Pip is a wide used python package management tool, it works properly most of the time. But occasionally there will be a few error when install some special package which may required local build after download.
Here are two common ways to resolve these kinds of error
1. Use a prebuild binary, the most common library could be download from here. But the links seems dead for a while.
2. Install the necessary Cpp compiler for python 2.7 on window from here
After install the compiler rerun the pip install
Good luck!