On Wed, Apr 1, 2015 at 2:03 AM, Albert van der Horst <alb...@spenarnc.xs4all.nl> wrote: > class Squares: > def __init__(self): > self.i = 0 > def __next__(self): > self.i += 1 > return self.i**2 > def __iter__(self): > return self > > albert@cherry:/tmp$ python > Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48) > [GCC 4.4.5] on linux2 > Type "help", "copyright", "credits" or "license" for more information. >>>> from aap import * >>>> for i in Squares(): > ... print i > ... if i>50: break > ... > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > TypeError: instance has no next() method >>>> > > / -------------------------- > > Probably not what is intended. > > Last minute note: > renaming __next__() into next() did the job.
That class was written for Python 3, not Python 2. In Py2, you need to rename __next__ to next, as you noted, and you probably also want to explicitly subclass object. Or just run it under Python 3. :) ChrisA -- https://mail.python.org/mailman/listinfo/python-list
