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Support type stub generation for staticmethod #14934

Merged
merged 13 commits into from
Jan 8, 2024
Merged

Support type stub generation for staticmethod #14934

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bb15d87
Add test for static methods of pybind11 class
Mar 21, 2023
feebc70
Fix is_staticmethod for c modules
Nov 7, 2023
a634dee
Updated stub files for stubgen test
Nov 7, 2023
cae94e6
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Nov 7, 2023
1aacfcc
Fix failing type check
Nov 7, 2023
32389c1
Merge branch 'support_staticmethod' of https://github.com/WeilerMarce…
Nov 7, 2023
8142772
dummy
Nov 7, 2023
bc42c57
dummy to rerun unstable macos tests
Nov 8, 2023
8121e3c
Simplify is_staticmethod check
Nov 9, 2023
2504078
Add type hint for mapping proxies
Nov 15, 2023
e33685c
Merge remote-tracking branch 'origin/master' into support_staticmethod
Dec 4, 2023
e6f61ec
Fix stubgenc docstring test
Dec 5, 2023
14fd95c
Replace string comparison by isinstance
Jan 8, 2024
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1 change: 1 addition & 0 deletions mypy/stubgen.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1629,6 +1629,7 @@ def generate_stubs(options: Options) -> None:
doc_dir=options.doc_dir,
include_private=options.include_private,
export_less=options.export_less,
include_docstrings=options.include_docstrings,
)
num_modules = len(all_modules)
if not options.quiet and num_modules > 0:
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14 changes: 9 additions & 5 deletions mypy/stubgenc.py
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Expand Up @@ -508,12 +508,14 @@ def is_classmethod(self, class_info: ClassInfo, name: str, obj: object) -> bool:
return inspect.ismethod(obj)

def is_staticmethod(self, class_info: ClassInfo | None, name: str, obj: object) -> bool:
if self.is_c_module:
if class_info is None:
return False
elif self.is_c_module:
raw_lookup = getattr(class_info.cls, "__dict__") # noqa: B009
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Why has this been # noqa'd? Wouldn't it be cleaner to do this, as the linter suggests?

Suggested change
raw_lookup = getattr(class_info.cls, "__dict__") # noqa: B009
raw_lookup = class_info.cls.__dict__

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@WeilerMarcel WeilerMarcel Nov 9, 2023 •
edited
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To be honest, I wrote it that way because there are two other places in stubgenc.py where this pattern was used:

  • mypy/mypy/stubgenc.py

    Lines 453 to 455 in 8121e3c

    def get_members(self, obj: object) -> list[tuple[str, Any]]:
    obj_dict: Mapping[str, Any] = getattr(obj, "__dict__") # noqa: B009
    results = []

  • mypy/mypy/stubgenc.py

    Lines 718 to 725 in 8121e3c

    def generate_class_stub(self, class_name: str, cls: type, output: list[str]) -> None:
    """Generate stub for a single class using runtime introspection.
    The result lines will be appended to 'output'. If necessary, any
    required names will be added to 'imports'.
    """
    raw_lookup = getattr(cls, "__dict__") # noqa: B009
    items = self.get_members(cls)

    I will check the file history to see if I can find a specific reason why getattr is used.

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@WeilerMarcel WeilerMarcel Nov 10, 2023 •
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The getattr call originally comes from commit 6bcaf40 and was added to make typeshed happy:

mypy/mypy/stubgenc.py

Lines 140 to 142 in 6bcaf40

# typeshed gives obj.__dict__ the not quite correct type Dict[str, Any]
# (it could be a mappingproxy!), which makes mypyc mad, so obfuscate it.
obj_dict = getattr(obj, '__dict__') # type: Mapping[str, Any]

The # noqa was added in 4287af4:

mypy/mypy/stubgenc.py

Line 246 in 4287af4

obj_dict = getattr(obj, '__dict__') # type: Mapping[str, Any] # noqa

raw_value = raw_lookup.get(name, obj)
return type(raw_value).__name__ in ("staticmethod")
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else:
return class_info is not None and isinstance(
inspect.getattr_static(class_info.cls, name), staticmethod
)
return isinstance(inspect.getattr_static(class_info.cls, name), staticmethod)

