gistfile1.txt

(test) utek@grendel:~$ pip install -U --force --no-cache-dir enum
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Collecting enum
  Downloading https://files.pythonhosted.org/packages/02/a0/32e1d5a21b703f600183e205aafc6773577e16429af5ad3c3f9b956b07ca/enum-0.4.7.tar.gz
Collecting setuptools (from enum)
  Downloading https://files.pythonhosted.org/packages/37/06/754589caf971b0d2d48f151c2586f62902d93dc908e2fd9b9b9f6aa3c9dd/setuptools-40.6.3-py2.py3-none-any.whl (573kB)
    100% |████████████████████████████████| 573kB 27.8MB/s
Exception:
Traceback (most recent call last):
  File "/home/utek/test/local/lib/python2.7/site-packages/pip/_internal/cli/base_command.py", line 176, in main
    status = self.run(options, args)
  File "/home/utek/test/local/lib/python2.7/site-packages/pip/_internal/commands/install.py", line 346, in run
    session=session, autobuilding=True
  File "/home/utek/test/local/lib/python2.7/site-packages/pip/_internal/wheel.py", line 848, in build
    assert building_is_possible
AssertionError
(test) utek@grendel:~$ pip install -U pip==18.1
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Collecting pip==18.1
  Downloading https://files.pythonhosted.org/packages/c2/d7/90f34cb0d83a6c5631cf71dfe64cc1054598c843a92b400e55675cc2ac37/pip-18.1-py2.py3-none-any.whl (1.3MB)
    100% |████████████████████████████████| 1.3MB 1.9MB/s
Installing collected packages: pip
  Found existing installation: pip 19.0
    Uninstalling pip-19.0:
      Successfully uninstalled pip-19.0
Successfully installed pip-18.1
(test) utek@grendel:~$ pip install -U --force --no-cache-dir enum
Collecting enum
  Downloading https://files.pythonhosted.org/packages/02/a0/32e1d5a21b703f600183e205aafc6773577e16429af5ad3c3f9b956b07ca/enum-0.4.7.tar.gz
Collecting setuptools (from enum)
  Downloading https://files.pythonhosted.org/packages/37/06/754589caf971b0d2d48f151c2586f62902d93dc908e2fd9b9b9f6aa3c9dd/setuptools-40.6.3-py2.py3-none-any.whl (573kB)
    100% |████████████████████████████████| 573kB 2.9MB/s
Installing collected packages: setuptools, enum
  Found existing installation: setuptools 40.6.3
    Uninstalling setuptools-40.6.3:
      Successfully uninstalled setuptools-40.6.3
  Running setup.py install for enum ... done
Successfully installed enum-0.4.7 setuptools-40.6.3
You are using pip version 18.1, however version 19.0 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.