相关疑难解决方法(0)

我的linuxbox上有两个版本的python:

$python
Python 2.6.6 (r266:84292, Jul 10 2013, 22:48:45) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 


$ /usr/local/bin/python2.7
Python 2.7.3 (default, Oct  8 2013, 15:53:09) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 

$ which python
/usr/bin/python
$ ls -al /usr/bin/python
-rwxr-xr-x. 2 root root 4864 Jul 10 22:49 /usr/bin/python

我怎样才能使2.7成为默认版本,所以当我输入python它时我会把它放到2.7？

我正在尝试安装PyQueryvia pip但是我收到了一个我不明白的错误.我使用的命令是:

sudo pip install pyquery

我得到以下输出:

Requirement already satisfied (use --upgrade to upgrade): pyquery in /usr/local/lib/python2.7/dist-packages
Downloading/unpacking lxml>=2.1 (from pyquery)
Running setup.py egg_info for package lxml
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'bugtrack_url'
  warnings.warn(msg)
Building lxml version 3.3.0.
Building without Cython.
ERROR: /bin/sh: 1: xslt-config: not found

** make sure the development packages of libxml2 and libxslt are installed **

Using build configuration of libxslt

Downloading/unpacking cssselect (from pyquery)
Running setup.py egg_info for package cssselect

no previously-included …

我的 CentOS 机器中安装了 python2.6 和 python2.7。python2.6安装在/usr/bin/python，我已经从位置的源安装了python2.7/usr/local/bin/python

安装后我的默认 python 更改为 python2.7 而不是 pythn2.6 at /usr/bin，我想使用 python 2.6 at /usr/bin/python。我已经尝试过以下事情已经没有任何效果。

1. 我创建了符号链接并将其指向 python 2.6 at /usr/bin
2. 我在 .bash_profile 中修改了我的默认 python 路径，但这仍然不起作用

请让我知道如何安装 python 2.7 和 2.6，并将 python 2.6 作为我的默认版本。我的 arch linux 盒子也有同样的事情，但这不适用于我的 centos 盒子。

附上我的 .bash_profile，

# .bash_profile

export _BASH_PROFILE=1

# Get the aliases and functions
if [ -z "$_BASHRC" ]; then
        . ~/.bashrc
fi

unset _BASH_PROFILE

# User specific environment and startup programs

PATH=$PATH:$HOME/bin
BASH_ENV=$HOME/.bashrc
USERNAME=""

export …