python添加pth文件，支持第三方模块

## 添加pth文件，支持第三方模块

在site-packages/ 增加路径，这种方法一劳永逸， 简单暴力。
举个例子，将/tmp/增加到sys.path
首先cd到指定python的sit-packages/目录下，然后创建一个文件，例如test.pth，在文件中增加/tmp/路径信息，保存退出。

[root@instance-jl0wxuf5 python]# python -m site
sys.path = [
    '/home/dir/python',
    '/root/anaconda3/envs/weixin/lib/python36.zip',
    '/root/anaconda3/envs/weixin/lib/python3.6',
    '/root/anaconda3/envs/weixin/lib/python3.6/lib-dynload',
    '/root/anaconda3/envs/weixin/lib/python3.6/site-packages',
]
[root@instance-jl0wxuf5 python]# cd /root/anaconda3/envs/weixin/lib/python3.6/site-packages

vim test.pth
$
/home/dir/python/spyder_projdect_py/bot_weixin/
$
[root@instance-jl0wxuf5 site-packages]# cat test.pth
/home/dir/python/spyder_projdect_py/bot_weixin/

[root@instance-jl0wxuf5 site-packages]# python
Python 3.6.2 |Continuum Analytics, Inc.| (default, Jul 20 2017, 13:51:32) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/root/anaconda3/envs/weixin/lib/python36.zip', '/root/anaconda3/envs/weixin/lib/python3.6', '/root/anaconda3/envs/weixin/lib/python3.6/lib-dynload', '/root/anaconda3/envs/weixin/lib/python3.6/site-packages', '/home/dir/python/spyder_projdect_py/bot_weixin']
>>> quit();

• python的sys.path（环境变量）简单总结 - shenhailuanma - OSCHINA