I was reading through old messages in the list and came up against an
idea that I thought might be of some value:
"Wouldn't it be a good idea if one could "rewind" an iterator?"
Not stated in precisely those terms, perhaps, but that's the way I read it.
I appreciate that one could use a sequence rather than an iterator, and
that I don't understand the implementation issues. (They don't look
large, but what to I know?)
But would it be a good idea to have a rewind method for iterators? I
tend to think of them as mag tapes, and I was always wanting to rewind
those. Or skip to file n. (Well, that probably doesn't have any
relevance to the usage of iterators.)
OTOH, if this is a bother, it's almost always quite easy to create a new
iterator, it just feels less efficient. Still, I would use this much
more often that I would use reversed (which I've never wanted to use).
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Hi there.
For most use cases I think about, the iterator protocol is more than enough.
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by: Terry Reedy |
last post by:
Luis Zarrabeitia wrote:
Interesting observation. Iterators are intended for 'iterate through
once and discard' usages. To zip a long sequence with several short
sequences, either use itertools.chain(short sequences) or put the short
sequences as the first zip arg.
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
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