如何告诉Python比/usr/lib/python更喜欢$ HOME/lib/python中的模块?

问题描述

在Python中，我收到一个错误消息，因为它正在从/usr/lib/python2.6/site-packages加载模块，但我希望它在$HOME/python-modules/lib/python2.6/site-packages中使用我的版本，该版本是使用pip-python --install-option="--prefix=$HOME/python-modules --ignore-installed

安装的

如何告诉Python使用我的库版本?将PYTHONPATH设置为$HOME/python-modules/lib/python2.6/site-packages并没有帮助，因为/usr/lib/...显然具有优先权.

解决方案

看看网站模块，用于自定义环境.

一种实现此目的的方法是将文件添加到当前在sys.path上名为usercustomize.py的位置，当Python启动时，它将自动导入该文件，您可以使用它来修改sys.path. /p>

首先，将$PYTHONPATH设置为$HOME(如果$PYTHONPATH具有值，则添加$HOME)，然后创建具有以下内容的文件$HOME/usercustomize.py:

import sys, os
my_site = os.path.join(os.environ['HOME'],
                       'python-modules/lib/python2.6/site-packages')
sys.path.insert(0, my_site)

现在，当您启动Python时，应该在sys.path系统默认值之前看到自定义site-packages目录.

In Python, I'm getting an error because it's loading a module from /usr/lib/python2.6/site-packages but I'd like it to use my version in $HOME/python-modules/lib/python2.6/site-packages, which I installed using pip-python --install-option="--prefix=$HOME/python-modules --ignore-installed

How can I tell Python to use my version of the library? Setting PYTHONPATH to $HOME/python-modules/lib/python2.6/site-packages doesn't help, since /usr/lib/... apparently has precedence.

解决方案

Take a look at the site module for ways to customize your environment.

One way to accomplish this is to add a file to a location currently on sys.path called usercustomize.py, when Python is starting up it will automatically import this file, and you can use it to modify sys.path.

First, set $PYTHONPATH to $HOME (or add $HOME if $PYTHONPATH has a value), then create the file $HOME/usercustomize.py with the following contents:

import sys, os
my_site = os.path.join(os.environ['HOME'],
                       'python-modules/lib/python2.6/site-packages')
sys.path.insert(0, my_site)

Now when you start Python you should see your custom site-packages directory before the system default on sys.path.

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