Update syntax to Python 3.9

audb/core/api.py

@@ -1,6 +1,8 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
 import os
 import tempfile
-import typing
 
 import pandas as pd
 
@@ -286,7 +288,7 @@ def exists(
     *,
     version: str = None,
     bit_depth: int = None,
-    channels: typing.Union[int, typing.Sequence[int]] = None,
+    channels: int | Sequence[int] = None,
     format: str = None,
     mixdown: bool = False,
     sampling_rate: int = None,
@@ -367,7 +369,7 @@ def flavor_path(
     version: str,
     *,
     bit_depth: int = None,
-    channels: typing.Union[int, typing.Sequence[int]] = None,
+    channels: int | Sequence[int] = None,
     format: str = None,
     mixdown: bool = False,
     sampling_rate: int = None,
@@ -453,7 +455,7 @@ def latest_version(
 
 def remove_media(
     name: str,
-    files: typing.Union[str, typing.Sequence[str]],
+    files: str | Sequence[str],
     *,
     verbose: bool = False,
 ):
@@ -560,7 +562,7 @@ def repository(
 
 def versions(
     name: str,
-) -> typing.List[str]:
+) -> list[str]:
     r"""Available versions of database.
 
     Args:

audb/core/config.py

@@ -27,7 +27,7 @@ def load_configuration_file(config_file: str):
 
     """
     if os.path.exists(config_file):
-        with open(config_file, "r") as cf:
+        with open(config_file) as cf:
             config = yaml.load(cf, Loader=yaml.BaseLoader)
     else:
         config = {}

audb/core/dependencies.py

@@ -1,8 +1,11 @@
+from __future__ import annotations
+
+from collections.abc import Callable
+from collections.abc import Sequence
 import errno
 import os
 import re
 import tempfile
-import typing
 
 import pandas as pd
 import pyarrow as pa
@@ -110,7 +113,7 @@ def __eq__(self, other: "Dependencies") -> bool:
         """
         return self._df.equals(other._df)
 
-    def __getitem__(self, file: str) -> typing.List:
+    def __getitem__(self, file: str) -> list:
         r"""File information.
 
         Args:
@@ -130,7 +133,7 @@ def __str__(self) -> str:  # noqa: D105
         return str(self._df)
 
     @property
-    def archives(self) -> typing.List[str]:
+    def archives(self) -> list[str]:
         r"""All media, table, attachment archives.
 
         Return:
@@ -140,7 +143,7 @@ def archives(self) -> typing.List[str]:
         return sorted(self._df.archive.unique().tolist())
 
     @property
-    def attachments(self) -> typing.List[str]:
+    def attachments(self) -> list[str]:
         r"""Attachment paths (can be a file or a folder).
 
         Returns:
@@ -152,7 +155,7 @@ def attachments(self) -> typing.List[str]:
         ].index.tolist()
 
     @property
-    def attachment_ids(self) -> typing.List[str]:
+    def attachment_ids(self) -> list[str]:
         r"""Attachment IDs.
 
         Returns:
@@ -164,7 +167,7 @@ def attachment_ids(self) -> typing.List[str]:
         ].archive.tolist()
 
     @property
-    def files(self) -> typing.List[str]:
+    def files(self) -> list[str]:
         r"""All media, table, attachments.
 
         Returns:
@@ -174,7 +177,7 @@ def files(self) -> typing.List[str]:
         return self._df.index.tolist()
 
     @property
-    def media(self) -> typing.List[str]:
+    def media(self) -> list[str]:
         r"""Media files.
 
         Returns:
@@ -186,7 +189,7 @@ def media(self) -> typing.List[str]:
         ].index.tolist()
 
     @property
-    def removed_media(self) -> typing.List[str]:
+    def removed_media(self) -> list[str]:
         r"""Removed media files.
 
         Returns:
@@ -199,7 +202,7 @@ def removed_media(self) -> typing.List[str]:
         ].index.tolist()
 
     @property
-    def table_ids(self) -> typing.List[str]:
+    def table_ids(self) -> list[str]:
         r"""Table IDs.
 
