Comments on: User-defined iterators in Python http://inspirated.com/2009/05/14/user-defined-iterators-in-python krkhan's blog Mon, 06 Feb 2012 18:55:18 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: krkhan http://inspirated.com/2009/05/14/user-defined-iterators-in-python/comment-page-1#comment-38578 krkhan Mon, 13 Dec 2010 23:48:07 +0000 http://www.inspirated.com/wordpress/?p=219#comment-38578 Ray, you have to use the __setitem__ method to override [] operator. Here's an example: <blockquote><code>>>> class A: ... def __setitem__(self, index, value): ... print index, value ... >>> a = A() >>> a[23] = 45 23 45</code></blockquote> Ray, you have to use the __setitem__ method to override [] operator. Here’s an example:

>>> class A:
... def __setitem__(self, index, value):
... print index, value
...
>>> a = A()
>>> a[23] = 45
23 45

]]> By: Ray Wood http://inspirated.com/2009/05/14/user-defined-iterators-in-python/comment-page-1#comment-38570 Ray Wood Mon, 13 Dec 2010 21:36:38 +0000 http://www.inspirated.com/wordpress/?p=219#comment-38570 I was able to use this info to make one of my user defined classes iterable. Which is to say that I was able to iterate thru it with a "for x in foobar" statement. But, apparently, this approach does not allow you to use the '[]' index selection syntax as is foobar[2]. Is there some additional method you have to add to your defined class for this, or it is that strictly for Python built-in types? I was able to use this info to make one of my user defined classes iterable. Which is to say that I was able to iterate thru it with a “for x in foobar” statement.

But, apparently, this approach does not allow you to use the ‘[]‘ index selection syntax as is foobar[2]. Is there some additional method you have to add to your defined class for this, or it is that strictly for Python built-in types?

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