new_contents: ##############################################################################
  # Copyright (c) 2013-2017, Lawrence Livermore National Security, LLC.
  # Produced at the Lawrence Livermore National Laboratory.
  #
  # This file is part of Spack.
  # Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
  # LLNL-CODE-647188
  #
  # For details, see https://github.com/spack/spack
  # Please also see the NOTICE and LICENSE files for our notice and the LGPL.
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU Lesser General Public License (as
  # published by the Free Software Foundation) version 2.1, February 1999.
  #
  # This program is distributed in the hope that it will be useful, but
  # WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
  # conditions of the GNU Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this program; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  ##############################################################################
  
  from spack import *
  
  
  class PyLibensemble(PythonPackage):
      """Library for managing ensemble-like collections of computations."""
  
      homepage = "https://libensemble.readthedocs.io"
      url      = "https://pypi.io/packages/source/l/libensemble/libensemble-0.1.0.tar.gz"
  
      version('develop', git='https://github.com/Libensemble/libensemble.git', branch='master')
      version('0.1.0', '0c3d45dd139429de1a5273e5bd8e46ec')
  
      depends_on('python@2.7:2.8,3.3:')
      depends_on('py-setuptools', type='build')
      depends_on('mpi')
      depends_on('py-mpi4py@2.0:', type=('build', 'run'))
      depends_on('py-numpy', type=('build', 'run'))
      depends_on('py-scipy', type=('build', 'run'))
      depends_on('py-petsc4py@3.5:', type=('build', 'run'))
      depends_on('nlopt', type=('build', 'run'))
  
subject: Add new package py-libensemble (#6525)