Remove support for Python 3.8

.github/workflows/doc.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        python-version: [ '3.8' ]
+        python-version: [ '3.10' ]
 
     steps:
     - uses: actions/checkout@v3

.github/workflows/publish.yml

@@ -29,10 +29,10 @@ jobs:
       with:
         fetch-depth: 2
 
-    - name: Set up Python 3.8
+    - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: '3.8'
+        python-version: '3.10'
 
     - name: Install build dependencies
       run: |

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest, macos-latest ]
-        python-version: [ '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.9', '3.10', '3.11' ]
 
     steps:
     - uses: actions/checkout@v3

opensmile/core/define.py

@@ -1,5 +1,6 @@
+from __future__ import annotations
+
 import enum
-import typing
 
 import audobject
 
@@ -49,12 +50,12 @@ class FeatureSet(enum.Enum):
 class FeatureSetResolver(audobject.resolver.Base):
     r"""Custom value resolver for :class:`opensmile.FeatureSet`."""
 
-    def decode(self, value: str) -> typing.Union[str, FeatureSet]:
+    def decode(self, value: str) -> str | FeatureSet:
         if value in FeatureSet.__members__:
             value = FeatureSet[value]
         return value
 
-    def encode(self, value: typing.Union[str, FeatureSet]) -> str:
+    def encode(self, value: str | FeatureSet) -> str:
         if isinstance(value, FeatureSet):
             value = str(value).split(".")[-1]
         return value
@@ -84,12 +85,12 @@ class FeatureLevel(enum.Enum):
 class FeatureLevelResolver(audobject.resolver.Base):
     r"""Custom value resolver for :class:`opensmile.FeatureLevel`."""
 
-    def decode(self, value: str) -> typing.Union[str, FeatureLevel]:
+    def decode(self, value: str) -> str | FeatureLevel:
         if value in FeatureLevel.__members__:
             value = FeatureLevel[value]
         return value
 
-    def encode(self, value: typing.Union[str, FeatureLevel]) -> str:
+    def encode(self, value: str | FeatureLevel) -> str:
         if isinstance(value, FeatureLevel):
             value = str(value).split(".")[-1]
         return value

opensmile/core/lib.py

@@ -1,3 +1,4 @@
+from collections.abc import Callable
 from ctypes import CFUNCTYPE
 from ctypes import POINTER
 from ctypes import Structure
@@ -14,11 +15,6 @@
 import json
 import os
 import platform
-from typing import Any
-from typing import Callable
-from typing import Dict
-from typing import List
-from typing import Optional
 
 import numpy as np
 
@@ -290,7 +286,7 @@ def c_char_p_arr(x):
 class OpenSmileException(Exception):  # pragma: no cover
     """Exception thrown for internal openSMILE errors."""
 
-    def __init__(self, code: int, message: Optional[str] = None):
+    def __init__(self, code: int, message: str = None):
         self.code = code
         self.message = message
 
@@ -310,7 +306,7 @@ def __init__(self):
     def initialize(
         self,
         config_file: str,
-        options: Dict[str, Any] = None,
+        options: dict[str, object] = None,
         loglevel: int = 2,
         debug: bool = False,
         console_output: bool = False,
@@ -517,7 +513,7 @@ def internal_callback(message: POINTER(ComponentMessage), param):
         )
 
     def external_message_interface_set_json_callback(
-        self, component_name: str, callback: Callable[[Dict], None]
+        self, component_name: str, callback: Callable[[dict], None]
     ):
         """Sets callback for cExternalMessageInterface.
 
@@ -586,10 +582,10 @@ def _check_smile_result(self, result: int):
     @staticmethod
     def process(
         config_file: str,
-        options: Dict[str, Any],
-        inputs: Dict[str, np.ndarray],
-        outputs: List[str],
-    ) -> Dict[str, np.ndarray]:
+        options: dict[str, object],
+        inputs: dict[str, np.ndarray],
+        outputs: list[str],
+    ) -> dict[str, np.ndarray]:
         """Runs config on a set of input buffers.
 
         Returns the specified set of output buffers.

opensmile/core/smile.py

@@ -1,6 +1,9 @@
+from __future__ import annotations
+
+from collections.abc import Callable
+from collections.abc import Sequence
 import errno
 import os
-import typing
 import warnings
 
 import numpy as np
@@ -133,19 +136,19 @@ class Smile(audinterface.Feature, audobject.Object):
     )
     def __init__(
         self,
-        feature_set: typing.Union[str, FeatureSet] = FeatureSet.ComParE_2016,
-        feature_level: typing.Union[str, FeatureLevel] = FeatureLevel.Functionals,
+        feature_set: str | FeatureSet = FeatureSet.ComParE_2016,
+        feature_level: str | FeatureLevel = FeatureLevel.Functionals,
         *,
         options: dict = None,
         loglevel: int = 2,
         logfile: str = None,
         sampling_rate: int = None,
-        channels: typing.Union[int, typing.Sequence[int]] = 0,
+        channels: int | Sequence[int] = 0,
         mixdown: bool = False,
         resample: bool = False,
         segment: audinterface.Segment = None,
         keep_nat: bool = False,
-        num_workers: typing.Optional[int] = 1,
+        num_workers: int | None = 1,
         multiprocessing: bool = False,
         verbose: bool = False,
     ):
@@ -310,7 +313,7 @@ def _extract(
 
         return starts, ends, np.concatenate(ys, axis=1)
 
-    def _feature_names(self) -> typing.List[str]:
+    def _feature_names(self) -> list[str]:
         r"""Read feature names from config file."""
         options = self._options()
         options["source"] = os.path.join(
@@ -418,8 +421,8 @@ def _smile(self, options: dict) -> OpenSMILE:
 
     @staticmethod
     def _sink_callback(
-        y: typing.List[np.ndarray], starts: typing.List[float], ends: typing.List[float]
-    ) -> typing.Callable[[np.ndarray, FrameMetaData], None]:
+        y: list[np.ndarray], starts: list[float], ends: list[float]
+    ) -> Callable[[np.ndarray, FrameMetaData], None]:
         r"""Return callback where features are collected."""
 
         def callback(data: np.ndarray, meta: FrameMetaData):

pyproject.toml

@@ -25,12 +25,12 @@ classifiers = [
     'Operating System :: OS Independent',
     'Programming Language :: Python',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
     'Programming Language :: Python :: 3.11',
     'Topic :: Scientific/Engineering',
 ]
+requires-python = '>=3.9'
 dependencies = [
     'audobject >=0.6.1',
     'audinterface >=0.7.0',