new package: py-backports-tempfile (#12261)

* new package: py-backports-tempfile

* Update var/spack/repos/builtin/packages/py-backports-tempfile/package.py

Co-Authored-By: Adam J. Stewart <ajstewart426@gmail.com>

* remove rc version

* fix single quote

var/spack/repos/builtin/packages/py-backports-tempfile/package.py

@@ -0,0 +1,20 @@
+# 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 PyBackportsTempfile(PythonPackage):
+    """This package provides backports of new features in Python's tempfile
+    module under the backports namespace
+    """
+
+    homepage = "https://github.com/PiDelport/backports.tempfile"
+    url      = "https://pypi.io/packages/source/b/backports.tempfile/backports.tempfile-1.0.tar.gz"
+
+    version('1.0', sha256='1c648c452e8770d759bdc5a5e2431209be70d25484e1be24876cf2168722c762')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-backports-weakref', type=('build', 'run'))