直接应用 pip3 install django -i http://mirrors.aliyun.com/pypi/simple --trusted-host mirrors.aliyun.com
windows系统：
1.用户目录下新建pip目录
2.vi pip.ini
[global]
timeout=600
index-url = http://pypi.douban.com/simple
[install]
trusted-host=pypi.douban.com
Linux系统：
pip下载
# wget "https://pypi.python.org/packages/source/p/pip/pip-1.5.4.tar.gz#md5=834b2904f92d46aaa333267fb1c922bb" --no-check-certificate
tar -xzvf pip-1.5.4.tar.gz
cd pip-1.5.4
python setup.py install
vi .pip/pip.conf
[global]
timeout=600
index-url = http://pypi.douban.com/simple
[install]
trusted-host=pypi.douban.com
pip install --upgrade pip
ln -sv /usr/local/bin/pip /usr/bin/pip
