关于pip install （模块）报错
以安装web2模块为例:
Cannot fetch index base *
Could not find any downloads that satisfy the requirement*
root@server:~# pip install web2py
Downloading/unpacking web2py
Cannot fetch index base URL http://pypi.python.org/simple/
Could not find any downloads that satisfy the requirement web2py
No distributions at all found for web2py
Storing complete log in /root/.pip/pip.log
解决方法 -i http://pypi.douban.com/simple/
pip install web2py -i http://pypi.douban.com/simple/
