本文實例講述了python中迭代器（iterator）用法。分享給大家供大家參考。具體如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
#---------------------------------------# 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!" ) breakinput( '\n\nPress Enter to exit...' ) |
希望本文所述對大家的Python程序設計有所幫助。
