python中迭代器（iterator）用法实例分析
本文实例讲述了python中迭代器（iterator）用法。分享给大家供大家参考。具体如下：
#---------------------------------------
#Name:iterators.py
#Author:KevinHarris
#LastModified:03/11/04
#Description:ThisPythonscriptdemonstrateshowtouseiterators.
#---------------------------------------
myTuple=(1,2,3,4)
myIterator=iter(myTuple)
print(next(myIterator))
print(next(myIterator))
print(next(myIterator))
print(next(myIterator))
#Becareful,onemorecalltonext()
#andthisscriptwillthrowanexception!
#printmyIterator.next()
print("")
#---------------------------------------
#Ifyouhavenoideahowmanyitems
#canbesafelyaccesdviatheiterator,
#useatry/exceptblocktokeepyourscriptfromcrashing.
myTuple2=("one","two","three","four")
myIterator2=iter(myTuple2)
while1:
try:
print(next(myIterator2))
exceptStopIteration:
print("Exceptioncaught!Iteratormustbeempty!")
break
input('\n\nPressEntertoexit...')
希望本文所述对大家的Python程序设计有所帮助。
热门推荐
10 喜得孙子祝福语简短唯美
11 婚礼祝福语简短朴实大众
12 员工周年祝福语大全简短
13 家长回复节日祝福语简短
14 简短生日祝福语老同学
15 夜雨祝福语简短10字
16 蛋糕祝福语简短闺蜜
17 部门过年祝福语简短独特
18 简短精炼的结婚祝福语