liarsparadox.py

import random
def thisIsALie(currentValue,counter,depthToGiveUp):
    if(counter==depthToGiveUp):
        quit()
    if(currentValue):
        print("this is not a lie")
    else:
        print("this is a lie")
    currentValue= not currentValue 
    return thisIsALie(currentValue,counter+1,depthToGiveUp)


initialValueTrue=True;
depthToGiveUp=random.randint(1,15)
thisIsALie(initialValueTrue,0,depthToGiveUp)

##output follows
$ python liarsparadox.py 
this is not a lie
this is a lie
this is not a lie
this is a lie
this is not a lie
this is a lie
this is not a lie
this is a lie
this is not a lie