Move the most of metadata into PEP 621-compliant pyproject.toml.

pyproject.toml

@@ -1,3 +1,87 @@
 [build-system]
-requires = ["setuptools>=42.2", "numpy>=1.7",]
+requires = ["setuptools>=61.2", "numpy>=1.7",]
 build-backend = "setuptools.build_meta"
+
+[project]
+name = "GPy"
+authors = [{name = "GPy Authors: https://github.com/SheffieldML/GPy/graphs/contributors", email = "gpy.authors@gmail.com"},]
+license = {text = "BSD-3-Clause"}
+description = "The Gaussian Process Toolbox"
+readme = "README.rst"
+keywords = ["machine-learning", "gaussian-processes", "kernels",]
+classifiers = [
+    "License :: OSI Approved :: BSD License",
+    "Natural Language :: English",
+    "Operating System :: MacOS :: MacOS X",
+    "Operating System :: Microsoft :: Windows",
+    "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python :: 3.5",
+    "Programming Language :: Python :: 3.6",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Framework :: IPython",
+    "Intended Audience :: Science/Research",
+    "Intended Audience :: Developers",
+    "Topic :: Software Development",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+]
+dependencies = [
+    "numpy>=1.7",
+    "six",
+    "paramz>=0.9.0",
+    "cython>=0.29",
+    "scipy>=1.3.0; python_version >= '3.6'",
+    "scipy>=1.3.0,<1.5.0; python_version < '3.6'",
+]
+dynamic = ["version",]
+
+[project.urls]
+Homepage = "https://sheffieldml.github.io/GPy/"
+Download = "https://github.com/SheffieldML/GPy/archive/refs/heads/devel.zip"
+"Source Code" = "https://github.com/SheffieldML/GPy"
+"Bug Tracker" = "https://github.com/SheffieldML/GPy/issues"
+
+[project.optional-dependencies]
+docs = ["sphinx"]
+optional = ["mpi4py", "ipython>=4.0.0"]
+plotting = [
+    "matplotlib==3.3.4; python_version >= '3.6'",
+    "matplotlib==3.0.0; python_version < '3.6'",
+    "plotly >= 1.8.6",
+]
+notebook = [
+    "jupyter_client >= 4.0.6",
+    "ipywidgets >= 4.0.3",
+    "ipykernel >= 4.1.0",
+    "notebook >= 4.0.5",
+]
+
+[tool.setuptools]
+package-dir = {GPy = "GPy"}
+py-modules = ["GPy.__init__"]
+packages = [
+    "GPy",
+    "GPy.core",
+    "GPy.core.parameterization",
+    "GPy.kern",
+    "GPy.kern.src",
+    "GPy.kern.src.psi_comp",
+    "GPy.models",
+    "GPy.inference",
+    "GPy.inference.optimization",
+    "GPy.inference.mcmc",
+    "GPy.inference.latent_function_inference",
+    "GPy.likelihoods",
+    "GPy.mappings",
+    "GPy.examples",
+    "GPy.testing",
+    "GPy.util",
+    "GPy.plotting",
+    "GPy.plotting.gpy_plot",
+    "GPy.plotting.matplot_dep",
+    "GPy.plotting.matplot_dep.controllers",
+    "GPy.plotting.plotly_dep",
+]
+include-package-data = true
+#test-suite = "GPy.testing"

setup.cfg

@@ -1,70 +1,4 @@
-[metadata]
-name = GPy
-author_email = gpy.authors@gmail.com
-license = BSD-3-Clause
-description = The Gaussian Process Toolbox
-keywords =
-    machine-learning
-    gaussian-processes
-    kernels
-url = https://sheffieldml.github.io/GPy/
-download_url = https://github.com/SheffieldML/GPy/archive/refs/heads/devel.zip
-long_description = file: README.rst
-classifiers =
-    License :: OSI Approved :: BSD License
-    Natural Language :: English
-    Operating System :: MacOS :: MacOS X
-    Operating System :: Microsoft :: Windows
-    Operating System :: POSIX :: Linux
-    Programming Language :: Python :: 3.5
-    Programming Language :: Python :: 3.6
-    Programming Language :: Python :: 3.7
-    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
-    Framework :: IPython
-    Intended Audience :: Science/Research
-    Intended Audience :: Developers
-    Topic :: Software Development
-    Topic :: Software Development :: Libraries :: Python Modules
-project_urls =
-    Source Code = https://github.com/SheffieldML/GPy
-    Bug Tracker = https://github.com/SheffieldML/GPy/issues
-
 [options]
-package_dir =
-    GPy = GPy
-py_modules = GPy.__init__
-packages =
-    GPy
-    GPy.core
-    GPy.core.parameterization
-    GPy.kern
-    GPy.kern.src
-    GPy.kern.src.psi_comp
-    GPy.models
-    GPy.inference
-    GPy.inference.optimization
-    GPy.inference.mcmc
-    GPy.inference.latent_function_inference
-    GPy.likelihoods
-    GPy.mappings
-    GPy.examples
-    GPy.testing
-    GPy.util
-    GPy.plotting
-    GPy.plotting.gpy_plot
-    GPy.plotting.matplot_dep
-    GPy.plotting.matplot_dep.controllers
-    GPy.plotting.plotly_dep
-setup_requires = numpy>=1.7
-install_requires =
-    numpy>=1.7
-    six
-    paramz>=0.9.0
-    cython>=0.29
-    scipy>=1.3.0; python_version >= '3.6'
-    scipy>=1.3.0,<1.5.0; python_version < '3.6'
-include_package_data = True
 test_suite = GPy.testing
 
 [options.extras_require]