Drop Python 3.9 support (#1443)

Contributes to rapidsai/build-planning#88

Finishes the work of dropping Python 3.9 support.

This project stopped building / testing against Python 3.9 as of rapidsai/shared-workflows#235.
This PR updates configuration and docs to reflect that.

## Notes for Reviewers

### How I tested this

Checked that there were no remaining uses like this:

```shell
git grep -E '3\.9'
git grep '39'
git grep 'py39'
```

And similar for variations on Python 3.8 (to catch things that were missed the last time this was done).

Authors:
  - James Lamb (https://github.com/jameslamb)

Approvers:
  - Mark Harris (https://github.com/harrism)
  - https://github.com/jakirkham

URL: #1443

README.md

@@ -119,7 +119,7 @@ docker run --gpus all --pull always --rm -it \
 ### Install with Conda
 
 To install via conda:
-> **Note** cuSpatial is supported only on Linux or [through WSL](https://rapids.ai/wsl2.html), and with Python versions 3.9, 3.10, and 3.11.
+> **Note** cuSpatial is supported only on Linux or [through WSL](https://rapids.ai/wsl2.html), and with Python versions 3.10 and 3.11.
 
 cuSpatial can be installed with conda (miniconda, or the full Anaconda distribution) from the rapidsai channel:
 
@@ -134,7 +134,7 @@ See the [RAPIDS installation documentation](https://docs.rapids.ai/install) for
 ### Install with pip
 
 To install via pip:
-> **Note** cuSpatial is supported only on Linux or [through WSL](https://rapids.ai/wsl2.html), and with Python versions 3.9, 3.10, and 3.11.
+> **Note** cuSpatial is supported only on Linux or [through WSL](https://rapids.ai/wsl2.html), and with Python versions 3.10 and 3.11.
 
 The cuSpatial pip packages can be installed from NVIDIA's PyPI index. pip installations require using the matching wheel to the system's installed CUDA toolkit.
 - For CUDA 11 toolkits, install the `-cu11` wheels

conda/environments/all_cuda-118_arch-x86_64.yaml

@@ -43,7 +43,7 @@ dependencies:
 - pytest
 - pytest-cov
 - pytest-xdist
-- python>=3.9,<3.12
+- python>=3.10,<3.12
 - rapids-build-backend>=0.3.0,<0.4.0.dev0
 - rmm==24.10.*,>=0.0.0a0
 - scikit-build-core>=0.10.0

conda/environments/all_cuda-125_arch-x86_64.yaml

@@ -45,7 +45,7 @@ dependencies:
 - pytest
 - pytest-cov
 - pytest-xdist
-- python>=3.9,<3.12
+- python>=3.10,<3.12
 - rapids-build-backend>=0.3.0,<0.4.0.dev0
 - rmm==24.10.*,>=0.0.0a0
 - scikit-build-core>=0.10.0

dependencies.yaml

@@ -353,10 +353,6 @@ dependencies:
     specific:
       - output_types: conda
         matrices:
-          - matrix:
-              py: "3.9"
-            packages:
-              - python=3.9
           - matrix:
               py: "3.10"
             packages:
@@ -367,7 +363,7 @@ dependencies:
               - python=3.11
           - matrix:
             packages:
-              - python>=3.9,<3.12
+              - python>=3.10,<3.12
   run_python_cuspatial:
     common:
       - output_types: [conda, requirements, pyproject]

pyproject.toml

@@ -1,6 +1,8 @@
+# Copyright (c) 2019-2024, NVIDIA CORPORATION.
+
 [tool.black]
 line-length = 79
-target-version = ["py39"]
+target-version = ["py310"]
 include = '\.py?$'
 force-exclude = '''
 /(

python/cuproj/pyproject.toml

@@ -26,7 +26,7 @@ description = "cuProj: GPU-Accelerated Coordinate Projection"
 readme = { file = "README.md", content-type = "text/markdown" }
 authors = [{ name = "NVIDIA Corporation" }]
 license = { text = "Apache 2.0" }
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "cupy-cuda11x>=12.0.0",
     "rmm==24.10.*,>=0.0.0a0",
@@ -37,7 +37,6 @@ classifiers = [
     "Topic :: Scientific/Engineering",
     "License :: OSI Approved :: Apache Software License",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
 ]

python/cuspatial/pyproject.toml

@@ -28,7 +28,7 @@ authors = [
     { name = "NVIDIA Corporation" },
 ]
 license = { text = "Apache 2.0" }
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "cudf==24.10.*,>=0.0.0a0",
     "geopandas>=0.11.0",
@@ -41,7 +41,6 @@ classifiers = [
     "Topic :: Scientific/Engineering",
     "License :: OSI Approved :: Apache Software License",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
 ]