Even before Edison was born, scientists had experimented with making light bulbs. These bulbs burned out after a few minutes. What Edison invented was the first incandescent light that was practical, that would light for hours and hours. He and his muckers also had to invent hundreds of other parts to make the light bulbs in your home work. Light switches, electric meters, wiring--all these had to be invented too.
The pip command is a tool for installing and managing Python packages, such as those found in the Python Package Index. It's a replacement for easy_install.
1 For information, see the WebSEAL Installation Guide.  Open a pdadmin command prompt from any node that has a Tivoli Access Manager run time component installed. This can be done on the Tivoli Access Manager Server node, WebSEAL node, or the WebSphere Portal node.