python中迭代器（iterator）用法实例分析

Tabitha ·

更新时间:2024-09-20

· 662 次阅读

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: Kevin Harris
# Last Modified: 03/11/04
# Description: This Python script demonstrates how to use iterators.
#---------------------------------------
myTuple = (1, 2, 3, 4)
myIterator = iter( myTuple )
print( next( myIterator ) )
print( next( myIterator ) )
print( next( myIterator ) )
print( next( myIterator ) )
# Becareful, one more call to next() 
# and this script will throw an exception!
#print myIterator.next() 
print( " " )
#---------------------------------------
# If you have no idea how many items 
# can be safely accesd via the iterator,
# use a try/except block to keep your script from crashing.
myTuple2 = ( "one", "two", "three", "four" )
myIterator2 = iter( myTuple2 )
while 1:
  try:
    print( next( myIterator2 ) )
  except StopIteration:
    print( "Exception caught! Iterator must be empty!" )
    break
input( '\n\nPress Enter to exit...' )

希望本文所述对大家的Python程序设计有所帮助。

您可能感兴趣的文章:深入讲解Python中的迭代器和生成器Python中Iterator迭代器的使用杂谈Python中生成器和迭代器的区别详解详解Python3中的迭代器和生成器及其区别举例讲解Python中的迭代器、生成器与列表解析用法Python用zip函数同时遍历多个迭代器示例详解老生常谈Python之装饰器、迭代器和生成器解析Python中的生成器及其与迭代器的差异Python使用迭代器捕获Generator返回值的方法python迭代器常见用法实例分析

迭代 iterator 迭代器 Python

1024 个赞