"""circle_cm module: contains the Circle class."""
class Circle:
    """Circle class"""
    all_circles = []    
                     #A
    pi = 3.14159
    def __init__(self, r=1):
        """Create a Circle with the given radius"""
        self.radius = r
        self.__class__.all_circles.append(self)
    def area(self):
        """determine the area of the Circle"""
        return self.__class__.pi * self.radius * self.radius

    @classmethod                            #1
    def total_area(cls):  
                             #2
        total = 0
        for c in cls.all_circles:  
                    #3
            total = total + c.area()
        return total