Update combomethod type hints

eth_utils/decorators.py

@@ -1,19 +1,23 @@
 import functools
 import itertools
-from typing import Any, Callable, Dict, Type, TypeVar
+from typing import Any, Callable, Dict, Generic, Type, TypeVar, Union
+from typing_extensions import Concatenate, ParamSpec
 
 from .types import is_text
 
 T = TypeVar("T")
+P = ParamSpec("P")
 
 
-class combomethod(object):
-    def __init__(self, method: Callable[..., Any]) -> None:
+class combomethod(Generic[P, T], object):
+    def __init__(self, method: Callable[Concatenate[Any, P], T]) -> None:
         self.method = method
 
-    def __get__(self, obj: T = None, objtype: Type[T] = None) -> Callable[..., Any]:
+    def __get__(
+        self, obj: object = None, objtype: Union[type, None] = None
+    ) -> Callable[P, T]:
         @functools.wraps(self.method)
-        def _wrapper(*args: Any, **kwargs: Any) -> Any:
+        def _wrapper(*args: P.args, **kwargs: P.kwargs) -> T:
             if obj is not None:
                 return self.method(obj, *args, **kwargs)
             else:

setup.py

@@ -17,7 +17,7 @@
         "black>=18.6b4,<19",
         "flake8==3.7.9",
         "isort>=4.2.15,<5",
-        "mypy==0.910",
+        "mypy==0.971",
         "pydocstyle>=5.0.0,<6",
         "pytest>=6.2.5,<7",
         "types-setuptools",
@@ -67,6 +67,7 @@
         "eth-typing>=3.0.0,<4.0.0",
         "toolz>0.8.2,<1;implementation_name=='pypy'",
         "cytoolz>=0.10.1,<1.0.0;implementation_name=='cpython'",
+        "typing-extensions>=4.1.0",
     ],
     python_requires=">=3.6,<4",
     extras_require=extras_require,