Can not install psutil===5.4.5 when setuptools==39.2.0

[Lv Jiawei]

When setuptools==39.2.0, It can not install psutil===5.4.5 by pip install. It will raise an import error as below:
Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-87PyS7/psutil/setup.py", line 351, in <module>
        main()
      File "/tmp/pip-build-87PyS7/psutil/setup.py", line 347, in main
        setup(**kwargs)
      File "/usr/lib64/python2.7/distutils/core.py", line 112, in setup
        _setup_distribution = dist = klass(attrs)
      File "/usr/lib/python2.7/site-packages/setuptools/dist.py", line 269, in __init__
        _Distribution.__init__(self,attrs)
      File "/usr/lib64/python2.7/distutils/dist.py", line 287, in __init__
        self.finalize_options()
      File "/usr/lib/python2.7/site-packages/setuptools/dist.py", line 302, in finalize_options
        ep.load()(self, ep.name, value)
      File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2318, in load
        return self.resolve()
      File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2328, in resolve
        raise ImportError(str(exc))
    ImportError: 'module' object has no attribute 'check_specifier'

I downgrade setuptools less than 39.2.0. The psutil can be installed.

[Matthew Thode (prometheanfire)]

I don't think we were able to reproduce this. Should we close this?

[Lv Jiawei (zhangoic)]

Please close.