Add py-ligo-segments package (#12820)

var/spack/repos/builtin/packages/py-ligo-segments/package.py

@@ -0,0 +1,18 @@
+# Copyright 2013-2019 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 import *
+
+
+class PyLigoSegments(PythonPackage):
+    """Representations of semi-open intervals."""
+
+    homepage = "https://pypi.org/project/ligo-segments/"
+    url      = "https://pypi.io/packages/source/l/ligo-segments/ligo-segments-1.2.0.tar.gz"
+
+    version('1.2.0', sha256='5edbcb88cae007c4e154a61cb2c9d0a6d6d4016c1ecaf0a59a667a267bd20e7a')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-six', type=('build', 'run'))