How to create a python class contains empty list, add points to it, and return cordinates of points as tuple

Question

I need some help in python oop, I want to create an empty list as an instance in a python class, then add a method that appends points in that empty list, and add a string method that returns the coordinates of all points, like ( x1,y1) (x2,y2) (x3,y3 ) . . . (xn,yn ) here is my code but it's not working:

class Foo:

    # This list is initially empty
    def __init__(self, lst):
        self.lst = []
        
    # append_point method which takes a point as an argument and  
    # adds points to the instance variable.
    def append_point(self, **point):
        self.lst.append(point)
        return tuple(self.lst)
    # returns the coordinates of all points
    def __str__(self):
        return f'cordinates : {self.lst}'

if __name__ == '__main__':

    cor = Foo([1,2,4,3,5,7])
    print(cor)

Answer 1

class Points:
    def __init__(self, points=None):
        if points is None:
            points = []
        self.points = points
        
    def add_point(self, point):
        self.points.append(point)
        
    def __str__(self):
        return f'Points coordinates: {self.points}'
    
points = Points([(0,0),(0,1)])
points.add_point((1,1))

print(points)

Output:

Points coordinates: [(0, 0), (0, 1), (1, 1)]