Question

我有一台Ubuntu 16.04机器，在/python/安装了多个python 3，并且需要能够随意切换它们。其中一个版本是Python 3.3，并且在Python 3.4.x之前没有预先安装pip，所以我想在这个python安装中安装pip。我不想使用发行版包，因为它需要实际集成到/ python / python33安装中，我无法管理它：

get-pip.py尝试在/usr/bin

卸载pip版本

$ /tmp/get-pip.py --prefix /python/python33
Collecting pip
  Using cached pip-9.0.1-py2.py3-none-any.whl
Installing collected packages: pip
  Found existing installation: pip 8.1.2
    Uninstalling pip-8.1.2:
Exception:
Traceback (most recent call last):
  File "/tmp/tmpdgdWPZ/pip.zip/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/tmp/tmpdgdWPZ/pip.zip/pip/commands/install.py", line 342, in run
    prefix=options.prefix_path,
  File "/tmp/tmpdgdWPZ/pip.zip/pip/req/req_set.py", line 778, in install
    requirement.uninstall(auto_confirm=True)
  File "/tmp/tmpdgdWPZ/pip.zip/pip/req/req_install.py", line 754, in uninstall
    paths_to_remove.remove(auto_confirm)
  File "/tmp/tmpdgdWPZ/pip.zip/pip/req/req_uninstall.py", line 115, in remove
    renames(path, new_path)
  File "/tmp/tmpdgdWPZ/pip.zip/pip/utils/__init__.py", line 267, in renames
    shutil.move(old, new)
  File "/usr/lib/python2.7/shutil.py", line 303, in move
    os.unlink(src)
OSError: [Errno 13] Permission denied: '/usr/bin/pip'
You are using pip version 8.1.2, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

如果我添加--ignore-installed，它不会出错，但仍然在查看/ usr / bin的pip版本（它正在抱怨的旧版8.1.2）：

$ /tmp/get-pip.py --ignore-installed --prefix /python/python33
Collecting pip
  Using cached pip-9.0.1-py2.py3-none-any.whl
Installing collected packages: pip
Successfully installed pip-9.0.1
You are using pip version 8.1.2, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

easy_install也不起作用：

$ export PYTHONPATH="$PYTHONPATH:/python/python33/"; /usr/bin/easy_install --prefix /python/python33 pip
TEST FAILED: /python/python33/lib/python2.7/site-packages does NOT support .pth files
error: bad install directory or PYTHONPATH

You are attempting to install a package to a directory that is not
on PYTHONPATH and which Python does not read ".pth" files from.  The
installation directory you specified (via --install-dir, --prefix, or
the distutils default setting) was:

    /python/python33/lib/python2.7/site-packages

and your PYTHONPATH environment variable currently contains:

    '/pyqt/sip-4.13.1/site-packages:/pyqt/site-packages:/python/python33/'

Here are some of your options for correcting the problem:

* You can choose a different installation directory, i.e., one that is
  on PYTHONPATH or supports .pth files

* You can add the installation directory to the PYTHONPATH environment
  variable.  (It must then also be on PYTHONPATH whenever you run
  Python and want to use the package(s) you are installing.)

* You can set up the installation directory to support ".pth" files by
  using one of the approaches described here:

  https://pythonhosted.org/setuptools/easy_install.html#custom-installation-locations

Please make the appropriate changes for your system and try again.

为什么要尝试安装到/python/python33/lib/python2.7/site-packages？这是pip的python 2版本还是什么？

我已经在SO上阅读了很多相关的答案，但到目前为止他们都没有帮助。

Answer 1

我在16.04 Ubuntu Box上安装了Python 3.5.2和3.6.3。

3.5.2是/ usr / bin的系统安装版本 python3和python3.5的符号链接指向此版本

3.6.3安装在/ usr / local / bin python3.6指向此版本

对我来说，以下工作：

wget https://bootstrap.pypa.io/get-pip.py
python3.6 get-pip.py
mkdir /home/ubuntu/myproj/venv
python3.6 -m venv /home/ubuntu/myproj/venv
#Activate the venv
source /home/ubuntu/myproj/venv/bin/activate

python3现在在我的虚拟环境中指向3.6。

你是如何在16.04上安装Python 3.6的？我有一个伤害的世界让它不破坏事情。最后我从源码建立。有关详细信息，请参阅此gist。这个question解释了原因。这篇blog帖子给了我解决方案。

如何在位于非标准路径的Python 3.3安装中正确安装pip3？

1 个答案: