apt-get and pip

Often both can be used when installing python packages. If apt is used, the installed python package will still be visible when using "pip list".

One issue with apt is that the package versions might be somewhat old.

Example (raspberry pi running debian jessie):
sudo pip install pyserial, pip list says pyserial 3.1.1

sudo apt-get install python-serial, pip list says pyserial 2.6