Exclude unassigned type-annotated class attributes from enum __members__ container (#2263)

* Exclude type-annotated class attributes, which have no assigned value, from the ``__members__`` container of an ``Enum`` class.

Refs pylint-dev/pylint#7402

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Fix exising test.

The value if now `Uninferable` in the case of
an annotated attribute of an `enum.Enum` class with no assigned value.

* Update astroid/brain/brain_namedtuple_enum.py

Co-authored-by: Jacob Walls <[email protected]>

* Update tests.

* Update test: Use `infer()` instead of `inferred()`.

* Update type annotations of PEP 695 nodes (#2264)

These attributes cannot be none in real-world situations,
see python/cpython#106145.

* Update sphinx requirement from ~=7.0 to ~=7.1 (#2265)

Updates the requirements on [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES)
- [Commits](sphinx-doc/sphinx@v7.0.0...v7.1.1)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Ensure a node is inferred in the case when there is only one member.

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Undo unintended changes.

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Jacob Walls <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: 4 people

ChangeLog

@@ -19,6 +19,11 @@ Release date: TBA
 
   Refs #2137
 
+* Exclude class attributes from the ``__members__`` container of an ``Enum`` class when they are
+  ``nodes.AnnAssign`` nodes with no assigned value.
+
+  Refs pylint-dev/pylint#7402
+
 * Remove ``@cached`` and ``@cachedproperty`` decorator (just use ``@cached_property`` from the stdlib).
 
   Closes #1780

astroid/brain/brain_namedtuple_enum.py

@@ -462,6 +462,8 @@ def name(self):
                 for method in node.mymethods():
                     fake.locals[method.name] = [method]
                 new_targets.append(fake.instantiate_class())
+                if stmt.value is None:
+                    continue
                 dunder_members[local] = fake
             node.locals[local] = new_targets
 

tests/brain/test_enum.py

@@ -493,3 +493,31 @@ def pear(self):
         for node in (attribute_nodes[1], name_nodes[1]):
             with pytest.raises(InferenceError):
                 node.inferred()
+
+    def test_enum_members_uppercase_only(self) -> None:
+        """Originally reported in https://github.com/pylint-dev/pylint/issues/7402.
+        ``nodes.AnnAssign`` nodes with no assigned values do not appear inside ``__members__``.
+
+        Test that only enum members `MARS` and `radius` appear in the `__members__` container while
+        the attribute `mass` does not.
+        """
+        enum_class = astroid.extract_node(
+            """
+        from enum import Enum
+        class Planet(Enum): #@
+            MARS = (1, 2)
+            radius: int = 1
+            mass: int
+
+            def __init__(self, mass, radius):
+                self.mass = mass
+                self.radius = radius
+
+        Planet.MARS.value
+        """
+        )
+        enum_members = next(enum_class.igetattr("__members__"))
+        assert len(enum_members.items) == 2
+        mars, radius = enum_members.items
+        assert mars[1].name == "MARS"
+        assert radius[1].name == "radius"