How to Install the Pip Library from PyCharm

"Project: Project Name" > "Project Interpreter" from PyCharm Preferences will display a list of the Interpreters specified for the project and the libraries installed there.
There's a "+" button in the bottom left corner of the library list, and when you click on it, you'll see a pop-up window called "Available Packages." You can search the library incrementally, so you can select the library you want to install, and then type the "Install Packages" button.