First you will need to install required packages. Pip lets you manage Python packages easier and Python development headers are required to install the websocket-client package:
sudo apt-get install -y python-pip python2.7-dev
Install Python BlinkStick package:
sudo pip install blinkstick
Run the control script check if Raspberry Pi has detected BlinkStick correctly:
sudo blinkstick --info
You can find details about more examples in the readme.
If you don't want to sudo each time you want to access BlinkStick, then run the following command:
echo "SUBSYSTEM==\"usb\", ATTR{idVendor}==\"20a0\", ATTR{idProduct}==\"41e5\", MODE:=\"0666\" | sudo tee /etc/udev/rules.d/85-blinkstick.rules"
Raspberry Pi is capable of driving a USB hub and 4 BlinkSticks without any external powersupply.