483,16 @@
         "dialect_namespace",
         [](PyOpaqueAttribute &self) {
           MlirStringRef stringRef = mlirOpaqueAttrGetDialectNamespace(self);
-          return py::str(stringRef.data, stringRef.length);
+          return py::bytes(stringRef.data, stringRef.length);
         },
-        "Returns the dialect namespace for the Opaque attribute as a string");
+        "Returns the dialect namespace for the Opaque attribute as `bytes`");
     c.def_property_readonly(
         "data",
         [](PyOpaqueAttribute &self) {
           MlirStringRef stringRef = mlirOpaqueAttrGetData(self);
-          return py::str(stringRef.data, stringRef.length);
+          return py::bytes(stringRef.data, stringRef.length);
         },
-        "Returns the data for the Opaqued attributes as a string");
+        "Returns the data for the Opaqued attributes as `bytes`");
   }
 };
 
@@ -525,9 +525,9 @@
         "value",
         [](PyStringAttribute &self) {
           MlirStringRef stringRef = mlirStringAttrGetValue(self);
-          return py::str(stringRef.data, stringRef.length);
+          return py::bytes(stringRef.data, stringRef.length);
         },
-        "Returns the value of the string attribute");
+        "Returns the value of the string attribute as `bytes`");
   }
 };
 
diff --git a/mlir/lib/Bindings/Python/IRCore.cpp b/mlir/lib/Bindings/Python/IRCore.cpp
--- a/mlir/lib/Bindings/Python/IRCore.cpp
+++ b/mlir/lib/Bindings/Python/IRCore.cpp
@@ -2431,7 +2431,7 @@
                              [](PyDialectDescriptor &self) {
                                MlirStringRef ns =
                                    mlirDialectGetNamespace(self.get());
-                               return py::str(ns.data, ns.length);
+                               return py::bytes(ns.data, ns.length);
                              })
       .def("__repr__", [](PyDialectDescriptor &self) {
         MlirStringRef ns = mlirDialectGetNamespace(self.get());
@@ -2823,7 +2823,7 @@
                                MlirOperation operation = self.get();
                                MlirStringRef name = mlirIdentifierStr(
                                    mlirOperationGetName(operation));
-                               return py::str(name.data, name.length);
+                               return py::bytes(name.data, name.length);
                              })
       .def_property_readonly(
           "context",
@@ -3174,8 +3174,8 @@
              PyPrintAccumulator printAccum;
              printAccum.parts.append("NamedAttribute(");
              printAccum.parts.append(
-                 py::str(mlirIdentifierStr(self.namedAttr.name).data,
-                         mlirIdentifierStr(self.namedAttr.name).length));
+                 py::bytes(mlirIdentifierStr(self.namedAttr.name).data,
+                           mlirIdentifierStr(self.namedAttr.name).length));
              printAccum.parts.append("=");
              mlirAttributePrint(self.namedAttr.attribute,
                                 printAccum.getCallback(),
@@ -3186,8 +3186,8 @@
       .def_property_readonly(
           "name",
           [](PyNamedAttribute &self) {
-            return py::str(mlirIdentifierStr(self.namedAttr.name).data,
-                           mlirIdentifierStr(self.namedAttr.name).length);
+            return py::bytes(mlirIdentifierStr(self.namedAttr.name).data,
+                             mlirIdentifierStr(self.namedAttr.name).length);
           },
           "The name of the NamedAttribute binding")
       .def_property_readonly(
diff --git a/mlir/lib/Bindings/Python/IRTypes.cpp b/mlir/lib/Bindings/Python/IRTypes.cpp
--- a/mlir/lib/Bindings/Python/IRTypes.cpp
+++ b/mlir/lib/Bindings/Python/IRTypes.cpp
@@ -696,16 +696,16 @@
         "dialect_namespace",
         [](PyOpaqueType &self) {
           MlirStringRef stringRef = mlirOpaqueTypeGetDialectNamespace(self);
-          return py::str(stringRef.data, stringRef.length);
+          return py::bytes(stringRef.data, stringRef.length);
         },
-        "Returns the dialect namespace for the Opaque type as a string.");
+        "Returns the dialect namespace for the Opaque type as `bytes`.");
     c.def_property_readonly(
         "data",
         [](PyOpaqueType &self) {
           MlirStringRef stringRef = mlirOpaqueTypeGetData(self);
-          return py::str(stringRef.data, stringRef.length);
+          return py::bytes(stringRef.data, stringRef.length);
         },
-        "Returns the data for the Opaque type as a string.");
+        "Returns the data for the Opaque type as `bytes`.");
   }
 };