old_contents: # pylint: disable=invalid-name, exec-used
  """Setup xgboost package."""
  from __future__ import absolute_import
  import sys
  import os
  from setuptools import setup, find_packages
  #import subprocess
  sys.path.insert(0, '.')
  
  #build on the fly if install in pip
  #otherwise, use build.sh in the parent directory
  
  #ugly solution since pip version transition and the old pip detection method not
  #working. Manually turn on when packing up for pip installation
  if False:
      if not os.name == 'nt': #if not windows
          os.system('sh ./xgboost/build-python.sh')
      else:
          print 'Windows users please use github installation.'
          sys.exit()
  
  
  CURRENT_DIR = os.path.dirname(__file__)
  
  # We can not import `xgboost.libpath` in setup.py directly since xgboost/__init__.py
  # import `xgboost.core` and finally will import `numpy` and `scipy` which are setup
  # `install_requires`. That's why we're using `exec` here.
  libpath_py = os.path.join(CURRENT_DIR, 'xgboost/libpath.py')
  libpath = {'__file__': libpath_py}
  exec(compile(open(libpath_py, "rb").read(), libpath_py, 'exec'), libpath, libpath)
  
  LIB_PATH = libpath['find_lib_path']()
  
  #to deploy to pip, please use
  #make pythonpack
  #python setup.py register sdist upload
  #and be sure to test it firstly using "python setup.py register sdist upload -r pypitest"
  setup(name='xgboost',
        version=open(os.path.join(CURRENT_DIR, 'xgboost/VERSION')).read().strip(),
        #version='0.4a23',
        description=open(os.path.join(CURRENT_DIR, 'README.md')).read(),
        install_requires=[
            'numpy',
            'scipy',
        ],
        maintainer='Hongliang Liu',
        maintainer_email='phunter.lau@gmail.com',
        zip_safe=False,
        packages=find_packages(),
        #don't need this and don't use this, give everything to MANIFEST.in
        #package_dir = {'':'xgboost'},
        #package_data = {'': ['*.txt','*.md','*.sh'],
        #               }
        #this will use MANIFEST.in during install where we specify additional files,
        #this is the golden line
        include_package_data=True,
        #!!! don't use data_files, otherwise install_data process will copy it to
        #root directory for some machines, and cause confusions on building
        #data_files=[('xgboost', LIB_PATH)],
        url='https://github.com/dmlc/xgboost')
  
new_contents: # pylint: disable=invalid-name, exec-used
  """Setup xgboost package."""
  from __future__ import absolute_import
  import sys
  import os
  from setuptools import setup, find_packages
  #import subprocess
  sys.path.insert(0, '.')
  
  #build on the fly if install in pip
  #otherwise, use build.sh in the parent directory
  
  #ugly solution since pip version transition and the old pip detection method not
  #working. Manually turn on when packing up for pip installation
  if False:
      if not os.name == 'nt': #if not windows
          os.system('sh ./xgboost/build-python.sh')
      else:
          print('Windows users please use github installation.')
          sys.exit()
  
  
  CURRENT_DIR = os.path.dirname(__file__)
  
  # We can not import `xgboost.libpath` in setup.py directly since xgboost/__init__.py
  # import `xgboost.core` and finally will import `numpy` and `scipy` which are setup
  # `install_requires`. That's why we're using `exec` here.
  libpath_py = os.path.join(CURRENT_DIR, 'xgboost/libpath.py')
  libpath = {'__file__': libpath_py}
  exec(compile(open(libpath_py, "rb").read(), libpath_py, 'exec'), libpath, libpath)
  
  LIB_PATH = libpath['find_lib_path']()
  
  #to deploy to pip, please use
  #make pythonpack
  #python setup.py register sdist upload
  #and be sure to test it firstly using "python setup.py register sdist upload -r pypitest"
  setup(name='xgboost',
        version=open(os.path.join(CURRENT_DIR, 'xgboost/VERSION')).read().strip(),
        #version='0.4a23',
        description=open(os.path.join(CURRENT_DIR, 'README.md')).read(),
        install_requires=[
            'numpy',
            'scipy',
        ],
        maintainer='Hongliang Liu',
        maintainer_email='phunter.lau@gmail.com',
        zip_safe=False,
        packages=find_packages(),
        #don't need this and don't use this, give everything to MANIFEST.in
        #package_dir = {'':'xgboost'},
        #package_data = {'': ['*.txt','*.md','*.sh'],
        #               }
        #this will use MANIFEST.in during install where we specify additional files,
        #this is the golden line
        include_package_data=True,
        #!!! don't use data_files, otherwise install_data process will copy it to
        #root directory for some machines, and cause confusions on building
        #data_files=[('xgboost', LIB_PATH)],
        url='https://github.com/dmlc/xgboost')
  
subject: correct print for python 3