def set_years(self, startyear=<NUM_LIT>, endyear=<NUM_LIT>):
<EOL>return self.set_config(<EOL>"<STR_LIT>",<EOL>"<STR_LIT>",<EOL>endyear=endyear,<EOL>startyear=startyear,<EOL>stepsperyear=<NUM_LIT:12>,<EOL>)<EOL>
Set the start and end dates of the simulations.

Parameters
----------
startyear : int
    Start year of the simulation

endyear : int
    End year of the simulation

Returns
-------
dict
    The contents of the namelist