typechecking tweaks

src/poetry/factory.py

@@ -293,14 +293,15 @@ class Factory(BaseFactory):
         if extras_section:
             content["extras"] = extras_section
 
-        pyproject.add(tomlkit.nl())  # type: ignore[attr-defined]
+        pyproject = cast(TOMLDocument, pyproject)
+        pyproject.add(tomlkit.nl())
 
         if path:
             path.joinpath("pyproject.toml").write_text(
-                pyproject.as_string(), encoding="utf-8"  # type: ignore[attr-defined]
+                pyproject.as_string(), encoding="utf-8"
             )
 
-        return cast(TOMLDocument, pyproject)
+        return pyproject
 
     @classmethod
     def validate(

src/poetry/mixology/assignment.py

 from __future__ import annotations
 
 from typing import TYPE_CHECKING
-from typing import Any
 
 from poetry.mixology.term import Term
 
@@ -51,7 +50,7 @@ class Assignment(Term):
     @classmethod
     def derivation(
         cls,
-        dependency: Any,
+        dependency: Dependency,
         is_positive: bool,
         cause: Incompatibility,
         decision_level: int,

src/poetry/packages/package_collection.py

 from __future__ import annotations
 
 from typing import TYPE_CHECKING
+from typing import List
 
 from poetry.packages.dependency_package import DependencyPackage
 
@@ -12,7 +13,7 @@ if TYPE_CHECKING:
     from poetry.core.packages.package import Package
 
 
-class PackageCollection(list):  # type: ignore[type-arg]
+class PackageCollection(List[DependencyPackage]):
     def __init__(
         self,
         dependency: Dependency,

src/poetry/puzzle/provider.py

@@ -12,7 +12,6 @@ from collections import defaultdict
 from contextlib import contextmanager
 from pathlib import Path
 from typing import TYPE_CHECKING
-from typing import Any
 from typing import cast
 
 from cleo.ui.progress_indicator import ProgressIndicator
@@ -45,6 +44,7 @@ if TYPE_CHECKING:
     from collections.abc import Iterable
     from collections.abc import Iterator
 
+    from cleo.io.io import IO
     from poetry.core.packages.dependency import Dependency
     from poetry.core.packages.package import Package
     from poetry.core.packages.specification import PackageSpecification
@@ -125,7 +125,7 @@ class Provider:
         self,
         package: Package,
         pool: Pool,
-        io: Any,
+        io: IO,
         env: Env | None = None,
         installed: Repository | None = None,
     ) -> None: