为 python3 安装 venv

Question

我正在尝试在 Ubuntu 15.10 上使用 python3 创建 venv。 我已经安装了 python 3.4.4。 首先，我尝试通过 pip3 安装 venv（我已经通过 python2.7 安装了它，但据我了解，对于 py3 我应该重新安装它）

pip3 install virtualenv

我得到了The 'pip==8.0.0' distribution was not found and is required by the application 错误。

接下来我尝试使用以下命令安装 pip3：

> sudo apt-get install python3-pip

并且看起来它已成功完成。但是当我跑步时

> pip3

我收到以下错误：

Traceback (most recent call last):
  File "/usr/local/bin/pip3", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3130, in <module>
    @_call_aside
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3116, in _call_aside
    f(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3143, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 644, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 657, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 830, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==8.0.0' distribution was not found and is required by the application

如果我跑步

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

我做错了吗？ pip3 是否只需要 pip==8.0？

Answer 1

你的 pip 指向 python 2.7

  usr/local/lib/python2.7/

先改变路径

  export PATH=/path/to/python3:/path/to/python3/scripts-folder:/path/to/python3-pip:$PATH

检查路径

  echo $PATH

然后运行 ​​pip 或 pip3