Add support for paramspec (#255)

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## 1.20
 
 - Use hatchling instead of setuptools
+- Add support for typing.ParamSpec
 
 ## 1.19.2
 

pyproject.toml

@@ -28,7 +28,7 @@ optional-dependencies.testing = [
   "sphobjinv>=2.2.2",
   "typing-extensions>=4.3",
 ]
-optional-dependencies.type_comment = ['typed-ast>=1.5.4; python_version < "3.8"']
+optional-dependencies.type-comment = ['typed-ast>=1.5.4; python_version < "3.8"']
 dynamic = ["version"]
 classifiers = [
   "Development Status :: 5 - Production/Stable",

src/sphinx_autodoc_typehints/__init__.py

@@ -26,7 +26,7 @@ def get_annotation_module(annotation: Any) -> str:
     if annotation is None:
         return "builtins"
     is_new_type = sys.version_info >= (3, 10) and isinstance(annotation, NewType)
-    if is_new_type or isinstance(annotation, TypeVar):
+    if is_new_type or isinstance(annotation, TypeVar) or type(annotation).__name__ == "ParamSpec":
         return "typing"
     if hasattr(annotation, "__module__"):
         return annotation.__module__  # type: ignore # deduced Any
@@ -63,8 +63,8 @@ def get_annotation_class_name(annotation: Any, module: str) -> str:
         elif getattr(origin, "_name", None):  # Required for Union on Python 3.7+
             return origin._name  # type: ignore # deduced Any
 
-    annotation_cls = annotation if inspect.isclass(annotation) else annotation.__class__
-    return annotation_cls.__qualname__.lstrip("_")  # type: ignore # deduced Any
+    annotation_cls = annotation if inspect.isclass(annotation) else type(annotation)
+    return annotation_cls.__qualname__.lstrip("_")
 
 
 def get_annotation_args(annotation: Any, module: str, class_name: str) -> tuple[Any, ...]:
@@ -153,7 +153,7 @@ def format_annotation(annotation: Any, config: Config) -> str:  # noqa: C901 # t
     if full_name == "typing.NewType":
         args_format = f"\\(``{annotation.__name__}``, {{}})"
         role = "class" if sys.version_info >= (3, 10) else "func"
-    elif full_name == "typing.TypeVar":
+    elif full_name in {"typing.TypeVar", "typing.ParamSpec"}:
         params = {k: getattr(annotation, f"__{k}__") for k in ("bound", "covariant", "contravariant")}
         params = {k: v for k, v in params.items() if v}
         if "bound" in params:

tests/test_sphinx_autodoc_typehints.py

@@ -56,6 +56,10 @@
 Z = TypeVar("Z", bound="A")
 S = TypeVar("S", bound="miss")  # type: ignore # miss not defined on purpose # noqa: F821
 W = NewType("W", str)
+P = typing_extensions.ParamSpec("P")
+P_co = typing_extensions.ParamSpec("P_co", covariant=True)  # type: ignore
+P_contra = typing_extensions.ParamSpec("P_contra", contravariant=True)  # type: ignore
+P_bound = typing_extensions.ParamSpec("P_bound", bound=str)  # type: ignore
 
 # Mypy does not support recursive type aliases, but
 # other type checkers do.
@@ -239,6 +243,11 @@ def test_parse_annotation(annotation: Any, module: str, class_name: str, args: t
         (Y, ":py:class:`~typing.TypeVar`\\(``Y``, bound= :py:class:`str`)"),
         (Z, ":py:class:`~typing.TypeVar`\\(``Z``, bound= A)"),
         (S, ":py:class:`~typing.TypeVar`\\(``S``, bound= miss)"),
+        # ParamSpec should behave like TypeVar, except for missing constraints
+        (P, ":py:class:`~typing.ParamSpec`\\(``P``)"),
+        (P_co, ":py:class:`~typing.ParamSpec`\\(``P_co``, covariant=True)"),
+        (P_contra, ":py:class:`~typing.ParamSpec`\\(``P_contra``, contravariant=True)"),
+        (P_bound, ":py:class:`~typing.ParamSpec`\\(``P_bound``, bound= :py:class:`str`)"),
         # ## These test for correct internal tuple rendering, even if not all are valid Tuple types
         # Zero-length tuple remains
         (Tuple[()], ":py:data:`~typing.Tuple`"),

tox.ini

@@ -22,7 +22,7 @@ setenv =
     COVERAGE_FILE = {toxworkdir}{/}.coverage.{envname}
 extras =
     testing
-    type_comments
+    type-comment
 commands =
     pytest {tty:--color=yes} {posargs: \
       --junitxml {toxworkdir}{/}junit.{envname}.xml --cov {envsitepackagesdir}{/}sphinx_autodoc_typehints --cov {toxinidir}{/}tests \