Pip 是安装python包的工具，提供了安装包，列出已经安装的包，升级包以及卸载包的功能。

Pip 是对easy_install的取代，提供了和easy_install相同的查找包的功能，因此可以使用easy_install安装的包也同样可以使用pip进行安装。

二、Linux下的源配置

检查pip.conf文件是否存在

>> cd ~

>> mkdir .pip

>> ls ~/.pip

三、编辑源

方案1： 直接编辑pip.conf

sudo vi ~/.pip/pip.conf

[global] 
index-url = http://mirrors.aliyun.com/pypi/simple/ 
[install] 
trusted-host=mirrors.aliyun.com 

方案2：

pip install turtle --trusted-host mirrors.aliyun.com 

四、测试对比

使用默认源的速度：

 Downloading alembic-0.8.0.tar.gz (918kB) 
 100% |████████████████████████████████| 921kB 9.9kB/s 
Collecting beautifulsoup4==4.4.1 (from -r requirements.txt (line 2)) 
 Downloading beautifulsoup4-4.4.1-py2-none-any.whl (81kB) 
 100% |████████████████████████████████| 81kB 5.2kB/s 
Collecting cffi==1.2.1 (from -r requirements.txt (line 3)) 
 Downloading cffi-1.2.1.tar.gz (335kB) 
 100% |████████████████████████████████| 337kB 15kB/s 
Collecting chardet==2.3.0 (from -r requirements.txt (line 4)) 
 Downloading chardet-2.3.0.tar.gz (1kB) 
 100% |████████████████████████████████| 174kB 9.4kB/s 
Collecting cryptography==1.0 (from -r requirements.txt (line 5)) 
 Downloading cryptography-1.0.tar.gz (331kB) 
 100% |████████████████████████████████| 337kB 7.1kB/s 
Collecting Django==1.8.4 (from -r requirements.txt (line 6)) 
 Downloading Django-1.8.4-py2.py3-none-any.whl (6.2MB) 
 100% |████████████████████████████████| 6.2MB 16kB/s 

使用国内源的速度：

Collecting alembic==0.8.0 (from -r requirements.txt (line 1)) 
 Downloading http://mirrors.aliyun.com/pypi/packages/9f/e6/d261c6958d418bcb542b8f79fae7fcf14f7f7f1d42c4ed86a499d690/alembic-0.8.0.tar.gz (918kB) 
 100% |████████████████████████████████| 921kB 160kB/s 
Collecting beautifulsoup4==4.4.1 (from -r requirements.txt (line 2)) 
 Downloading http://mirrors.aliyun.com/pypi/packages/33/62/f3e97eaa87fc4de0cb9b8c51d253cf0df621c6de6b251dcbab203e5ff7/beautifulsoup4-4.4.1-py2-none-any.whl (81kB) 
 100% |████████████████████████████████| 81kB 630kB/s 
Collecting cffi==1.2.1 (from -r requirements.txt (line 3)) 
 Downloading http://mirrors.aliyun.com/pypi/packages/22/86/b4ae6aeec29105cd2faa07ed2f7349fbcad502d880cb504dca84368853/cffi-1.2.1.tar.gz (335kB) 
 100% |████████████████████████████████| 337kB 1.4MB/s 
Collecting chardet==2.3.0 (from -r requirements.txt (line 4)) 
 Downloading http://mirrors.aliyun.com/pypi/packages/7d/87/4e3a3f38b2f5c578ce44f8dc2aa053217de9f0b6d737739b0ddac38ed237/chardet-2.3.0.tar.gz (1kB) 
 100% |████████████████████████████████| 174kB 1.1MB/s 
Collecting cryptography==1.0 (from -r requirements.txt (line 5)) 
 Downloading http://mirrors.aliyun.com/pypi/packages/60/1f/8cf32f1fa61efafea7d4fcdcb5080c073f99ada1d2a436527bc392f2f8ea/cryptography-1.0.tar.gz (331kB) 
 100% |████████████████████████████████| 337kB 1.3MB/s 
Collecting Django==1.8.4 (from -r requirements.txt (line 6)) 

相对而言，速度提升了不是一点半点，而是飞一样的提升。

5. 总结

好了，