空了没有

运行下面这段程序：

class CQueue:
    def __init__(self, cap=4):
        self.data = [None] * cap
        self.head = 0
        self.count = 0
    def enqueue(self, x):
        self.data[(self.head + self.count) % len(self.data)] = x
        self.count += 1
    def dequeue(self):
        x = self.data[self.head]
        self.head = (self.head + 1) % len(self.data)
        self.count -= 1
        return x

q = CQueue(4)
for x in ["阿岚", "小满", "阿泰", "南风"]:
    q.enqueue(x)
for _ in range(4):
    q.dequeue()
print(q.count == 0)