def from_analysis_period(cls, analysis_period, tau_b, tau_d,
                             daylight_savings_indicator='No'):
        """"Initialize a RevisedClearSkyCondition from an analysis_period"""
        _check_analysis_period(analysis_period)
        return cls(analysis_period.st_month, analysis_period.st_day, tau_b, tau_d,
                   daylight_savings_indicator)
Initialize a RevisedClearSkyCondition from an analysis_period