I'm kind of a newbie and want to use Python on Emacs.

I noticed that there is a folder rpc-venv here:

```
/Users/user/.emacs/elpy/rpc-venv/lib/python3.7/site-packages

```

Where all python packages are installed.

Why are these files copied here?
Why is Emacs not using the already installed files from the system?

Thanks!