查看python搜索包的路径的实现方法：

python搜索包的路径存储在sys.path下

查看方法：

import sys

sys.path

临时添加python搜索包路径的方法：

方法1：（先进入python）

import sys

sys.path.append(‘路径’)

（这种方式仅对当前python有效）

方法2：

export PYTHONPATH=路径

(这种方式对所有的python有效)

永久写入sys.path的方法：

方法1：

在已有的sys.path搜索路径下添加 .pth文件，文件内容格式为：

import site; site.addsitedir(“/usr/local/lib/python2.7/site-packages”)

方法2：

在home文件夹下的.bash_profile文件中添加下面一行：

export PYTHONPATH=路径

注意，启动不同的python之后sys.path的值是不同的，例如：

启动conda下的python是sys.path的值

[

”,

‘/Users/zj_macbook/anaconda/lib/python27.zip’,

‘/Users/zj_macbook/anaconda/lib/python2.7’,

‘/Users/zj_macbook/anaconda/lib/python2.7/plat-darwin’,

‘/Users/zj_macbook/anaconda/lib/python2.7/plat-mac’,

‘/Users/zj_macbook/anaconda/lib/python2.7/plat-mac/lib-scriptpackages’,

‘/Users/zj_macbook/anaconda/lib/python2.7/lib-tk’,

‘/Users/zj_macbook/anaconda/lib/python2.7/lib-old’,

‘/Users/zj_macbook/anaconda/lib/python2.7/lib-dynload’,

‘/Users/zj_macbook/anaconda/lib/python2.7/site-packages’,

‘/Users/zj_macbook/anaconda/lib/python2.7/site-packages/Sphinx-1.4.6-py2.7.egg’,

‘/Users/zj_macbook/anaconda/lib/python2.7/site-packages/aeosa’,

‘/Users/zj_macbook/anaconda/lib/python2.7/site-packages/setuptools-27.2.0-py2.7.egg’

]

启动

/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python

的python的sys.path的值

[

”,

‘/usr/local/lib/python2.7/site-packages/six-1.10.0-py2.7.egg’,

‘/Library/Python/2.7/site-packages/twilio-6.3.dev0-py2.7.egg’,

‘/Library/Python/2.7/site-packages/httplib2-0.9.2-py2.7.egg’,

‘/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip’,

‘/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7’,

‘/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin’,

‘/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac’,

‘/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages’,

‘/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk’,

‘/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old’,

‘/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload’,

‘/Users/zj_macbook/Library/Python/2.7/lib/python/site-packages’,