old_contents: # Copyright 2013-2020 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 PyFuture(PythonPackage):
      """Clean single-source support for Python 3 and 2"""
  
      homepage = "https://python-future.org/"
      url = "https://pypi.io/packages/source/f/future/future-0.16.0.tar.gz"
  
      version('0.17.1', sha256='67045236dcfd6816dc439556d009594abf643e5eb48992e36beac09c2ca659b8')
      version('0.17.0', sha256='eb6d4df04f1fb538c99f69c9a28b255d1ee4e825d479b9c62fc38c0cf38065a4')
      version('0.16.0', sha256='e39ced1ab767b5936646cedba8bcce582398233d6a627067d4c6a454c90cfedb')
      version('0.15.2', sha256='3d3b193f20ca62ba7d8782589922878820d0a023b885882deec830adbf639b97')
  
      depends_on('py-setuptools', type='build')
      depends_on('py-importlib', type=('build', 'run'), when='^python@:2.6')
      depends_on('py-argparse', type=('build', 'run'), when='^python@:2.6')
  
new_contents: # Copyright 2013-2020 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 PyFuture(PythonPackage):
      """Clean single-source support for Python 3 and 2"""
  
      homepage = "https://python-future.org/"
      url = "https://pypi.io/packages/source/f/future/future-0.18.2.tar.gz"
  
      version('0.18.2', sha256='b1bead90b70cf6ec3f0710ae53a525360fa360d306a86583adc6bf83a4db537d')
      version('0.17.1', sha256='67045236dcfd6816dc439556d009594abf643e5eb48992e36beac09c2ca659b8')
      version('0.17.0', sha256='eb6d4df04f1fb538c99f69c9a28b255d1ee4e825d479b9c62fc38c0cf38065a4')
      version('0.16.0', sha256='e39ced1ab767b5936646cedba8bcce582398233d6a627067d4c6a454c90cfedb')
      version('0.15.2', sha256='3d3b193f20ca62ba7d8782589922878820d0a023b885882deec830adbf639b97')
  
      depends_on('py-setuptools', type='build')
      depends_on('py-importlib', type=('build', 'run'), when='^python@:2.6')
      depends_on('py-argparse', type=('build', 'run'), when='^python@:2.6')
  
subject: Add py-future (#19195)