@staticmethod
def is_abstract_method(obj: object) -> bool:
Expand Down Expand Up @@ -751,7 +753,9 @@ def generate_class_stub(self, class_name: str, cls: type, output: list[str]) ->
continue
attr = "__init__"
# FIXME: make this nicer
if self.is_classmethod(class_info, attr, value):
if self.is_staticmethod(class_info, attr, value):
class_info.self_var = ""
elif self.is_classmethod(class_info, attr, value):
class_info.self_var = "cls"
else:
class_info.self_var = "self"
Expand Down
15 changes: 15 additions & 0 deletions test-data/pybind11_mypy_demo/src/main.cpp
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Expand Up @@ -112,6 +112,13 @@ const Point Point::y_axis = Point(0, 1);
Point::LengthUnit Point::length_unit = Point::LengthUnit::mm;
Point::AngleUnit Point::angle_unit = Point::AngleUnit::radian;

struct Foo
{
static int some_static_method(int a, int b) { return a * 42 + b; }
static int overloaded_static_method(int value) { return value * 42; }
static double overloaded_static_method(double value) { return value * 42; }
};

} // namespace: basics

void bind_basics(py::module& basics) {
Expand Down Expand Up @@ -159,6 +166,14 @@ void bind_basics(py::module& basics) {
.value("radian", Point::AngleUnit::radian)
.value("degree", Point::AngleUnit::degree);

// Static methods
py::class_<Foo> pyFoo(basics, "Foo");

pyFoo
.def_static("some_static_method", &Foo::some_static_method, R"#(None)#", py::arg("a"), py::arg("b"))
.def_static("overloaded_static_method", py::overload_cast<int>(&Foo::overloaded_static_method), py::arg("value"))
.def_static("overloaded_static_method", py::overload_cast<double>(&Foo::overloaded_static_method), py::arg("value"));

// Module-level attributes
basics.attr("PI") = std::acos(-1);
basics.attr("__version__") = "0.0.1";
Expand Down
1 change: 1 addition & 0 deletions test-data/pybind11_mypy_demo/stubgen-include-docs/pybind11_mypy_demo/__init__.pyi
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@@ -0,0 +1 @@
from . import basics as basics
58 changes: 40 additions & 18 deletions test-data/pybind11_mypy_demo/stubgen-include-docs/pybind11_mypy_demo/basics.pyi
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Original file line number Diff line number Diff line change
@@ -1,7 +1,34 @@
from typing import ClassVar
from typing import ClassVar, overload

from typing import overload
PI: float
__version__: str

class Foo:
def __init__(self, *args, **kwargs) -> None:
"""Initialize self. See help(type(self)) for accurate signature."""
@overload
@staticmethod
def overloaded_static_method(value: int) -> int:
"""overloaded_static_method(*args, **kwargs)
Overloaded function.

1. overloaded_static_method(value: int) -> int

2. overloaded_static_method(value: float) -> float"""
@overload
@staticmethod
def overloaded_static_method(value: float) -> float:
"""overloaded_static_method(*args, **kwargs)
Overloaded function.

1. overloaded_static_method(value: int) -> int

2. overloaded_static_method(value: float) -> float"""
@staticmethod
def some_static_method(a: int, b: int) -> int:
"""some_static_method(a: int, b: int) -> int

None"""

