old_contents: https://docs.djangoproject.com/en/dev/ref/models/fields/
  
  class City(models.Model):
    
    name = models.CharField(max_length = 50)
    population = models.IntegerField(default = 0)
    square_miles = models.IntegerField(default = 0)
    square_miles_track = models.IntegerField(default = 0)
    avg_annual_riders = models.IntegerField(default = 0)
    cost_tix = models.IntegerField (default = 0) -----find decimal
    num_stations = models.IntegerField(default = 0)
    
    
    
    
  class Stations(models.Model):
    key_facts = models.CharField(max_length=500)
    ownership = models.CharField(max_length= 500)
    percent_grwth = models.IntegerField(default = 0 )
    yr_built = models.CharField(default = 0)
      
    
  
  
new_contents: https://docs.djangoproject.com/en/dev/ref/models/fields/
  from django.db import models
  
  class City(models.Model):
    
    name = models.CharField(max_length = 50)
    population = models.IntegerField(default = 0)
    square_miles = models.IntegerField(default = 0)
    square_miles_track = models.IntegerField(default = 0)
    avg_annual_riders = models.IntegerField(default = 0)
    cost_tix = models.IntegerField (default = 0) -----find decimal
    num_stations = models.IntegerField(default = 0)
    
  # This is a guess v ----- I don't really know what's up ---------------------
  
    # storedCity = models.DateTimeField(auto_now_add= True)
    # parent = models.pForeignKey(City)
  
    # def storedCity(self, newCity):
  
    #   self.name = newCity.name
    #   self.population = newCity.population
    #   self.square_miles = newCity.square_miles
    #   self.square_miles_track = newCity.square_miles_track
    #   self. avg_annual_riders = newCity.avg_annual_riders
    #   sef.cost_tix= newCity.cost_tix
    #   self. num_stations= newCity.num_stations
  #------------------------------------------------------------------------------------
    
    
  class Stations(models.Model):
    key_facts = models.CharField(max_length=500)
    ownership = models.CharField(max_length= 500)
    percent_grwth = models.IntegerField(default = 0 )
    yr_built = models.CharField(default = 0)
      
  # Also a guess... still don't know ------------------
  
    # def storedStations(self, newStation):
    #   self.key_facts = newStation.key_facts
    #   self.ownership = newStation.ownership
    #   self.percent_grwth = newStation.percent_grwth
    #   self.yr_built = newStation.yr_built
    
  #------------------------------------------------------------------------------------
  
subject: Update models.py