pogocase.py

class myStr(str):
    def pogoCase(self,jumpInt):
        return "".join([myCar.lower() if myInt % jumpInt else myCar.upper() for myInt, myCar in enumerate(self)])


thisThing = myStr("The quick brown fox jumped over the lazy dog.")
print thisThing
print thisThing.pogoCase(3)
print thisThing.pogoCase(2)
print type(thisThing) is str
print isinstance(thisThing, str)