Cleanup and typing

Author: sveinugu

src/omnipy/data/helpers.py

@@ -148,8 +148,11 @@ def get_special_methods_info_dict() -> dict[str, MethodInfo]:
     '_pydevd_bundle.pydevd_exec2',
 ]
 validate_cls_counts: defaultdict[str, int] = defaultdict(int)
-ResetSolutionTuple = NamedTuple('ResetSolutionTuple', [('reset_solution', ContextManager[None]),
-                                                       ('snapshot_taken', bool)])
+
+
+class ResetSolutionTuple(NamedTuple):
+    reset_solution: ContextManager[None]
+    snapshot_taken: bool
 
 
 def debug_get_sorted_validate_counts() -> dict[str, int]:

src/omnipy/data/model.py

@@ -37,7 +37,6 @@
 from omnipy.api.protocols.private.util import IsSnapshotWrapper
 from omnipy.api.typedefs import TypeForm
 from omnipy.data.data_class_creator import DataClassBase, DataClassBaseMeta
-from omnipy.data.missing import parse_none_according_to_model
 from omnipy.data.helpers import (cleanup_name_qualname_and_module,
                                  get_special_methods_info_dict,
                                  get_terminal_size,
@@ -48,6 +47,7 @@
                                  validate_cls_counts,
                                  waiting_for_terminal_repr,
                                  YesNoMaybe)
+from omnipy.data.missing import parse_none_according_to_model
 from omnipy.util.contexts import (hold_and_reset_prev_attrib_value,
                                   LastErrorHolder,
                                   nothing,

src/omnipy/util/helpers.py

@@ -29,6 +29,7 @@
                     Mapping,
                     overload,
                     Protocol,
+                    TypeGuard,
                     TypeVar,
                     Union)
 from weakref import WeakKeyDictionary, WeakValueDictionary
@@ -50,6 +51,8 @@
 _ValT = TypeVar('_ValT', bound=object)
 _ContentsT = TypeVar('_ContentsT', bound=object)
 
+T = TypeVar('T')
+
 Dictable = Mapping[_KeyT, Any] | Iterable[tuple[_KeyT, Any]]
 
 
@@ -204,9 +207,9 @@ def all_type_variants(
         return (cast(type | GenericAlias, in_type),)
 
 
-def is_iterable(obj: object) -> bool:
+def is_iterable(obj: Iterable[T] | T) -> TypeGuard[Iterable[T]]:
     try:
-        iter(obj)  # type: ignore[call-overload]
+        iter(obj)  # type: ignore[arg-type]
         return True
     except TypeError:
         return False