无法升级和破坏pip无法安装pywinrm

Question

当尝试通过pip安装模块时，它说我需要安装setuptools 18.5或更高版本。所以我做了一个“pip install -U pip”它将我的pip版本升级到10.0.1。然后，当我尝试安装pywinrm模块时，它会因语法错误而中断。 事实上，它在升级到10.0.1时会破坏所有Pip命令。我目前安装了7.1.0和Python 2.6.6

我试试这个：

pip install pywinrm

    Traceback (most recent call last):
 File "/usr/bin/pip", line 7, in <module>
   from pip._internal import main
 File "/usr/lib/python2.6/site-packages/pip/_internal/__init__.py", line 42, in <module>
   from pip._internal import cmdoptions
 File "/usr/lib/python2.6/site-packages/pip/_internal/cmdoptions.py", line 16, in <module>
   from pip._internal.index import (
 File "/usr/lib/python2.6/site-packages/pip/_internal/index.py", line 526
   {str(c.version) for c in all_candidates},
                     ^â
SyntaxError: invalid syntax