新岗位需要用python，之前没写过python，用循环数组实现一个定长队列玩一下：
#!/usr/bin/python
# -*- coding: UTF-8 -*-
class CirArray:
readind = 0
writeind = 0
fullFlag = False
emptyFlag = True
def __init__(self, queneSize):
if isinstance(queneSize, int) and queneSize >0:
self.MAX_SIZE = queneSize
self.DataSet = [0 for n in range(self.MAX_SIZE)]
else:
raise Exception('queneSize is invalid');
def CirPop(self):
if self.emptyFlag:
print 'quene is empty and get failed'
print "the quene is:",self.DataSet
return False
self.readind = (self.readind + 1)%self.MAX_SIZE
print "pop value: ",self.DataSet[self.readind]
self.DataSet[self.readind] = 0
if self.writeind == self.readind:
self.emptyFlag = True
print 'quene is empty'
print "the quene is:",self.DataSet
def CirPush(self, num):
if self.fullFlag:
print 'quene is full and insert failed'
print "the quene is:",self.DataSet
return False
self.writeind = (self.writeind + 1)%self.MAX_SIZE
self.DataSet[self.writeind] = num
print "push success:",num
if self.emptyFlag:
self.emptyFlag = False
if self.writeind == self.readind:
self.fullFlag = True
print 'quene is full'
print "the quene is:",self.DataSet
testArr = CirArray(10)
testArr.CirPush(1)
testArr.CirPush(3)
testArr.CirPop()
想说一下：
1、python类中使用成员变量写self好麻烦，简直赶上php的$了
2、后面可以改进成用动态数组实现不定长队列
3、只有pop和push函数没法发挥底层数组实现的优势，可以添加随机访问的接口
就到这里了，今后要经常写python了，先混个脸熟呗
