class Rectangle:
recs = []
def __init__(self, w, l):
self.width = w
self.len = l
self.recs.append((self.width, self.len))
def print_size(self):
print("""{} by {}""".format(self.width, self.len))
r1 = Rectangle(10, 24)
r2 = Rectangle(20, 40)
r3 = Rectangle(100, 200)
print(Rectangle.recs)