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Adapt ImpactCalc._return_empty and _return_impact to return ImpactForecast #1138
Description
Modify ImpactCalc class so that _return_empty and _return_impact checks if hazard is instance of Hazard or HazardForecast class and calls appropriate methods to return Impact or ImpactForecast object accordingly.
Implementation:
if IsInstance(self.hazard, HazardForecast):
return ImpactForecast().from_impact(impact, self.hazard.ensemble_member, self.hazard.lead_time) #return ImpactForecast object
else:
return impact #return normal impact object if hazard is not a HazardForecast
Test draft; run an impact calculation:
hazard = HazardForecast(...)
exposure = Exposure(...)
impf = ImpactFuncSet(...)
impact = ImpactCalc(exposure, impf, hazard).impact()
assert isinstance(impact, ImpactForecast)
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