仿写一个类实现队列

仿写自博客 http://www.cnblogs.com/chongyou/p/7099326.html
class Node(object):

    def  __init__(self,val):

        self.value = val

        self.next = None

class myquene(object):

    def __init__(self):

        self.first = None

        self.last = None

        # self.next = None

    def enter(self,x):

        n = Node(x)

        if self.first ==None:

            self.first = n

            self.last = self.first

        else:

            self.last.next = n

            self.last = n

    def quit(self):

        if not self.first:

            return None

        else:

            tmp = self.first.value

            self.first = self.first.next

            return tmp


    def quit_all(self):

        retlist = []

        while self.first!=None:

            retlist.append(self.first.value)

            self.first = self.first.next

        return retlist

if __name__ =="__main__":

    q = myquene()

    q.enter('厉智')

    q.enter('徐晓冬')

    q.enter('陈培昌')

    q.enter('程劲')

    print(q.quit_all())