First, install Mininet on your computer. In Debian/Ubuntu based systems, you just need to issue the following command to install Mininet:

$ sudo apt-get install mininet

Mininet must run as a root, as it should be able to access the programs installed in the host as the processes of the emulated nodes. Thus, this recipe needs to be run as root too, as it has a Mininet emulation.

While it is possible to make Mininet work in Python 3.x, by default it works on Python 2.7.x. Thus, you may need to install Python 2.7.x or later versions of Python 2, if you are using Python 3.x.