urllib2 - iteration over non-sequence

[Erik Max Francis]

Paul Rubin wrote:

> If you know in advance that the page you're retrieving will be
> reasonable in size, then using readlines is fine.  If you don't know
> in advance what you're retrieving (e.g. you're working on a crawler)
> you have to assume that you'll hit some very large pages with
> difficult construction.

And that's before you even mention the point that, depending on the 
application, it could easily open yourself up to a DOS attack.

There's premature optimization, and then there's premature completely 
obvious and pointless waste.  This falls in the latter category.

Besides, someone was asking for/needing an older equivalent to iterating 
over a file.  That's obviously .xreadlines, not .readlines.

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