1.下载源码zip源码，https://github.com/requests/requests

2.下载  ZIP包，安装说明：

   Once you have a copy of the source, you can embed it in your own Python package, or install it into your site-packages easily:

$ cd requests
$ pip install .

3.把requests-master解压到python目录

cd 到 requests-master 

运行 pip install .

它自动从pypi下载相关的依赖包，比如，它下载和安装了certifi  , chardet , idna , urllib3

4.另外一种方法：

cmd 进入py D:\python\requests-master

输入命令：python setup.py install 回车即可