Error: Microsoft Visual C + + 14.0 is required. Get it with Microsoft Visual C + +

Error: Microsoft Visual C + + 14.0 is required. Get it with “build tools for visual studio”: https://visualstudio.microsoft.com/downloads/

Finally, a Microsoft Visual C + + build tools 2015
is found https://go.microsoft.com/fwlink/?LinkId=691126
The file name is: visual cppbuildtools full, download and install.

Double click visual cppbuilder tools_ full.exe , select the default, click Install, and wait about 10 minutes to complete the installation.
Then install the PIP library.