The Critter Program

The following is a very simple program that demonstrates creating an instance of a class.

The class also contains:

• __init__() - constructor for the class.
• total - a class attribute which tracks the number of instances of the class created.
• status - a static method that prints out how many instances of the class are created using the class attribute total.

class Critter:
  """A virtual critter class"""
  total = 0

  def __init__(self, name):
   print("A critter has been born!")
   self.name = name
   Critter.total += 1

  # this stops the first argument being the instance
  @staticmethod
  def status():
    print("\nThe total number of critters is", Critter.total)

def main():
  print("Accessing the class attribute Critter.total:", end=" ")
  print(Critter.total)
  print("\nCreating critters.")
  crit_one = Critter("critter 1")
  crit_two = Critter("critter 2")
  crit_three = Critter("critter 3")
  Critter.status()
  print("\nAccessing the class attribute through an object:", end= " ")
  print(crit_one.total)
  input("\n\nPress the enter key to exit.")
  

if __name__ == "__main__":  
  main()