feat: add get_attrs, get_or_set_attr

src/snakia/utils/__init__.py

@@ -1,3 +1,4 @@
+from .attr import get_attrs, get_or_set_attr
 from .frame import frame
 from .inherit import inherit
 from .nolock import nolock
@@ -6,6 +7,8 @@ from .throw import throw
 from .to_async import to_async
 
 __all__ = [
+    "get_or_set_attr",
+    "get_attrs",
     "frame",
     "inherit",
     "nolock",

src/snakia/utils/attr.py

@@ -0,0 +1,28 @@
+from typing import Any, TypeVar
+
+T = TypeVar("T")
+
+
+def get_or_set_attr(obj: Any, name: str, default: T) -> T:
+    if not hasattr(obj, name):
+        setattr(obj, name, default)
+    attr = getattr(obj, name)
+    if not isinstance(attr, type(default)):
+        setattr(obj, name, default)
+        return default
+    return attr
+
+
+def get_attrs(
+    obj: Any, *, use_dir: bool = False, of_class: bool = False
+) -> dict[str, Any]:
+    if of_class and not isinstance(obj, type):
+        obj = obj.__class__
+    if not use_dir:
+        if hasattr(obj, "__dict__"):
+            return obj.__dict__  # type: ignore
+        if hasattr(obj, "__slots__"):
+            return {k: getattr(obj, k) for k in obj.__slots__}
+        raise NotImplementedError("Unknown layout")
+    else:
+        return {k: getattr(obj, k) for k in dir(obj)}