         Like :meth:`audb.Dependencies.tables`,
@@ -213,7 +216,7 @@ def table_ids(self) -> typing.List[str]:
         return [os.path.splitext(table[3:])[0] for table in self.tables]
 
     @property
-    def tables(self) -> typing.List[str]:
+    def tables(self) -> list[str]:
         r"""Tables files.
 
         Returns:
@@ -455,8 +458,8 @@ def _add_attachment(
 
     def _add_media(
         self,
-        values: typing.Sequence[
-            typing.Tuple[
+        values: Sequence[
+            tuple[
                 str,  # file
                 str,  # archive
                 int,  # bit_depth
@@ -522,8 +525,8 @@ def _column_loc(
         self,
         column: str,
         file: str,
-        dtype: typing.Callable = None,
-    ) -> typing.Any:
+        dtype: Callable = None,
+    ) -> object:
         r"""Column content for selected file.
 
         Args:
@@ -569,7 +572,7 @@ def _dataframe_to_table(
             table = table.rename_columns(columns)
         return table
 
-    def _drop(self, files: typing.Sequence[str]):
+    def _drop(self, files: Sequence[str]):
         r"""Drop files from table.
 
         Args:
@@ -638,8 +641,8 @@ def _table_to_dataframe(self, table: pa.Table) -> pd.DataFrame:
 
     def _update_media(
         self,
-        values: typing.Sequence[
-            typing.Tuple[
+        values: Sequence[
+            tuple[
                 str,  # file
                 str,  # archive
                 int,  # bit_depth
@@ -670,7 +673,7 @@ def _update_media(
 
     def _update_media_version(
         self,
-        files: typing.Sequence[str],
+        files: Sequence[str],
         version: str,
     ):
         r"""Update version of media files.
@@ -685,7 +688,7 @@ def _update_media_version(
 
 def error_message_missing_object(
     object_type: str,
-    missing_object_id: typing.Union[str, typing.Sequence],
+    missing_object_id: str | Sequence,
     database_name: str = None,
     database_version: str = None,
 ) -> str:
@@ -720,12 +723,12 @@ def error_message_missing_object(
 
 
 def filter_deps(
-    requested_deps: typing.Optional[typing.Union[str, typing.Sequence[str]]],
-    available_deps: typing.Sequence[str],
+    requested_deps: str | Sequence[str] | None,
+    available_deps: Sequence[str],
     deps_type: str,
     database_name: str = None,
     database_version: str = None,
-) -> typing.Sequence[str]:
+) -> Sequence[str]:
     r"""Filter dependency files by requested files.
 
     Args:
@@ -778,7 +781,7 @@ def filter_deps(
 
 
 def download_dependencies(
-    backend_interface: typing.Type[audbackend.interface.Base],
+    backend_interface: type[audbackend.interface.Base],
     name: str,
     version: str,
     verbose: bool,
@@ -833,7 +836,7 @@ def download_dependencies(
 
 
 def upload_dependencies(
-    backend_interface: typing.Type[audbackend.interface.Base],
+    backend_interface: type[audbackend.interface.Base],
     deps: Dependencies,
     db_root: str,
     name: str,

audb/core/flavor.py

@@ -1,6 +1,8 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
 import os
 import shutil
-import typing
 
 import numpy as np
 
@@ -53,7 +55,7 @@ def __init__(
         self,
         *,
         bit_depth: int = None,
-        channels: typing.Union[int, typing.Sequence[int]] = None,
+        channels: int | Sequence[int] = None,
         format: str = None,
         mixdown: bool = False,
         sampling_rate: int = None,
@@ -150,9 +152,9 @@ def short_id(
     def _check_convert(
         self,
         file: str,
-        bit_depth: typing.Optional[int],
-        channels: typing.Optional[int],
-        sampling_rate: typing.Optional[int],
+        bit_depth: int | None,
+        channels: int | None,
+        sampling_rate: int | None,
     ) -> bool:
         r"""Check if file needs to be converted to flavor."""
         format = audeer.file_extension(file).lower()