feat: replaced create_boxed() with metaclasses, better for mypy

Author: ntamas

pyproject.toml

@@ -3,14 +3,12 @@ name = "igraph_ctypes"
 version = "0.0.0.post58.dev0+4ca9643"
 description = ""
 authors = ["Tamas Nepusz <[email protected]>"]
-packages = [
-    { include = "igraph_ctypes", from = "src" }
-]
+packages = [{ include = "igraph_ctypes", from = "src" }]
 
 [tool.poetry.dependencies]
 python = "^3.10"
 numpy = "^1.23.3"
-pycapi = "^0.82.1"
+pycapi = ">=0.82.1"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.2.1"
@@ -25,6 +23,10 @@ enable = true
 [tool.poetry-dynamic-versioning.substitution]
 files = ["src/igraph_ctypes/_version.py"]
 
+[[tool.mypy.overrides]]
+module = "igraph_ctypes._internal.wrappers"
+ignore_missing_imports = true
+
 [tool.pytest.ini_options]
 addopts = "--cov-config=.coveragerc"
 
@@ -42,18 +44,22 @@ select = ["B", "C", "E", "F", "W"]
 legacy_tox_ini = """
 [tox]
 min_version = 4.0
-env_list = py311, py310
+env_list = py311, py310, type
 
 [gh-actions]
 python =
     3.10: py310
-    3.11: py311
+    3.11: py311, type
 
 [testenv]
 deps =
     pytest
     pytest-cov
 commands = pytest tests
+
+[testenv:type]
+deps = mypy
+commands = mypy src
 """
 
 [build-system]

src/codegen/internal_functions.py.in

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from ctypes import c_char_p, c_int
 from typing import Any, Iterable, List, Optional, Tuple, TYPE_CHECKING
 
 from .conversion import *  # noqa

src/codegen/internal_lib.py.in

@@ -1,13 +1,8 @@
-# type: ignore
-#
-# Type annotations are ignored in this file because pylance is not smart enough
-# to figure out that `restypes` and `argtypes` are valid for a function imported
-# from a library
-
 # fmt: off
 
 from ctypes import cdll, c_char_p, c_double, c_int, c_void_p, POINTER
 from ctypes.util import find_library
+from typing import Any
 
 from .attributes import (
     igraph_attribute_combination_t,
@@ -66,7 +61,7 @@ def _load_igraph_c_library():
     return lib
 
 
-_lib = _load_igraph_c_library()
+_lib: Any = _load_igraph_c_library()
 
 # Vector type
 

src/igraph_ctypes/_internal/attributes.py

@@ -8,10 +8,10 @@
     POINTER,
     Structure,
 )
-from dataclasses import dataclass, field, replace
+from dataclasses import dataclass, field
 from typing import Any, Callable, Dict, Optional
 
-from .refcount import incref, decref, refcount
+from .refcount import incref, decref
 from .types import (
     igraph_bool_t,
     igraph_error_t,
@@ -26,7 +26,7 @@
     igraph_vector_t,
     igraph_vs_t,
 )
-from .utils import protect
+from .utils import nop, protect
 
 __all__ = ("AttributeHandlerBase", "DictAttributeHandler")
 
@@ -176,9 +176,7 @@ def _get_attribute_handler_functions(self) -> Dict[str, Callable]:
         to register this attribute handler in the core igraph library.
         """
         return {
-            key: igraph_attribute_table_t.TYPES[key](
-                protect(getattr(self, key, self._nop))
-            )
+            key: igraph_attribute_table_t.TYPES[key](protect(getattr(self, key, nop)))
             for key in igraph_attribute_table_t.TYPES.keys()
         }
 
@@ -191,10 +189,6 @@ def _as_parameter_(self):
             self._table_ptr = pointer(self._table)
         return self._table_ptr
 
-    @staticmethod
-    def _nop():
-        pass
-
 
 @dataclass(frozen=True)
 class _DictAttributeStorage: