Yosifov Pavel wrote: > On 13 июл, 14:12, Peter Otten <[EMAIL PROTECTED]> wrote: >> Yosifov Pavel wrote: >> > Whats is the way to clone "independent" iterator? I can't use tee(), >> > because I don't know how many "independent" iterators I need. copy and >> > deepcopy doesn't work... >> >> There is no general way. For "short" sequences you can store the items in >> a list which is also the worst-case behaviour of tee(). >> >> What are you trying to do? >> >> Peter > > I try to generate iterators (iterator of iterators). Peter, you are > right! Thank you. For example, it's possible to use something like > this: > > def cloneiter( it ): > """return (clonable,clone)""" > return tee(it)
[snip] That is too abstract, sorry. What concrete problem are you trying to solve with your cloned iterators? There might be a way to rearrange your setup in a way that doesn't need them. > But I think (I'm sure!) it's deficiency of Python iterators! They are > not very good... Well, I think Python's iterators, especially the generators, are beautiful. More importantly, I think there is no general way to make iterators copyable, regardless of the programming language. The problem is that most of the useful ones depend on external state. Peter -- http://mail.python.org/mailman/listinfo/python-list
