Python Class: Object-oriented advanced programming __iter__ and Next ()

website Explanation:

New in version 2.2.

• iterator.__iter__()

• Return the iterator object itself . This was required to allow both containers and iterators to being used with The for  and in statements. This method corresponds to The tp_iter  slot of the type structure for Python objects in the python/c API.

• iterator . next (

• Return the next item from the container. If There is no further items, raise the StopIteration exception. This method corresponds to the tp_iternext slot of the type structure for Python objects in the python/c API.

That is to say, __iter__ and next () are used in support.

Fibonacci Series:

#!/usr/bin/python

#-*-Coding:utf-8-*-

Class Fibo (object):

def __init__ (self):

SELF.A, self.b = 0, 1

def __iter__ (self):

return self

def __next__ (self):

SELF.A, self.b = self.b, SELF.A + self.b

If SELF.A > 10000:

Raise Stopiteration ()

Return SELF.A, self.b

For n in Fibo ():

Print n

Failed to run:

How do you use class to succeed?????

Later, only to find that my 2.7 version of the interpreter is not supported, using the PYTHON3 online programming interpreter on the Web is perfect to run ... is Ri le gou le.

Python3 Environment for use: http://www.dooccn.com/python3/

I would like to ask you guys, in the 2.7 version of how should I use __iter__?? Ask for advice!

Python Class: Object-oriented advanced programming __iter__ and next ()