I have red at the help-page of easy_install that I have an ability to do "install in user site-package". What does this phase mean, "user site-package"? How does it affect functionality of the installed software?
User site-package refers to packages installed in ~/.local/lib[64]/python-VERSION/site-packages/
These packages are available as any other installed packages, but only to this specific user. It overrides system packages too.