def _make_forecast_options(forecast_years):
    if (forecast_years is None):
        return ''
    forecast_spec = 'forecast{\n'
    forecast_spec += 'maxlead = ({0})\n}}\n'.format(forecast_years)
    return forecast_spec
def _make_forecast_options(forecast_years):
    if (forecast_years is None):
        return 
    forecast_spec = 'forecast{\n'
    forecast_spec += 'maxlead = ({0})\n}}\n'.format(forecast_years)
    return forecast_spec