Using virtualenvs is standard practice when developing with Python. What the OP did will work with every standard Python installation out there.
Most Python developers have virtualenv creation done for them via their IDE or scripts that vastly simplify the process so that you don't need to bother with the details in the OP.
Most Python developers have virtualenv creation done for them via their IDE or scripts that vastly simplify the process so that you don't need to bother with the details in the OP.