Why is there no __iter__() for lists strings and tuples?

[Jeff Epler]

On Fri, Dec 20, 2002 at 01:04:32PM -0800, Dennis Lee Bieber wrote:
>         Maybe in Python 2.3 that difference will be unified? <G>

Seems like it needs to be.

class RandomString(str):
    def __iter__(self):
        i = str.__iter__(self)
        while 1:
            if random() < .5: i.next()
            yield i.next()

>>> [c for c in RandomString("abcd")]
['c', 'd']
>>> [c for c in RandomString("abcd")]
['a', 'c']
>>> [c for c in RandomString("abcd")]
['a', 'c', 'd']
>>> # etc

Okay, so it's a pretty dumb use.  But I'm sure there's a legitimate
reason to subclass str to modify __iter__ in terms of the underlying
string's iterator...

Jeff