Eric's feedback.

# Rust tests and lints will be skipped. Delete if not intended.
[ci skip-rust]

# Building wheels and fs_util will be skipped. Delete if not intended.
[ci skip-build-wheels]

src/python/pants/backend/codegen/protobuf/python/rules.py

@@ -106,6 +106,12 @@ async def generate_python_from_protobuf(
                     output_filename="mypy_protobuf.pex",
                     internal_only=True,
                     requirements=PexRequirements([python_protobuf_subsystem.mypy_plugin_version]),
+                    # TODO(John Sirois): Fix these interpreter constraints to track the actual
+                    #  python requirement of the mypy_plugin_version or else plumb an option for
+                    #  manually setting the constraint to track what mypy_plugin_version needs:
+                    #  https://github.com/pantsbuild/pants/issues/11565
+                    # Here we guess a constraint that will likely work with any mypy_plugin_version
+                    # selected.
                     interpreter_constraints=PexInterpreterConstraints(["CPython>=3.5"]),
                 ),
             ),

src/python/pants/backend/python/util_rules/pex_test.py

@@ -8,7 +8,7 @@
 import textwrap
 import zipfile
 from dataclasses import dataclass
-from typing import Dict, Iterable, Iterator, List, Mapping, Optional, Tuple, cast
+from typing import Dict, Iterable, Iterator, List, Mapping, Tuple, cast
 
 import pytest
 from pkg_resources import Requirement
@@ -222,7 +222,7 @@ class MockFieldSet(FieldSet):
     interpreter_constraints: InterpreterConstraintsField
 
     @classmethod
-    def create_for_test(cls, address: Address, compat: Optional[str]) -> MockFieldSet:
+    def create_for_test(cls, address: Address, compat: str | None) -> MockFieldSet:
         return cls(
             address=address,
             interpreter_constraints=InterpreterConstraintsField(
@@ -326,14 +326,14 @@ def create_pex_and_get_all_data(
     *,
     pex_type: type[Pex | VenvPex] = Pex,
     requirements: PexRequirements = PexRequirements(),
-    entry_point: Optional[str] = None,
+    entry_point: str | None = None,
     interpreter_constraints: PexInterpreterConstraints = PexInterpreterConstraints(),
     platforms: PexPlatforms = PexPlatforms(),
-    sources: Optional[Digest] = None,
-    additional_inputs: Optional[Digest] = None,
+    sources: Digest | None = None,
+    additional_inputs: Digest | None = None,
     additional_pants_args: Tuple[str, ...] = (),
     additional_pex_args: Tuple[str, ...] = (),
-    env: Optional[Mapping[str, str]] = None,
+    env: Mapping[str, str] | None = None,
     internal_only: bool = True,
 ) -> Dict:
     request = PexRequest(
@@ -376,10 +376,10 @@ def create_pex_and_get_pex_info(
     *,
     pex_type: type[Pex | VenvPex] = Pex,
     requirements: PexRequirements = PexRequirements(),
-    entry_point: Optional[str] = None,
+    entry_point: str | None = None,
     interpreter_constraints: PexInterpreterConstraints = PexInterpreterConstraints(),
     platforms: PexPlatforms = PexPlatforms(),
-    sources: Optional[Digest] = None,
+    sources: Digest | None = None,
     additional_pants_args: Tuple[str, ...] = (),
     additional_pex_args: Tuple[str, ...] = (),
     internal_only: bool = True,