东西不会安装在 AWS EC2 上，因为我有 pip 8.1.2 而不是 6.1.1答案

【问题标题】：things won't install on AWS EC2 because I have pip 8.1.2 instead of 6.1.1东西不会安装在 AWS EC2 上，因为我有 pip 8.1.2 而不是 6.1.1
【发布时间】：2016-11-04 11:22:10
【问题描述】：

我在当前的项目中多次遇到这种情况，这让我发疯。我发现我需要安装一些模块，但收到一个错误，指出未安装 pip 6.1.1（服务器有 8.1.2）：

$ sudo pip install djangorestframework
Traceback (most recent call last):
  File "/usr/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2991, in <module>
    @_call_aside
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2977, in _call_aside
    f(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3004, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 664, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 677, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 856, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==6.1.1' distribution was not found and is required by the application

所以我检查了：

$ pip --version
pip 8.1.2 from /usr/local/lib/python2.7/site-packages (python 2.7)

我尝试过$ sudo yum install djangorestframework，但该包不存在（不足为奇）。如何安装这些似乎特别依赖于 6.1.1 但我有 8.1.2 的东西？我担心如果我卸载（和回滚）我会失去其他领域的功能......

我突然想到这是第一个命令中的 sudo 和第二个命令中的 sudo 之间的区别，所以我尝试了这个：

$ sudo yum install python-pip
Loaded plugins: priorities, update-motd, upgrade-helper
Package python26-pip-6.1.1-1.23.amzn1.noarch already installed and latest version
Nothing to do
[ec2-user@ip-172-XX-XX-XXX limboproj]$ source limboenv/bin/activate
(limboenv)[ec2-user@ip-172-XX-XX-XXX limboproj]$ sudo yum install python-pip
Loaded plugins: priorities, update-motd, upgrade-helper
amzn-main/latest                                              | 2.1 kB     00:00
amzn-updates/latest                                           | 2.3 kB     00:00
Package python26-pip-6.1.1-1.23.amzn1.noarch already installed and latest version
Nothing to do

我仍然得到：

$ sudo pip --version
Traceback (most recent call last):
  File "/usr/bin/pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2991, in <module>
    @_call_aside
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2977, in _call_aside
    f(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3004, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 664, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 677, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 856, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==6.1.1' distribution was not found and is required by the application

SO 被标记为重复，所以我在下面添加我的评论。当我尝试按照建议问题的答案进行操作时，我得到了：

$ sudo pip install --upgrade pip-6.1.1

导致堆栈跟踪以：

结尾

The 'pip==6.1.1' distribution was not found and is required by the application. also notice in my edit, i show that sudo yum install python-pip seems to conflict with sudo pip --version

【问题讨论】：

How can I install a specific version of pip via easy-install? - Mac OS Mavericks的可能重复
好主意，但没有解决。根据这些答案，]$ sudo pip install --upgrade pip-6.1.1 结果为：The 'pip==6.1.1' distribution was not found and is required by the application。在我的编辑中也注意到，我表明 sudo yum install python-pip 似乎与 sudo pip --version 冲突
试试sudo pip install pip==6.1.1
@maxymoo，stacktrace 以The 'pip==6.1.1' distribution was not found and is required by the application结尾
如果您将pip 本地安装到/usr/local/lib，并同时使用系统级pip 包，那么您将遇到这样的糟糕时光。尝试运行 pip -V 并注意有问题的版本信息来自哪里。

标签： python amazon-web-services amazon-ec2 pip

【解决方案1】：

不确定如何真正解决我正在处理的问题，但事实证明该项目的 virtualenv 有一个令人满意的 pip 版本。对于未来的人，尝试激活虚拟环境：

$ source projectenv/bin/activate

然后安装

$ sudo pip install djangorestframework

这对我很有效

【讨论】：