class Queue: |
def __init__( self ): |
self .items = [] |
def isEmpty( self ): |
return self .items = = [] |
def enqueue( self , item): |
self .items.insert( 0 , item) |
def dequeue( self ): |
return self .items.pop() |
def size( self ): |
return len ( self .items) |
# 调用 |
q = Queue() |
q.enqueue( 1 ) |
q.enqueue( 2 ) |
q.enqueue( 3 ) |
print (q.size()) |
print (q.dequeue()) |
print (q.dequeue()) |
print (q.dequeue()) |