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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def simindices(self):
 """Tuple containing the start and end index of the simulation period regarding the initialization period defined by the |Timegrids| object stored in module |pub|."""

        return (hydpy.pub.timegrids.init[hydpy.pub.timegrids.sim.firstdate],
                hydpy.pub.timegrids.init[hydpy.pub.timegrids.sim.lastdate])