Question: Blender comes with Python, and includes a stand-alone Python executable.
However pip is not part of the official Python distribution so it needs to be added separately.

* How do you setup `pip` with Blender's bundled Python so it can be used to install Python packages from [Pypi](https://pypi.org/) which are then available from inside Blender?
* How would you use it to install a package?

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Note, this is related to [this question](https://blender.stackexchange.com/questions/14489/), but not a duplicate since its not about using pip as a library.

Answer: 
On Debian, using the Debian-packaged version of Blender, as far as I can tell, a system python executable is used.

For 2.78, I was able to do the following:

```
# apt-get install python3-pip
# pip3 install python-package-name

```

After that, the pip-installed package was available from within Blender.
Install Packages for Windows User (After Pip works)

1. Go to Blender Python **/bin** ( not just "/" !)
2. (example) `cd D:\Program Files\Blender Foundation\Blender 3.4\3.4\python\bin`
3. **D:\Program Files\Blender Foundation\Blender 3.4\3.4\python\bin**>
4. Run `python.exe -m pip install YOUR-Package`

[![enter image description here](https://i.stack.imgur.com/1vIY9.png)](https://i.stack.imgur.com/1vIY9.png)