pythonfrp is an attempt to bring reactive programming into python.
Simply put, reactive programming uses continuous time and data flow instead of explicit time.
The wikipedia article has a good explanation.
A simple hello world:
from pythonfrp.Engine import *
from pythonfrp.Printer import printer
printer(x = integral(1, 0))
start(tSteps = 10)
All documentation and more information can be found at reactive-engine.org