diff --git a/pytato/array.py b/pytato/array.py
index c1bdb7d52..75fb16e0e 100644
--- a/pytato/array.py
+++ b/pytato/array.py
@@ -177,7 +177,15 @@
 import operator
 import re
 from abc import ABC, abstractmethod
-from collections.abc import Callable, Collection, Iterable, Iterator, Mapping, Sequence
+from collections.abc import (
+    Callable,
+    Collection,
+    Iterable,
+    Iterator,
+    KeysView,
+    Mapping,
+    Sequence,
+)
 from functools import cached_property, partialmethod
 from sys import intern
 from typing import (
@@ -923,6 +931,7 @@ class AbstractResultWithNamedArrays(Mapping[str, NamedArray], Taggable, ABC):
     .. automethod:: __contains__
     .. automethod:: __getitem__
     .. automethod:: __len__
+    .. automethod:: keys
 
     .. note::
 
@@ -961,6 +970,11 @@ def __eq__(self, other: Any) -> bool:
         from pytato.equality import EqualityComparer
         return EqualityComparer()(self, other)
 
+    @abstractmethod
+    def keys(self) -> KeysView[str]:
+        """Return a :class:`KeysView` of the names of the named arrays."""
+        pass
+
 
 @dataclasses.dataclass(frozen=True, eq=False, init=False)
 class DictOfNamedArrays(AbstractResultWithNamedArrays):
@@ -1009,7 +1023,12 @@ def __iter__(self) -> Iterator[str]:
         return iter(self._data)
 
     def __repr__(self) -> str:
-        return "DictOfNamedArrays(" + str(self._data) + ")"
+        return f"DictOfNamedArrays(tags={self.tags!r}, data={self._data!r})"
+
+    # Note: items() and values() are not implemented here, they go through
+    # __iter__()/__getitem__() above.
+    def keys(self) -> KeysView[str]:
+        return self._data.keys()
 
 # }}}
 
diff --git a/pytato/function.py b/pytato/function.py
index 3450e62e6..c96070bf5 100644
--- a/pytato/function.py
+++ b/pytato/function.py
@@ -58,7 +58,14 @@
 import dataclasses
 import enum
 import re
-from collections.abc import Callable, Hashable, Iterable, Iterator, Mapping
+from collections.abc import (
+    Callable,
+    Hashable,
+    Iterable,
+    Iterator,
+    KeysView,
+    Mapping,
+)
 from functools import cached_property
 from typing import (
     Any,
@@ -339,6 +346,9 @@ def __len__(self) -> int:
     def _with_new_tags(self: Call, tags: frozenset[Tag]) -> Call:
         return dataclasses.replace(self, tags=tags)
 
+    def keys(self) -> KeysView[str]:
+        return self.function.returns.keys()
+
 # }}}
 
 
diff --git a/pytato/loopy.py b/pytato/loopy.py
index 30cc69128..5bb86fcd1 100644
--- a/pytato/loopy.py
+++ b/pytato/loopy.py
@@ -149,6 +149,10 @@ def __len__(self) -> int:
     def __iter__(self) -> Iterator[str]:
         return iter(self._result_names)
 
+    # type-ignore-reason: AbstractResultWithNamedArrays returns a KeysView here
+    def keys(self) -> frozenset[str]:  # type: ignore[override]
+        return self._result_names
+
 
 @array_dataclass()
 # https://github.com/python/mypy/issues/18115
diff --git a/pytato/scalar_expr.py b/pytato/scalar_expr.py
index 079430867..2e66828cd 100644
--- a/pytato/scalar_expr.py
+++ b/pytato/scalar_expr.py
@@ -10,7 +10,7 @@
 
 .. class:: Expression
 
-    See :attr:`pymbolic.typing.Expression`.
+    See :data:`pymbolic.typing.Expression`.
 """
 
 # FIXME: Unclear why the direct links to pymbolic don't work
diff --git a/requirements.txt b/requirements.txt
index 043cbf347..b1f1df20a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-git+https://github.com/inducer/pytools.git#egg=pytools >= 2024.1.14
+git+https://github.com/inducer/pytools.git#egg=pytools
 git+https://github.com/inducer/pymbolic.git#egg=pymbolic
 git+https://github.com/inducer/genpy.git#egg=genpy
 git+https://github.com/inducer/loopy.git#egg=loopy