又皮了一下，依然很開心的薛盼盼烫映！
class Queue:
def __init__(self,max_size):
self.max_size = int(max_size)
self.queue = []
def put(self,data):
if self.max_size > 0:
if self.full():
raise ValueError('Queue is full!')
else:
self._put(data)
def get(self):
if self._queue_size() > 0:
result = self._get()
empty_flag = False
else:
result = None
empty_flag = True
return result
def empty(self):
if self._queue_size() == 0:
return True
else:
return False
def full(self):
if self._queue_size() == self.max_size:
return True
else:
return False
