安装 ROS 时没有名为 'pip._vendor.cachecontrol' 的模块答案

【问题标题】：When installing ROS No module named 'pip._vendor.cachecontrol'安装 ROS 时没有名为 'pip._vendor.cachecontrol' 的模块
【发布时间】：2015-10-24 09:55:24
【问题描述】：

我正在按照在 OSX 上安装 ROS 的说明进行操作。当我输入命令pip --version 时，出现以下错误。这是the manual 我正在关注。

Traceback (most recent call last):
  File "/usr/local/bin/pip", line 9, in <module>
    load_entry_point('pip==6.1.1', 'console_scripts', 'pip')()
  File "build/bdist.macosx-10.9-x86_64/egg/pkg_resources/__init__.py", line 552, in load_entry_point
  File "build/bdist.macosx-10.9-x86_64/egg/pkg_resources/__init__.py", line 2672, in load_entry_point
  File "build/bdist.macosx-10.9-x86_64/egg/pkg_resources/__init__.py", line 2345, in load
  File "build/bdist.macosx-10.9-x86_64/egg/pkg_resources/__init__.py", line 2351, in resolve
  File "/usr/local/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/__init__.py", line 15, in <module>
    from pip.vcs import git, mercurial, subversion, bazaar  # noqa
  File "/usr/local/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/vcs/mercurial.py", line 10, in <module>
    from pip.download import path_to_url
  File "/usr/local/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/download.py", line 38, in <module>
    from pip._vendor.cachecontrol import CacheControlAdapter
  File "/usr/local/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/_vendor/__init__.py", line 92, in load_module
    raise ImportError("No module named '%s'" % (name,))
ImportError: No module named 'pip._vendor.cachecontrol'

你知道我该如何解决这个问题吗？

【问题讨论】：

标签： macos installation pip homebrew ros

【解决方案1】：

我必须执行以下操作才能使其正常工作：

brew install openssl
brew unlink python
brew install python
sudo easy_install pip

【讨论】：