helpers and pythonic

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

Author: jkowalleck

cyclonedx/model/tool.py

@@ -19,7 +19,6 @@
 from collections.abc import Iterable
 from itertools import chain
 from typing import TYPE_CHECKING, Any, Optional, Union
-from warnings import warn
 from xml.etree.ElementTree import Element  # nosec B405
 
 import py_serializable as serializable

cyclonedx/schema/deprecation.py

@@ -43,7 +43,7 @@ def _warn(cls, deprecated: str, instead: Optional[str] = None,
         msg = f'`{deprecated}` is deprecated from CycloneDX v{cls.SCHEMA_VERSION.to_version()} onwards.'
         if instead:
             msg += f' Please use `{instead}` instead.'
-        warn(msg, cls, stacklevel=stacklevel + 1)
+        warn(msg, category=cls, stacklevel=stacklevel + 1)
 
 
 class DeprecationWarning1Dot7(SchemaDeprecationWarning):