old_contents: class GameData(object):
  
      def __init__(self):
          self.habitatmaterial = 0
          self.habitats = 0
          self.habitatcost = 2
          self.habitatproductivity = 2
  
      def setHabitatMaterial(self, n):
          self.habitatmaterial = n
  
      def addHabitatMaterial(self, n):
          self.habitatmaterial = self.habitatmaterial + int(n)
  
      def getHabitatMaterial(self):
          return self.habitatmaterial
  
      def getHabitats(self):
          return self.habitats
  
      def makeHabitats(self, number):
          n = int(number)
          self.habitatmaterial = self.habitatmaterial - n*self.habitatcost
          self.habitats = self.habitats + n
  
      def produce(self):
          self.habitatmaterial = self.habitatmaterial + self.habitats*self.habitatproductivity
new_contents: class GameData(object):
  
      def __init__(self):
          self.habitatmaterial = 4
          self.habitats = 0
          self.habitatcost = 2
          self.habitatproductivity = 2
  
      def setHabitatMaterial(self, n):
          self.habitatmaterial = n
  
      def addHabitatMaterial(self, n):
          self.habitatmaterial = self.habitatmaterial + int(n)
  
      def getHabitatMaterial(self):
          return self.habitatmaterial
  
      def getHabitats(self):
          return self.habitats
  
      def makeHabitats(self, number):
          n = int(number)
          self.habitatmaterial = self.habitatmaterial - n*self.habitatcost
          self.habitats = self.habitats + n
  
      def produce(self):
          self.habitatmaterial = self.habitatmaterial + self.habitats*self.habitatproductivity
subject: Tweak of numbers.