New python package support: py-river (#32718)

var/spack/repos/builtin/packages/py-river/package.py

@@ -0,0 +1,28 @@
+# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class PyRiver(PythonPackage):
+    """River is a Python library for online machine learning. It aims to be the most
+    user-friendly library for doing machine learning on streaming data. River is the
+    result of a merge between creme and scikit-multiflow."""
+
+    homepage = "https://riverml.xyz/0.13.0/"
+    pypi = "river/river-0.13.0.tar.gz"
+
+    version("0.13.0", sha256="9d068b7a9db32302fbd581af81315681dfe61774a5d777fb3d5982d3c3061340")
+
+    # pyproject.toml
+    depends_on("py-cython", type="build")
+    depends_on("py-setuptools", type="build")
+    depends_on("py-setuptools-rust", type="build")
+
+    # setup.py
+    depends_on("python@3.8:", type=("build", "run"))
+    depends_on("py-numpy@1.22:", type=("build", "run"))
+    depends_on("py-scipy@1.5:", type=("build", "run"))
+    depends_on("py-pandas@1.3:", type=("build", "run"))