[zahlman]

For "applications" (which are distributed on PyPI but include specified entry points for command-line use), yes. For development — installing libraries that your own code will use — you'll still generally need something else (although the restriction is really quite arbitrary).

[aunderscored]

Agreed! Sorry my read was for apps. You can use --user with pip to install into the user site rather than the system site, however it still causes overlap which can be problematic