class Bucket:

    def __init__(self, size):
        self.size = size
        self.freeSize = 0
        self.contains = []

    def throwToBucket(self, obj):
        if obj.size < self.freeSize:
            print("Bucket is full")
            return
        self.contains.append(obj)
        self.freeSize = self.freeSize + obj.size


class Pen:

    def __init__(self):
        self.size = 1



newBucket = Bucket(2)

newPen = Pen()
newPen2 = Pen()
newPen3 = Pen()

newBucket.throwToBucket(newPen)
newBucket.throwToBucket(newPen2)
newBucket.throwToBucket(newPen3)

print(newBucket.contains)
print(newBucket.size)