[typing] Fix minor typing of pip._internal sub packages utils, exceptions, locations, self_outdated_check

src/pip/_internal/exceptions.py

@@ -27,7 +27,7 @@
 if TYPE_CHECKING:
     from hashlib import _Hash
 
-    from pip._vendor.requests.models import Request, Response
+    from pip._vendor.requests.models import PreparedRequest, Request, Response
 
     from pip._internal.metadata import BaseDistribution
     from pip._internal.network.download import _FileDownload
@@ -314,7 +314,7 @@ def __init__(
         self,
         error_msg: str,
         response: Response | None = None,
-        request: Request | None = None,
+        request: Request | PreparedRequest | None = None,
     ) -> None:
         """
         Initialize NetworkConnectionError with  `request` and `response`

src/pip/_internal/locations/__init__.py

@@ -6,7 +6,6 @@
 import pathlib
 import sys
 import sysconfig
-from typing import Any
 
 from pip._internal.models.scheme import SCHEME_KEYS, Scheme
 from pip._internal.utils.compat import WINDOWS
@@ -134,7 +133,7 @@ def _looks_like_red_hat_scheme() -> bool:
     from distutils.command.install import install
     from distutils.dist import Distribution
 
-    cmd: Any = install(Distribution())
+    cmd = install(Distribution())
     cmd.finalize_options()
     return (
         cmd.exec_prefix == f"{os.path.normpath(sys.exec_prefix)}/local"

src/pip/_internal/locations/_sysconfig.py

@@ -4,6 +4,7 @@
 import os
 import sys
 import sysconfig
+from typing import Callable
 
 from pip._internal.exceptions import InvalidSchemeCombination, UserInstallationInvalid
 from pip._internal.models.scheme import SCHEME_KEYS, Scheme
@@ -24,7 +25,9 @@
 
 _AVAILABLE_SCHEMES = set(sysconfig.get_scheme_names())
 
-_PREFERRED_SCHEME_API = getattr(sysconfig, "get_preferred_scheme", None)
+_PREFERRED_SCHEME_API: Callable[[str], str] | None = getattr(
+    sysconfig, "get_preferred_scheme", None
+)
 
 
 def _should_use_osx_framework_prefix() -> bool:

src/pip/_internal/self_outdated_check.py

@@ -9,7 +9,7 @@
 import os.path
 import sys
 from dataclasses import dataclass
-from typing import Any, Callable
+from typing import Callable
 
 from pip._vendor.packaging.version import Version
 from pip._vendor.packaging.version import parse as parse_version
@@ -61,7 +61,7 @@ def _convert_date(isodate: str) -> datetime.datetime:
 
 class SelfCheckState:
     def __init__(self, cache_dir: str) -> None:
-        self._state: dict[str, Any] = {}
+        self._state: dict[str, str] = {}
         self._statefile_path = None
 
         # Try to load the existing state

src/pip/_internal/utils/misc.py

@@ -541,14 +541,18 @@ def __repr__(self) -> str:
     def __str__(self) -> str:
         return self.redacted
 
-    # This is useful for testing.
-    def __eq__(self, other: Any) -> bool:
-        if type(self) is not type(other):
-            return False
-
-        # The string being used for redaction doesn't also have to match,
-        # just the raw, original string.
-        return self.secret == other.secret
+    def __eq__(self, other: object) -> bool:
+        # Equality is particularly useful for testing.
+        if type(self) is type(other):
+            # The string being used for redaction doesn't also have to match,
+            # just the raw, original string.
+            return self.secret == cast(HiddenText, other).secret
+        return NotImplemented
+
+    # Disable hashing, since we have a custom __eq__ and don't need hash-ability
+    # (yet). The only required property of hashing is that objects which compare
+    # equal have the same hash value.
+    __hash__ = None  # type: ignore[assignment]
 
 
 def hide_value(value: str) -> HiddenText: