refactor(python)!: drop Python 3.9

Author: cpcloud

.github/workflows/ibis-backends-cloud.yml

@@ -37,7 +37,7 @@ jobs:
         os:
           - ubuntu-latest
         python-version:
-          - "3.9"
+          - "3.10"
           - "3.13"
         backend:
           - name: snowflake
@@ -54,7 +54,7 @@ jobs:
               - --extra athena
         include:
           - os: ubuntu-latest
-            python-version: "3.9"
+            python-version: "3.10"
             backend:
               name: bigquery
               title: BigQuery

.github/workflows/ibis-backends.yml

@@ -52,7 +52,7 @@ jobs:
           - ubuntu-latest
           - windows-latest
         python-version:
-          - "3.9"
+          - "3.10"
           - "3.13"
     steps:
       - name: checkout
@@ -92,7 +92,7 @@ jobs:
           - ubuntu-latest
           - windows-latest
         python-version:
-          - "3.9"
+          - "3.10"
           - "3.13"
         backend:
           - name: duckdb
@@ -557,7 +557,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - python-version: "3.9"
+          - python-version: "3.10"
             pyspark-minor-version: "3.3"
             tag: local
             deps:

.github/workflows/ibis-main.yml

@@ -47,7 +47,6 @@ jobs:
           - ubuntu-24.04-arm
           - windows-latest
         python-version:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
@@ -108,31 +107,6 @@ jobs:
           flags: core,${{ runner.os }},python-${{ steps.install_python.outputs.python-version }}
           token: ${{ secrets.CODECOV_TOKEN }}
 
-  test_shapely_duckdb_import:
-    name: Test shapely and duckdb import
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v5
-
-      - name: install python
-        uses: actions/setup-python@v6
-        with:
-          python-version: "3.9"
-
-      - name: install uv
-        uses: astral-sh/[email protected]
-
-      - name: install system dependencies
-        run: |
-          set -euo pipefail
-
-          sudo apt-get update -y -qq
-          sudo apt-get install -y -q build-essential libgeos-dev
-
-      - name: check shapely and duckdb imports
-        run: uv run --extra duckdb --extra geospatial python -c 'import shapely.geometry, duckdb'
-
   test_duckdb_sqlite3_import:
     name: Test sqlite3 and duckdb import
     runs-on: ubuntu-latest

ibis/backends/__init__.py

@@ -12,8 +12,9 @@
 import urllib.parse
 import weakref
 from collections import Counter
+from collections.abc import Callable
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Callable, ClassVar, NamedTuple, overload
+from typing import TYPE_CHECKING, Any, ClassVar, NamedTuple, overload
 
 import ibis
 import ibis.common.exceptions as exc
@@ -1662,12 +1663,8 @@ def _get_backend_names(*, exclude: tuple[str] = ()) -> frozenset[str]:
     are visible to every caller of this function.
 
     """
-
-    if sys.version_info < (3, 10):
-        entrypoints = importlib.metadata.entry_points()["ibis.backends"]
-    else:
-        entrypoints = importlib.metadata.entry_points(group="ibis.backends")
-    return frozenset(ep.name for ep in entrypoints).difference(exclude)
+    entry_points = importlib.metadata.entry_points(group="ibis.backends")
+    return frozenset(ep.name for ep in entry_points).difference(exclude)
 
 
 def connect(resource: Path | str, /, **kwargs: Any) -> BaseBackend:

ibis/backends/athena/__init__.py

@@ -7,8 +7,9 @@
 import os
 import re
 import sys
+from collections.abc import Callable
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Callable
+from typing import TYPE_CHECKING, Any
 
 import fsspec
 import pyarrow_hotfix  # noqa: F401

ibis/backends/bigquery/__init__.py

@@ -8,9 +8,10 @@
 import glob
 import os
 import re
+from collections.abc import Callable
 from decimal import Decimal
 from functools import partial
-from typing import IO, TYPE_CHECKING, Any, Callable, Optional
+from typing import IO, TYPE_CHECKING, Any, Optional
 
 import google.api_core.exceptions
 import google.auth.credentials

ibis/backends/databricks/__init__.py

@@ -9,8 +9,9 @@
 import os
 import sys
 import tempfile
+from collections.abc import Callable
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Callable
+from typing import TYPE_CHECKING, Any
 
 import databricks.sql
 import pyarrow as pa

ibis/backends/exasol/__init__.py

@@ -4,7 +4,8 @@
 import datetime
 import re
 import ssl
-from typing import TYPE_CHECKING, Any, Callable
+from collections.abc import Callable
+from typing import TYPE_CHECKING, Any
 from urllib.parse import unquote_plus
 
 import pyexasol

ibis/backends/oracle/__init__.py

@@ -5,9 +5,10 @@
 import contextlib
 import re
 import warnings
+from collections.abc import Callable
 from functools import cached_property
 from operator import itemgetter
-from typing import TYPE_CHECKING, Any, Callable
+from typing import TYPE_CHECKING, Any
 from urllib.parse import unquote_plus
 
 import oracledb

ibis/backends/oracle/tests/test_client.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from datetime import date  # noqa: TC003
+from datetime import date
 
 import oracledb
 import pandas as pd