How to install library for Python 3.5.1 using pip on windows?

Question

Python

I have python 3.5.1 installed. When you type pip install pillow on the command line, it gives the answer: "pip" is not an internal or external command, executable program, or batch file ( How to install packages for Python with pip on windows? , the tutorial on which I studied the theory also shows a similar installation method pip install library_name). Google didn't come up with an answer that would help.
I need a library to display images in canvas. In the official The standard library documents list a PIL library that has been deprecated. She was replaced by Pillow. The pypi location is https://pypi.python.org/pypi/Pillow/3.1.0rc1. How can I install the library, if not through the line, then at least manually.
Dear programmers, I ask you to give the answer in a language that is understandable for an uninitiated person, so that even a child can understand. Thanks to!

Answer 1

The fact is that you have a folder where pip is not registered in PATH.
PATH is a system variable that contains a list (a string separated by semicolons) of folders where Windows needs to look for the command you need if you didn't specify the path to it. You can add the path to the pip folder there (you probably have it like this: C:\ Python35
\Scripts\) here:
No matter how much I tried, Windows still changed it.
Therefore, you just go to the C:\Python35\Scripts\ folder, press the right button with the Shift key pressed and launch the command line (in the menu list). And there you already write pip install Pillow.