Thomas Mlynarczyk <[EMAIL PROTECTED]> writes:
> Hello,
>
> I was playing around a bit with generators using next() and
> send(). And I was wondering why an extra send() method was introduced
> instead of simply allowing an argument for next().
>
> Also, I find it a bit counter-intuitive that send(42) not only "sets"
> the generator to the specified value, but yields the next value at the
> same time.
If you want to simply 'set' the generator (by which I take you mean
'change its state') without without iterating it one step, then what you
need is a class with an __iter__() method. Then you can change the
state of the object between calls to next(). E.g.
>>> class MyGenerator(object):
... def __init__(self, v): self.v = v
... def __iter__(self):
... for x in range(10):
... yield self.v
...
>>> g = MyGenerator(5)
>>> for i in g:
... g.v = input("val:")
... print i
...
val:4
5
val:10
4
val:34
10
val:56
34
val:
Etc...
--
Arnaud
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