gistfile1.py

class Location:
  def __init__(self):
    pass
    
  def degreesPerHour(self):
    return self.degreesAtNoon / ((self.sunSetsAt - self.sunRisesAt) / 2)


class Forecast:
  def __init__(self, startsAt):
    self.startsAt = startsAt
    pass

  def sunDegrees(self):
    if self.startsAt < self.location.sunRisesAt or self.startsAt > self.location.sunSetsAt:
      return 0
      
    else:
      factor = self.location.degreesPerHour()
      numberOfHours = self.startsAt - self.location.sunRisesAt
      return factor * numberOfHours

  
  
l = Location()
l.sunRisesAt = 8
l.sunSetsAt = 16
l.degreesAtNoon = 90.0

f1 = Forecast(11)
f2 = Forecast(8)
f3 = Forecast(9)
f4 = Forecast(12)
f5 = Forecast(16)

forecasts = [f1, f2, f3, f4, f5]

for forecast in forecasts:
  forecast.location = l
  print forecast.startsAt
  print forecast.sunDegrees()