class Point:
class AngleUnit:
Expand All @@ -13,8 +40,6 @@ class Point:
"""__init__(self: pybind11_mypy_demo.basics.Point.AngleUnit, value: int) -> None"""
def __eq__(self, other: object) -> bool:
"""__eq__(self: object, other: object) -> bool"""
def __getstate__(self) -> int:
"""__getstate__(self: object) -> int"""
def __hash__(self) -> int:
"""__hash__(self: object) -> int"""
def __index__(self) -> int:
Expand All @@ -23,8 +48,6 @@ class Point:
"""__int__(self: pybind11_mypy_demo.basics.Point.AngleUnit) -> int"""
def __ne__(self, other: object) -> bool:
"""__ne__(self: object, other: object) -> bool"""
def __setstate__(self, state: int) -> None:
"""__setstate__(self: pybind11_mypy_demo.basics.Point.AngleUnit, state: int) -> None"""
@property
def name(self) -> str: ...
@property
Expand All @@ -40,8 +63,6 @@ class Point:
"""__init__(self: pybind11_mypy_demo.basics.Point.LengthUnit, value: int) -> None"""
def __eq__(self, other: object) -> bool:
"""__eq__(self: object, other: object) -> bool"""
def __getstate__(self) -> int:
"""__getstate__(self: object) -> int"""
def __hash__(self) -> int:
"""__hash__(self: object) -> int"""
def __index__(self) -> int:
Expand All @@ -50,8 +71,6 @@ class Point:
"""__int__(self: pybind11_mypy_demo.basics.Point.LengthUnit) -> int"""
def __ne__(self, other: object) -> bool:
"""__ne__(self: object, other: object) -> bool"""
def __setstate__(self, state: int) -> None:
"""__setstate__(self: pybind11_mypy_demo.basics.Point.LengthUnit, state: int) -> None"""
@property
def name(self) -> str: ...
@property
Expand All @@ -70,43 +89,46 @@ class Point:

1. __init__(self: pybind11_mypy_demo.basics.Point) -> None

2. __init__(self: pybind11_mypy_demo.basics.Point, x: float, y: float) -> None"""
2. __init__(self: pybind11_mypy_demo.basics.Point, x: float, y: float) -> None
"""
@overload
def __init__(self, x: float, y: float) -> None:
"""__init__(*args, **kwargs)
Overloaded function.

1. __init__(self: pybind11_mypy_demo.basics.Point) -> None

2. __init__(self: pybind11_mypy_demo.basics.Point, x: float, y: float) -> None"""
2. __init__(self: pybind11_mypy_demo.basics.Point, x: float, y: float) -> None
"""
@overload
def distance_to(self, x: float, y: float) -> float:
"""distance_to(*args, **kwargs)
Overloaded function.

1. distance_to(self: pybind11_mypy_demo.basics.Point, x: float, y: float) -> float

2. distance_to(self: pybind11_mypy_demo.basics.Point, other: pybind11_mypy_demo.basics.Point) -> float"""
2. distance_to(self: pybind11_mypy_demo.basics.Point, other: pybind11_mypy_demo.basics.Point) -> float
"""
@overload
def distance_to(self, other: Point) -> float:
"""distance_to(*args, **kwargs)
Overloaded function.

1. distance_to(self: pybind11_mypy_demo.basics.Point, x: float, y: float) -> float

2. distance_to(self: pybind11_mypy_demo.basics.Point, other: pybind11_mypy_demo.basics.Point) -> float"""
2. distance_to(self: pybind11_mypy_demo.basics.Point, other: pybind11_mypy_demo.basics.Point) -> float
"""
@property
def length(self) -> float: ...

def answer() -> int:
'''answer() -> int
"""answer() -> int"""

answer docstring, with end quote"'''
def midpoint(left: float, right: float) -> float:
"""midpoint(left: float, right: float) -> float"""

def sum(arg0: int, arg1: int) -> int:
'''sum(arg0: int, arg1: int) -> int
"""sum(arg0: int, arg1: int) -> int"""

multiline docstring test, edge case quotes """\'\'\''''
def weighted_midpoint(left: float, right: float, alpha: float = ...) -> float:
"""weighted_midpoint(left: float, right: float, alpha: float = 0.5) -> float"""
11 changes: 11 additions & 0 deletions test-data/pybind11_mypy_demo/stubgen/pybind11_mypy_demo/basics.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,17 @@ from typing import ClassVar, overload
PI: float
__version__: str

class Foo:
def __init__(self, *args, **kwargs) -> None: ...
@overload
@staticmethod
def overloaded_static_method(value: int) -> int: ...
@overload
@staticmethod
def overloaded_static_method(value: float) -> float: ...
@staticmethod
def some_static_method(a: int, b: int) -> int: ...

class Point:
class AngleUnit:
__members__: ClassVar[dict] = ... # read-only
Expand Down